Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay.
Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay.
复制标题
全新世冰间湖动力学及其与最北巴芬湾海洋热传输的相互作用。
DOI：
10.1038/s41598-021-88517-9
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发表时间：
2021-05-12
影响因子：
4.6
通讯作者：
Ribeiro S
中科院分区：
文献类型：
--
作者：
Jackson R;Kvorning AB;Limoges A;Georgiadis E;Olsen SM;Tallberg P;Andersen TJ;Mikkelsen N;Giraudeau J;Massé G;Wacker L;Ribeiro S
巴芬湾拥有最大和最多产的北极冰丛：北水（NOW）。尽管NOW在水团形成中具有重要意义和积极作用，但它在观测时代之后的历史仍然鲜为人知。我们通过对该地区两个跨越全新世的海洋沉积物岩心采用多代理方法，调和了以前未评估的长期NOW动态与海洋条件之间的关系。大西洋水对现在的影响减弱与区域记录是同步的，这些记录表明，从距今约4400年开始，一个强烈的、反复出现的冰湖开始出现，与新冰川期的冷却一致。在像罗马暖期这样温暖的全新世间隔，现在明显变弱，其影响海底条件的能力减弱，促进了大西洋水向北渗透。北极未来的变暖可能会对这片重要的生物绿洲产生负面影响，因为温暖的海水向北渗透，以及格陵兰岛西北海岸沿岸的海洋冰川融化加剧，可能会产生连锁反应。
Baffin Bay hosts the largest and most productive of the Arctic polynyas: the North Water (NOW). Despite its significance and active role in water mass formation, the history of the NOW beyond the observational era remains poorly known. We reconcile the previously unassessed relationship between long-term NOW dynamics and ocean conditions by applying a multiproxy approach to two marine sediment cores from the region that, together, span the Holocene. Declining influence of Atlantic Water in the NOW is coeval with regional records that indicate the inception of a strong and recurrent polynya from ~ 4400 yrs BP, in line with Neoglacial cooling. During warmer Holocene intervals such as the Roman Warm Period, a weaker NOW is evident, and its reduced capacity to influence bottom ocean conditions facilitated northward penetration of Atlantic Water. Future warming in the Arctic may have negative consequences for this vital biological oasis, with the potential knock-on effect of warm water penetration further north and intensified melt of the marine-terminating glaciers that flank the coast of northwest Greenland.
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影响因子：
2.3
作者：
Bennike, O;Björck, S
通讯作者：
Björck, S
影响因子：
1.1
作者：
JENNINGS, AE;HELGADOTTIR, G
通讯作者：
HELGADOTTIR, G
DOI：
10.1016/s0967-0645(02)00170-4
发表时间：
2002-01-01
影响因子：
3
作者：
Bâcle, J;Carmack, EC;Ingram, RG
通讯作者：
Ingram, RG
影响因子：
2.3
作者：
Andrews, John T.;Gibb, Olivia T.;Simon, Quentin
通讯作者：
Simon, Quentin
影响因子：
2.9
作者：
Bailey, Joscelyn N. -L.;Macdonald, Robie W.;Stern, Gary A.
通讯作者：
Stern, Gary A.