摘要
北极作为全球气候变化响应和反馈最为敏感的区域之一,对全球大气、海洋环流等都有着深远持久的影响。尤其是第四纪以来,北极冰盖的反复变化和海平面的波动不仅影响着白令海峡的关闭与开启、水团交换和洋流系统的变化,同时还影响着北冰洋边缘海陆架的暴露与淹没。西伯利亚极地海域,包括楚科奇海、东西伯利亚海和拉普捷夫海,作为环北冰洋最为宽阔的浅水陆架区,其在第四纪冰期-间冰期旋回中经历了海洋环境的重大变化。利用北冰洋主要边缘海——楚科奇海、东西伯利亚海和拉普捷夫海所开展的第四纪以来古海洋环境的研究成果,通过对比分析上述三个海域多指标重建的古海洋环境演变与古气候记录,全面系统地了解第四纪以来西伯利亚极地海域的古海洋环境演变历史,发现古洋流、古海平面、古海水温盐度等古海洋环境因子的变化,除在根本上要受地球轨道参数的周期性波动所引起的太阳入射辐射量的变化和地壳构造运动的影响外,还受到各种正负反馈机制和放大效应引起的北极冰盖扩张和退缩、冰川地壳均衡补偿、入海径流变化等因素的影响,为今后北极古海洋古气候研究工作的开展提供借鉴。
The Arctic is one of the most sensitive areas to global climate change because of its strong influence on global thermohaline circulation and atmospheric circulation.In particular,changes in Arctic sea ice and sea level have affected the opening and closure of the Bering Strait,water mass exchange and ocean circulation,as well as exposure of Arctic continental margins.The Chukchi,East Siberian and Laptev seas are the largest marginal seas in the Arctic Ocean and have undergone significant oceanographic changes during glacial–interglacial cycles.In this review,we present Quaternary oceanographic and climatic changes in the Chukchi,East Siberian and Laptev seas,and then discuss advantages and disadvantages of different paleoceanographic and paleoenvironmental records based on a diverse range of proxies.In the comparatively comprehensive and systematic body of research on Quaternary paleoceanography of the Siberian Arctic seas,we found that paleoceanographic records(i.e.oceanography,sea level,sea surface temperature and salinity,sea ice)were influenced by changes in the Earth’s orbit and the amount of radiant energy reaching the Earth,as well as ice sheet mass balance,sea level changes and Arctic river discharge.We also provide suggestions for future paleoclimate and paleoceanographic research in this region.
作者
贾福福
沙龙滨
李冬玲
刘焱光
Jia Fufu;Sha Longbin;Li Dongling;Liu Yanguang(Department of Geography and Spatial Information Technology,Ningbo University,Ningbo 315211,China;Laboratory for Marine Geology,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266061,China;Key Laboratory of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,MNR,Qingdao 266061,China.)
出处
《极地研究》
CAS
CSCD
北大核心
2020年第2期250-263,共14页
Chinese Journal of Polar Research
基金
国家自然科学基金(41776193,41876215,41876070)
青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室开放基金(MGQNLM201707)
南北极环境综合考察与评估专项(CHINARE03-02)
山东省重大科技创新工程专项(2018SDKJ0104)资助。
