巴伦支海近40年来海洋热含量变化特征及影响机制  

Variations and controlling mechanisms on ocean heat content in the Barents Sea over the past four decade

作　　者：赖颖 王雪竹 葛志成 陈姣 陈美香[1,2] Lai Ying;Wang Xuezhu;Ge Zhicheng;Chen Jiao;Chen Meixiang(Key Laboratory of Marine Hazards Forecasting,Ministry of Natural Resources,Hohai University,Nanjing 210024,China;College of Oceanography,Hohai University,Nanjing 210024,China)

机构地区：[1]河海大学自然资源部海洋灾害预报技术重点实验室,江苏南京210024 [2]河海大学海洋学院,江苏南京210024

出　　处：《极地研究》2023年第2期183-196,共14页Chinese Journal of Polar Research

基　　金：江苏省自然科学基金(BK20180510);自然资源部海洋环境科学与数值模拟重点实验室开放基金(2020-ZD-01);国家自然科学基金(41806218)资助。

摘　　要：利用ORAS5海洋-海冰再分析数据集,研究发现1979—2018年间巴伦支海海洋热含量存在显著的季节和年际变化特征,且有持续上升趋势。海-气热通量是控制巴伦支海海洋热含量季节变化的主要因素,而北大西洋流的海洋热输运则影响其年际变化和上升趋势。北大西洋流的温度和流速变化对其海洋热输运的年际变化均有贡献,而其海洋热输运的上升趋势则主要是来自于北大西洋流温度的增加。此外,巴伦支海开阔海域和冰区的海-气热交换呈现相反的趋势,在无海冰覆盖的开阔海域,海洋放热减少,海洋混合减弱;而在有海冰覆盖的海域,海洋放热则显著增加,海洋混合增强。Based on the ORAS5 reanalysis dataset,it is shown that the ocean heat content(OHC)in the Barents Sea exists significant seasonal cycle,interannual variability and increasing trend during 1979–2018.The air-sea heat flux dominates the seasonal cycle of OHC,while the interannual variability and long-term trend of OHC are mostly impacted by the oceanic heat transport of the Atlantic inflow.Both the temperature and transport can explain the interannual variability of the oceanic heat transport carried by the Atlantic inflow,however,the enhancement of the oceanic heat transport is almost determined by the increased inflow temperature.Besides,we found distinct differences in air-sea heat exchanges associated with sea ice conditions in the Barents Sea:The ocean surface heat loss reduced and the mixed layer depth became shallower in the open water while the ocean surface heat loss was enhanced and the mixed layer depth deepened in the sea ice covered area.

关 键 词：巴伦支海 海洋热含量 海洋热输运 海-气热通量 

分 类 号：P73[天文地球—海洋科学]