Satellite based trend analysis of few atmospheric parameters over the Indian region

Publication date: Available online 16 September 2019Source: Advances in Space ResearchAuthor(s): Pooja Jindal, Pradeep Kumar Thapliyal, Munn Vinayak Shukla, Som Kumar Sharma, Debashis MitraAbstractThe present work has been carried to analyze the changes in trend of temperature, water vapor and ozone profiles at different atmospheric layers, total column integrated methane (TCH4) and total column integrated carbon-monoxide (TCO) over the Indian region. The atmospheric column was divided into few atmospheric layers: surface-850 hPa, 850-500 hPa, 500-100 hPa, 100-50 hPa and 50-1 hPa. Monthly averages of these parameters were calculated from AIRS Level 2 Standard Products for a decade from 2003 to 2012. A non-parametric statistical test with seasonal modification was applied to check the trends of various parameters. Monthly means were used to examine the seasonal dependency in the trend, and allowing more information from the data to be used. The layer average temperature in surface-850 hPa layer has shown significant increase in overall annual trend over eastern part, southern part and averaged over whole India with an increase of 0.041 K/year, 0.034 K/year and 0.034 K/year, respectively. The overall trend was decreasing over all but southern parts in 100-50 hPa layer at the rate of 0.079 K/year over whole India. For water vapor trends, it has been found that layer integrated water vapor (LIWV) in surface-850hPa layer has significant overall increasing trend over western part, ...
Source: Advances in Space Research - Category: Science Source Type: research