[A-CG47] Global Carbon Cycle Observation and Analysis

[ACG47-P02] Preliminary results for GOSAT-2 Level 4 global surface fluxes

*齊藤 誠¹、丹羽 洋介¹、佐伯 田鶴¹、村上 和隆¹、Cong Richio¹、宮内 達也¹、八代 尚¹、白石 知弘¹、平田 竜一¹、吉田 幸生¹、森野 勇¹、野田 響¹、大山 博史¹、亀井 秋秀¹、松永 恒雄¹ (1.国立環境研究所)

キーワード：衛星観測、炭素循環、逆解法

The Greenhouse gases Observing SATellite 2 (GOSAT-2) was launched, as the successor of GOSAT, on 29th October 2018 into a sun-synchronous orbit at an altitude of 613 km with 6-day revisit cycle, then the satellite has been operated with normal mode since 1^st February 2019. GOSAT-2 is designed to measure atmospheric carbon dioxide (CO₂), methane (CH₄) and carbon monoxide (CO) with two instruments: The Thermal And Near-infrared Sensor for carbon Observation Fourier Transform Spectrometer 2 (TANSO-FTS-2) and the Cloud and Aerosol Imager 2 (TANSO-CAI-2). The GOSAT-2 mission inherits the main objective of the GOSAT that improves our knowledge of spatiotemporal variations of CO₂ and CH₄ in the atmosphere and the process governing their exchange between the atmosphere and the Earth's surface and contributes climate change studies and related environmental policy making. The GOSAT-2 project provides Level 1 radiance spectral products of GOSAT-2 observations for general users and released FTS-2 shortwave infrared (SWIR) Level 2 atmospheric concetration products to the GOSAT series' Research Announcement users. The GOSAT-2 Level 4 products will provide estimates of global surface fluxes on CO₂ and CH₄ based on the FTS-2 SWIR Level 2 products and surface observations. This presentation will introduce detailed features for the GOSTA-2 Level 4 product including the prior information and preliminary results on multi-year global CO₂ flux estimates using GOSAT FTS SWIR Level 2 products, and additional information about the latest GOSAT-2 products.