Gas exchange and CO2 flux in the tropical Atlantic Ocean determined from 222Rn and pCO2 measurements
Gas exchange and CO2 flux in the tropical Atlantic Ocean determined from 222Rn and pCO2 measurements
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根据 222Rn 和 pCO2 测量确定热带大西洋的气体交换和 CO2 通量
DOI：
10.1029/jc090ic04p07005
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发表时间：
1985
影响因子：
--
通讯作者：
J. Ledwell
中科院分区：
文献类型：
--
作者：
W. Smethie;Taro Takahashi;D. Chipman;J. Ledwell
作为TTO/TAS计划的一部分，在热带大西洋同时测量了表层水和大气中的/sup 222/Rn垂直廓线和pCO/sub 2/。气体交换速率或活塞速度由/sup 222/Rn曲线确定，并且三角洲根据pCO/sub 2/的测量结果确定了海洋表面与大气之间的pCO/sub 2/。根据这两组数据计算了CO2/sub 2/穿过海-气界面的净通量。活塞速度范围从1.4到6.9米/天，并与风速。活塞速度对风速的斜率估计在0.3和1.1（m/d）/（m/s）之间。那个...三角洲pCO/sub 2/范围为/-/ 35. Mu..在15/degree/N，55/degree/W至+ 64. Mu..在5/度/S，28/度/W的大气压下，三角洲pCO/sub 2/等值线位于约10/degree/N。高..三角洲pCO/sub 2/值可以通过来自东部的地表水的横向平流来解释，在运输过程中加热和生物消耗CO/sub 2/和碱度。CO2净通量在北纬10度以北海域，在北纬15度、西经50度时最大，为1.4molm/sup /minus/2/ yr/sup /minus/1/。在10/度/N以南，净通量流出海洋，在8/度/S，28/度/W时达到最大值2.7 mol m/sup /minus/2/ yr/sup /minus/1/。从10/度/N到10/度/S的平均净通量为1.3 mol m/sup /minus/2/ yr/sup /minus/1/出海洋，如果全年应用所确定的通量，则相当于每年0.15亿吨碳。参考文献56篇，图16，4 tabs.ss «更少
Measurements of /sup 222/Rn vertical profiles and pCO/sub 2/ in the surface water and the atmosphere were made simultaneously in the tropical Atlantic Ocean as part of the TTO/TAS program. The gas exchange rate or piston velocity was determined from the /sup 222/Rn profiles, and the ..delta..pCO/sub 2/ between the surface ocean and the atmosphere was determined from the pCO/sub 2/ measurements. The net flux of CO/sub 2/ across the sea-air interface was calculated from these two data sets. The piston velocity ranged from 1.4 to 6.9 m/d and was correlated with wind speed. The slope of piston velocity versus wind speed was estimated to be between 0.3 and 1.1 (m/d)/(m/s). The ..delta..pCO/sub 2/ ranged from /minus/ 35 ..mu..atm at 15/degree/N, 55/degree/W to + 64 ..mu..atm at 5/degree/S, 28/degree/W, with the zero ..delta..pCO/sub 2/ isopleth located at about 10/degree/N. The high ..delta..pCO/sub 2/ values can be explained by lateral advection of surface water from the east with heating and biological consumption of CO/sub 2/ and alkalinity during transit. The net flux of CO/sub 2/ was into the ocean north of 10/degree/N latitude with values reaching a maximum of 1.4 mol m/sup /minus/2/ yr/sup /minus/1/ at 15/degree/N, 50/degree/W. South of 10/degree/N,more » the net flux was out of the ocean, reaching a maximum value of 2.7 mol m/sup /minus/2/ yr/sup /minus/1/ at 8/degree/S, 28/degree/W. The average net flux from 10/degree/N to 10/degree/S was 1.3 mol m/sup /minus/2/ yr/sup /minus/1/ out of the ocean, which is equivalent to 0.15 gigatons of carbon per year if the flux determined applied throughout the year. 56 refs., 16 figs., 4 tabs.ss« less
影响因子：
3.5
作者：
LARGE, WG;POND, S
通讯作者：
POND, S