Impact of heterogeneous sulfate formation at mineral dust surfaces on aerosol loads and radiative forcing in the Goddard Institute for Space Studies general circulation model

2005 ◽  
Vol 110 (D17) ◽  
Author(s):  
S. E. Bauer
Keyword(s):  
General Circulation Model ◽  
Radiative Forcing ◽  
General Circulation ◽  
Mineral Dust ◽  
Circulation Model ◽  
Sulfate Formation ◽  
Goddard Institute

INTERANNUAL VARIABILITY OF MINERAL DUST SIMULATED WITH A GENERAL CIRCULATION MODEL

2001 ◽  
Vol 32 ◽  
pp. 125-126
Author(s):  
C. TIMMRECK ◽  
M. SCHULZ ◽  
Y. BALKANSKI ◽  
J. FEICHTER
Keyword(s):  
Interannual Variability ◽  
General Circulation Model ◽  
General Circulation ◽  
Mineral Dust ◽  
Circulation Model

scholarly journals Preindustrial-to-present-day radiative forcing by tropospheric ozone from improved simulations with the GISS chemistry-climate GCM

2003 ◽  
Vol 3 (5) ◽  
pp. 1675-1702 ◽  
Author(s):  
D. T. Shindell ◽  
G. Faluvegi ◽  
N. Bell
Keyword(s):  
Tropospheric Ozone ◽  
Radiative Forcing ◽  
General Circulation ◽  
Climate Model ◽  
Circulation Model ◽  
Tropospheric Chemistry ◽  
True Value ◽  
Tropopause Region ◽  
Dynamics Simulations ◽  
Goddard Institute

Abstract. Improved estimates of the radiative forcing from tropospheric ozone increases since the preindustrial have been calculated with the tropospheric chemistry model used at the Goddard Institute for Space Studies (GISS) within the GISS general circulation model (GCM). The chemistry in this model has been expanded to include simplified representations of peroxyacetylnitrates and non-methane hydrocarbons in addition to background NOx-HOx-Ox-CO-CH4 chemistry. The GCM has improved resolution and physics in the boundary layer, improved resolution near the tropopause, and now contains a full representation of stratospheric dynamics. Simulations of present-day conditions show that this coupled chemistry-climate model is better able to reproduce observed tropospheric ozone, especially in the tropopause region, which is critical to climate forcing. Comparison with preindustrial simulations gives a global annual average radiative forcing due to tropospheric ozone increases of 0.30 W/m2 with standard assumptions for preindustrial emissions. Locally, the forcing reaches more than 0.8 W/m2 in parts of the northern subtropics during spring and summer, and is more than 0.6 W/m2 through nearly all the Northern subtropics and mid-latitudes during summer. An alternative preindustrial simulation with soil NOx emissions reduced by two-thirds and emissions of isoprene, paraffins and alkenes from vegetation increased by 50% gives a forcing of 0.33 W/m2. Given the large uncertainties in preindustrial ozone amounts, the true value may lie well outside this range.

Response of an atmospheric general circulation model to radiative forcing of tropical clouds

1994 ◽  
Vol 99 (D10) ◽  
pp. 20829 ◽  
Author(s):  
Steven C. Sherwood ◽  
V. Ramanathan ◽  
Tim P. Barnett ◽  
Mary K. Tyree ◽  
Erich Roeckner
Keyword(s):  
General Circulation Model ◽  
Radiative Forcing ◽  
General Circulation ◽  
Atmospheric General Circulation Model ◽  
Circulation Model ◽  
Atmospheric General Circulation ◽  
Tropical Clouds
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