Wintertime pollution over the Eastern Indo-Gangetic Plains as observed from MOPITT, CALIPSO and tropospheric ozone residual data 1Science Systems and Applications Inc., Hampton, VA, 23666, USA
23 Dec 2010
2National Center for Atmospheric Research, Boulder, CO, USA
3NASA Langley Research Center, Hampton, VA, 23681, USA
4National Institute of Aerospace, Hampton, VA, 23666, USA
*currently at: American Meteorological Society, Boston, MA 02108, USA
Received: 19 August 2010 – Published in Atmos. Chem. Phys. Discuss.: 01 September 2010 Abstract. A large wintertime increase in pollutants has been observed over the eastern
parts of the Indo Gangetic Plains. We use improved version 4 carbon monoxide
(CO) retrievals from the Measurements of Pollution in the Troposphere
(MOPITT) along with latest version 3 aerosol data from the Cloud-Aerosol
Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) lidar
instrument and the tropospheric ozone residual products to characterize this
pollution pool. The feature is seen primarily in the lower troposphere from
about November to February with strong concomitant increases in CO and
aerosol optical depth (AOD). The signature of the feature is also observed
in tropospheric ozone column data. The height resolved aerosol data from
CALIPSO confirm the trapping of the pollution pool at the lowest altitudes.
The observations indicate that MOPITT can capture this low altitude
phenomenon even in winter conditions as indicated by the averaging kernels.
Revised: 02 December 2010 – Accepted: 20 December 2010 – Published: 23 December 2010
Citation: Kar, J., Deeter, M. N., Fishman, J., Liu, Z., Omar, A., Creilson, J. K., Trepte, C. R., Vaughan, M. A., and Winker, D. M.: Wintertime pollution over the Eastern Indo-Gangetic Plains as observed from MOPITT, CALIPSO and tropospheric ozone residual data, Atmos. Chem. Phys., 10, 12273-12283, doi:10.5194/acp-10-12273-2010, 2010.