Students in the scholarship program at the Weizmann Institute in Rehovot, Israel, will do hands-on research and get to know the region. (photo from Weizmann Canada)
Weizmann Canada has scholarships for seven exceptional science students from Canada to participate in the Dr. Bessie F. Lawrence International Summer Science Institute (ISSI). The scholarship program – which will take place at the Weizmann Institute of Science in Rehovot, Israel, from June 30 to July 25, 2025 – is open to students between the ages of 18 and 20, including graduating high school seniors, gap-year students and first-year bachelor’s degree students.
ISSI offers a rigorous scientific experience, providing students with the opportunity to participate in hands-on research. During the program, students collaborate in small research groups, guided by institute researchers, on topics matching their skills. They use the latest tools, like electron microscopes and particle accelerators. Senior scientists enhance the experience with lectures and courses. The program culminates in team presentations of group theses based on their laboratory work.
Students will also have an opportunity to immerse themselves in a diverse scientific environment at a field school located in the Judean and Negev deserts. Expert guides from the Sde Boker field school will lead hikes that focus on the ecological, geographical and archeological features of this region.
Participants selected for this program will receive a full scholarship valued at more than $10,000, which covers airfare and all expenses incurred during their stay at the institute.
David Laugharne, who was a teacher at Maimonides Secondary School, King David High School’s predecessor, passed away in 1994. Thirty years later, his memory and his impact on the school continue to be honoured, including an award in his name given to a KDHS student each year. This year, the David Laugharne Science Award went to Hannah Karasenty Saltoun.
A painting of former Maimonides/KDHS teacher David Laugharne in 1975. (photo from Elizabeth Laugharne)
Laugharne is credited for boosting the science department at the high school. In the words of Rabbi Mordechai Feuerstein, a co-founder of Maimonides, who wrote to Laugharne in May 1994, “Your serious and sustained efforts really got the science department off the ground and recognized not only within the community, but throughout BC and, of course, in the Canada-Wide Science Fair, as well.
“It will be a long time, if ever, before another science teacher at Maimonides takes our school to the heights which you reached.”
Feuerstein added that Laugharne would be remembered at the school for, among other things, introducing it to the computer age, the artwork he contributed to many school events and his willingness to lend a helping hand whenever needed.
The rabbi also praised Laugharne for being a teacher that cared for students from both a professional standpoint and as a friend prepared to take a personal interest.
“You have always been a sensitive, caring person, David. I have always known the Almighty blessed you with ability – the ability to encourage and inspire, and the talent and sensitivity needed to work with young people,” wrote Feuerstein.
At the conclusion of his letter, Feuerstein shared that the board of governors at the school had decided to present a David Laugharne Science Award each year.
“This award will be given to the student who most exemplifies all the qualities you so caringly tried to instill in students, who you gave of yourself at Maimonides.
“It is a small token of the deep gratitude felt by all of us at Maimonides from the board level, through the administration, down to the students for whom you opened a world of learning. You have touched the lives of us all.”
Naomi Frankenburg, who was the president of Maimonides Secondary School in 1994, remembered Laugharne as an easy person to know and like and the first person on the staff with whom she developed a true friendship.
In a letter to Laugharne’s mother, Elizabeth, Frankenburg cited the work David had done as an important reason for her taking on the position to lead the school.
“My first visit to the school, before I had any formal connection to it, was a visit to the science fair and, like everybody else, I was most impressed. So much so that when I was urged to accept the presidency, the high standard of general studies and, especially, science, was a major factor in encouraging me to accept.”
Keith Thibodeau, a school administrator who worked with Laugharne at Collingwood School in West Vancouver at the time of its inception in 1984, remembered his colleague as someone who gave very generously of his time and talents to make the school ready for its opening day.
“He showed insight, organizational skills and leadership. He worked well with others and his sense of humour frequently eased times of tension and stress,” Thibodeau wrote.
Of Laugharne’s time at Maimonides, Thibodeau said, “His ability to teach competently in a number of subject areas, his willingness to be flexible, his astute skills in timetabling, general organization and finally his constant enthusiasm and devotion were crucial factors in the successful development of the school.”
