MOSAiC现场观测期间海冰厚度季节变化模拟误差分析  

Simulation error diagnosis of the seasonal evolution of sea ice thickness during MOSAiC in-situ observation

作　　者：陆洋 赵海波 赵嘉炜 王晓春 何宜军 雷瑞波[3] 喻小勇 Lu Yang;Zhao Haibo;Zhao Jiawei;Wang Xiaochun;He Yijun;Lei Ruibo;Yu Xiaoyong(School of Marine Sciences,Nanjing University of Information Science and Technology,Nanjing 210044,China;SANYA Oceanograph-ic Laboratory,Sanya 572024,China;Key Laboratory of Polar Science,Ministry of Natural Resources,Polar Research Institute of China,Shanghai 200136,China;School of Atmosphere and Remote Sensing,Wuxi University,Wuxi 214105,China)

机构地区：[1]南京信息工程大学海洋科学学院,江苏南京210044 [2]三亚海洋实验室,海南三亚572024 [3]中国极地研究中心自然资源部极地科学重点实验室,上海200136 [4]无锡学院大气与遥感学院,江苏无锡214105

出　　处：《海洋学报》2024年第6期26-39,共14页

基　　金：国家重点研发计划(2021YFC2803301,2018YFA0605904);国家自然科学基金委项目(42376200);高分辨率南海海洋动力环境要素构建技术研究(SOLZSKY2024005)。

摘　　要：北极气候研究多学科漂流观测计划(Multidisciplinary drifting Observatory for the Study of Arctic Climate, MOSAiC)于2019年10月至2020年9月开展,期间获得了变量完整的大气、海洋、海冰厚度及积雪厚度观测,为海冰模式的发展提供了新的契机。本研究利用两个完整观测时段(2019年11月1日至2020年5月7日、2020年6月26日至7月27日)的大气和海洋强迫场,驱动一维海冰柱模式ICEPACK,模拟了MOSAiC期间海冰厚度的季节演变,同海冰厚度观测进行了对比,并诊断分析了海冰厚度模拟误差的原因。结果表明,在冬春季节,模式可以再现海冰厚度增长过程,但由于模式在春季高估了积雪向海冰的转化及对海冰物质平衡的贡献,模拟的春季海冰厚度偏厚。在夏季期间,2种热力学方案及3种融池方案的组合都表明模式高估了海冰表层的消融过程,导致模拟结束阶段的海冰厚度偏薄。我们的研究表明,使用变量完整的MOSAiC大气和海洋强迫场可以诊断目前海冰模式中的问题,为海冰模式的改进奠定基础。The Multidisciplinary drifting Observatory for the Study of Arctic Climate(MOSAiC)was conducted from October 2019 to September 2020,yielding complete observations of atmosphere,ocean,sea ice thickness(SIT),and snow thickness.These observations provide new opportunities for the development of sea ice models.In this study,the seasonal evolution of SIT during MOSAiC was simulated using the ICEPACK sea ice model and at-mospheric and oceanic forcing observations from two periods without missing data(from November 1,2019 to May 7,2020;from June 26 to July 27,2020).The simulation was compared with SIT observation and the reasons for SIT simulation errors were diagnosed.The results show that,in the winter and spring seasons,the model can reproduce the increase in SIT,but overestimates the transition from submerged snow to sea ice and its contribution to sea ice mass balance.This causes the overestimation of SIT in spring.During the summer season,the combination of two thermodynamic schemes and three melt pond schemes indicates that the model overestimates the sea ice surface melting,resulting in thinner SIT at the end of simulation period.Our research demonstrates that the MOSAiC atmo-spheric and oceanic observation with all variables needed to force ICEPACK can be used to diagnose current sea ice models and very useful for their future improvements.

关 键 词：MOSAiC观测计划 热力学方案 融池方案 ICEPACK海冰模式 海冰厚度 积雪深度 北冰洋 

分 类 号：P731.15[天文地球—海洋科学]