Brown Bag Seminar: Prabir Patra



Carbon dioxide (CO2) and methane (CH4) are the most important anthropogenically produced greenhouse gases and pose significant challenges for the global carbon cycle modelers in the changing climate. We use a top-down (inversion) method that uses observations of these gases from surface sites and remote sensing platforms, and an atmospheric chemistry-transport model (ACTM). Our joint analysis of CO2 and CH4 inversion results showed the importance of a priori fossil fuel emissions for inferring trends in CO2 sinks estimated for China. I will also discuss some other issues we face in the top-down modeling systems in relation with the terrestrial biospheric modeling. We also have developed a simple CO2 flux calculation method using total column CO2 measurements by OCO2, and estimated an anomalous CO2 source of 2-3 PgC due to the most recent El Nino event (2015-2016).


Dr. Prabir Patra is a senior Scientist at the Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC). His main research interest is to understand cycling of greenhouse gases (GHGs) and ozone-depleting substances (ODSs) using atmospheric chemistry-transport models (ACTMs). He is one of the main developers of JAMSTEC’s ACTM, and has been actively involved in all Transport model intercomparison (TransCom) experiments since the early 2000s.