| 摘要: |
| 利用2013 年1 月1 日～2013 年12 月31 日的ASCAT 散射计风速数据, 从海面风速季平均分布特征、平均海面风速特征、海面风速大于10 m/s 发生比例统计等方面, 对55°S 以南的南极周边海域开展了风速空间分布特性统计, 得到以下结果: 7 月平均风速最大, 为12 m/s, 1 月平均风速最小, 为8 m/s。对于南极周边海域, 区域平均风速主要在9～12 m/s, 全年出现的时间大于280 d, 约占全年的77%。风速大于10 m/s 所占比例4～9 月大于1～3 月和10～12 月。从全年来看, 南极周边海域在4～9 月风速普遍较大, 且0°～60°W 海域内风速明显比其他海域要小。在此基础上将2013 年每日的区域平均风速与月平均风速与2012 年做了对比, 变化趋势与2012 年基本一致。通过本项长期工作, 可以了解南极风场环境基本情况, 建立与更新基础资料和图件, 得到南极地区风场要素时空分布、变化规律, 服务于南极科学考察、全球变化等多学科研究应用。 |
| 关键词: ASCAT 散射计 风速 南极周边海域 |
| DOI：10.11759/hykx20141011015 |
| 分类号: |
| 基金项目:南极环境综合考察与评估专项资助项目(CHINARE2013-02-04) |
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| Analysis of sea surface wind speed in the South Pole peripheral sea in 2013 with the Advanced SCATterometer sea wind data |
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| Abstract: |
| Statistical analysis of spatial and temporal distribution characteristics of the sea surface wind field in the South Pole peripheral sea at south latitude of 55°～90°, using the Advanced SCATterometer (ASCAT) scatter meter wind field data from Jan.1, 2013 to Dec. 31, 2013. The results show that: in the South Pole peripheral sea, the maximum monthly mean wind speed was 12 m/s, appeared in July; the minimum monthly mean wind speed was 8 m/s, appeared in January. The regional average wind speed is 9～12 m/s, which appeared in more than 280 days in 2013. The proportion of the wind with a speed >10 m/s in April to September is greater than that in January to March and October to December. For the full year of 2013, the wind speed in April to September is greater than that in January to March and October to December, the wind speed at 0°～60°W is obviously less than that in other region of the South Pole peripheral sea. The change tendencies of daily and monthly average wind speeds in 2013 were similar with those in 2012. Through this long-term work, we can understand the basic situation of the Antarctic wind field environment, establish and update the basic information and maps, the wind field spatio-temporal distribution and variation in Antarctic area, to serve the Antarctic scientific expedition, global change and other multidisciplinary research application. |
| Key words: the Advanced SCATterometer (ASCAT) wind field the South Pole peripheral sea |
