Scientists from the CNRS, the CNES, the IRD, the Sorbonne Université, the University of Toulouse III – Paul Sabatier and their Australian colleagues *, with the support of the IPEV, have presented a comprehensive analysis of the development of temperatures in the Southern Ocean over the last 25 years. The research team has come to the conclusion that the slight cooling observed on the surface hides a rapid and significant warming of the water to a depth of up to 800 meters.
The study points to large changes in the polar ice cap, with temperatures rising by 0.04 ° C per decade, which could have serious consequences for the Antarctic ice. Warm water also rises rapidly to the surface at a rate of 39 meters per decade; H. Three to ten times higher than previously assumed.
Published in Nature communication On January 21, 2021, these results were achieved thanks to unique data collected on board the French supply ship L & # 39; Astrolabe in Antarctica over the past 25 years. This is the longest series of temperature records in the Southern Ocean from north to south.
* – The laboratories and institutions involved in this study are the Laboratoire d & # 39; océanographie et du Klimat: Experiments and Approaches (CNRS / IRD / MNHN / Sorbonne Université), part of the Pierre Simon Laplace Institute; The Laboratoire d & # 39; études en géophysique et océanographie Spatiales (CNRS / CNES / IRD / University of Toulouse III – Paul Sabatier) and the Commonwealth Scientific and Industrial Research Organization (CSIRO; Australia). The SURVOSTRAL observation program was funded by IPEV and CNRS.
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Source of the story:
- Matthis Auger, Rosemary Tomorrow, Elodie Kestenare, Jean-Baptiste Sallée, Rebecca Cowley. In-situ temperature trends in the Southern Ocean over 25 years result from the interannual variability. Nature communication2021; 12 (1) DOI: 10.1038 / s41467-020-20781-1
Quote this page::
CNRS. "Antarctica: The ocean cools down on the surface, but warms up below." ScienceDaily. ScienceDaily, January 21, 2021.
CNRS. (2021, January 21). Antarctica: The ocean cools down on the surface, but warms up below. ScienceDaily. Retrieved January 22, 2021 from www.sciencedaily.com/releases/2021/01/210121131818.htm
CNRS. "Antarctica: The ocean cools down on the surface, but warms up below." ScienceDaily. www.sciencedaily.com/releases/2021/01/210121131818.htm (accessed January 22, 2021).