1146 Influence of Large-Scale Circulation on Carbon Dioxide

Wednesday, 10 January 2018
Exhibit Hall 3 (ACC) (Austin, Texas)
Jason La, Univ. of Houston, Houston, TX; and X. Jiang, L. Li, and Y. Yung

CO2 has been shown to have adverse effects on a global scale, causing changes to the temperature, environments and habitats of all life on Earth. OCO-2 and GOSAT offer new insight to CO2 column measurements with emphasis at the lower troposphere. We explore the OCO-2 and GOSAT CO2 data over the South-Atlantic region and investigate the effects of the South Atlantic Walker Circulation on the distribution of OCO-2 and GOSAT CO2 in the region. It is found that there is more CO2 over South America than South Atlantic Ocean, which is consistent with rising air over South America and sinking air over South Atlantic Ocean. We also explore the distribution of OCO-2 and GOSAT CO2 in the Pacific Ocean during normal years and El Niño years. There are positive CO2 anomalies over the central Pacific Ocean and negative CO2 anomalies over the western Pacific Ocean during El Niño years, which is consistent with changes in the walker circulation during El Niño years. These analyses will lead to a better understanding of how large-scale atmospheric processes affect atmospheric CO2 concentrations, therefore, lead to a better understanding of the global carbon cycle.
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