基于观测数据的2003-2014年北冰洋海平面时空特征  

Characteristics of the sea level in the Arctic Ocean based on observation data from 2003 to 2014

作　　者：郑璐曦 陈美香[1,2] 任杰 余佳霖[1,2] 陈宇洁 季韬 王雪竹 杨洁 Zheng Luxi;Chen Meixiang;Ren Jie;Yu Jialin;Chen Yujie;Ji Tao;Wang Xuezhu;Yang Jie(Key Laboratory of Marine Hazards Forecasting,Ministry of Natural Resources,Hohai University,Nanjing 210024,China;College of Oceanography,Hohai University,Nanjing 210024,China;School of Oceanography,Shanghai Jiao Tong University,Shanghai 200240,China;College of Environment,Hohai University,Nanjing 210024,China;College of Harbour,Coastal and Offshore Engineering,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 [3]上海交通大学海洋学院,上海200240 [4]河海大学环境学院,江苏南京210024 [5]河海大学港口海岸与近海工程学院,江苏南京210024

出　　处：《海洋学报》2022年第3期25-39,共15页

基　　金：国家重点研发计划(2017YFA0604600);国家自然科学基金(42076233,41806218);江苏省自然科学基金(BK20180510)。

摘　　要：本文对比了3个不同机构提供的北冰洋月均高度计数据,发现英国极地观测与建模中心和丹麦科技大学空间中心两套数据比较一致且空间覆盖率高,适用于北冰洋海平面变化研究,而前者在数据分辨率、平滑性和与验潮站的符合程度方面均更优。对高度计和验潮站数据的分析表明,北冰洋海平面的气候态特征表现为加拿大海盆的高值和欧亚海盆的低值之间形成鲜明对比;海平面的变化以季节变化和北极涛动引起的低频变化为主,加拿大海盆的季节和年际振幅均较大,俄罗斯沿岸海平面季节变化显著。2003-2014年,北冰洋平均海平面呈上升趋势,其中加拿大海盆海平面上升最快,而俄罗斯沿岸海平面有微弱下降趋势。加拿大海盆和俄罗斯沿岸由于海冰变化显著,不同高度计产品以及高度计与验潮站数据之间差别较大,使用时需慎重。Three monthly altimeter datasets of the Arctic Ocean are compared in this paper. The datasets provided by the Centre for Polar Observation and Modelling(CPOM) and Technical University of Denmark(DTU) are found to be consistent with each other and due to their high spapce coverage, are more suitable for the study of the sea level variation in the Arctic Ocean, the former is better in terms of spatial resolution, smoothness, and consistency with the tide gauge observation. Based on the data of both altimeter and tide gauge, the temporal and spatial characteristics of sea level in the Arctic Ocean are analyzed and the results show that the climatological sea level in the Arctic Ocean is represented by the striking contrast between the high values in the Canadian Basin and low values in the Eurasian basin. The variation of sea level in the Arctic Ocean is dominated by the seasonal variability and low-frequency variability associated with the Arctic Oscillation, large amplitudes of both the seasonal and inter-annual sea level variability are found in the Canadian Basin, and large seasonal variability occurs along the coast of Russia. During the period 2003-2014, the mean sea level of the Arctic Ocean is rising with the largest rising rate is found in the Canadian Basin, while the sea level in the Russian coastal area is declining slightly. It is also found that large uncertainty exists in the altimetry products of the Canadian Basin and the coast of Russia, as the difference both between altimetry products and between altimeter and tide gauge data cannot be ignored, data in these areas should be used with caution.

关 键 词：北冰洋 海平面 季节变化 低频变化 北极涛动 

分 类 号：P727[天文地球—海洋科学] P731.23