NASAのミッションが温室効果ガス排出源の発見に成功(NASA Mission Excels at Spotting Greenhouse Gas Emission Sources)


2023-11-17 NASA

◆国際宇宙ステーション(ISS)に搭載されているEMIT(Earth Surface Mineral Dust Source Investigation)イメージング分光計が、地球の表面鉱物だけでなく、メタン放出源を検出する驚異的な能力を示しています。


宇宙からのEMIT観測を用いた個々のメタンと二酸化炭素の排出源の帰属 Attribution of individual methane and carbon dioxide emission sources using EMIT observations from space

Andrew K. Thorpe,Robert O. Green,David R. Thompson,Philip G. Brodrick,John W. Chapman,Clayton D. Elder,Itziar Irakulis-Loitxate,Daniel H. Cusworth,Alana K. Ayasse,Riley M. Duren,Christian Frankenberg,Luis Guanter,John R. Worden,Philip E. Dennison,Dar A. Roberts,K. Dana Chadwick,Michael L. Eastwood,Jay E. Fahlen,and Charles E. Miller
Science AdvancesPublished:17 Nov 2023

NASAのミッションが温室効果ガス排出源の発見に成功(NASA Mission Excels at Spotting Greenhouse Gas Emission Sources)


Carbon dioxide and methane emissions are the two primary anthropogenic climate-forcing agents and an important source of uncertainty in the global carbon budget. Uncertainties are further magnified when emissions occur at fine spatial scales (<1 km), making attribution challenging. We present the first observations from NASA’s Earth Surface Mineral Dust Source Investigation (EMIT) imaging spectrometer showing quantification and attribution of fine-scale methane (0.3 to 73 tonnes CH4 hour−1) and carbon dioxide sources (1571 to 3511 tonnes CO2 hour−1) spanning the oil and gas, waste, and energy sectors. For selected countries observed during the first 30 days of EMIT operations, methane emissions varied at a regional scale, with the largest total emissions observed for Turkmenistan (731 ± 148 tonnes CH4 hour−1). These results highlight the contributions of current and planned point source imagers in closing global carbon budgets.