极地研究

极地研究 ›› 2010, Vol. 21 ›› Issue (2-English): 180-192.DOI: 10.3724/SP.J.1085.2010.00180

• 研究论文 • 上一篇    下一篇

A Coupled Regional Arctic Sea Ice-Ocean Model: Configuration and Application

Li Qun(李群)1*, Zhang Lu(张璐)1,2 and Wu Huiding(吴辉碇)1
  

  1. 1 Polar Research Institute of China, Shanghai, 200136, China
    2 The Second Institute of Oceanography，SOA, Hangzhou 310012, China
  • 收稿日期:2010-06-29 修回日期:2010-09-28 出版日期:1960-06-30 发布日期:1960-06-30
  • 通讯作者: 李群
  • 基金资助:

    国家科技支撑计划;中国极地科学战略研究基金

A Coupled Regional Arctic Sea Ice-Ocean Model: Configuration and Application

Li Qun(李群)1*, Zhang Lu(张璐)1,2 and Wu Huiding(吴辉碇)1
  

  1. 1 Polar Research Institute of China, Shanghai, 200136, China
    2 The Second Institute of Oceanography，SOA, Hangzhou 310012, China
     
  • Received:2010-06-29 Revised:2010-09-28 Online:1960-06-30 Published:1960-06-30
  • Contact: li qun

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摘要：

A regional sea ice ocean coupled model for the Arctic Ocean was developed, based on the MITgcm ocean circulation model and classical Hibler79 type two category thermodynamicsdynamics sea ice model. The sea ice dynamics and thermodynamics were considered based on Viscous Plastic (VP) and Winton three layer models, respectively. A detailed configuration of coupled model has been introduced. Special attention has been paid to the model grid setup, subgrid paramerization, ice ocean coupling and open boundary treatment. The coupled model was then applied and two test run examples were presented. The first model run was a climatology simulation with 10 years (1992—2002) averaged NCAR/NCEP reanalysis data as atmospheric forcing. The second model run was a seasonal simulation for the period of 1992—2007. The atmospheric forcing was daily NCAR/NCEP reanalysis. The climatology simulation captured the general pattern of the sea ice thickness distribution of the Arctic, i.e., the thickest sea ice is situated around the Canada Archipelago and the north coast of the Greenland. For the second model run, the modeled September Sea ice extent anomaly from 1992—2007 was highly correlated with the observations, with a linear correlation coefficient of 0.88. The minimum of the Arctic sea ice area in the September of 2007 was unprecedented. The modeled sea ice area and extent for this minimum was overestimated relative to the observations. However, it captured the general pattern of the sea ice retreat.

关键词: MITgcm, Sea Ice, Arctic Ocean, Regional Model, Climate Change

Abstract:

A regional sea ice ocean coupled model for the Arctic Ocean was developed, based on the MITgcm ocean circulation model and classical Hibler79 type two category thermodynamicsdynamics sea ice model. The sea ice dynamics and thermodynamics were considered based on Viscous Plastic (VP) and Winton three layer models, respectively. A detailed configuration of coupled model has been introduced. Special attention has been paid to the model grid setup, subgrid paramerization, ice ocean coupling and open boundary treatment. The coupled model was then applied and two test run examples were presented. The first model run was a climatology simulation with 10 years (1992—2002) averaged NCAR/NCEP reanalysis data as atmospheric forcing. The second model run was a seasonal simulation for the period of 1992—2007. The atmospheric forcing was daily NCAR/NCEP reanalysis. The climatology simulation captured the general pattern of the sea ice thickness distribution of the Arctic, i.e., the thickest sea ice is situated around the Canada Archipelago and the north coast of the Greenland. For the second model run, the modeled September Sea ice extent anomaly from 1992—2007 was highly correlated with the observations, with a linear correlation coefficient of 0.88. The minimum of the Arctic sea ice area in the September of 2007 was unprecedented. The modeled sea ice area and extent for this minimum was overestimated relative to the observations. However, it captured the general pattern of the sea ice retreat.

Key words: MITgcm, Sea Ice, Arctic Ocean, Regional Model, Climate Change