A Naval Officer’s Old Historical Photographs Show What They Encountered Whilst Exploring Antarctica

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Continue Reading A Naval Officer’s Old Historical Photographs Show What They Encountered Whilst Exploring Antarctica

Claim: Antarctica’s Ice Shelves Could be Melting Faster Than We thought

[First paragraph abridged -cr:

A new model… suggests that… may be… could eventually… sea level rise.]

IMAGE: PRIOR TO DEVELOPING THIS MODEL, THE TEAM HAS TRAVELED TO ANTARCTICA TO MAKE MEASUREMENTS OF TEMPERATURE AND SALINITY OF THE WATER AND ICE. THEIR NEW MODEL SHOWS THAT AN OFTEN-OVERLOOKED NARROW OCEAN CURRENT ALONG THE ANTARCTIC COAST CAN PLAY A LARGE ROLE IN HOW HEAT GETS TRAPPED BENEATH THE ICE SHELVES, MELTING THEM FROM BELOW. view more CREDIT: COURTESY OF ANDY THOMPSON

A new model developed by Caltech and JPL researchers suggests that Antarctica’s ice shelves may be melting at an accelerated rate, which could eventually contribute to more rapid sea level rise. The model accounts for an often-overlooked narrow ocean current along the Antarctic coast and simulates how rapidly flowing freshwater, melted from the ice shelves, can trap dense warm ocean water at the base of the ice, causing it to warm and melt even more.

The study was conducted in the laboratory of Andy Thompson, professor of environmental science and engineering, and appears in the journal Science Advances on August 12.

Ice shelves are outcroppings of the Antarctic ice sheet, found where the ice juts out from land and floats on top of the ocean. The shelves, which are each several hundred meters thick, act as a protective buffer for the mainland ice, keeping the whole ice sheet from flowing into the ocean (which would dramatically raise global sea levels). However, a warming atmosphere and warming oceans caused by climate change are increasing the speed at which these ice shelves are melting, threatening their ability to hold back the flow of the ice sheet into the ocean.  

“If this mechanism that we’ve been studying is active in the real world, it may mean that ice shelf melt rates are 20 to 40 percent higher than the predictions in global climate models, which typically cannot simulate these strong currents near the Antarctic coast,” Thompson says.

In this study, led by senior research scientist Mar Flexas, the researchers focused on one area of Antarctica: the West Antarctic Peninsula (WAP). Antarctica is roughly shaped like a disk, except where the WAP protrudes out of the high polar latitudes and into lower, warmer latitudes. It is here that Antarctica sees the most dramatic changes due to climate change. The team has previously deployed autonomous vehicles in this region, and scientists have used data from instrumented elephant seals to measure temperature and salinity in the water and ice. 

The team’s model takes into account the narrow Antarctic Coastal Current that runs counterclockwise around the entire Antarctic continent, a current which many climate models do not include because it is so small. 

“Large global climate models don’t include this coastal current, because it’s very narrow—only about 20 kilometers wide, while most climate models only capture currents that are 100 kilometers across or larger,” Flexas explains. “So, there is a potential for those models to not represent future melt rates very accurately.”

The model illustrates how freshwater that melts from ice at the WAP is carried by the coastal current and transported around the continent. The less-dense freshwater moves along quickly near the surface of the ocean and traps relatively warm ocean saltwater against the underside of the ice shelves. This then causes the ice shelves to melt from below. In this way, increased meltwater at the WAP can propagate climate warming via the Coastal Current, which in turn can also escalate melting even at West Antarctic ice shelves thousands of kilometers away from the peninsula. This remote warming mechanism may be part of the reason that the loss of volume from West Antarctic ice shelves has accelerated in recent decades.

“There are aspects of the climate system that we are still discovering,” Thompson says. “As we’ve made progress in our ability to model interactions between the ocean, ice shelves, and atmosphere, we’re able to make more accurate predictions with better constraints on uncertainty. We may need to revisit some of the predictions of sea level rise in the next decades or century—that’s work that we’ll do going forward.”

The paper is titled “Antarctic Peninsula warming triggers enhanced basal melt rates throughout West Antarctica.” In addition to Flexas and Thompson, additional coauthors are Michael Schodlok and Hong Zhang of JPL, and Kevin Speer of Florida State University. Funding was provided by the National Science Foundation, the NASA Physical Oceanography program and Cryospheric Sciences program, NASA’s Internal Research and Technology Development program (Earth 2050 project), JPL, and Caltech. Caltech manages JPL for NASA.

