| 2018年北极太平洋区域夏季海冰物理及光学性质的研究 |
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| 引用本文： | 曹晓卫,卢鹏,雷瑞波,王庆凯,李志军.2018年北极太平洋区域夏季海冰物理及光学性质的研究[J].海洋学报(英文版),2020,39(9):25-37. |
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| 作者姓名： | 曹晓卫 卢鹏 雷瑞波 王庆凯 李志军 |
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| 作者单位： | 大连理工大学, 海岸和近海工程国家重点实验室, 大连, 116024;极地研究中心, 自然资源部极地科学重点实验室, 上海, 200136 |
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| 基金项目： | The National Key Research and Development Program of China under contract Nos 2017YFE0111400 and 2018YFA0605903; the National Natural Science Foundation of China under contract Nos 41922045, 41876213 and 51579024. |
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| 摘 要： | The reduction in Arctic sea ice in summer has been reported to have a significant impact on the global climate. In this study, Arctic sea ice/snow at the end of the melting season in 2018 was investigated during CHINARE-2018, in terms of its temperature, salinity, density and textural structure, the snow density, water content and albedo, as well as morphology and albedo of the refreezing melt pond. The interior melting of sea ice caused a strong stratification of temperature, salinity and density. The temperature of sea ice ranged from –0.8℃ to 0℃, and exhibited linear cooling with depth. The average salinity and density of sea ice were approximately 1.3 psu and 825 kg/m~3, respectively, and increased slightly with depth. The first-year sea ice was dominated by columnar grained ice. Snow cover over all the investigated floes was in the melt phase, and the average water content and density were 0.74% and 241 kg/m~3, respectively. The thickness of the thin ice lid ranged from 2.2 cm to 7.0 cm, and the depth of the pond ranged from 1.8 cm to 26.8 cm. The integrated albedo of the refreezing melt pond was in the range of 0.28–0.57. Because of the thin ice lid, the albedo of the melt pond improved to twice as high as that of the mature melt pond. These results provide a reference for the current state of Arctic sea ice and the mechanism of its reduction.
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| 关 键 词： | 海冰 积雪 冻结融池 物理性质 反照率 |
| 收稿时间： | 2019/10/22 0:00:00 |
Physical and optical characteristics of sea ice in the Pacific Arctic Sector during the summer of 2018 |
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| Cao Xiaowei,Lu Peng,Lei Ruibo,Wang Qingkai,Li Zhijun.Physical and optical characteristics of sea ice in the Pacific Arctic Sector during the summer of 2018[J].Acta Oceanologica Sinica,2020,39(9):25-37. |
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| Authors: | Cao Xiaowei Lu Peng Lei Ruibo Wang Qingkai Li Zhijun |
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| Institution: | 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China2.MNR Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China |
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| Abstract: | The reduction in Arctic sea ice in summer has been reported to have a significant impact on the global climate. In this study, Arctic sea ice/snow at the end of the melting season in 2018 was investigated during CHINARE-2018, in terms of its temperature, salinity, density and textural structure, the snow density, water content and albedo, as well as morphology and albedo of the refreezing melt pond. The interior melting of sea ice caused a strong stratification of temperature, salinity and density. The temperature of sea ice ranged from –0.8°C to 0°C, and exhibited linear cooling with depth. The average salinity and density of sea ice were approximately 1.3 psu and 825 kg/m3, respectively, and increased slightly with depth. The first-year sea ice was dominated by columnar grained ice. Snow cover over all the investigated floes was in the melt phase, and the average water content and density were 0.74% and 241 kg/m3, respectively. The thickness of the thin ice lid ranged from 2.2 cm to 7.0 cm, and the depth of the pond ranged from 1.8 cm to 26.8 cm. The integrated albedo of the refreezing melt pond was in the range of 0.28–0.57. Because of the thin ice lid, the albedo of the melt pond improved to twice as high as that of the mature melt pond. These results provide a reference for the current state of Arctic sea ice and the mechanism of its reduction. |
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| Keywords: | sea ice snow refreezing melt pond physical properties albedo |
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