On June 17, 1994, during the final assembly of the year at Maimonides, Gallit Amram spoke about Laugharne, saying that he was “an incredible teacher.”
“One never realizes what a great thing one has until it is gone, and that is very like the situation we have here,” she said. “Now that Mr. Laugharne is no longer with us, we can appreciate what a great person he was. It’s unfortunate that only when someone passes away do we realize how important he is to us.”
Laugharne’s success in bringing out the best in his students was also featured in a Feb. 27, 1992, article in the Jewish Western Bulletin (the predecessor of the Jewish Independent). Aside from science, Laugharne also taught drama and the story notes his goals of encouraging students to be creative and innovative.
The Greater Vancouver Regional Science Fair also presents a David Laugharne Award each year to a project that “incorporates new technology into the design, implementation or presentation of the work.” In 2024, the award was given to Jora SN for DeviceAble, a novel, hands-free computing app for people with disabilities.
Sam Margolishas written for the Globe and Mail, the National Post, UPI and MSNBC.
Left to right: Weizmann Canada national board members Dr. Rose Geist, Dr. Arthur Slutsky (chair), Myra Slutsky and Dr. Moira Stilwell at the Healing Power of Science gala on Sept. 17. (photo from Weizmann Canada)
Former BC MLA Dr. Moira Stilwell recently joined Weizmann Canada’s national board of directors. She traveled to Toronto last month for the group’s first in-person gathering since before the pandemic. While there, she attended the organization’s Healing Power of Science gala, which spotlights the vital importance of science education in building resilience in Israel and around the world.
For 60 years, Weizmann Canada has been the national philanthropic arm representing the Weizmann Institute of Science in Rehovot, Israel, which marks its 90th anniversary this year. For more information, visit weizmann.ca.
Weizmann Institute’s International Physics Tournament – the “Safe-Cracking Tournament” – is open to students in grades 11 and 12. (photo from Weizmann Canada)
Registration is now open for the Weizmann Institute’s International Physics Tournament. New this year – teams from Western Canada will be able to compete. A Zoom information session is scheduled for Sept. 23.
“Each spring, for the past 29 years, teams of highly talented high school students from around the world arrive at the Davidson Institute of Science Education, the educational arm of the Weizmann Institute of Science in Israel, to take part in the international physics tournament, commonly known as the ‘Safe-Cracking Tournament,’” Morgan Leibner, annual and education programs officer at Weizmann Canada, told the Independent.
In the competition, teams of high school students (grades 11 and 12) design and build a safe that has a locking mechanism based on principles of physics. “Teams are challenged to put their knowledge to the test, where they break into each other’s safes by solving the physics riddles,” explained Leibner.
“Throughout the tournament, participants gain experience in building systems that they invent,” she said. “It is a unique opportunity for students to put physical principles and their imagination into practice – it is a totally different, enjoyable, exciting and encouraging way of learning physics and collaboration, with the goal of competing internationally at the finals.”
While the finals take place in Israel – or online, as they did this year because of the war – there are semi-finals in Canada. They’ve usually taken place in Montreal, with school teams from Montreal and Toronto competing.
“This year, our goal is to expand the program to include a West Coast tournament, which will take place in Vancouver,” said Leibner. “We anticipate teams participating from Vancouver, Calgary and Winnipeg. One winning team will be selected from the West Coast and a second team will be selected from the East Coast to represent Canada at the finals in Israel.”
The registration deadline is Oct. 9 and, once accepted, “teams are required to check in with Weizmann Canada staff every one to two weeks to discuss their work, as well as their challenges and successes,” Leibner said. There are various milestones teams must meet by certain dates, with the semi-finals taking place in Montreal and Vancouver in early February, and the finals at the institute March 23-27, situation permitting.
Teams of three to five compete regionally for a chance to reach the finals in Israel. (photo from Weizmann Canada)
“The finals have been conducted virtually when circumstances make it unsafe for students to travel to the institute,” said Leibner. “In that case, students submit a video of their safe to the judges, explaining the locking mechanism and the physics principles required to open the safe successfully. The students’ videos are judged on roughly the same criteria and a winner is announced at a virtual Zoom session.”
