Carbon Dioxide Transport by Ocean Currents at 25�N Latitude in the Atlantic Ocean
Carbon Dioxide Transport by Ocean Currents at 25�N Latitude in the Atlantic Ocean
复制标题
大西洋北纬 25 度洋流的二氧化碳输送
作者：
P. Brewer;C. Goyet;D. Dyrssen
在横跨佛罗里达海峡和大约25 ° N的开阔大西洋的一个剖面中测量的CO2、O2和相关化学物质的浓度与海洋质量输送的估计相结合，以估计该纬度海洋对CO2的总输送和与大气交换的净CO2通量。向北的通量为63.9 x 106摩尔每秒（mol/s）;向南的通量为64.6 x 106 mol/s。这些值产生的净CO2通量为0.7 × 106 mol/s（每年0.26 - 0.03千兆吨C）。北大西洋一直被认为是大气CO2的一个强汇，但这些结果表明，1988年25 ° N的净通量很小。对于O2，向北的等效信号为4.89 × 106 mol/s，向南的等效信号为6.97 × 106 mol/s，净输送量为2.08 × 106 mol/s或净CO2通量的三倍。这些数据表明，北大西洋今天是一个相对较小的汇大气CO2，尽管其大量的热损失，但更大的汇O2，因为添加剂的化学和热泵的CO2循环的影响，但他们的近相等和相反的影响CO2循环。
Measured concentrations of CO2, O2, and related chemical species in a section across the Florida Straits and in the open Atlantic Ocean at approximately 25�N, have been combined with estimates of oceanic mass transport to estimate both the gross transport of CO2 by the ocean at this latitude and the net CO2 flux from exchange with the atmosphere. The northward flux was 63.9 x 106 moles per second(mol/s); the southward flux was 64.6 x 106 mol/s. These values yield a net CO2 flux of 0.7 x 106 mol/s (0.26 � 0.03 gigaton of C per year) southward. The North Atlantic Ocean has been considered to be a strong sink for atmospheric CO2, yet these results show that the net flux in 1988 across 25�N was small. For O2 the equivalent signal is 4.89 x 106 mol/s northward and 6.97 x 106 mol/s southward, and the net transport is 2.08 x 106 mol/s or three times the net CO2 flux. These data suggest that the North Atlantic Ocean is today a relatively small sink for atmospheric CO2, in spite of its large heat loss, but a larger sink for O2 because of the additive effects of chemical and thermal pumping on the CO2 cycle but their near equal and opposite effects on the CO2 cycle.