Temporal variability of the anthropogenic CO 2 storage in the Irminger Sea
Temporal variability of the anthropogenic CO 2 storage in the Irminger Sea
复制标题
伊尔明格海人为 CO 2 储存的时间变化
DOI：
10.5194/bg-5-1669-2008
复制
发表时间：
2008
期刊：
影响因子：
4.9
通讯作者：
A. Ríos
中科院分区：
文献类型：
--
作者：
F. F. Pérèz;M. Vázquez;E. Louarn;X. A. Padin;H. Mercier;A. Ríos
抽象的。在北大西洋副极地环流的Irminger海地区，跨越二十多年（1981-2006年）的巡航的人为CO2（Cant）的估计揭示了一个很大的变化，在Cant存储率。在20世纪90年代早期，坎特储存率（2.3±0.6 mol C m−2 yr−1）是1981-2006年平均储存率（1.1±0.1 mol C m−2 yr−1）的两倍，而从1997年开始，坎特储存率显著下降到平均储存率的一半。Cant储存量的演变与氯氟烃12清单平行，并且与根据海面pCO 2测量值计算的Cant吸收增加率非常一致。拉布拉多海水对Irminger盆地Cant总库存的贡献从20世纪90年代初的66%下降到21世纪初的49%。1996年，北大西洋涛动从正相位转变为负相位，导致拉布拉多海的海气热损失减少。随之而来的对流减弱伴随着层化的增加，降低了北大西洋北方CO2汇的效率。
Abstract. The anthropogenic CO2 (Cant) estimates from cruises spanning more than two decades (1981–2006) in the Irminger Sea area of the North Atlantic Subpolar Gyre reveal a large variability in the Cant storage rates. During the early 1990's, the Cant storage rates (2.3±0.6 mol C m−2 yr−1) doubled the average rate for 1981–2006 (1.1±0.1 mol C m−2 yr−1), whilst a remarkable drop to almost half that average followed from 1997 onwards. The Cant storage evolution runs parallel to chlorofluorocarbon-12 inventories and is in good agreement with Cant uptake rates of increase calculated from sea surface pCO2 measurements. The contribution of the Labrador Seawater to the total inventory of Cant in the Irminger basin dropped from 66% in the early 1990s to 49% in the early 2000s. The North Atlantic Oscillation shift from a positive to a negative phase in 1996 led to a reduction of air-sea heat loss in the Labrador Sea. The consequent convection weakening accompanied by an increase in stratification has lowered the efficiency of the northern North Atlantic CO2 sink.