Published Paper Details:

Understanding the distribution of methane source and sink regions is important to quantitatively assess the observed changes in atmospheric concentrations and climate change. The Greenhouse Gases Observing Satellite-1 (GOSAT-1), is the world's first Earth observation satellite dedicated to greenhouse gas monitoring which measures the densities of carbon dioxide and methane from 56,000 locations on the Earth's atmosphere. In this regard, GOSAT-1 data from 2010 to 2018 has been analyzed to understand the methane spatiotemporal variability, seasonality and source and sink regions of methane concentration. During the 2010 to 2015 period, growth in atmospheric methane is attributed mostly to an increase in emissions from India, China and areas with large tropical wetlands. Maximum surface flux emits from India (4.756 Tg/y) and China (6.898 Tg/ y). Compared to other regions, China and India have a high source of methane. The hydroxyl radical is the main contributor to the methane's sink (troposphere OH). In India, CH4 concentration is maximum in September, and the minimum is in February/March. The tropical wetland or agricultural or combination of both of the rising global methane 2008 in words. The study helped in understanding the methane spatiotemporal characteristics, source and sink regions of methane, and budgeting the methane concentrations.