Weizmann Institute of Science has hosted various versions of the high school physics tournament since 1973. “In fact, the winner of the first-ever physics tournament is Dan Gelbart – a notable Canada-based engineer and inventor. He won the tournament at the age of 16 with an original motor he designed and built himself using spare materials, some even sourced from his mother’s kitchen!” said Leibner.
Gelbart, who was born in Germany and raised in Israel, has lived in Canada since the 1970s. Based in Vancouver, he co-founded Creo, a local printing technology company that was bought by Eastman Kodak Co. in 2005, and he has co-founded several other companies. According to a profile on the Weizmann Institute’s website, Gelbart has registered some 145 patents. He also has volunteered as an adjunct professor at the University of British Columbia and has a YouTube channel – the most recent video, which was posted a couple of years ago, is a tour of his workshop and its instruments.
Typically, the physics tournament attracts between 200 and 300 participants a year, from Israel, Canada and other countries.
“The international tournament offers students an incredible opportunity to meet similarly scientific-minded youths from across the world,” said Leibner. “The tournament also offers a teacher development conference for the physics teachers accompanying teams to the tournament.”
“The international tournament offers students an incredible opportunity to meet similarly scientific-minded youths from across the world,” according to Morgan Leibner, annual and education programs officer at Weizmann Canada. (photo from Weizmann Canada)
Participants work in teams of three to five students and their local teacher/mentor – who is the one who must submit the team’s registration – coordinates with the tournament’s physics consultant throughout the process. The team’s safe is judged on its quality and complexity; team members’ level of understanding of the physics concepts being employed is key, as are the esthetics and originality of the safe they build.
“Local mentors are past participants of the physics tournament themselves,” said Leibner. “They have firsthand knowledge of the competition, what is required to build the safe, and what it is like to compete in the tournament. They have also participated in other educational opportunities at Weizmann Institute in Israel and have experienced living on campus and working with the community of scientists. Our mentors have a deep love and appreciation for science and an understanding that promoting STEM in education is incredibly important.”
For information on the tournament and to submit an application, visit weizmann.ca/physics.
At the Sept. 26 event Bridging Hope, which takes place at King David High School, Noah Bogdonov, left, and his parents, David Bogdonov and Elana Epstein, will speak about their family’s experience with addiction. (photo from Bogdonov-Epsteins)
“We want to share our experience, strength and hope with addiction,” said David Bogdonov about what he and his wife, Elana Epstein, and their son, Noah Bogdonov, will talk about on Sept. 26 at Bridging Hope: Science and Testimonial in the Fight Against Addiction.
The Independent spoke with the Bogdonov-Epsteins recently, to get to know them a bit before the event, which is being presented by Canadian Friends of the Hebrew University of Jerusalem, King David High School and Vancouver Talmud Torah.
David is an engineer and works for a company that builds waterparks, while Elana, who has a social work background, has been a yoga teacher for about 20 years and a wellness/spiritual coach for about 15 years. “Currently, I am supporting a ton of moms in the addiction community,” she said.
The couple has three sons. “Boys R Us” quipped David. “Noah is the firstborn, at 28 years old; Tal is our second, at 24; and Benjamin is our youngest, at 22.”
It was in October 2022 that they became sure that Noah was struggling with addiction. “Before that,” said Elana, “about three or four months before the ‘awakened moment,’ we knew that he had been struggling but he was telling us he had gotten it under control, not to worry, then it went downhill, crashing very fast.
“He started in high school – not unlike the vast majority of kids in high school – using weed and alcohol,” she said. “We didn’t like it, but we assumed it was part of his teenage years and that he would grow out of it and come to his own realization of how to find balance in life and, sadly, that never happened.”
Initially, it was Noah’s friends who tried to help.
“They held an informal intervention and asked him to get it under control,” said David. “That was in May of ’22, and that’s when we became aware of it, but he pulled the wool over our eyes and convinced us that he had it all under control. That’s when we started to make sense of all the red flags we had seen for a long time.”
