A decade ago, a thick layer of ice covered the Collins Glacier on Antarctica’s King George Island.
Now, the rocky landscape is visible to the naked eye, in a region that is both a victim of and a laboratory for climate change.
“I had the opportunity to come here over a 15-year period, and even within a human’s lifetime, you can already see the changes brought about by climate change,” Chilean Antarctic Institute (INACH) director Marcelo Leppe told reporters.
Photo: AFP
Observers can now see “rocks that we weren’t seeing five or 10 years ago, and that is direct evidence of the shrinking of these glaciers and loss of mass,” he said.
However, even as these melting glaciers worry the scientific world, the presence in Antarctica of plants proving resistant to extreme conditions has also sparked hope for a warming planet.
Chile is one of about 20 countries with scientific bases on the cold continent. Its Professor Julio Escudero complex on King George Island is where dozens of researchers are measuring the effects of climate change on native flora and fauna.
“We need to quantify the change to predict what could happen in the near future,” Leppe said.
Measurements taken last year by Chilean scientists on Doumer Island in Antarctica’s Palmer Archipelago showed that water temperature had risen to 2.5°C, up from its normal range of between 0°C and 1.5°C. And at a depth of 40 meters, it was still at 2°C.
The warming waters have attracted species previously unseen in the Antarctic, such as a spider crab normally found south of Chile. There is also a blooming of green algae, which is vital for the local ecosystem, especially for crustaceans.
“Even though they’re really small, the algae and the micro-algae are really important for balance in the food chain,” said Nelson Valdivia, a professor at Austral University of Chile. “They supply nutrients to the rest of the ecosystem, and we know that the number of species in the same ecosystem is a very important factor in terms of it remaining in good health.”
However, over a longer term, this flourishing of algae could unsettle the ecological balance.
The worry is “losing species that we don’t even yet know exist,” Valdivia said.
Scientists also fear the effect of warmer temperatures on the rest of the world.
According to NASA monitoring, between 2002 and 2016, Antarctica lost 125 gigatonnes of ice per year, causing sea levels worldwide to rise 0.35mm annually.
Antarctica holds 62 percent of the planet’s freshwater reserves, so the melting there could have far-reaching consequences, not least by diminishing the salinity of the seas, which could prove fatal for many marine species.
However, the white continent might also hold the key to plant and animal life adapting to changing temperatures.
Already, Antarctic plants — which are resistant to ultraviolet radiation and extreme conditions — are being used in biotechnology to give us sun protection lotion, antioxidants and natural sugars.
To survive the rigorous conditions, vegetation in Antarctica hoards sugar to survive the harsh winter months buried under the snow.
In some mini-greenhouses, Marisol Pizarro, a biotechnology researcher from the University of Santiago, studies how Antarctic plants react to temperatures artificially raised by 1°C or 2°C.
Her finding is that mosses survive the change quite well — an advantage that could serve other vegetation in the future.
“We could transfer a gene linked to this tolerance for dry conditions to a common plant, such as lettuce or rice, to give that plant the ability to tolerate drought,” she said. “As a result, it would be less affected by the adverse, unfavorable conditions due to diminished water in its environment.”
With Antarctica being one of the fastest-warming regions on Earth, the scientists there are working against the clock.
Those from Chile are conducting about 100 projects ranging from genetic observations in penguins, to how solar activity influences the polar environment, to comparing indigenous mollusks with those in South America.
Republican US lawmakers on Friday criticized US President Joe Biden’s administration after sanctioned Chinese telecoms equipment giant Huawei unveiled a laptop this week powered by an Intel artificial intelligence (AI) chip. The US placed Huawei on a trade restriction list in 2019 for contravening Iran sanctions, part of a broader effort to hobble Beijing’s technological advances. Placement on the list means the company’s suppliers have to seek a special, difficult-to-obtain license before shipping to it. One such license, issued by then-US president Donald Trump’s administration, has allowed Intel to ship central processors to Huawei for use in laptops since 2020. China hardliners
A top Vietnamese property tycoon was on Thursday sentenced to death in one of the biggest corruption cases in history, with an estimated US$27 billion in damages. A panel of three hand-picked jurors and two judges rejected all defense arguments by Truong My Lan, chair of major developer Van Thinh Phat, who was found guilty of swindling cash from Saigon Commercial Bank (SCB) over a decade. “The defendant’s actions ... eroded people’s trust in the leadership of the [Communist] Party and state,” read the verdict at the trial in Ho Chi Minh City. After the five-week trial, 85 others were also sentenced on
Conjoined twins Lori and George Schappell, who pursued separate careers, interests and relationships during lives that defied medical expectations, died this month in Pennsylvania, funeral home officials said. They were 62. The twins, listed by Guinness World Records as the oldest living conjoined twins, died on April 7 at the Hospital of the University of Pennsylvania, obituaries posted by Leibensperger Funeral Homes of Hamburg said. The cause of death was not detailed. “When we were born, the doctors didn’t think we’d make 30, but we proved them wrong,” Lori said in an interview when they turned 50, the Philadelphia Inquirer reported. The
RAMPAGE: A Palestinian man was left dead after dozens of Israeli settlers searching for a missing 14-year-old boy stormed a village in the Israeli-occupied West Bank US President Joe Biden on Friday said he expected Iran to attack Israel “sooner, rather than later” and warned Tehran not to proceed. Asked by reporters about his message to Iran, Biden simply said: “Don’t,” underscoring Washington’s commitment to defend Israel. “We are devoted to the defense of Israel. We will support Israel. We will help defend Israel and Iran will not succeed,” he said. Biden said he would not divulge secure information, but said his expectation was that an attack could come “sooner, rather than later.” Israel braced on Friday for an attack by Iran or its proxies as warnings grew of