Antarctica: the ocean cools at the surface but warms up at depth

January 21, 2021

Scientists from the CNRS, CNES, IRD, Sorbonne Université, l'Université Toulouse III - Paul Sabatier and their Australian colleagues*, with the support of the IPEV, have provided a comprehensive analysis on the evolution of Southern Ocean temperatures over the last 25 years. The research team has concluded that the slight cooling observed at the surface hides a rapid and marked warming of the waters, to a depth of up to 800 metres. The study points to major changes around the polar ice cap where temperatures are increasing by 0.04°C per decade, which could have serious consequences for Antarctic ice. Warm water is also rising rapidly to the surface, at a rate of 39 metres per decade, i.e. between three and ten times more than previously estimated. Published in Nature Communications on 21 January 2021, these results were obtained thanks to unique data acquired over the past 25 years on board the French Antarctic resupply vessel L'Astrolabe. This is the longest series of temperature records in the Southern Ocean covering north to south.
-end-
*- The laboratories and institutions involved in this study are the Laboratoire d'océanographie et du climat : expérimentations et approches numériques (CNRS/IRD/MNHN/ Sorbonne Université), part of the l'Institut Pierre Simon Laplace; le Laboratoire d'études en géophysique et océanographie spatiales (CNRS/CNES/IRD/Université Toulouse III - Paul Sabatier) and the Commonwealth Scientific and Industrial Research Organisation (CSIRO; Australia). The SURVOSTRAL observation programme was funded by IPEV and the CNRS.

CNRS

Related Temperatures Articles from Brightsurf:

CMIP6 adds more value in simulating extreme temperatures in China
CMIP6 adds more value in simulating extreme temperatures in China.

High temperatures threaten the survival of insects
Insects have difficulties handling the higher temperatures brought on by climate change, and might risk overheating.

Slinging ink, raising temperatures
You've heard that they can sag with age, perpetuate the name of a regrettable ex, or reveal an embarrassing inability to spell.

Warming temperatures are driving arctic greening
As Arctic summers warm, Earth's northern landscapes are changing. Using satellite images to track global tundra ecosystems over decades, a new study found the region has become greener, as warmer air and soil temperatures lead to increased plant growth.

A quantum thermometer to measure the coldest temperatures in the universe
The physicists' proposed thermometer is based on quantum entanglement and can accurately measure temperatures a billion times colder than those in outer space.

Warmer temperatures slow COVID-19 transmission, but not by much
Researchers at Mount Auburn Hospital looked at the impact of temperature, precipitation, and UV index on COVID-19 case rates in the United States during the spring months of 2020.

New 'refrigerator' super-cools molecules to nanokelvin temperatures
MIT physicists have found a way to cool molecules of sodium lithium down to 200 billionths of a Kelvin, just a hair above absolute zero.

An alloy that retains its memory at high temperatures
Even after the hundredth time the material returns to its original shape when heated.

New catalysts remove NOx pollutants at lower temperatures
Scientists from Tokyo Metropolitan University have developed a low-temperature catalyst for removing NOx gas from industrial exhaust using ammonia.

Cold temperatures linked to high status
Researchers have discovered that people associate cold temperatures with luxury items, which is important for companies that are trying to promote products that convey high status.

Read More: Temperatures News and Temperatures Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.