Arctic/Atlantic Exchanges via the Subpolar Gyre*
Arctic/Atlantic Exchanges via the Subpolar Gyre*
复制标题
通过副极地环流的北极/大西洋交流*
DOI：
10.1175/jcli-d-11-00085.1
复制
发表时间：
2012
影响因子：
4.9
通讯作者：
O. Otterå
中科院分区：
文献类型：
--
作者：
H. Langehaug;I. Medhaug;T. Eldevik;O. Otterå
利用卑尔根气候模式对工业化前600年的副极地环流（SPG）强度和形状的年代际变化进行了研究。大气对SPG强度的影响反映在拉布拉多海水（LSW）的变化，这在很大程度上是由北大西洋涛动，北大西洋大气变率的第一模式控制。LSW的量，从北欧海域的溢出，和大气变化的第二种模式，东大西洋模式的组合，解释了44%的模拟的SPG强度的十年变化。这些成分的事先增加导致在西部次极地地区的SPG加强。通常，总溢出增加一个标准差（std dev）（1标准差5 0.2 Sv; 1 Sv [ 10 6 m 3 s 21）对应于约为SPG强度一半的增强（1stddev 52 Sv），LSW量增加一个标准差，同时，北大西洋海流的强度增加了一半标准偏差（1标准偏差5 0.9 Sv）。
In the present study the decadal variability in the strength and shape of the subpolar gyre (SPG) in a 600-yr preindustrial simulation using the Bergen Climate Model is investigated. The atmospheric influence on the SPG strength is reflected in the variability of Labrador Sea Water (LSW), which is largely controlled by the North Atlantic Oscillation, the first mode of the North Atlantic atmospheric variability. A combination of the amount of LSW, the overflows from the Nordic seas, and the second mode of atmospheric variability, the East Atlantic Pattern, explains 44% of the modeled decadal variability in the SPG strength. A prior increase in these components leads to an intensified SPG in the western subpolar region. Typically, an increase of one standard deviation (std dev) of the total overflow (1 std dev 5 0.2 Sv; 1 Sv [ 10 6 m 3 s 21 ) corresponds to an intensificationofaboutone-halfstddevoftheSPGstrength(1stddev 52 Sv).Asimilarresponseisfoundfor an increase of one std dev in the amount of LSW, and simultaneously the strength of the North Atlantic Current increases by one-half std dev (1 std dev 5 0.9 Sv).
影响因子：
3.6
作者：
Aksenov, Yevgeny;Ivanov, Vladimir V.;Beszczynska-Moeller, Agnieszka
通讯作者：
Beszczynska-Moeller, Agnieszka