Months later, when David and Elana were in Whistler, Noah was slower than usual to respond to a text message. “I woke up one morning and said that we need to go home, something is not right. He was staying at my brother’s apartment, who was away, and we knew. I said, we need to go, and we went, and we found him, and he was in dire straits,” said Elana. “But, he said, ‘I don’t want to live like this anymore.’ We asked, ‘Does that mean treatment?’ He said, ‘Yeah.’ We got the ball rolling, and he went right in, no hesitation, no more denial. He was ready, we were ready, and that was the beginning of the rest of his life.”
It’s been almost two years since Noah has been in treatment. He spent about 100 days at the Last Door Addiction Recovery Treatment Centre, in New Westminster, then was in transition housing, where he had a relapse that lasted two months, said David. It’s been 16 months since Noah’s relapse.
“David and I never stopped going to the weekly meetings, doing our own work,” said Elana, even while Noah was relapsing. The Last Door has family group meetings, which they’ve been attending regularly since Noah was two weeks into treatment, said David, calling their participation in the group a “very key element” of their own recovery.
Noah is working at Maintain Recovery, a sober living house, which he manages. “It’s a common story for many recovering addicts to get immersed in the life of recovery,” said David. “They often start to work in the organizations and so on. It’s part of what keeps them clean and keeps them on the path, which is really wonderful to watch.”
David and Elana are being so open about their family’s experiences because, said David, “We take quite seriously that part of the overdose crisis is caused by the stigma surrounding drug addition and we subscribe to the notion that addiction is a disease and should be treated like any other disease. You don’t shame someone for having cancer, you shouldn’t shame someone for having the disease of addiction. So, we are both passionate about that.”
“For me,” added Elana, “it goes beyond the stigma…. I really feel like if there were more language, more community, more education, more connection around this, you know, if I had had someone … approach me and say, listen, this is what addiction looks like, your son seems to be starting down a path that gets worse before it gets better…. In Noah’s life, we had no knowledge of addiction, we did not know what it looked like, we were totally blindsided,” she said.
“We don’t have trauma, there was no story he was hiding and trying to make peace with,” added Elana. “He was a boy who got caught up in using recreational drugs, like everyone else, [but] he was the one who was the addict who couldn’t stop. The moment when, with Noah’s permission, it became clear that we had a role to play in our community, where there’s a lot of shame and we don’t talk about it, so the kid dies. That’s not, on my watch, ever going to happen. If I can touch one family’s life because of our story, I will continue to do this till the day I die.”
Bridging Hope takes place at King David High School. Discussing the science of addiction will be Dr. Yaron Finkelstein, a professor of pediatrics, pharmacology and toxicology at the University of Toronto and a staff physician at the Hospital for Sick Children (known as SickKids); Dr. Yonatan Kupchik, senior lecturer and director, department of medical neurobiology, Institute for Medical Research Israel-Canada (IMRIC), Centre for Addiction Research (ICARe), the Hebrew University of Jerusalem; and Dr. Rami Yaka, head of HU’s School of Pharmacy. For tickets to the event ($18), visit register.cfhu.org/bridginghope.
Every year, more Canadian teenagers die by suicide than by all medical diseases combined, including cancer, diabetes, asthma and infections.
Dr. Yaron Finkelstein, a professor of pediatrics, pharmacology and toxicology at the University of Toronto and a staff physician at the Hospital for Sick Children (known as SickKids), shared this fact with the Jewish Independent in advance of Bridging Hope: Science and Testimonial in the Fight Against Addiction. Presented by Canadian Friends of the Hebrew University of Jerusalem, King David High School (KDHS) and Vancouver Talmud Torah (VTT), the Sept. 26 event at KDHS will also feature Dr. Yonatan Kupchik, senior lecturer, department of medical neurobiology, the Hebrew University of Jerusalem (HU), and Dr. Rami Yaka, head of the School of Pharmacy at HU, discussing the science of addiction. The testimonial part of the gathering will be shared by members of the Epstein-Bogdonov family. In this issue of the Independent, we talk to the doctors. Next issue, we will meet Elana Epstein and David Bogdonov, who, with their son, Noah Bogdonov, will speak in September about their family’s experience with addiction.
