Response of the Hydrological Cycle to Orbital and Greenhouse Gas Forcing.

Khon, Vyacheslav, Park, Wonsun, Latif, Mojib, Mokhov, I. I. and Schneider, Birgit (2010) Response of the Hydrological Cycle to Orbital and Greenhouse Gas Forcing. Open Access Geophysical Research Letters, 37 . L19705. DOI 10.1029/2010GL044377.

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Abstract

The sensitivity of the hydrological cycle to changes in orbital forcing and atmospheric greenhouse gas (GHG) concentrations is assessed using a fully coupled atmosphere-ocean-sea ice general circulation model (Kiel Climate Model). An orbitally-induced intensification of the summer monsoon circulation during the Holocene and Eemian drives enhanced water vapor advection into the Northern Hemisphere, thereby enhancing the rate of water vapor changes by about 30% relative to the rate given by the Clausius-Clapeyron Equation, assuming constant relative humidity. Orbitally-induced changes in hemispheric-mean precipitation are fully attributed to inter-hemispheric water vapor exchange in contrast to a GHG forced warming, where enhanced precipitation is caused by increased both the moisture advection and evaporation. When considering the future climate on millennial time scales, both forcings combined are expected to exert a strong effect.

Document Type: Article
Keywords: Climatology; atmospheric greenhouse gas; GHG; Kiel Climate Model;
Research affiliation: Kiel University
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
OceanRep > SFB 754
OceanRep > SFB 754 > A1
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2010GL044377
ISSN: 0094-8276
Projects: SFB754
Expeditions/Models/Experiments:
Date Deposited: 06 Sep 2010 13:11
Last Modified: 20 Jun 2017 13:12
URI: http://oceanrep.geomar.de/id/eprint/8871

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