The North Atlantic in the greenhouse - overturning response and sensitivities.

Schweckendiek, Ulf (2003) The North Atlantic in the greenhouse - overturning response and sensitivities. Open Access (PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 149 pp.

[img]
Preview
Text
240_Schweckendiek_2003_TheNorthAtlanticInThe_Hschri_pubid5558.pdf - Published Version
Available under License Creative Commons: Attribution 3.0.

Download (8Mb)

Abstract

The response of the thermohaline circulation (THC) in climate models on global warming scenarios differs fundamentally. To examine the role of the ocean component for this deviating behaviour,diagnosed fluxes from coupled greenhouse gas simulations are used to drive a regional model of the Atlantic Ocean. The results demonstrate, that the general response of the THC due to changes in atmospheric forcing is quite robust and insensitive to the improved representation of the ocean component. In order to test the crucial mechanisms for the evolution of the meridional overturning, sensitivity studies are by focussing on different combinations of surface fluxes are performed. The response indicates that the density in the Nordic Seas and subsequently the overflow waters determine trends and long-term variability of the overturning circulation, underlining the importance of that region for the THC. Deep water formation within the Labrador Sea, responsible for interannual to decadal variability is quite sensitive to anthropogenic changes in the surface fluxes, so that its convection eventually breaks down under surface warming and freshening.

Document Type: Thesis (PhD/ Doctoral thesis)
Thesis Advisor: Willebrand, Jürgen and Latif, Mojib
Additional Information: Tag der mündlichen Prüfung: 09.12.2003
Keywords: Atlantischer Ozean; Thermohaline Zirkulation; Treibhauseffekt; Zirkulationsmodell; Thermohaline Circulation; Overturning; Treibhausszenario; Conveyor; Ozeanmodell
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-OD Ocean Dynamics
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Refereed: No
Date Deposited: 16 Sep 2008 18:19
Last Modified: 13 Sep 2019 12:11
URI: http://oceanrep.geomar.de/id/eprint/2436

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...