“Drug overdose, led by the opioids crisis, is an immense public health problem in BC, Canada and globally,” Finkelstein said. “Effectively addressing the loss of so many people for overdose daily, a largely preventable condition, must be a national priority. Indeed, youths are also highly affected, and we see them in the emergency departments, in clinics and, sadly, on the streets. Further, some youths use overdose as a common means of self-harm and suicide attempt.”
Finkelstein added that “most medications administered to children, particularly in hospitals (up to 85% in some acute care settings) have not been properly studied and approved in this population. Rather, we ‘borrow’ them from our experience in adults, scale the dose down to the child’s weight and hope to achieve the same effects and outcomes. However, we know this is not always the case, sometimes the outcomes are unwarranted, and I have personally noticed that repeatedly over the years. The goal of my research program is to work hard and close this knowledge gap – find the safest and most effective medications for children, and tailor their dosing regimens to the pediatric needs.”
Dr. Yaron Finkelstein (photo from Sickkids website)
At Bridging Hope, Finkelstein will discuss “the impacts of cannabis legalization on pediatric poisonings – trends and severity (for example, many do not appreciate that edible cannabis products can kill a child) – and on mental health, including addiction and the risk of developing schizophrenia in youths and adults.”
Canada became the second country to legalize cannabis for recreational use in 2018, he said. “This ‘natural experiment’ has led to numerous unanticipated outcomes, many have negative impacts on public health, and particularly on children.”
Finkelstein’s main research is centred on pediatric therapeutics in acute-care settings, with the long-term goal of optimizing drug safety.
“During my clinical clerkship in medical school, my passion to help children grew tremendously, and I was inspired by my mentors,” he shared. “Children have immense resilience, and their recovery is often fast and remarkable, and provides hope. I was always fascinated by the mechanistic actions of drugs on the human body, and combining those passions felt natural.”
“From the early beginning of my studies, I was thrilled to understand how the brain functions,” said Yaka, who not just heads HU’s School of Pharmacy but conducts research as well. “The brain reward circuitry is the most important system in any living creature, since it is responsible for our survival and reproduction, therefore, our existence. My main research is focused on synaptic function in health and disease.”
Dr. Rami Yaka (photo from HU website)
Yaka joined the School of Pharmacy in 2003 and has served in many capacities. “Since I feel that the School of Pharmacy is like my second home and I really care about its future, and since I have all the necessary experience to take this mission, I volunteered to head the school,” he said. “Maintaining the right balance between the administrative duties and the research (my main cause of being here) is challenging. I work harder and try to pay the same attention to both tasks without reducing any effort for either.”
On Sept. 26, Yaka will talk about “‘out of the box’ research to battle drug addiction.”
“Since addiction to drugs, screens, food, etc., is very common and spreads all over the world very easily, this subject is very popular among laypeople,” he said. “Therefore, for me, it’s easy to adopt lay language to explain in simple words what the problem is and what we can do to avoid having it. I think that a huge part of the problem is the lack of knowledge among users (mainly young) about the adverse effects and negative impact that drugs have on the brain.”
With respect to educating youth and engaging them more broadly in science, Kupchik sees his role as a principal investigator at a leading university as “not only to generate new knowledge that may lead the world forward but also to plant the seeds for the next generation of principal investigators.”
“In Israel,” said Kupchik, “there are several programs that select the top high school students in the country and expose them to academia at their early age. This is excellent, but … there are many excellent students that we may be missing as a society just because they live in underprivileged places. Therefore, we try in the lab to specifically target those populations of students, and we do it in various ways. For example … [we] started an initiative that invites local high school students to scientific conferences taking place in their vicinity. For many students, this is the first interaction with science and many of them reported later that it induced interest in the scientific world. We also invite high school students to our laboratory and provide an interactive experience in which they learn about the brain and how scientific research is performed.”
