The women of Homeward Bound. Photo credit: Anne Christianson
By Molly Taft
Heidi Steltzer's job, as she put it, is "hiking where no one else will go." As a mountain and polar ecologist studying rare plants, she's accustomed to traveling to breathtaking Arctic vistas to chase flora along mountain ridges.
But watching glaciers calve on her first trip to Antarctica last December was a one-of-a-kind experience for the scientist. "You kind of want to see it," she said. "Even though you know it's not a good thing, you kind of want to be there."
63.5º F: Antarctica's New Record High Temp https://t.co/DIoR6W628I @LeoHickman @beyondzeronews— EcoWatch (@EcoWatch)1488710406.0
As she watched the great icebergs float by the boat in Neko Harbor, another member of Seltzer's trip waved her arm at the scene, as if summoning a force to shave the glaciers surrounding them.
"Can you imagine if any one of us had that kind of power to see ice calve when you wanted to see it?" laughed Seltzer. "But at the same time, we knew, collectively—we do have that power. You can't say these specific glaciers are definitively calving because of human action. But these events continuing to happen is consistent in that system and consistent with what we know about human activity and climate change."
Heidi Steltzer.Anne Christianson
Seltzer's colleagues were more knowledgeable than your average gaggle of tourists. The travelers on her trip were all scientists and several of them focus specifically on climate change. What's more, her 75 companions on the three-week trip were all women, bound together on the largest-ever, all-female expedition to Antarctica. The trip was the focal point of a year-long leadership development program called Homeward Bound, which aims to groom 1,000 women with science backgrounds over the next 10 years to influence public policy and dialogue.
While women made up more than 50 percent of the U.S. workforce in 2016, they represented only 24 percent of workers in STEM—science, technology, engineering and math. Representation in public policy is even worse: Women hold less than 23 percent of parliamentary positions worldwide and less than 20 percent of Congress is female. The founder of Homeward Bound told Reuters that inspiration came from the trip from hearing two scientists joke that a beard was a requirement to land an Antarctic research leadership role.
The women of Homeward Bound. Anne Christianson
The problem of female leadership in STEM isn't a new one. When Katharine Hayhoe, director of the Climate Science Center at Texas Tech University and a leading U.S. climate voice, was a second-year undergraduate physics student, the head of the department called her into his office to ask how the program could help encourage her career as a female physicist.
"My mentors in science from day one have all been male," she recalled. "I've learned a lot from them and I've been incredibly encouraged and supported by them. But at the same time, there have been differences between us."
Katharine Hayhoe.Katharine Hayhoe
Lifestyle and family changes, Hayhoe emphasized, provide a particular sticking point between the genders in STEM. "As I got older, I started to realize how big the gap was between colleagues who basically had a spouse who managed everything full time," she said. "They could just, at the drop of the hat, leap on an airplane and be off to a meeting, versus a mother who, before you do anything, you've got to do all the laundry, freeze the meals, figure out who is picking the kids up from schools. At this point, if someone asks me to do something at the drop of the hat, the answer is no—and this still happens to me today."
Steltzer echoed similar experiences. "At one point in time, women were present in equal measures to myself at a peer level," she said. "But now that I'm in my early 40s, an associate professor, in many environments I'm in there are fewer women. There are ways we can do better."
The polar plunge at Neko Bay.Sarah Brough
She pointed out that the perception of "good old boys' clubs" in male-dominated fields may just be men connecting with each other over shared experiences. Getting a group of female scientists together can create a collaborative, experience-based atmosphere that can be difficult for women to find at home. "Homeward Bound created for us women a space and a place where we feel connected to one another."
A tornado tore through a city north of Birmingham, Alabama, Monday night, killing one person and injuring at least 30.
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By Katherine Kornei
Clear-cutting a forest is relatively easy—just pick a tree and start chopping. But there are benefits to more sophisticated forest management. One technique—which involves repeatedly harvesting smaller trees every 30 or so years but leaving an upper story of larger trees for longer periods (60, 90, or 120 years)—ensures a steady supply of both firewood and construction timber.
