• Tue. Oct 26th, 2021

Thaw in Antarctica could set off chain reactions and cause monsoon rains on the ice sheet, study finds

Byeditorial

May 17, 2021

(CNN) – In an increasingly warmer climate, domino effects or chain reactions could cause alterations in weather patterns around the world as a result of the melting of the Antarctic ice sheet, according to a new study.

The study, published in the Nature Geoscience journal, has found that as the Earth continues to warm, the land under the Antarctic ice sheet will be more exposed. As a result of that process, wind patterns will change and precipitation will increase over Antarctica, which could trigger processes that accelerate ice loss.

“We found that the retreat of the ice sheet, exposing previously ice-covered areas, causes a large increase in precipitation, which through a feedback mechanism dramatically warms the ocean,” Catherine Bradshaw, lead scientist at CNN, told CNN. the UK Met Office and Professor at the University of Exeter.

Greenland thaw threatens sea level 0:53

“This feedback mechanism could trigger additional processes that accelerate ice loss.”

The joint study is based on the combination of climate models and data comparisons from the Middle Miocene epoch (13-17 million years ago).

Why are we interested in something that happened more than 13 million years ago? Because carbon dioxide levels and global temperatures during the Middle Miocene were similar to what the Earth is predicted to reach at the end of this century.

When it rains, it thunders

“With the great Antarctic ice sheet like we have today, the prevailing winds are known as katabatic winds, and they go from land to sea,” Bradshaw told CNN. «They originate in the ice sheet, in a very high place, very cold and very dry; in fact, Antarctica only receives a few inches of snow a year and is so dry that it is classified as a desert.

Bradshaw warns that if Antarctica continues to warm, those winds could reverse and blow from the cooler sea to warmer and drier land. This would generate the same results that we see in daily sea breezes and seasonal monsoon winds that occur around the world.

A monsoon is simply a seasonal reversal of wind direction that results in changes in precipitation for a specific region of the planet. For Antarctica, this means increased rainfall.

Bradshaw warns that if Antarctica continues to warm, those winds could reverse and blow from the cooler sea onto warmer and drier land. This would generate the same results that we see in daily sea breezes and seasonal monsoon winds that occur around the world.

A monsoon is simply a seasonal reversal of wind direction that results in changes in precipitation for a specific region of the planet. For Antarctica, this means increased rainfall.

‘The surface of the Antarctic ice sheet is very bright, reflecting 50-80% of the sunlight that falls on it. When the ice sheet recedes, exposing the darker Earth’s surface below, this soil is much less reflective and therefore absorbs more sunlight, thus heating up, ”Bradshaw told CNN.

Bradshaw explained that the ice-free soil on the coast heats up more than the surrounding sea surface, which in turn causes the change in wind direction. Like the ocean breezes Florida experiences, these winds can bring in moisture from the surrounding ocean that can dramatically increase rainfall.

“What happens to an ice sheet when precipitation increases depends on where the rain falls and whether it is cold enough to fall as snow rather than rain,” explains Bradshaw.

‘If temperatures are warm enough for moisture to rain down on the ice-free zone, this could trigger processes that can accelerate ice loss. Conversely, if temperatures are cold enough for moisture to fall as snow onto the ice sheet, this can cause ice to grow. ‘

As the Earth continues to warm, scientists could learn from the world’s monsoon regions about how to avoid a collapse of the Antarctic ice sheet. While this may sound a bit far-fetched, this new research shows that this may have happened in the past, when the Antarctic ice sheet was even more unstable.

“Essentially, if more land is exposed in Antarctica, it becomes more difficult for a large ice sheet to reform, and without the influence of (favorable) orbital positions in the Middle Miocene, perhaps the ice sheet would have collapsed in that moment, “he said Bradshaw in a press release.

Although the study suggests that the Antarctic ice sheet was able to move back and forth across the continent during the Middle Miocene, Dr. Bradshaw stresses that conditions today are not identical to those millions of years ago.

“It is important to emphasize that there were many important processes that were not included in our study and that, based on our findings, require additional research to establish exactly what the implications are for the future,” Bradshaw told CNN. “That is the work that I intend to do next, but have not started yet.”

Walking on ice

The increase in rainfall on the Antarctic continent not only has local but also global repercussions, since these new rains would cause more fresh water to end up in the surrounding oceans, in turn causing the sea level to rise.

“The rain ends up going back into the sea, and because it is fresh water and not salt water, it is less dense than the sea water that it goes to,” Bradshaw explained to CNN. “This means that it can form a layer on the surface instead of sinking and circular.”

This is important because essentially a separation point has now been created between the deep ocean and the ocean surface, causing the deep waters warm.

“Since much of the West Antarctic ice sheet, in particular, is below the sea surface, warmer waters can interact with the ice sheet from below,” said Bradshaw.

This small lake was formed by the thaw. In the background, the ice sheets on a hill next to the Comandante Ferraz station, on January 5, 2020, on King George Island, Antarctica.

‘If the surface of the ice sheet is melting, it can form meltwater lakes to which rain can add. Meltwater lakes tend to be blue rather than white, making them darker than the ice below and thus absorbing more sunlight, thus heating them up. ‘

This can create a ripple effect where these darker, warmer waters could cause the ice sheet to melt from the inside out. So the worst case scenario now is that the ice sheet not only melts from within, but also shrinks on the coast.

“Near the coast, the ice flows faster in ice currents, glaciers and ice shelves and is lost to the ocean as meltwater or icebergs,” Bradshaw told CNN. “Without new snowfall to replace the ice that is constantly being lost, the ice sheet will lose mass.”

