Air–sea CO2 flux variability in the equatorial Pacific Ocean near 100°W

IF 2.3 4区地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES

Tellus Series B-Chemical and Physical Meteorology Pub Date : 1999-07-01 DOI:10.3402/TELLUSB.V51I3.16474

J. Etcheto, J. Boutin, Y. Dandonneau, D. Bakker, R. Feely, R. Ling, P. Nightingale, R. Wanninkhof

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引用次数: 15

Abstract

The interannual variability of the CO 2 partial pressure ( p CO 2oc ) in the surface layer of the east equatorial Pacific Ocean near 100°W is studied and compared with the sea surface temperature (SST) monitored from satellites. This variability is shown to be correlated with the SST anomaly rather than with the temperature itself. The p CO 2oc variability is related to the variability of the upwelling systems (the equatorial upwelling and the upwelling along the American coast), the main influence being from the coastal upwelling via the surface water advected from the east. A method is derived to interpolate the p CO 2oc measurements using the SST satellite measurements. By combining the result with the exchange coefficient ( K ) deduced from the wind speed provided by satellite borne instruments we deduce the air–sea CO 2 flux and for the 1st time we monitor continuously its temporal evolution. The variability of this flux is mainly due to the variability of K , with a clear seasonal variation. The flux obtained using the Liss and Merlivat (1986) relationship averaged from April 1985 to June 1997 in the region 97.5°−107.5°W 0–5°S is 1.67 mole m −2 yr −1 of CO 2 leaving the ocean with an estimated accuracy of 30%. DOI: 10.1034/j.1600-0889.1999.t01-1-00013.x

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赤道太平洋近100°W的海气CO2通量变率

本文研究了赤道东太平洋近100°W表层co2分压(p CO 2oc)的年际变化，并与卫星监测的海表温度(SST)进行了比较。这种变率与海温异常有关，而与温度本身无关。pco2oc的变率与上升流系统(赤道上升流和美洲沿岸上升流)的变率有关，主要受沿海上升流通过东部平流的地表水的影响。推导了一种利用海温卫星测量值对pco2oc测量值进行插值的方法。结合星载仪器提供的风速交换系数(K)，我们推导出了海气CO 2通量，并首次连续监测了其时间演变。该通量的变异性主要是由于K的变异性，具有明显的季节变化。利用Liss和Merlivat(1986)关系得到的通量从1985年4月到1997年6月在97.5°- 107.5°W 0-5°S区域平均为1.67摩尔m - 2年- 1 co2离开海洋，估计精度为30%。DOI: 10.1034 / j.1600 0889.1999.t01 - 1 - 00013. x

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来源期刊

Tellus Series B-Chemical and Physical Meteorology 地学-气象与大气科学

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期刊介绍： Tellus B: Chemical and Physical Meteorology along with its sister journal Tellus A: Dynamic Meteorology and Oceanography, are the international, peer-reviewed journals of the International Meteorological Institute in Stockholm, an independent non-for-profit body integrated into the Department of Meteorology at the Faculty of Sciences of Stockholm University, Sweden. Aiming to promote the exchange of knowledge about meteorology from across a range of scientific sub-disciplines, the two journals serve an international community of researchers, policy makers, managers, media and the general public.