Dr. Yonatan Kupchik (photo from HU website)
What most intrigues Kupchik about neurobiology “is how a biological organ, composed of billions of neurons that communicate with each other, generates such complex phenomena as behaviour, emotion, thoughts, etc.” His lab at HU researches the changes occurring in single neurons or in brain circuits in drug addiction or obesity. Among other things, they are currently collaborating with two neighbouring labs.
“One is with the laboratory of Dr. Shai Sabbah, an expert in the neurobiology of light processing in the eye. It is known that exposure to light can affect mood and the neural activity in brain areas related to emotions. We are investigating in this collaboration whether light exposure could also affect drug-seeking behaviour.
“Another collaboration is with the laboratory of Dr. Danny Ben-Zvi, an endocrinologist and expert of the bariatric surgery. As bariatric surgery decreases the craving for rewarding foods, we are now investigating together whether the bariatric surgery drives permanent changes in the reward system of the brain and whether it could affect the craving for other, non-food, rewards.”
Kupchik said, “We believe that there are many similarities between behaviours that may reflect addiction, such as drug dependence, overeating, gambling, hoarding, computer gaming, social media use and so on, and hope that understanding the neurobiological mechanisms in one kind of addiction could hint about the mechanisms of other addictions. We chose to focus on drug addiction and on obesity both because these are two main global health challenges that remain unsolved and because these are conditions that can be modeled in laboratory animals.”
At King David High School, Kupchik “will try to show some of the permanent changes we found that occur in the reward system after using cocaine, and after withdrawal.”
Jem Rolls’ The Kid Was a Spy is part of this year’s Vancouver Fringe Festival, which runs Sept 5-15. Other Jewish community members with shows include Rita Sheena, with Everybody Knows: Leonard Cohen Dance Theatre, and Theatre Terrific artistic director Laen Hershler and Susan Bertoia co-direct Proximity: The Space Between Us, which was co-created by an all-abilities cast. For the full festival lineup and tickets, visit vancouverfringe.com.
Antisemitism, dubbed “the longest hatred,” has seemed impervious to challenge. It is a social problem that shifts to meet demand, allowing perpetrators to tailor it to fit their “need.” What if there were a pill you could prescribe to “cure” a person of antisemitism? There may be.
It seems almost like an April Fool’s joke or a Purim spoof, but the timing isn’t quite right. Rob Eshman, senior contributing editor to the Forward, published a piece last weekend suggesting there may indeed be a pharmaceutical answer to this age-old problem.
MDMA, the understandably needed short form for the drug methylenedioxymethamphetamine – aka “Ecstasy” or “Molly” – has been popular for some time, primarily with people who enjoy what the U.S. National Institutes of Health calls its effects of “sympathomimetic arousal, sensual enhancement, feelings of euphoria, and emotional closeness to others.”
Like most good things, of course, this drug comes with a wide range of unwelcome side effects. But the trade-offs have been deemed worthy enough that the drug has been used in Israel since 2019 to combat post-traumatic stress disorder, Eshman writes, and the U.S. Food and Drug Administration is expected to approve it for some uses in the next couple of years.
Israel’s use of MDMA for PTSD is far from the only Jewish connection the author found. The drug was first synthesized more than a century ago by Alexander Shulgin, a California pharmacologist whose Jewish family fled Russia, and who has been called “the zeyde of psychedelics.”
Last month, science journalist Rachel Nuwer (also Jewish) published the book I Feel Love: MDMA and the Search for Connection in a Fractured World, in which she shares the story of a white supremacist who was integral to the 2017 hate rally in Charlottesville, Va. After treatment with MDMA, the individual renounced his racist orientation and declared “Love is the most important thing.”
If there is a chance that an ingestible element (currently a banned substance in Canada, the United States and most places) could address a major scourge of civilization – not just antisemitism but all forms of hatred – do we not owe it to ourselves to allocate resources to investigating the pros (and cons)?
A variety of research is ongoing, of course, including an annual Jewish Psychedelic Summit, where medical, religious, psychology and other experts discuss psychedelics and Judaism. (It’s a virtual affair, so one can only imagine the hospitality suites if it were in-person.)
