La fonte des calottes glaciaires mesurée précisément par les satellites de la Nasa
Nathalie Mayer, Futura Sciences, 6 mai 2020
Le premier a été lancé en 2003, le second en 2018. Ce sont les satellites ICESat. Aujourd’hui, les données qu’ils ont fournies au fil des années aux chercheurs de la Nasa donnent l’image la plus précise dont nous disposions de l’évolution des calottes glaciaires au cours des 16 dernières années.
https://www.futura-sciences.com/planete/actualites/climatologie-fonte-calottes-glaciaires-mesuree-precisement-satellites-nasa-19846/
Climate change could reawaken Indian Ocean El Nino
University of Texas, Phys.org, 6 mai 2020
Global warming is approaching a tipping point that during this century could reawaken an ancient climate pattern similar to El Niño in the Indian Ocean, new research led by scientists from The University of Texas at Austin has found.
https://phys.org/news/2020-05-climate-reawaken-indian-ocean-el.html
Arctic ’shorefast’ sea ice threatened by climate change, study finds
Brown University, Phys.org, 4 mai 2020
For people who live in the Arctic, sea ice that forms along shorelines is a vital resource that connects isolated communities and provides access to hunting and fishing grounds. A new study by Brown University researchers found that climate change could significantly reduce this "shorefast ice" in communities across Northern Canada and Western Greenland.
https://phys.org/news/2020-05-arctic-shorefast-sea-ice-threatened.html
Campagnes océanographiques MAYOBS 13 du réseau de surveillance volcanologique et sismologique
Préfecture de Mayotte, 2 mai 2020
Dans le cadre des actions menées par les pouvoirs publics, pour mieux comprendre le phénomène sismovolcanique qui touche Mayotte depuis mai 2018, deux nouvelles campagnes en mer sont organisées au large de l’île début mai 2020
http://www.mayotte.gouv.fr/Actualites/Communiques-de-presse/Communique-de-presse-2020/Campagnes-oceanographiques-MAYOBS-13-du-reseau-de-surveillance-volcanologique-et-sismologique
Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes
Ben Smith, Helen A. Fricker, Alex S. Gardner, Brooke Medley, Johan Nilsson, Fernando S. Paolo, Nicholas Holschuh, Susheel Adusumilli, Kelly Brunt, Bea Csatho, Kaitlin Harbeck, Thorsten Markus, Thomas Neumann, Matthew R. Siegfried, H. Jay Zwally - Science, 30 avril 2020
Quantifying changes in Earth’s ice sheets, and identifying the climate drivers, is central to improving sea-level projections. We provide unified estimates of grounded and floating ice mass change from 2003 to 2019 using NASA’s ICESat and ICESat-2 satellite laser altimetry. Our data reveal patterns likely linked to competing climate processes : Ice loss from coastal Greenland (increased surface melt), Antarctic ice shelves (increased ocean melting), and Greenland and Antarctic outlet glaciers (dynamic response to ocean melting), was partially compensated by mass gains over ice sheet interiors (increased snow accumulation). Losses outpaced gains, with grounded-ice loss from Greenland (200 Gt a−1) and Antarctica (118 Gt a−1) contributing 14 mm to sea level. Mass lost from West Antarctica’s ice shelves accounted for over 30% of that region’s total.
https://science.sciencemag.org/content/early/2020/04/29/science.aaz5845