Antarctic Headlines 12/12/2019

Team releases high-precision map of Antarctic ice sheet bed topography
Phys.org, 2019-12-12
The new Antarctic bed topography product was constructed using ice thickness data from 19 different research institutes dating back to 1967, encompassing nearly a million line-miles of radar soundings. In addition, BedMachine’s creators utilized ice shelf bathymetry measurements from NASA’s Operation IceBridge campaigns, as well as ice flow …

Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet
Nature, 2019-12-12
The Antarctic ice sheet has been losing mass over past decades through the accelerated flow of its glaciers, conditioned by ocean temperature and bed topography. Glaciers retreating along retrograde slopes (that is, the bed elevation drops in the inland direction) are potentially unstable, while subglacial ridges slow down the glacial retreat.

A Flexible Diet is Key to Antarctic Penguin Survival, Study Finds
Forbes, 2019-12-12
Antarctica is home to a myriad of penguin species including the emperor penguin, gentoo penguin, and chinstrap penguin. A gentoo penguin leaps off of an ice floe and into Mikkelsen Harbor in the Antarctic Peninsula. Gentoo and chinstap penguins are closely related, and both reside on the Antarctic Peninsula, Falkland Islands, and South Georgia.

The unique structural features of carbonmonoxy hemoglobin from the sub-Antarctic fish Eleginops maclovinus
Nature, 2019-12-12
Here, we report the crystal structure of a carbonmonoxy form of the Hb isolated from the sub-Antarctic notothenioid fish Eleginops maclovinus characterised by either rare or unique features. In particular, the distal site of the α chain results to be very unusual since the distal His is displaced from its canonical position. This displacement …

Firefighters to try first all-women Antarctic crossing
BBC, 2019-12-11
They call themselves the Antarctic Fire Angels and are preparing for the most gruelling challenge of their lives. Three firefighters from south Wales and three from London will take on a 70-day trek across Antarctica on a route never completed by an all-women team before. They said they wanted to do something historic – to show what women are …

Chile combs Antarctic for missing plane with 38 aboard
Houston Chronicle, 2019-12-11
PUNTA ARENAS, Chile (AP) — Search crews are combing the Antarctic for a Chilean military transport plane carrying 38 people that vanished en route to a base on the frozen continent and will tirelessly press ahead as the hunt gains widening international support, officials said Tuesday. Gen. Eduardo Mosqueira said Uruguay, Argentina …

Chile military plane crashes near Antarctic with 38 on board, hopes of finding survivors
Reuters on MSN.com, 2019-12-10
Chile’s Air Force said on Tuesday one of its cargo planes had crashed with 38 people on board after going missing for more than 12 hours, and said that a rescue team was searching for possible survivors.

The Antarctic: Study provides data about the structure of the icy continent
Phys.org, 2019-12-09
The Antarctic is one of the parts of Earth that we know the least about. Due to the massive ice shield, the collection of geophysical information on site is extremely difficult and expensive. Satellite data from the European Space Agency (ESA) has now been used as the basis for new insights on the deep structure of the continent. Scientists …

Antarctic Explorers’ Brains Shrunk During a 14-Month Polar Expedition
Gizmodo, 2019-12-09
Spending over a year in the bleak desolation that is Antarctica might change your brain for the worse, according to new research out this month. It seems to show that polar explorers who lived for 14 months at an Antarctica research station experienced brain shrinkage, likely as a result of their isolation and boredom. But the effects on their …

High-precision map of Antarctic ice sheet bed topography
Science Daily, 2019-12-12
The new Antarctic bed topography product was constructed using ice thickness data from 19 different research institutes dating back to 1967, encompassing nearly a million line-miles of radar soundings. In addition, BedMachine’s creators utilized ice shelf bathymetry measurements from NASA’s Operation IceBridge campaigns, as well as ice flow …

Research reveals past rapid Antarctic ice loss due to ocean warming
Phys.org, 2019-12-06
New research from the University of Otago has found the sensitive West Antarctic Ice Sheet collapsed during a warming period just over a million years ago when atmospheric carbon dioxide levels were lower than today. Using biomarkers to reconstruct past ocean temperatures, and through ice sheet computer models, the study published in Quaternary …

High-precision map of Antarctic ice sheet bed topography
Science Daily, 2019-12-12
The new Antarctic bed topography product was constructed using ice thickness data from 19 different research institutes dating back to 1967, encompassing nearly a million line-miles of radar soundings. In addition, BedMachine’s creators utilized ice shelf bathymetry measurements from NASA’s Operation IceBridge campaigns, as well as ice flow …

Antarctic Explorers’ Brains Shrunk During a 14-Month Polar Expedition
Gizmodo, 2019-12-09
Spending over a year in the bleak desolation that is Antarctica might change your brain for the worse, according to new research out this month. It seems to show that polar explorers who lived for 14 months at an Antarctica research station experienced brain shrinkage, likely as a result of their isolation and boredom. But the effects on their …

Studies highlight fragility of Antarctic ecosystems
Phys.org, 2019-12-02
Two studies published in a special issue of the journal Science Advances this week highlight the fragility of the Antarctic and its ecosystems in the lead up to the UNFCCC COP25 meeting in Madrid next week. The first study, involving scientists from British Antarctic Survey (BAS), explores the integration of climate change considerations in the …

The Antarctic: Data about the structure of the icy continent
Science Daily, 2019-12-09
Satellite data from the European Space Agency (ESA) has now been used as the basis for new insights on the deep structure of the continent Antarctica. The Antarctic is one of the parts of earth that we know the least about. Due to the massive ice shield, the collection of geophysical information on site is extremely difficult and expensive.

Study reveals climate change impact on Antarctic penguins
Phys.org, 2019-12-04
Antarctic penguins have been on the forefront of climate change, experiencing massive changes to their natural habitat as the world’s temperatures and human activity in the region have increased. Now, new research has revealed how penguins have dealt with more than a century of human impacts in Antarctica and why some species are winners or …

Urgent search for Antarctic plane with 38 people that disappeared off radar
YAHOO!, 2019-12-11
The Chilean Military deployed a fleet of ships and aircraft to aid the search for a C-130 Hercules aircraft that was lost en route to Antarctica with 38 passengers and crew members aboard.

Dinosaur discovery: Antarctic clues shows what REALLY wiped out the dinosaurs
Express, 2019-12-12
The dinosaurs’ reign on Earth was brought to an abrupt end 66 million years ago when a huge asteroid measuring up to 10 miles wide came crashing into the Yucatan Peninsula. Or so it was thought. New research which analyses sea shells in Antarctica now suggests the end of the dinosaurs was happening long before the major space rock collided …

Antarctic ice sheets could be at greater risk of melting than previously thought
Phys.org, 2019-12-02
Heat from the landmass beneath the Antarctic ice sheet is a major contributor to the way that glaciers melt and flow—and their impact on potential sea level rise. Hotter conditions allow meltwater to lubricate the base of the glacier, accelerating its movement and the rate of ice loss. However, because of the environmental, logistical and …

UCI-led team releases high-precision map of Antarctic ice sheet bed topography
EurekAlert!, 2019-12-12
The new Antarctic bed topography product was constructed using ice thickness data from 19 different research institutes dating back to 1967, encompassing nearly a million line-miles of radar soundings. In addition, BedMachine’s creators utilized ice shelf bathymetry measurements from NASA’s Operation IceBridge campaigns, as well as ice flow …