Publication Abstracts

Grenfell et al. 2001

Grenfell, J.L., D.T. Shindell, D. Koch, and D. Rind, 2001: Chemistry-climate interactions in the Goddard Institute for Space Studies general circulation model: 2. New insights into modeling the pre-industrial atmosphere. J. Geophys. Res., 106, 33435-33451, doi:10.1029/2000JD000090.

We investigate the chemical (hydroxyl and ozone) and dynamical response to changing from present day to pre-industrial conditions in the GISS GCM. We identify three main improvements not included by many other works. Firstly, our model includes interactive cloud calculations. Secondly we reduce sulfate aerosol which impacts NOx partitioning hence Ox distributions. Thirdly we reduce sea surface temperatures and increase ocean ice coverage which impact water vapor and ground albedo respectively. Changing the ocean data (hence water vapor and ozone) produces a potentially important feedback between the Hadley circulation and convective cloud cover. Our present day run (run 1, control run) global mean OH value was 9.8×105 molecules/cm3. For our best estimate of pre-industrial conditions run (run 2) which featured modified chemical emissions, sulfate aerosol and sea surface temperatures / ocean ice, this value changed to 10.2×105 molecules/cm3. Reducing only the chemical emissions to pre-industrial levels in run 1 (run 3) resulted in this value increasing to 10.6×105 molecules/cm3. Reducing the sulfate in run 3 to pre-industrial levels (run 4) resulted in a small increase in global mean OH (10.7×105 molecules/cm3). Changing the ocean data in run 4 to pre-industrial levels (run 5) led to a reduction in this value to 10.3×105 molecules/cm3. Mean tropospheric ozone burdens were 262, 181, 180, 180 and 182 Tg for runs 1-5 respectively.

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BibTeX Citation

@article{gr05000n,
  author={Grenfell, J. L. and Shindell, D. T. and Koch, D. and Rind, D.},
  title={Chemistry-climate interactions in the Goddard Institute for Space Studies general circulation model: 2. New insights into modeling the pre-industrial atmosphere},
  year={2001},
  journal={J. Geophys. Res.},
  volume={106},
  pages={33435--33451},
  doi={10.1029/2000JD000090},
}

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RIS Citation

TY  - JOUR
ID  - gr05000n
AU  - Grenfell, J. L.
AU  - Shindell, D. T.
AU  - Koch, D.
AU  - Rind, D.
PY  - 2001
TI  - Chemistry-climate interactions in the Goddard Institute for Space Studies general circulation model: 2. New insights into modeling the pre-industrial atmosphere
JA  - J. Geophys. Res.
VL  - 106
SP  - 33435
EP  - 33451
DO  - 10.1029/2000JD000090
ER  -

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