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首页> 外文会议>International Conference on Regional Carbon Budgets; 20060816-18; Beijing(CN) >Variations of the tropical pacific oceanic pCO_2 and air-sea CO_2 flux
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Variations of the tropical pacific oceanic pCO_2 and air-sea CO_2 flux

机译：热带太平洋海洋pCO_2和海气CO_2通量的变化

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摘要

Significant spatial and temporal variability in sea minus air pCO_2 (40-160 μatm) and sea-to-air CO_2 flux (1-6 mol C m~(-2) year~(-1)) are simulated for the tropical Pacific. The magnitude, spatial pattern, and the seasonal to interannual variability from the model are in general agreement with observations. DIC plays a dominant role in determining the interannual variability of the sea surface pCO_2 in the tropical Pacific. However, SST can also significantly influence the spatial and temporal variability in the sea surface pCO_2 in particular during warm seasons. On seasonal time scales, the sea surface pCO_2 is relatively high both in fall and in spring in the eastern upwelling region. While the high sea surface pCO_2 in fall is associated with the upwelling of carbon-rich water, the high sea surface pCO_2 in spring results from the high SST and low out-gassing. On interannual time scales, the sea surface pCO_2 is largely associated with the ENSO cycle, and the estimated regional outgassing ranges from 0.4 Gt C year~(-1) during warm ENSO to ～1 Gt C year~(-1) during cold ENSO.rnThese analyses offer useful insights not only for the carbon fluxes in the tropical Pacific Ocean, but also for better understanding of sources and sinks in the global carbon budget.
机译：模拟了热带太平洋海域负空气pCO_2（40-160μatm）和海对空CO_2通量（1-6 mol C m〜（-2）年〜（-1））的时空变化。该模型的大小，空间格局以及季节到年际的变化与观测值基本一致。 DIC在确定热带太平洋海面pCO_2的年际变化中起主要作用。但是，特别是在温暖的季节，海表温度也会显着影响海面pCO_2的时空变化。在季节性时间尺度上，东部上升区的秋季和春季海面pCO_2相对较高。虽然秋季的高海面pCO_2与富含碳的水的上升有关，但春季的高海面pCO_2是高SST和低放气的结果。在年际尺度上，海面pCO_2主要与ENSO周期有关，估计的区域放气范围从暖ENSO期间的0.4 Gt C年〜（-1）到冷ENSO期间的〜1 Gt C年〜（-1）。这些分析不仅为热带太平洋中的碳通量提供了有用的见解，而且还为更好地了解全球碳预算中的源和汇提供了有用的见解。

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