气象
氣象
기상
METEOROLOGICAL MONTHLY
2015年
8期
970-979
,共10页
卫星反演降水%格点降水%评估%精度%时空变化
衛星反縯降水%格點降水%評估%精度%時空變化
위성반연강수%격점강수%평고%정도%시공변화
satellite-derived rainfall estimates%gridded precipitation%validation%accuracy%temporal and spatial characteristics
提采用2012—2013年国家气象信息中心2419个国家级地面气象站格点化数据和 TRMM（3B40RT、3B41RT、3B42RT）、CMORRH、GSMaR、HYDRO 共6种0．25°×0．25°卫星反演降水数据，从中国区域、中国东部区域及中国西部区域3种空间尺度综合验证和比较了日尺度上卫星反演降水产品的精度。结果表明：春、夏、秋季卫星反演降水产品对降水描述的准确性高于冬季。相关性、均方根误差等指标随季节变化明显，且差异较大，夏季每种降水产品的评估指标均优于冬季。不同区域之间定量评估指标差异明显，具有月尺度变化特征。卫星反演降水产品对冬季小降水及固态降水的反演能力有限。对于中国区域的大范围降水事件，每种降水产品可以较好进行再现，但均以多传感器联合后的产品质量较高，单一微波、红外或可见光的效果较差。TRMM 的3B42RT 在夏季对降水反演的落区较好，但极值偏大，CMORRH 的综合评价较好。卫星降水产品精度的空间分布与地形有一定的关系。
提採用2012—2013年國傢氣象信息中心2419箇國傢級地麵氣象站格點化數據和 TRMM（3B40RT、3B41RT、3B42RT）、CMORRH、GSMaR、HYDRO 共6種0．25°×0．25°衛星反縯降水數據，從中國區域、中國東部區域及中國西部區域3種空間呎度綜閤驗證和比較瞭日呎度上衛星反縯降水產品的精度。結果錶明：春、夏、鞦季衛星反縯降水產品對降水描述的準確性高于鼕季。相關性、均方根誤差等指標隨季節變化明顯，且差異較大，夏季每種降水產品的評估指標均優于鼕季。不同區域之間定量評估指標差異明顯，具有月呎度變化特徵。衛星反縯降水產品對鼕季小降水及固態降水的反縯能力有限。對于中國區域的大範圍降水事件，每種降水產品可以較好進行再現，但均以多傳感器聯閤後的產品質量較高，單一微波、紅外或可見光的效果較差。TRMM 的3B42RT 在夏季對降水反縯的落區較好，但極值偏大，CMORRH 的綜閤評價較好。衛星降水產品精度的空間分佈與地形有一定的關繫。
제채용2012—2013년국가기상신식중심2419개국가급지면기상참격점화수거화 TRMM（3B40RT、3B41RT、3B42RT）、CMORRH、GSMaR、HYDRO 공6충0．25°×0．25°위성반연강수수거，종중국구역、중국동부구역급중국서부구역3충공간척도종합험증화비교료일척도상위성반연강수산품적정도。결과표명：춘、하、추계위성반연강수산품대강수묘술적준학성고우동계。상관성、균방근오차등지표수계절변화명현，차차이교대，하계매충강수산품적평고지표균우우동계。불동구역지간정량평고지표차이명현，구유월척도변화특정。위성반연강수산품대동계소강수급고태강수적반연능력유한。대우중국구역적대범위강수사건，매충강수산품가이교호진행재현，단균이다전감기연합후적산품질량교고，단일미파、홍외혹가견광적효과교차。TRMM 적3B42RT 재하계대강수반연적락구교호，단겁치편대，CMORRH 적종합평개교호。위성강수산품정도적공간분포여지형유일정적관계。
Using grided data from 2419 stations of National Meteorological Information Centre during 2012-2013 and the TRMM (3B40RT,3B41RT,3B42RT),CMORRH,GSMaR,HYDRO satellite-derived rainfall data,this paper evaluated and discussed the validation of rainfall estimates from the six data with 0.25°×0.25°spatial resolution and the accuracy of the retrieved daily rainfall products over the whole Chi-na,Eastern China and Western China.Results show that the accuracy of satellite-derived data is higher in spring,summer and autumn than in winter.The linear correlation coefficient,mean absolute error (MAE),root mean square error (RMSE),probability of detection (ROD),and the false alarm ratio (FAR)change with seasons.Meanwhile,the index of each data is better in summer than in winter.The quantitative statistical metrics are obviously different,changing in monthly scale.The estimate ability of satellite-derived rainfall is poor when estimating solid and small-amount precipitation.For the large range of precipitation events over China,all the 6 rainfall products have better result.The better quality is real-ized by merging multi-sources,and the worse quality results from single-source microwave,infrared or vis-ible light.The 3B42RT retrieves better falling area of rainfall, but extreme value is larger. The comprehensive evaluation of the CMORRH is better than others.The spatial distribution of accuracy of satellite-derived rainfall is related to terrains of China.