JOURNAL

Science Advances

DOI

10.1126/sciadv.abj9134 

ARTICLE TITLE

Antarctic Peninsula warming triggers enhanced basal melt rates throughout West Antarctica

ARTICLE PUBLICATION DATE

12-Aug-2022

Article Rating

Continue Reading Claim: Antarctica’s Ice Shelves Could be Melting Faster Than We thought

Admiral Byrd Discovered New Land in Antarctica that Nobody Ever Talks about – Published Aug 12, 2022

Admiral Byrd Discovered New Land in Antarctica that Nobody Ever Talks about – Published Aug 12, 2022XandrewXMirrored from https://www.bitchute.com/video/JiMOf1BP3syr/ Keywordsantarcticacuriousprovocativeadmiral byrdnew landFREE email alerts of the most important BANNED videos in the worldGet FREE email alerts of the most important BANNED videos in the world that are usually blacklisted by YouTube, Facebook, Google, Twitter and Vimeo. Watch documentaries the techno-fascists don’t want you to know even exist. Join the free Brighteon email newsletter. Unsubscribe at any time. 100% privacy protected.Your privacy is protected.

Continue Reading Admiral Byrd Discovered New Land in Antarctica that Nobody Ever Talks about – Published Aug 12, 2022

The light under the Antarctic ice! – What did the explorers find in Antarctica?

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Continue Reading The light under the Antarctic ice! – What did the explorers find in Antarctica?

Antarctica’s ice shelves may be melting faster than anticipated: study

Antarctica’s ice shelves may be melting much faster than scientists previously anticipated — a phenomenon that could ultimately accelerate sea level rise, a new study has found.

Researchers at the California Institute of Technology and NASA’s Jet Propulsion Laboratory came to this conclusion by deploying a new model showing how dense, warm ocean water can get trapped along Antarctica’s icy coast and speed up melting. 

Their model, detailed in Science Advances on Friday, homes in on a “narrow ocean current” adjacent to the coast that the authors described as “often-overlooked.”

Using the model, they simulated how rapidly flowing freshwater — melted from the ice shelves — can trap the warm ocean current at the base of the ice and thereby hasten the melting process.

“If this mechanism that we’ve been studying is active in the real world, it may mean that ice shelf melt rates are 20 to 40 percent higher than the predictions in global climate models,” co-author Andy Thompson, a professor of environmental science and engineering at Caltech, said in a statement.

Ice shelves are outcroppings of the Antarctic ice sheet, located where ice juts out from the land and floats on top of the ocean.

These shelves, which can be hundreds of meters thick, serve as a protective buffer for mainland ice — preventing the entire ice sheet from flowing into the ocean, according to the researchers.

As both the atmosphere and oceans warm due to a changing climate, the speed at which ice shelves are melting is increasing, the authors warned. Such conditions also therefore jeopardize their ability to block the flow of the ice sheet into the ocean, they added.

The study’s release comes amid a high-traffic week for research on the Earth’s poles.

On the opposite side of the planet, scientists showed on Thursday that the Arctic, too, is warming at a more rapid pace than previously assumed.

Yet another research team revealed on Wednesday how humans could potentially thwart the worst impacts of climate change on the East Antarctic Ice Sheet.

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The Caltech-NASA researchers, however, focused their study on the West Antarctic Peninsula. This icy mass protrudes out of the higher polar latitudes and into lower, warmer altitudes, and has undergone the most dramatic changes due to climate change, they explained.

“There are aspects of the climate system that we are still discovering,” Thompson said, noting that improvements in modeling ocean, ice and atmosphere interactions have helped scientists make more accurate predictions, with less uncertainty.

“We may need to revisit some of the predictions of sea level rise in the next decades or century — that’s work that we’ll do going forward,” he added.

Continue Reading Antarctica’s ice shelves may be melting faster than anticipated: study

Antarctica’s ice shelves could be melting up to 40% FASTER than we thought

Antarctica’s ice shelves could be melting up to 40% FASTER than we thought thanks to coastal ocean currents, study warnsA new climate model has identified a cause of Antarctica’s melting ice shelvesA narrow current around Antarctic causes warm water to melt these ice shelvesModel suggests ice shelf melt rates are up to 40% higher than prior predictionsBy Jonathan Chadwick For Mailonline Published: 14:00 EDT, 12 August 2022 | Updated: 14:00 EDT, 12 August 2022

Continue Reading Antarctica’s ice shelves could be melting up to 40% FASTER than we thought

⁣(Anthony Powell’s) 24 HOUR SUN IN ANTARCTICA DISCREDITED

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The Arctic Midnight Sun VS LACK OF The Antarctica Midnight Sun

The Arctic Midnight Sun VS LACK OF The Antarctica Midnight SunSources used:The Arctic Midnight Sunhttps://www.bitchute.com/video/wGZeot5G1Onc/ There is NO Midnight Sun in Antarcticahttps://www.bitchute.com/video/cCgnuuA2Ozm8/ SOUTH POLE DEBUNKEDhttps://www.bitchute.com/video/DxwgiDvWGJ1g/

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