Impact of Greenland orography on the Atlantic Meridional Overturning Circulation

被引：10

作者：

Davini, P. ^{[1
]}

von Hardenberg, J. ^{[1
]}

Filippi, L. ^{[1
,2
]}

Provenzale, A. ^{[1
]}

机构：

[1] ISAC CNR, Inst Atmospher Sci & Climate, Turin, Italy

[2] Politecn Torino, Turin, Italy

来源：

GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 03期

关键词：

Greenland orography; North Atlantic Circulation; AMOC; HEMISPHERE WINTER CIRCULATION; COUPLED CLIMATE MODEL; ICE-SHEET; NORTH-ATLANTIC; THERMOHALINE CIRCULATION; ARCTIC-OCEAN; VARIABILITY; SYSTEM; EARTH;

D O I：

10.1002/2014GL062668

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We show that the absence of the Greenland ice sheet would have important consequences on the North Atlantic Ocean circulation, even without taking into account the effect of the freshwater input to the ocean from ice melting. These effects are investigated in a 600year long coupled ocean-atmosphere simulation with the high-resolution global climate model EC-Earth 3.0.1. Once a new equilibrium is established, a cooling of Eurasia and of the North Atlantic and a poleward shift of the subtropical jet are observed. These hemispheric changes are ascribed to a weakening of the Atlantic Meridional Overturning Circulation (AMOC) by about 12%. We attribute this slowdown to a reduction in salinity of the Arctic basin and to the related change of the mass and salt transport through the Fram Straita consequence of the new surface wind pattern over the lower orography. This idealized experiment illustrates the sensitivity of the AMOC to local surface winds.

引用

页码：871 / 879

页数：9

共 38 条

[1]

Amante C., 2009, ETOPO1 1 ARC MINUTE

[2] A Revised Hydrology for the ECMWF Model: Verification from Field Site to Terrestrial Water Storage and Impact in the Integrated Forecast System [J].