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AIRS retrieved CO2 and its association with climatic parameters over india during 2004-2011

Kumar, KR and Revadekar, JV and Tiwari, YK (2014) AIRS retrieved CO2 and its association with climatic parameters over india during 2004-2011. Science of the Total Environment, 476-77. pp. 79-89.

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Atmospheric Infrared Sounder (AIRS) retrieved mid-tropospheric Carbon Dioxide (CO2) have been used to study the variability and its association with the climatic parameters over India during 2004 to 2011. The study also aims in understanding transport of CO2 from surface to mid-troposphere over India. The annual cycle of mid-tropospheric CO2 shows gradual increase in concentration from January till the month of May at the rate ~0.6ppm/month. It decreases continuously in summer monsoon (JJAS) at the same rate during which strong westerlies persists over the region. A slight increase is seen during winter monsoon (DJF). Being a greenhouse gas, annual cycle of CO2 show good resemblance with annual cycle of surface air temperature with correlation coefficient (CC) of +0.8. Annual cycle of vertical velocity indicate inverse pattern compared to annual cycle of CO2. High values of mid-tropospheric CO2 correspond to upward wind, while low values of mid-tropospheric CO2 correspond to downward wind. In addition to vertical motion, zonal winds are also contributing towards the transport of CO2 from surface to mid-troposphere. Vegetation as it absorbs CO2 at surface level, show inverse annual cycle to that of annual cycle of CO2 (CC-0.64). Seasonal variation of rainfall-CO2 shows similarities with seasonal variation of NDVI-CO2. However, the use of long period data sets for CO2 at the surface and at the mid-troposphere will be an advantage to confirm these results.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Atmospheric infrared sounders; Climatic parameters; Correlation coefficient; Indian sub-continent; Seasonal variation; Surface air temperatures; Vertical motions; Vertical velocity, Atmospheric thermodynamics; Greenhouse gases; Infrared devices; Infrared instruments; Rain; Temperature; Troposphere; Vegetation; Wind, Carbon dioxide, carbon dioxide; rain; carbon dioxide, air temperature; AIRS; atmospheric chemistry; carbon dioxide; climatology; concentration (composition); rainfall; troposphere; vertical movement; westerly; wind field, air temperature; article; atmospheric infrared sounder; carbon dioxide transport; climate; concentration (parameters); correlation analysis; greenhouse gas; India; priority journal; seasonal variation; spectrometer; summer; troposphere; vegetation; wind; winter; air pollutant; air pollution; AIRS CO(2); atmosphere; chemistry; environmental monitoring; Indian sub-continent; infrared radiation; season; statistics; temperature; Winds, India, AIRS CO(2); Indian sub-continent; Rainfall; Temperature; Vegetation; Winds, Air Pollutants; Air Pollution; Atmosphere; Carbon Dioxide; Climate; Environmental Monitoring; India; Infrared Rays; Seasons; Temperature; Wind
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 05 Dec 2014 10:50
Last Modified: 05 Dec 2014 10:50

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