Interannual variability of fCO2 in the Greenland and Norwegian Seas

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

Tellus Series B-Chemical and Physical Meteorology Pub Date : 1999-04-01 DOI:10.1034/J.1600-0889.1999.00024.X

I. Skjelvan, T. Johannessen, L. Miller

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引用次数: 24

Abstract

The fCO 2 in the Greenland and Norwegian Seas surface water varied significantly during the period from 1995 to 1997. Comparison of fCO 2 data from winter 1995 with data from winter 1997 showed that sea surface fCO 2 decreased between these winters by 20 to 30 μatm in the central Greenland Sea, and the potential CO 2 uptake during the winters of 1995 and 1997 was 3.9. 10 -3 Gt C month 1 and 5.9.10 -3 Gt C month -1 (based on Wanninkhof's relationship for the gas transfer coeflicient), respectively. This difference in CO 2 fluxes can be attributed to lower sea surface temperatures and more extensive sea ice cover in 1997, and these observations were related to increased convection in the Greenland Sea during winter 1997. Larger amplitudes in the seasonal variations of CO 2 flux were also seen during the other seasons in the period 1996-97. compared to 1995. Over the years of investigation in the Greenland Sea, the carbon flux showed an inereasing trend of 9.10 -4 Gt C yr 1 into the ocean, which may be related to the anthropogenic input of carbor, to the atmosphere. The Greenland and Norwegian Seas appear to be sinks for atmospheric CO 2 and together absorb approximately 0.12±0.015 Gt C yr -1 .

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格陵兰海和挪威海fCO2的年际变化

1995年至1997年期间，格陵兰海和挪威海地表水中的fCO 2变化很大。1995年冬季和1997年冬季的fCO 2资料比较表明，格陵兰海中部海面fCO 2在这两个冬季之间减少了20 ~ 30 μatm, 1995年和1997年冬季的潜在co2吸吸量为3.9 μatm。分别为10 -3 Gt C月1和5.9.10 -3 Gt C月1(基于气体传递系数的waninkhof关系)。二氧化碳通量的这种差异可归因于1997年海面温度降低和海冰覆盖范围扩大，这些观测结果与1997年冬季格陵兰海对流增加有关。1996- 1997年其他季节CO 2通量的季节变化幅度也较大。与1995年相比。多年来，格陵兰海进入海洋的碳通量呈9.10 ~ 4 Gt C yr 1的增加趋势，这可能与人为向大气输入碳有关。格陵兰海和挪威海似乎是大气co2的汇，它们总共吸收了大约0.12±0.015 Gt℃/年。

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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.