Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 5.414
IF5.414
IF 5-year value: 5.958
IF 5-year
5.958
CiteScore value: 9.7
CiteScore
9.7
SNIP value: 1.517
SNIP1.517
IPP value: 5.61
IPP5.61
SJR value: 2.601
SJR2.601
Scimago H <br class='widget-line-break'>index value: 191
Scimago H
index
191
h5-index value: 89
h5-index89
Volume 9, issue 3
Atmos. Chem. Phys., 9, 783–794, 2009
https://doi.org/10.5194/acp-9-783-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 9, 783–794, 2009
https://doi.org/10.5194/acp-9-783-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Feb 2009

02 Feb 2009

Methane plume over south Asia during the monsoon season: satellite observation and model simulation

X. Xiong1,2, S. Houweling3, J. Wei1,2, E. Maddy1,2, F. Sun1,2, and C. Barnet1 X. Xiong et al.
  • 1NOAA/NESDIS/Center for Satellite Applications and Research, Camp Springs, Maryland, USA
  • 2Perot Systems Government Services, Fairfax, Virginia, USA
  • 3Netherlands Institute for Space Research, Utrecht, The Netherlands

Abstract. Satellite retrievals of methane (CH4) using the Atmospheric Infrared Sounder (AIRS) on the EOS/Aqua platform from 2003–2007 show a strong, plume-like enhancement of CH4 in the middle to upper troposphere over South Asia during July, August and September, with the maximum occurring in early September. Simulations using the global tracer model version 3 (TM3) also show similar seasonal enhancement of CH4 in the same region. The model results also suggest that this enhancement is associated with transport processes and local surface emissions, thus the observations of tropospheric CH4 during the monsoon season may be used to constrain the models for a better estimation of Asian CH4 sources. Further comparisons between the AIRS retrievals and the model simulations suggest a possible overestimate of emissions from rice paddies in Southeast Asia in the scenario with the global emissions from rice of 60 Tg yr−1. Moreover, the observed tropospheric CH4 enhancement from AIRS provides evidence for the strong transport of atmospheric pollutants from the lower to the upper troposphere in Asia during the monsoon season. The observed rapid disappearance of the local CH4 maximum in September may provide valuable information for studying the dissipation of the Tibetan anticyclone and the withdrawal of monsoon.

Publications Copernicus
Download
Citation
Altmetrics
Final-revised paper
Preprint