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Preview: Antarctic Current Events and Antarctic News from Brightsurf

Antarctic Current Events and Antarctic News from Brightsurf



Antarctic Current Events and Antarctic News Events, Discoveries and Articles from Brightsurf



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Study reveals new Antarctic process contributing to sea level rise and climate change

Wed, 18 Apr 18 00:11:30 -0700

A new study has revealed a previously undocumented process where melting glacial ice sheets change the ocean in a way that further accelerates the rate of ice melt and sea level rise. Led by IMAS PhD student Alessandro Silvano and published in the journal Science Advances, the research found that glacial meltwater makes the ocean's surface layer less salty and more buoyant, preventing deep mixing in winter and allowing warm water at depth to retain its heat and further melt glaciers from below.



Hotter, longer, more frequent -- marine heatwaves on the rise

Tue, 10 Apr 18 00:07:10 -0700

We know heatwaves over land have been increasing, but now new research reveals globally marine heatwaves have also been increasing in length, number and intensity over the past century. More intriguing still, this trend has accelerated markedly since 1982.



Research suggests water appeared while Earth was still growing

Fri, 06 Apr 18 00:13:10 -0700

A team including UChicago cosmochemist Nicolas Dauphas performed the largest study to date of oxygen isotopes in lunar rocks, and found a small but measurable difference in the makeup of the moon and Earth. Published March 28 in Science Advances, the research proposes that Earth acquired the majority of its water during the main stage of its growth--which counters a popular theory.



Captain Scott's Discovery expedition offers climate change insight 100 years on

Wed, 04 Apr 18 00:15:10 -0700

Samples collected during Captain Scott's famous 1901-1904 Discovery expedition to Antarctica, the oldest of their kind, have recently undergone new analysis using modern techniques providing scientists with exciting new data, over 100 years after the voyage.



Antarctica retreating across the sea floor

Mon, 02 Apr 18 00:04:20 -0700

Antarctica's great ice sheet is losing ground as it is eroded by warm ocean water circulating beneath its floating edge, a new study has found. Scientists have tracked the movement of Antarctica's grounding line using European Space Agency's CryoSat-2 across 16,000 km of the coastline.



Predicting water storage beyond 2-5 years over global semiarid regions

Mon, 02 Apr 18 00:16:30 -0700

Scientists from Institute of Atmospheric Physics, Chinese Academy of Sciences made skillful prediction for terrestrial water storage over one-third of land areas (excluding Antarctic, Greenland, and desert regions) beyond two to five years, especially for semiarid regions where deep soil water and aquifer have a long memory and a non-negligible variability. The hindcast skill can be further enhanced by incorporating low-frequency climate information, including the Pacific Decadal Oscillation and Atlantic Multidecadal Oscillation.



Palm trees are spreading northward. How far will they go?

Mon, 19 Mar 18 00:08:40 -0700

What does it take for palm trees, the unofficial trademark of tropical landscapes, to expand into northern parts of the world that have long been too cold for palm trees to survive? A new study, led by Lamont-Doherty Earth Observatory researcher Tammo Reichgelt, attempts to answer this question. He and his colleagues analyzed a broad dataset to determine global palm tree distribution in relation to temperature.



Soot transported from elsewhere in world contributes little to melting of some Antarctic glaciers

Fri, 16 Mar 18 00:07:00 -0700

Airborne soot produced by wildfires and fossil-fuel combustion and transported to the remote McMurdo Dry Valleys of Antarctica contains levels of black carbon too low to contribute significantly to the melting of local glaciers, according to a new study by researchers supported by the National Science Foundation (NSF).



Fishery yields will be dramatically reduced by 2300, study sugges

Thu, 08 Mar 18 00:04:20 -0800

By 2300, climate change may cause fishery yields to decline by as much as 20 percent around the globe, and by as much as 60% in the North Atlantic, a new modeling study suggests.



Fossilised plant leaf wax provides new tool for understanding ancient climates

Fri, 02 Mar 18 00:04:30 -0800

New research, published in Scientific Reports, has outlined a new methodology for estimating ancient atmospheric water content based on fossil plant leaf waxes.



Previously unknown 'supercolony' of Adélie penguins discovered in Antarctica

Fri, 02 Mar 18 00:04:20 -0800

In a paper released on March 2nd in the journal Scientific Reports, the scientists announced the discovery of a previously unknown 'supercolony' of more than 1,500,000 Adélie Penguins in the Danger Islands, a chain of remote, rocky islands off of the Antarctic Peninsula's northern tip.