The application of plant medicines and synthetic drugs to combat what we generally deem a social problem may seem dubious – and researchers say it probably wouldn’t work if the recipient isn’t predisposed to change. However, the idea may not be as outrageous as it sounds. We recently ran an article about the late psychotherapist Dr. Theodore Isaac Rubin, whose landmark 1990 book Anti-Semitism: A Disease of the Mindposited that bias against Jews could in many instances be considered a mental disorder. We have long accepted, welcomed even, pharmaceutical responses to treatable mental issues. Why not this one?
Of course, anything that changes brain chemistry or neurobiology should be approached with immense care – more care, for example, than we have demonstrated in wildly embracing over the past several decades the new technologies that have been shown to shorten our attention spans and alter the functioning of our brains, as we discussed in this space last issue.
At the same time, we would be foolish to ignore the potential for something that could ameliorate some of the worst characteristics of the human experience. Think back at the horrors that might have been alleviated had we been able to slip a “love potion” into the water glasses of history’s most evil figures.
Some experts, Eshman explains, are looking into the role MDMA could play in addressing the Israeli-Palestinian conflict. While we work on other avenues for the changes needed to bring more love and justice to the challenges inherent in that conflict, if there is a glimmer of hope that a chemical solution exists for some of the most destructive features of our species, we would be fools to dismiss it.
A band of clouds above the equator, created by the rise of air within the Hadley cell and responsible for heavy rainfall in this region. (photo from Weizmann Institute)
Why do parts of earth become rainforests, whereas others turn into deserts? A new study exposes the far-reaching impact of human activity on a global airflow phenomenon that crucially affects earth’s regional climates.
In the tropics, above the equatorial rainforests and oceans, the strong solar radiation hitting earth propels a stream of warm, moist air far upward. Once reaching the upper atmosphere, this stream moves in both hemispheres toward the poles; it then descends in the subtropical regions at around 20 to 30 degrees latitude, contributing to the creation of massive deserts like the Sahara in northern Africa. From there, the stream – known as the Hadley cell – returns to the equator, where it heats up and rises again, embarking on its circular journey anew.
The two Hadley cells – the northern and the southern – circulate most of the heat and humidity across low latitudes, greatly affecting the global distribution of climate regions. When the warm, moist air rises, it cools down, allowing water vapour to condense, which leads to heavy rainfall deep in the tropics. In contrast, the streams of air that descend toward the earth in subtropical regions are accompanied by warm, dry winds that reduce rainfall. In essence, the Hadley cells determine which regions in the tropics and the subtropics will have arid deserts and which will be blessed with abundant rainfall. Israel is located on the margins of the northern Hadley cell, which contributes to the country’s semiarid climate.
Because of their huge significance, the Hadley cells are of great interest to climate scientists. However, while there is plenty of global data about rainfall and temperature, measuring airflow throughout the atmosphere is next to impossible. Adding to the quandary, the various models seeking to make sense of the Hadley cells have been found to contradict one another. Global climate models, which are used for climate projections, indicate that the northern Hadley cell has weakened over the past few decades, whereas observation-based analyses suggest the exact opposite.
An uncertainty over a system that is so essential to earth’s climate detracts from the researchers’ ability to assess how much humans have contributed to recent climate change. This, in turn, undermines the credibility of climate projections, making it ever harder to formulate policies required for dealing with the climate crisis. The latest report of the Intergovernmental Panel on Climate Change, the most important document in the field, makes a special point of this issue.
In a paper published in Nature, Dr. Rei Chemke, of the earth and planetary sciences department at the Weizmann Institute of Science, and Dr. Janni Yuval, of the Massachusetts Institute of Technology, address the uncertainty that has plagued the existing models for the past two decades. They propose an observation-based method for measuring the intensity of airflow in the Hadley cells.
To tackle the challenge, Chemke and Yuval looked for readily available data they could use to formulate a new way of measuring the cells’ intensity. After examining physics equations describing airflow, they identified a relationship between the Hadley cell intensity and a constantly monitored parameter: air pressure at sea level. They then examined observational data collected over several decades and reached the conclusion that the intensity of the northern Hadley cell has indeed been weakening – just as suggested by global climate models. Moreover, they were able to show, with more than 99% certainty, that this weakening has been the result of human activity and will likely continue.
