Modeling atmospheric stable water isotopes and the potential for constraining cloud processes and stratosphere-troposphere water exchange

Stable water isotope tracers (HDO and (H2O)-O-18) are incorporated into the ModelE version of the Goddard Institute for Space Studies Atmospheric (GISS) General Circulation Model (GCM). Details of the moist convective parameterisation, cloud phase, background ozone, isotope kinetics and vertical res...

Full description

Bibliographic Details
Published in:Journal of Geophysical Research
Main Authors: Schmidt, GA, Hoffmann, G, Shindell, DT, Hu, YY
Other Authors: Schmidt, GA (reprint author), NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA., NASA, Goddard Inst Space Studies, New York, NY 10025 USA., Columbia Univ, Ctr Climate Syst Res, New York, NY 10025 USA., Climat & Environm, Lab Sci, Orme Des Merisiers, France., Peking Univ, Dept Atmospher Sci, Beijing 100871, Peoples R China., NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA.
Format: Journal/Newspaper
Language:English
Published: journal of geophysical research atmospheres 2005
Subjects:
GENERAL-CIRCULATION MODEL
TROPICAL TROPOPAUSE TEMPERATURES
HEAT-FLUX
VAPOR
TRANSPORT
CLIMATE
TRACERS
SIMULATION
ICE
DEUTERIUM
Antarc*
Antarctica
Online Access:https://hdl.handle.net/20.500.11897/253707
https://doi.org/10.1029/2005JD005790
Description
Summary:Stable water isotope tracers (HDO and (H2O)-O-18) are incorporated into the ModelE version of the Goddard Institute for Space Studies Atmospheric (GISS) General Circulation Model (GCM). Details of the moist convective parameterisation, cloud phase, background ozone, isotope kinetics and vertical resolution are varied and we examine their impacts, particularly in the upper troposphere (UT) and lower stratosphere. We find that isotopes in precipitation, except in Antarctica, are largely unaffected by these changes and thus are not a useful metric for evaluating model skill above the lower troposphere. Simulated isotopic entry values into the stratosphere over all experiments range between -750 and -600% for HDO, and -130 to -90% for (H2O)-O-18, demonstrating that the mixing processes simulated by the model can explain a significant part of the observed offset from pure Rayleigh distillation. Isotope fields are shown to be sensitive to the parameterisation of cloud physics and representation of UT processes and therefore may be useful in constraining modeled cloud physics and mechanisms of stratosphere-troposphere water vapour exchange. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000233355700004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Meteorology & Atmospheric Sciences SCI(E) 97 ARTICLE D21 null 110

Similar Items