为获取连续的高分辨率的海洋降水数据, 通过对8种海洋降水产品的时空覆盖范围和数据精度进行对比分析, 在此基础上提出一套优化权重系数法, 对8种降水资料进行了融合, 并利用中国沿海或海岛气象观测站实测降水数据对融合后的降水结果进行了对比验证。结果表明, 融合后的降水数据整体精度比较好, 数据的空间覆盖范围和时间跨度均得到改善, 优化的权重系数法是解决多源海洋降水数据信息冗余和互补问题的一种合适方案。
隋玉正
,
崔林丽
,
史军
,
李淑娟
. 一种多源全球海洋降水资料融合方法[J]. 热带海洋学报, 2016
, 35(2)
: 50
-56
.
DOI: 10.11978/2015037
To obtain a continuous high-resolution oceanic precipitation data, eight different oceanic precipitation products, including COADS, ECMWF, NCEP, GPCP_GPI, SSM/I_EMISS, SSM/I_SCATT, TRMM_PR, and TOPEX-TMR, were merged using an optimal weighted coefficient method to produce a new merged precipitation product. The product was obtained based on the spatial-temporal characteristics of these precipitation products and the principle of data merging. The merged product was validated using actual precipitation data from nine coastal rain gauge stations and the eight products. The merged precipitation product is better than the other data sets in terms of accuracy, and can compensate for the limitation of other multi-source precipitation products, suggesting that the optimal weighted coefficient method is an important scheme for reducing information redundancy and increasing the complementation of multi-source oceanic precipitation data sets.
[1] 何友, 王国宏, 陆大金, 等, 2007. 多传感器信息融合与应用[M]. 北京: 电子工业出版社: 1–2. HE Y, WANG G H, LU D J, et al, 2007. Multi-sensor information fusion and its application [M]. Beijing: Publishing House of Electronics Industry: 1–2 (in Chinese).
[2] BELLERBY T, TODD M, KNIVETON D, et al, 2000. Rainfall estimation from a combination of TRMM precipitation radar and GOES multi-spectral satellite imagery through the use of an artificial neural network [J]. Journal of Applied Meteorology, 39: 2115–2128.
[3] CHEN G., BERTRAND C, JEAN T, et al, 1997. Global oceanic precipitation: A joint view by TOPEX and the TOPEX microwave radiometer [J]. Journal of Geophysical Research, 102(5): 10457–10471.
[4] CHEN G., MA J, FANG C Y, et al, 2003. Global oceanic precipitation derived from TOPEX and TMR: climatology and variability [J]. Journal of Climate, 16: 3888–3904.
[5] ISEMER H J, 1992. Comparison of estimated and measured marine surface wind speed [C]//DIAZ H F, WOLTER K, WOODRUFF S D. Proceedings of the International COADS Workshop. Boulder, Colorado: US Dept of Commerce: 142–158.
[6] SOROOSHIAN S, GAO X, HSU K, et al, 2002. Diurnal variability of tropical rainfall retrieved from combined GOES and TRMM satellite information [J]. Journal of Climate, 15(9): 983–1001.
