"Model simulation and data science to understand the global greenhouse gas cycle" and "Overview of greenhouse gas retrievals from Space"

Hisashi Yashiro and Yu Someya -
Data Science

Date: -
Location: Eurecom

Talk 1 (14:00 - 14:45) Speaker: Hisashi Yashiro (National Institute for Environmental Studies, Japan) Title: Model simulation and data science to understand the global greenhouse gas cycle Abstract: The Paris Agreement, an international treaty on climate change that came into force in 2016, aims to hold the global average temperature increase below 2°C above pre-industrial levels. The agreement has a mechanism called the Global Stocktake (GST), which assesses the progress made by countries worldwide in achieving their greenhouse gas (GHG) emission reduction targets. Understanding atmospheric GHG concentrations and absorption/emissions of GHGs from the Earth's surface by satellite observation is important for objectively verifying reports from each country. In this presentation, we will introduce the overview and issues of model simulation and data assimilation linked with GHG satellite observations. Biography: Dr. Hisashi Yashiro is a senior researcher at the National Institute for Environmental Studies (NIES) in Tsukuba, Japan. He is currently a member of the Greenhouse gases Observing Satellite (GOSAT) project. He obtained a Ph.D. degree in geophysics (atmospheric science) from Tohoku University. From 2011 to 2019, he was a member of RIKEN R-CCS as a research scientist, worked on weather/climate modeling, and contributed to the large-scale weather simulation on the K computer. He is a core developer of the Nonhydrostatic ICosahedral Atmospheric Model (NICAM), a Japanese exascale climate model. He worked on the system-application co-design between the computational science of the weather/climate domain and the supercomputer Fugaku as a member of the FLAGSHIP2020 project in RIKEN R-CCS. Talk 2 (14:45 - 15:30) Speaker: Yu Someya (National Institute for Environmental Studies, Japan) Title: Overview of greenhouse gas retrievals from Space Abstract: Satellite remote sensing is an effective tool for grasping the global behavior of greenhouse gases (CO2 and CH4). The Japanese satellite, GOSAT, is the first satellite dedicated to monitoring them. Greenhouse gas concentrations are obtainable from the infrared spectra obtained by the satellite by the retrieval analysis. I review the GOSAT series projects and the retrieval algorithm in this talk. References: Yokota et al. (2009) https://www.jstage.jst.go.jp/article/sola/5/0/5_0_160/_article/-char/ja/ Yoshida et al. (2011) https://amt.copernicus.org/articles/4/717/2011/ Biography: Yu Someya received the Ph.D. degree in environmental science from the University of Tokyo in 2015. He currently works on the GOSAT series projects as a senior researcher at National Institute for Environmental Studies, Japan. His research concerns the satellite remote sensing of greenhouse gases and air pollutants.