What, then, is to be expected? Over the coming decades, the weakening of the northern Hadley cell is likely to mitigate the projected precipitation changes at low latitudes. It will act to temper both the increase of rainfall in equatorial regions and the reduction of rainfall in the subtropical regions. This tempering, however, might only reduce, but not overcome, the projected aridification and desertification of Israel.
“In our follow-up study,” said Chemke, “we will examine whether a similar weakening in the Hadley cell has happened in the past thousand years owing to natural phenomena – and that will allow us to assess how unprecedented these human-induced changes are.”
Igal Hecht filming Secrets of the Land. (photo from Chutzpa Productions Inc.)
The Western Wall area, with thousands of metres of subterranean space, contains much that is yet to be discovered. The latest find in this space is a market. While not open to the public, people can get a glimpse of the ancient market on the new Yes TV documentary series Secrets of the Land, directed, produced and written by Israeli-Canadian filmmaker Igal Hecht.
Each episode of Secrets of the Land, which is presented by Chutzpa Productions Inc., takes viewers behind the scenes of substantial excavations in Israel, and features some of the region’s top archeologists and most historically significant sites. The series debuted March 15, and runs each week for 13 episodes.
In addition to on-site discoveries, Hecht visits the labs that explore the meanings of each artifact.
“I realized that the way archaeology is explored today is very CSI,” said Hecht, referring to the popular television series. “The excavations themselves might be low-tech, but everything that comes after, such as carbon dating and things along those lines are very high-tech.”
One of many examples is when archeologists found grape seeds in 2,000-year-old donkey feces and, through that, determined the types of people who lived in the area.
Prof. Erez Ben-Yosef speaking with colleagues in the archeology lab at Tel Aviv University. (photo from Tel Aviv University / Chutzpa Productions Inc.)
Hecht and his crew – which included Lior Cohen, Gabriel Volcovich, Nikki Greenspan and Julian Hoffman – take viewers on a journey through various parts of the Holy Land. Hecht said he learned something every step of the way.
“I had very little knowledge [of archeology],” Hecht told the Independent. “In fact, in the show, I don’t pretend that I do. That makes the show work. I am there experiencing the discoveries in the same manner that the audience does, as they watch at home.”
Among many sites, the crew visited Timna, the location of Solomon’s Mines, where Hecht was awed by the landscape. “The rock formation is something you’d see in Petra in Jordan or the Grand Canyon,” he said. “There’s so much beauty and history to explore there.”
Other locales included Tower of David, also known as the Citadel, located near the Jaffa Gate entrance to the Old City of Jerusalem. There’s also an episode about Shiloh, in Samaria, or the West Bank, where the Israelites, prior to King David’s time, set up a sanctuary and city, and where the Ark of the Covenant was housed for hundreds of years. Meanwhile, Magdala is home to an ancient city from the first century, where recent excavations revealed the Migdal Synagogue, dating from the Second Temple.
Over the past quarter-century, Hecht has been involved in the production of more than 50 documentary films and more than 20 television series. His projects have appeared on Netflix, BBC, Documentary Channel, CBC, HBO Europe, and others. Secrets of the Land is the latest in a string of Jewish-themed films, such as A Universal Language, which taped six comedians performing in Israel. An upcoming project includes The Jewish Shadow, a documentary that explores the lives of Soviet Jews in 1970s Ukraine.
For Hecht, Secrets of the Land wasn’t merely a project, but very much a passion to do his part to help the Jewish people.
“I think the biggest takeaway for Jewish audiences is the historical and unbreakable connection of the Jewish people to that land,” he said. “That archeology truly proves that the Jews were, in fact, living in Judea and Samaria, Jerusalem and all over the Fertile Crescent thousands of years ago.”
Dave Gordon is a Toronto-based freelance writer whose work has appeared in more than 100 publications around the world. His website is davegordonwrites.com.
