Impact of meltwater on high-latitude early Last Interglacial climate
Impact of meltwater on high-latitude early Last Interglacial climate
复制标题
融水对高纬度末次间冰期早期气候的影响
DOI：
10.5194/cp-12-1919-2016
复制
发表时间：
2016
影响因子：
4.3
通讯作者：
E. Wolff
中科院分区：
文献类型：
--
作者：
E. Stone;E. Capron;D. Lunt;A. Payne;J. Singarayer;P. Valdes;E. Wolff
抽象的。最近对最后一次间冰期早期的数据汇编表明，在130 ka处有两极温度响应，北大西洋的温度比现在低，南大洋和南极洲的温度比现在的温度高。然而，当气候模型框架中只考虑轨道和温室气体强迫作用时，这一时期的气候模型模拟一直无法再现这种反应。使用全复杂的大气环流模式，我们进行了代表130 ka条件的气候模式模拟，其中包括从此时的数据得出的淡水强迫的强度。我们发现，在冰期-间冰期转变期间，北半球残存冰盖的融化水产生了类似于在130kb ka观测到的北大西洋低于目前的温度的模拟气候响应，并通过两极跷跷板机制导致南大洋的温度高于目前的温度。在进一步的模拟中，西南极冰盖也被移除，导致东南极和南大洋变暖，但并没有明显改善模型与数据的比较。这一综合的模型-数据方法提供了证据，表明北半球淡水强迫是末次冰期早期气候演变的重要参与者。
Abstract. Recent data compilations of the early Last Interglacial period have indicated a bipolar temperature response at 130 ka, with colder-than-present temperatures in the North Atlantic and warmer-than-present temperatures in the Southern Ocean and over Antarctica. However, climate model simulations of this period have been unable to reproduce this response, when only orbital and greenhouse gas forcings are considered in a climate model framework. Using a full-complexity general circulation model we perform climate model simulations representative of 130 ka conditions which include a magnitude of freshwater forcing derived from data at this time. We show that this meltwater from the remnant Northern Hemisphere ice sheets during the glacial–interglacial transition produces a modelled climate response similar to the observed colder-than-present temperatures in the North Atlantic at 130 ka and also results in warmer-than-present temperatures in the Southern Ocean via the bipolar seesaw mechanism. Further simulations in which the West Antarctic Ice Sheet is also removed lead to warming in East Antarctica and the Southern Ocean but do not appreciably improve the model–data comparison. This integrated model–data approach provides evidence that Northern Hemisphere freshwater forcing is an important player in the evolution of early Last Interglacial climate.
登录
查看更多内容
影响因子：
14.6
作者：
Martijn Gough
通讯作者：
Martijn Gough
影响因子：
5.2
作者：
X. Zhang;M. Prange;U. Merkel;M. Schulz
通讯作者：
X. Zhang;M. Prange;U. Merkel;M. Schulz
影响因子：
4.3
作者：
P. Holden;N. Edwards;E. Wolff;N. Lang;J. Singarayer;P. Valdes;T. Stocker
通讯作者：
P. Holden;N. Edwards;E. Wolff;N. Lang;J. Singarayer;P. Valdes;T. Stocker
影响因子：
64.8
作者：
Boehm, E.;Lippold, J.;Deininger, M.
通讯作者：
Deininger, M.
影响因子：
4
作者：
Bauch, Henning A.;Kandiano, Evguenia S.;Erlenkeuser, Helmut
通讯作者：
Erlenkeuser, Helmut