Scientists use satellites and drones to discover antarctic penguin 'super-colonies'

Fri, 02 Mar 18 00:07:40 -0800

A recent scientific expedition to the Danger Islands, a remote group of tiny islands along eastern side of the Antarctic Peninsula, used new technologies to discover and survey a breeding colony of more than 1.5 million penguins.



King penguins may be on the move very soon

Mon, 26 Feb 18 00:01:10 -0800

More than 70 percent of the global King penguin population, currently forming colonies in Crozet, Kerguelen and Marion sub-Antarctic islands, may be nothing more than a memory in a matter of decades, as global warming will soon force the birds to move south, or disappear. This is the conclusion of a study published in the current issue of the prestigious journal Nature Climate Change and performed by an international team of researchers.



Stagnation in the South Pacific

Thu, 22 Feb 18 00:11:30 -0800

A team led by geochemist Dr. Katharina Pahnke from Oldenburg has discovered important evidence that the rise in atmospheric carbon dioxide levels at the end of the last ice age was triggered by changes in the Antarctic Ocean.



Sea-level legacy: more rise for each delay in peaking emissions

Tue, 20 Feb 18 00:07:40 -0800

Peaking global CO2 emissions as soon as possible is crucial for limiting the risks of sea-level rise, even if global warming is limited to well below 2 degrees C. A study now published in the journal Nature Communications analyzes for the first time the sea-level legacy until 2300 within the constraints of the Paris Agreement.



Monitoring bacteria on whale skin

Wed, 14 Feb 18 00:06:20 -0800

Just like with humans, the skin on marine mammals serves as an important line of defense against pathogens in their environment. A new study sheds light on the skin microbiome--a group of microorganisms that live on skin--in healthy humpback whales, which could aid in future efforts to monitor their health.



#EpicDuckChallenge shows we can count on drones

Tue, 13 Feb 18 00:13:40 -0800

A few thousand rubber ducks, a group of experienced wildlife spotters and a drone have proven the usefulness and accuracy of drones for wildlife monitoring. A University of Adelaide study showed that monitoring wildlife using drones is more accurate than traditional counting approaches.



New study finds sea level rise accelerating

Tue, 13 Feb 18 00:06:50 -0800

Global sea level rise has been accelerating in recent decades, rather than increasing steadily, according to a new study based on 25 years of NASA and European satellite data.



NASA's longest running survey of ice shattered records in 2017

Tue, 13 Feb 18 00:09:40 -0800

Last year was a record-breaking one for Operation IceBridge, NASA's aerial survey of the state of polar ice.



Ozone at lower latitudes is not recovering, despite Antarctic ozone hole healing

Tue, 06 Feb 18 00:07:40 -0800

The ozone layer -- which protects us from harmful ultraviolet radiation -- is recovering at the poles, but unexpected decreases in part of the atmosphere may be preventing recovery at lower latitudes.



North American ice sheet decay decreased climate variability in the Southern Hemisphere

Mon, 05 Feb 18 00:13:00 -0800

The changing topography of ice sheets in the Northern Hemisphere during the last Ice Age forced changes in the climate of Antarctica, a previously undocumented inter-polar climate change mechanism.



Climate variability -- past and future

Mon, 05 Feb 18 00:11:50 -0800

On the basis of a unique global comparison of data from core samples extracted from the ocean floor and the polar ice sheets, AWI researchers have now demonstrated that, though climate changes have indeed decreased around the globe from glacial to interglacial periods, the difference is by no means as pronounced as previously assumed (Nature advanced online publication). Until now, it was believed that glacial periods were characterised by extreme temperature variability, while interglacial periods were relatively stable.



MSU biliogists: Bryozoans, brachiopods, and phoronida originate from the common ancestor

Tue, 30 Jan 18 00:12:00 -0800

An associate of the Faculty of Biology of Lomonosov Moscow State University studied the nervous system of adult phoronida using modern methods and presented new facts in the long-lasting discussion about the taxonomy of invertebrates proving that phoronids, barchiopods, and bryozoans are relatives despite earlier arguments. The results of the work were published in Scientific Reports. The study was carried out within the framework of the 'Noah's Ark' project supported with a grant of Russian Science Foundation (RSF).