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The impact of concurrent variation of atmospheric meridional heat transport in western Baffen Bay and eastern Greenland on summer Arctic sea ice
Acta Oceanologica Sinica ( IF 1.4 ) Pub Date : 2020-08-30 , DOI: 10.1007/s13131-020-1614-0
Le Wang , Lujun Zhang , Wenfa Yang

Based on the climatological reanalysis data of the European Center for Medium-Range Weather Forecasts and the Arctic sea ice data of the National Snow and Ice Data Center, the relationship between the Arctic sea ice area (SIA) and the interannual variation of atmospheric meridional heat transport (AMHT) was analyzed. The results show that the atmospheric meridional heat transported by transient eddy (TAMHT) dominates the June AMHT in mid-high latitudes of the Northern Hemisphere, while the western Baffin Bay (B) and the eastern Greenland (G) are two gates for TAMHT entering the Arctic. TAMHT in the western Baffin Bay (B-TAMHT) and eastern Greenland (G-TAMHT) has a concurrent variation of reverse phase, which is closely related to the summer Arctic SIA. Possible mechanism is that the three Arctic atmospheric circulation patterns (AD, AO and NAO) in June can cause the concurrent variation of TAMHT in the B and G regions. This concurrent variation helps to maintain AD anomaly in summer through wave action and changes the polar air temperature, thus affecting the summer Arctic SIA. Calling the heat entering the Arctic as warm transport and the heat leaving Arctic as cold transport, then the results are classified into three situations based on B-TAMHT and G-TAMHT: warm B corresponding to cold G (WC), cold B corresponding to warm G (CW), cold B corresponding to cold G (CC), while warm B corresponding to warm G is virtually non-existent. During the WC situation, the SIA in the Pacific Arctic sediments and Kara Sea decreases; during the CW situation, the SIA in the Laptev Sea and Kara Sea decreases; during the CC situation, the SIA in the Kara Sea, Laptev Sea and southern Beaufort Sea increases.

中文翻译:

巴芬湾西部和格陵兰东部大气经向热传输同时变化对夏季北极海冰的影响

根据欧洲中距离天气预报中心的气候再分析数据和国家冰雪数据中心的北极海冰数据,得出北极海冰面积(SIA)与大气经向热量年际变化之间的关系运输(AMHT)进行了分析。结果表明,在北半球中高纬度地区,瞬变涡流(TAMHT)传递的大气子午热量占主导地位,而Baffin湾(B)和格陵兰岛东部(G)是TAMHT进入的两个门北极。巴芬湾西部(B-TAMHT)和东部格陵兰(G-TAMHT)的TAMHT具有同时发生的反相变化,这与夏季北极SIA密切相关。可能的机制是北极的三种大气环流模式(AD,AO和NAO)可能会导致B和G地区TAMHT同时发生变化。这种并发变化有助于通过波动作用在夏季维持AD异常并改变极地气温,从而影响夏季北极SIA。将进入北极的热量称为热传输,将离开北极的热量称为冷传输,然后根据B-TAMHT和G-TAMHT将结果分为三种情况:暖B对应冷G(WC),冷B对应于冷G(WC)。暖G(CW),冷B对应冷G(CC),而实际上不存在对应于暖G的暖B。在WC情况下,太平洋北极沉积物和卡拉海的SIA减少;在连续波情况下,拉普捷夫海和卡拉海的SIA减少;在CC形势下,卡拉海的SIA,
更新日期:2020-08-30
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