2014 Fiscal Year Final Research Report
Understanding chemistry, transport and surface fluxes of greenhouse gases by a multi-species and multi-model approach
Project/Area Number |
22241008
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Environmental dynamic analysis
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Research Institution | Japan Agency for Marine-Earth Science and Technology |
Principal Investigator |
PATRA Prabir 独立行政法人海洋研究開発機構, 地球表層物質循環研究分野, 主任研究員 (70392967)
|
Co-Investigator(Kenkyū-buntansha) |
ISHIJIMA Kentaro 独立行政法人海洋研究開発機構, 地球表層物質循環研究分野, 研究員 (90399494)
|
Project Period (FY) |
2010-04-01 – 2015-03-31
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Keywords | 温室効果気体 / 大気化学輸送モデル / 逆解法 / 放出量推定 / フラックス推定 / 航空機観測 |
Outline of Final Research Achievements |
We have developed an atmospheric general circulation model-based chemistry transport model (ACTM) in JAMSTEC for simulating the major greenhouse gases (GHGs) and ozone depleting substances (ODSs). The development of simple ACTM was essential because most of these gases are either lost in troposphere by reacting with hydroxyl (OH) radicals in troposphere or photolysis in the stratosphere. Efforts have been made to constrain OH in troposphere using a proxy species (CH3CCl3), and to evaluate interhemispheric transport using SF6 in ACTM. We have led and participated in the TransCom-CH4 model intercomparison experiment. Following the validation of transport and chemistry, inverse modeling of emissions have been conducted. We proposed significantly higher summer-time emissions of HCFC-22 and HFC-134a. The fluxes of CO2 and CH4 are estimated for 53-84 regions using surface observation networks and aircraft measurements. We have contributed to some of the analyses in Chapter 6 of the IPCC AR5.
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Free Research Field |
大気化学
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