A Pattern in the Rings<p>The <a href="https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/coppice-standards-0" target="_blank">coppice-with-standards</a> management practice produces a two-story forest, said <a href="https://www.researchgate.net/profile/Bernhard_Muigg" target="_blank">Bernhard Muigg</a>, a dendrochronologist at the University of Freiburg in Germany. "You have an upper story of single trees that are allowed to grow for several understory generations."</p><p>That arrangement imprints a characteristic tree ring pattern in a forest's upper story trees (the "standards"): thick rings indicative of heavy growth, which show up at regular intervals as the surrounding smaller trees are cut down. "The trees are growing faster," said Muigg. "You can really see it with your naked eye."</p><p>Muigg and his collaborators characterized that <a href="https://ltrr.arizona.edu/about/treerings" target="_blank">dendrochronological pattern</a> in 161 oak trees growing in central Germany, one of the few remaining sites in Europe with actively managed coppice-with-standards forests. They found up to nine cycles of heavy growth in the trees, the oldest of which was planted in 1761. The researchers then turned to a historical data set — more than 2,000 oak <a href="https://eos.org/articles/podcast-discovering-europes-history-through-its-timbers" target="_blank" rel="noopener noreferrer">timbers from buildings and archaeological sites</a> in Germany and France dating from between 300 and 2015 — to look for a similar pattern.</p>
A Gap of 500 Years<p>The team found wood with the characteristic coppice-with-standards tree ring pattern dating to as early as the 6th century. That was a surprise, Muigg and his colleagues concluded, because the first mention of this forest management practice in historical documents occurred only roughly 500 years later, in the 13th century.</p><p>It's probable that forest management practices were not well documented prior to the High Middle Ages (1000–1250), the researchers suggested. "Forests are mainly mentioned in the context of royal hunting interests or donations," said Muigg. Dendrochronological studies are particularly important because they can reveal information not captured by a sparse historical record, he added.</p><p>These results were <a href="https://www.nature.com/articles/s41598-020-78933-8" target="_blank">published in December in <em>Scientific Reports</em></a>.</p><p>"It's nice to see the longevity and the history of coppice-with-standards," said <a href="https://www.teagasc.ie/contact/staff-directory/s/ian-short/" target="_blank">Ian Short</a>, a forestry researcher at Teagasc, the Agriculture and Food Development Authority in Ireland, not involved in the research. This technique is valuable because it promotes conservation and habitat biodiversity, Short said. "In the next 10 or 20 years, I think we'll see more coppice-with-standards coming back into production."</p><p>In the future, Muigg and his collaborators hope to analyze a larger sample of historic timbers to trace how the coppice-with-standards practice spread throughout Europe. It will be interesting to understand where this technique originated and how it propagated, said Muigg, and there are plenty of old pieces of wood waiting to be analyzed. "There [are] tons of dendrochronological data."</p><p><em><a href="mailto:firstname.lastname@example.org" target="_blank" rel="noopener noreferrer">Katherine Kornei</a> is a freelance science journalist covering Earth and space science. Her bylines frequently appear in Eos, Science, and The New York Times. Katherine holds a Ph.D. in astronomy from the University of California, Los Angeles.</em></p><p><em>This story originally appeared in <a href="https://eos.org/articles/tree-rings-reveal-how-ancient-forests-were-managed" target="_blank">Eos</a></em> <em>and is republished here as part of Covering Climate Now, a global journalism collaboration strengthening coverage of the climate story.</em></p>
Earth's ice is melting 57 percent faster than in the 1990s and the world has lost more than 28 trillion tons of ice since 1994, research published Monday in The Cryosphere shows.
By Jewel Fraser
Noreen Nunez lives in a middle-class neighborhood that rises up a hillside in Trinidad's Tunapuna-Piarco region.