# Atmospheric & Environmental Chemistry Seminar #### calendar\_today Date and Time **April 12, 2023** 10:00AM - 11:00AM EDT #### pin\_drop Location **100F Pierce Hall, 29 Oxford St., Cambridge** "The Partial Column CH4 Retrieved from GOSAT and GOSAT-2 Method, Results and Applications" with Hiroshi Suto, JAXA. "The Partial Column CH4 Retrieved from GOSAT and GOSAT-2 Method, Results and Applications" with Hiroshi Suto, JAXA. Collecting greenhouse gas (GHG) data has been the basis for advancing carbon cycle science, and the data has become crucial for climate monitoring and mitigation. As one of the pioneering institutions for GHG remote sensing from space, the Japan Aerospace Exploration Agency (JAXA) continues contributing to the key data collection through matured remote sensing approaches. The Thermal And Near infrared Sensor for carbon Observation (TANSO) - the Fourier Transform Spectrometer (FTS) onboard Japan’s Greenhouse gas Observing SATellite (GOSAT, 2009-on) observes both the solar-scattered light and the thermal radiation from the Earth’s surface and atmosphere. GOSAT-2, a follow-on mission, was launched in 2018. Currently JAXA is operating both GOSAT and GOSAT-2. Recently, JAXA has developed a new retrieval algorithm to derive partial column concentrations for the upper and lower troposphere for both CO2 and CH4. Our retrieval method uniquely utilizes the Thermal InfraRed (TIR) band data in addition to the ShortWave InfraRed (SWIR) band data that are commonly used in existing GOSAT and GOSAT-2 retrievals. Having upper and lower partial columns information, we expect the partial column product to contribute to anthropogenic emission studies due to the high sensitivity to the surface emissions in the lower column data and even potentially for atmospheric vertical transport evaluation which is critical for atmospheric modeling. In my talk, I will introduce the new partial column products and present the results including validation. I will also discuss the observation strategies for both GOSAT and GOSAT-2 tailored for anthropogenic CH4 detection. Hiroshi Suto is an associate senior engineer at the Japan Aerospace Exploration Agency (JAXA), Tsukuba, Japan. Since 2006, he has been in charge of the development, calibration and the Level-1 algorithm of GOSAT/GOSAT-2 GHG observation instruments. Hiroshi received his Ph.D. in 2002 from Tohoku University, Sendai, Japan. He held a postdoctoral fellow position at the National Institute for Environmental Studies (NIES) before joining JAXA. Hiroshi is currently leading a GHG observation and analysis activities including GOSAT and GOSAT-2 operation. Harvard community only. For more information, visit [event page](https://events.seas.harvard.edu/event/the_partial_column_ch4_retrieved_from_gosat_and_gosat-2_method_results_and_applications). Contact: See also:- [ Harvard Paulson School of Engineering and Applied Sciences ](/school/harvard-paulson-school-engineering-and-applied-sciences) Share on:- [ Facebook ](#) - [ Twitter ](#) - [ Linkedin ](#) Save: [ Add to calendar calendar\_today ](https://www.environment.harvard.edu/node/1493886/event-feed.ics) Copy link link