Sea level would rise 90 centimeters by 2100 0:59

Although this study focused primarily on Antarctica, there have also been notable changes in ocean temperatures and salinity not only in the southern hemisphere, but also in the northern hemisphere, due to the melting of the ice. Greenland ice sheet.

This dramatic melting of the world’s ice sheets could lead to dramatic changes in weather patterns. The degree of stability or instability of the Antarctic ice sheet has not yet been accurately determined. However, one thing is certain and that is that the ice is in constant motion.

–CNN meteorologist Haley Brink contributed to this report.

One thought on “Thaw in Antarctica could set off chain reactions and cause monsoon rains on the ice sheet, study finds”
  1. editorial says:

    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/35614
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/45450
    https://pagalguy.com/discussions/update-pasatiempos-juegos-de-palabras-hack-mod-apk-cheats-generator-ios-android-99003016282096
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/8003
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/24645
    https://pagalguy.com/discussions/new-h-find-the-differences-1-lite-hack-mod-apk-cheats-generator-ios-android-96049819219651
    https://pagalguy.com/discussions/new-heroes-m4gic-war-hack-mod-apk-cheats-generator-ios-android-96042906571266
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/39110
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/43064
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/14313
    https://rhs.instructure.com/eportfolios/16916/Home/NEW_Merge_Numbers_Plus_Hack_Mod_APK_Get_Unlimited_Coins_Cheats_Generator_IOS__Android
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/15639
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/8172
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/26621
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/49844
    https://pagalguy.com/discussions/hack-modern-mania-wrestling-hack-mod-apk-cheats-generator-ios-android-96042094466968
    https://rhs.instructure.com/eportfolios/16079/Home/CHEATS_Hackers__Join_the_Cyberwar_Hack_Mod_APK_Get_Unlimited_Coins_Cheats_Generator_IOS__Android
    https://pagalguy.com/discussions/new-dream-lands-hack-mod-apk-cheats-generator-ios-android-99024234864419
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/24174
    https://pagalguy.com/discussions/new-hack-einfach-wurfel-hack-mod-apk-cheats-generator-ios-android-99030473773258
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/15045
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/21027
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/49553
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/32815
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/30793
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/38196
    https://pagalguy.com/discussions/update-word-search-hack-mod-apk-cheats-generator-ios-android-99009427912946
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/25871
    https://pagalguy.com/discussions/new-save-them-all-hack-mod-apk-cheats-generator-ios-android-99013680358149
    https://pagalguy.com/discussions/new-hack-anime-story-hack-mod-apk-cheats-generator-ios-android-99029575714679
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/11477
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/42959
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/31538
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/12429
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/23636
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/20290
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/19027
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/16440
    https://pagalguy.com/discussions/new-hack-virtual-gym-fighting-hack-mod-apk-cheats-generator-ios-android-96077822247359
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/8859
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/44618
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/1582
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/34948
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/16900
    https://pagalguy.com/discussions/new-hack-barbie-trucco-moda-hack-mod-apk-cheats-generator-ios-android-99007609502327
    https://pagalguy.com/discussions/new-rovercraft-space-racing-hack-mod-apk-cheats-generator-ios-android-96079278919010
    https://pagalguy.com/discussions/new-hack-cliffhanger-chat-stories-hack-mod-apk-cheats-generator-ios-android-96073731953683
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/25873
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/18005
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/17503
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/40123
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/30461
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/32574
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/26257
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/8309
    https://pagalguy.com/discussions/new-gunship-iii-combat-flight-simulator-hack-mod-apk-cheats-generator-ios-android-96051572481973
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/27006
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/17921
    https://pagalguy.com/discussions/update-ultraman-rumble-hack-mod-apk-cheats-generator-ios-android-99028740594224
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/30612
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/3881
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/22632
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/40617
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/978
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/35173
    https://pagalguy.com/discussions/new-one-punch-man-hack-mod-apk-cheats-generator-ios-android-99024328564576
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/48666
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/45044
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/41769
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/16869
    https://rhs.instructure.com/eportfolios/15598/Home/NEW_Smartphone_Tycoon_2_Hack_Mod_APK_Get_Unlimited_Coins_Cheats_Generator_IOS__Android
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/7045
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/41524
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/37443
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/6598
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/1564
    https://pagalguy.com/discussions/new-hack-bubbles-the-cat-hack-mod-apk-cheats-generator-ios-android-99038415770992
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/18811
    https://pagalguy.com/discussions/hack-hack-mod-apk-cheats-generator-ios-android-99010020190618
    https://pagalguy.com/discussions/update-ete-campeur-fourgon-camion-simulateur-parking-3d-hack-mod-apk-cheats-generator-ios-android-99020027996338
    https://pagalguy.com/discussions/update-anadolu-bus-simulator-hack-mod-apk-cheats-generator-ios-android-96082182908077
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/28313
    https://pagalguy.com/discussions/new-flip-3d-hack-mod-apk-cheats-generator-ios-android-96305141528508
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/6773
    https://rhs.instructure.com/eportfolios/11782/Home/NEW_Slashing_Kungfu_Kata_Training_Hack_Mod_APK_Get_Unlimited_Coins_Cheats_Generator_IOS__Android
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/38098
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/8811
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/41212
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/23545
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/26683
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/1475
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/33058
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/36246
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/41940
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/21137
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/49736
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/5443
    https://pagalguy.com/discussions/hack-creatures-of-olympus-hack-mod-apk-cheats-generator-ios-android-96052057663741
    https://pagalguy.com/discussions/new-hack-yada-hack-mod-apk-cheats-generator-ios-android-99004321721834
    https://dev.azure.com/patrickgeremy/geremypatrick/_workitems/edit/32705

Comments are closed.