| ZENG Tao,SHI Lijian,MARKO Makynen,CHENG Bin,ZOU Juhong,ZHANG Zhiping. 2016. Sea ice thickness analyses for the Bohai Sea using MODIS thermal infrared imagery. Acta Oceanologica Sinica, 35(7):96－104 |
| Sea ice thickness analyses for the Bohai Sea using MODIS thermal infrared imagery |
| 基于MODIS热红外数据的渤海海冰厚度反演 |
| Received:September 25, 2015 Revised:January 13, 2016 |
| DOI：10.1007/s13131-016-0908-8 |
| Key words:sea ice thickness MODIS Bohai Sea ice surface temperature thermal infrared |
| 中文关键词: 海冰厚度 MODIS 渤海 海冰表面温度 热红外 |
| 基金项目:The Chinese Polar Environment Comprehensive Investigation & Assessment Programs under contract No. CHINARE-02-04; the International Science and Technology Cooperation Project of China under contract No. 2011DFA22260; the Open Research Fund of Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences under contract No. 2014LDE009; the Public Science and Technology Research Funds Projects of Ocean under contract No.201105016; the Academy of Finland under contract No.259537; the National Natural Science Foundation of China under contract No. 41428603. |
| Author Name | Affiliation | E-mail | | ZENG Tao | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081 China | | | SHI Lijian | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081 China
Finnish Meteorological Institute, Helsinki FI-00101, Finland | shilj@mail.nsoas.org.cn | | MARKO Makynen | Finnish Meteorological Institute, Helsinki FI-00101, Finland | | | CHENG Bin | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081 China | | | ZOU Juhong | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081 China | | | ZHANG Zhiping |
1 National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
2 Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081 China
3 Finnish Meteorological Institute, Helsinki FI-00101, Finland
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| Abstract: |
| Level ice thickness distribution pattern in the Bohai Sea in the winter of 2009-2010 was investigated in this paper using MODIS night-time thermal infrared imagery. The cloud cover in the imagery was masked out manually. Level ice thickness was calculated using MODIS ice surface temperature and an ice surface heat balance equation. Weather forcing data was from the European Centre for Medium-Range Weather Forecasts (ECMWF) analyses. The retrieved ice thickness agreed reasonable well with in situ observations from two off-shore oil platforms. The overall bias and the root mean square error of the MODIS ice thickness are -1.4 cm and 3.9 cm, respectively. The MODIS results under cold conditions (air temperature < -10℃) also agree with the estimated ice growth from Lebedev and Zubov models. The MODIS ice thickness is sensitive to the changes of the sea ice and air temperature, in particular when the sea ice is relatively thin. It is less sensitive to the wind speed. Our method is feasible for the Bohai Sea operational ice thickness analyses during cold freezing seasons. |
| 中文摘要: |
| 本文利用MODIS夜间的热红外数据对2009-2010年渤海冬季的海冰厚度开展反演研究，海冰的厚度反演主要采用了MODIS海冰表面温度数据和海冰表面热力学平衡理论。研究过程中云的覆盖区域通过人工目视的方法进行了手动剔除，使用的气象数据来自欧洲中尺度气象预报中心（ECMWF）。通过与两个石油平台上获取的实测数据的比对发现，本文的反演结果与实测数据能有较好的匹配，平均误差和均方根误差分别为-1.4cm和3.9cm。将反演结果与Lebedev和Zubov模型模拟的海冰厚度比对发现，MODIS反演的海冰厚度在气温低于-10℃时能与之有较好的一致性。通过模型计算发现，当海冰较薄时，反演的海冰厚度值对冰温和气温十分敏感，但对风速的敏感性较低。本文的研究为渤海冬季结冰期海冰冰厚的业务化监测提供了一种可能性。 |
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