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ASCAT近岸风场产品与近岸浮标观测风场对比

谢小萍 魏建苏 黄亮

谢小萍, 魏建苏, 黄亮. ASCAT近岸风场产品与近岸浮标观测风场对比. 应用气象学报, 2014, 25(4): 445-453..
引用本文: 谢小萍, 魏建苏, 黄亮. ASCAT近岸风场产品与近岸浮标观测风场对比. 应用气象学报, 2014, 25(4): 445-453.
Xie Xiaoping, Wei Jiansu, Huang Liang. Evaluation of ASCAT coastal wind product using nearshore buoy data. J Appl Meteor Sci, 2014, 25(4): 445-453.
Citation: Xie Xiaoping, Wei Jiansu, Huang Liang. Evaluation of ASCAT coastal wind product using nearshore buoy data. J Appl Meteor Sci, 2014, 25(4): 445-453.

ASCAT近岸风场产品与近岸浮标观测风场对比

资助项目: 

公益性行业 (气象) 科研专项 GYHY201206001, GYHY201106006

详细信息
    通信作者:

    谢小萍, email: lucia129@126.com

Evaluation of ASCAT Coastal Wind Product Using Nearshore Buoy Data

  • 摘要: 利用美国西海岸7个近岸浮标2012年全年和中国近岸8个气象浮标2012年1—6月的风场观测数据,检验了卫星散射计ASCAT近岸风场产品中的风速和风向在近岸海域的精度。检验结果表明:在美国西海岸近岸海域,ASCAT近岸风场产品中的风速与浮标的风速一致性高,但ASCAT近岸风场产品中风向的精度受离岸距离、风速和风向等因素的影响,在离岸近的海域ASCAT近岸风场产品与浮标观测风场的一致性较差。统计发现,将低风速 (不超过3 m·s-1) 剔除可明显提高ASCAT近岸风场产品在近岸海域的精度。另外,ASCAT近岸风场产品的风向精度在不同风向上存在差异,表现为从陆地吹向海洋风向精度较小,而从海洋吹向陆地风向精度较高。在中国近岸海域,受地形影响,渤海海域ASCAT近岸风场产品与气象浮标观测的风向差异大,在其他近岸海域的ASCAT近岸风场产品和气象浮标的观测风场的对比结果与美国西海岸风场的对比结果特征相似。
  • 图  1  用于ASCAT近岸风场产品检验的美国西海岸近岸浮标站分布

    Fig. 1  Location of 7 nearshore buoys off US West Coast used to evaluate ASCAT coastal wind product

    图  2  用于ASCAT近岸风场产品检验的中国近岸浮标站分布

    Fig. 2  Location of 8 nearshore buoys off China Coast used to evaluate ASCAT coastal wind product

    图  3  2012年ASCAT近岸风场与美国西海岸近岸浮标风速和风向相关分布

    Fig. 3  Correlation coefficients between ASCAT coastal wind products and US West Coastal buoy wind observations in 2012

    图  4  ASCAT近岸风场与美国西海岸近岸浮标风速和风向偏差直方统计图 (a) 风速偏差, (b) 风向偏差

    Fig. 4  differences between ASCAT coastal wind products and US West Coastal buoy observations (a) wind speed, (b) wind direction

    图  5  ASCAT近岸风场与美国西海岸近岸浮标风速和风向均方根误差风玫瑰图

    (a) 风速均方根误差 (单位:m·s-1), (b) 风向均方根误差 (单位:(°))

    Fig. 5  Wind rose diagram of root mean square error between ASCAT coastal wind products and US West Coastal buoy observations

    (a) wind speed root mean square error (unit:m·s-1), (b) wind direction root mean square error (unit:(°))

    图  6  2012年1—6月ASCAT近岸风场与中国渤海海域气象浮标平均偏差的风玫瑰图 (单位:(°))

    Fig. 6  Wind rose diagram of wind direction mean error between ASCAT coastal wind products and nearshore buoy data of Bohai Sea in China from January to June in 2012(unit:(°))

    表  1  NDBC浮标信息列表

    Table  1  Information list of the NDBC buoys

    浮标号纬度经度测风高度/m离岸距离/km
    4601338.242°N123.301°W522
    4601439.235°N123.974°W517
    4602741.850°N124.381°W513
    4602835.741°N121.884°W541
    4604147.349°N124.708°W534
    4604236.785°N122.469°W535
    4608632.491°N118.034°W585
    下载: 导出CSV

    表  2  中国近岸浮标信息列表

    Table  2  Information list of China nearshore buoys

    浮标号纬度经度测风高度/m离岸距离/km
    5455839.25°N120.58°E1057
    5464138.85°N118.55°E108
    5857329.75°N122.75°E1034
    5876827.53°N121.40°E1039
    5895125.50°N120.32°E1045
    5933423.64°N118.20°E1054
    5951522.33°N117.34°E10110
    5976520.75°N111.66°E1085
    下载: 导出CSV

    表  3  ASCAT近岸风场与美国西海岸近岸浮标对比

    Table  3  Comparison between ASCAT coastal wind products and US West Coastal buoy wind observations

    浮标号匹配样本量风速平均偏差/(m·s-1)风向平均偏差/(°)风速相关系数风向相关系数
    460132980.8222.690.970.78
    460142821.5925.110.930.57
    460271782.1431.720.900.55
    460283490.7715.020.970.87
    460413340.9225.700.960.67
    460423280.7416.520.960.78
    460863540.6821.860.940.74
    下载: 导出CSV

    表  4  根据风速等级划分的ASCAT近岸风场和美国西海岸近岸浮标观测风场对比

    Table  4  Comparison between ASCAT coastal wind products and US West Coastal buoy wind observations according to wind speed

    类型样本量风速平均偏差/(m·s-1)风向平均偏差/(°)风速相关系数风向相关系数
    全部样本21231.021.890.940.71
    风速不大于3 m·s-15481.1550.80.260.39
    风速大于3 m·s-115750.9611.830.940.84
    下载: 导出CSV

    表  5  ASCAT近岸风场与中国近岸浮标对比

    Table  5  Comparison between ASCAT coastal wind products and China nearshore buoy wind observations

    浮标号样本量风速平均偏差/(m·s-1)风向平均偏差/(°)风速相关系数风向相关系数
    545582041.33136.100.940.06
    546411418.3753.630.420.55
    585732742.4836.270.870.77
    587681961.1230.180.960.95
    589511731.2738.040.970.78
    593341241.6040.860.960.83
    595151371.1526.920.980.93
    597651601.0629.640.960.92
    下载: 导出CSV

    表  6  根据风速等级划分的ASCAT近岸风场和中国近岸浮标对比

    Table  6  Comparison result between ASCAT coastal wind products and China nearshore buoy wind observations according to wind speed

    分类样本量风速平均偏差/(m·s-1)风向平均偏差/(°)风速相关系数风向相关系数
    全部样本14091.7032.730.920.63
    风速不大于3 m·s-12532.0065.800.300.40
    风速大于3 m·s-111561.5518.200.930.73
    下载: 导出CSV
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  • 收稿日期:  2013-10-24
  • 修回日期:  2014-04-16
  • 刊出日期:  2014-07-31

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