烏蒙山區3種大氣可降水量反演法的異同
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公益性行業科研專項“我國西南非絕熱加熱敏感區綜合觀測試驗”(GYHY201006054)、“十二五”國家科技支撐計劃課題“西南突發性災害應急與防控技術集成與示范”(2012BAD20B06)資助


Similarities and Differences of Three Methods for Retrieving Atmospheric Precipitable Water in Wumeng Mountain Area
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    摘要:

    選取大氣可降水量的地基GPS水汽遙感法,探空反演法以及經驗公式計算法,以貴州西部的威寧作為研究個例,對比分析3種方法在烏蒙山區對大氣可降水量反演的異同。以探空反演結果作為基準值,得出地基GPS遙感水汽值和經驗公式計算值較基準值偏大,3個方法的反演值之間具有很好的相關性,地基GPS遙感水汽值與探空反演值之間的相關性最好,平均絕對誤差值最小,為3.5 mm,均方根誤差為4.14 mm。在烏蒙山區,對流層加權平均溫度(Tm)的本地經驗公式與探空計算值之間的平均誤差為1.1 K,本地Tm公式對大氣可降水量反演的結果影響較小。有降水事件發生及昆明準靜止鋒常駐的11月至次年4月,GPS水汽反演精度較高,平均絕對誤差僅為1 mm。5—10月,經驗計算方法的計算精度較高,平均絕對誤差為0.74 mm。

    Abstract:

    Selecting three calculation methods of atmospheric precipitable water: groundbased GPS remote sensing water vapor, radiosonde data inversion, and empirical formula methods, taking Weining as an example, the similarities and differences of three methods in the Wumeng Mountain area are analyzed. It is concluded that selecting the radiosonde inversion value as the baseline, the results of GPS remote sensing and empirical formulas are bigger than the baseline; there is a good correlation among three values, especially between GPS remote sensing and radiosonde inversion; the minimum average absolute error value is 3.5 mm and the root mean square error is 4.14 mm. The empirical formulas of the weighted mean tropospheric temperature for the Wumeng mountain area is established, with the average error between empirical formulas and baseline is 1.1 K. The empirical formulas of weighted average〖WTBX〗 〖WTBZ〗air temperature have little influence on the atmospheric precipitable water. The GPS inversion accuracy of water vapor is higher when there is precipitation and the quasistationary front over Kunming between November and April, with the average absolute error being only 1 mm. The average absolute error between radiosonde inversion and experience calculation is 0.74 mm from May to October.

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廖留峰,谷曉平,惠小英.烏蒙山區3種大氣可降水量反演法的異同[J].氣象科技,2015,43(3):387~392

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  • 收稿日期:2014-05-22
  • 定稿日期:2014-12-30
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  • 在線發布日期: 2015-06-30
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