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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Interannual variability of winter oceanic CO2 and air-sea CO2 flux in the western North Pacific for 2 decades
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Interannual variability of winter oceanic CO2 and air-sea CO2 flux in the western North Pacific for 2 decades

机译：北太平洋西部冬季海洋CO2和海气CO2通量连续20年的年际变化

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摘要

The 2-decade records of the partial pressure of CO2 in surface waters (pCO2 sea) and the resulting air-sea CO2 flux in the extensive subtropical to equatorial area along 137°E in the western North Pacific in winter exhibited significant interannual variations that differed in different regions. The pCO2 sea varied largely in the equatorial region of 3°N to 6°N, depending on the oceanographic conditions related to the El Ni?o–Southern Oscillation (ENSO) events. The magnitude of the variations differed year by year, corresponding to the different degrees of compensation between the sea surface temperature (SST) and dissolved inorganic carbon (DIC) effects on pCO2 sea during the events. Small pCO2 sea variations in the subtropical gyre north of 23°N were due to highly counteracting effects between anticorrelated SST and DIC anomalies through the entrainment process. In contrast, a low negative correlation existed between SST and DIC, associated with the lateral advection in the region restricted around 15°N to 18°N in the North Equatorial Current, resulting in a large amplitude of variations of pCO2 sea and hence CO2 influx. The interannual variations of CO2 flux depended predominantly on the difference in pCO2 between air and sea south of 18°N, but on wind speed in the northern region. It is important to monitor how the contributions of different properties to the CO2 flux could change in the western North Pacific, responding to possible shifts of the ENSO conditions and the future progress of global warming.
机译：冬季北太平洋西部137°E沿亚热带到赤道的大范围亚热带至赤道区域，地表水（pCO2海）中的CO2分压和由此产生的海气CO2通量的2年记录显示出明显的年际变化，在不同的地区。根据与厄尔尼诺-南方涛动（ENSO）事件有关的海洋学条件，pCO2海在3°N至6°N赤道区域变化很大。变化的幅度逐年不同，这对应于事件期间海面温度（SST）和溶解无机碳（DIC）对pCO2海的补偿程度不同。在23°N以北的亚热带回旋中，pCO2海变化较小，这是由于反相关的SST和DIC异常通过夹带过程之间的高度抵消作用所致。相反，SST与DIC之间存在较低的负相关性，与北赤道洋流限制在15°N至18°N左右的区域中的横向对流有关，导致pCO2海的变化幅度较大，从而导致CO2涌入。 CO2通量的年际变化主要取决于18°N以南的空气与海洋之间pCO2的差异，但取决于北部地区的风速。重要的是，要监测北太平洋西部地区不同性质对二氧化碳通量的贡献如何变化，以应对ENSO条件的可能变化以及全球变暖的未来进展。

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