Sciences marines : recherche et développement

Abstrait

High-Resolution Ocean Fashions to Check the Footprint of Planktic Foraminifera

Steven Rhee

Fossils of marine microorganisms such as Planktic foraminifera are amongst the cornerstones of palaeoclimatological studies. It is regularly assumed that the proxies derived from their shells characterize ocean stipulations above the region the place they had been deposited. Planktic foraminifera, however, are carried with the aid of ocean currents and, relying on the existence characteristics of the species, doubtlessly comprise far-off ocean conditions. Here we use high-resolution ocean fashions to check the footprint of Planktic foraminifera and validate our technique with proxy analyses from two locations. Results exhibit that foraminifera, and for this reason recorded palaeoclimatic conditions,can also originate from areas up to a number of hundreds of kilometres away, reflecting an ocean nation considerably specific from the core site. In the Japanese equatorial areas and the western boundary contemporary extensions, the offset might also attain 1.5°C for species dwelling for a month and three °C for longer-living species.