CAJ | 학술논문

提利用124个测站2011—2012年6—8月逐小时降水资料，分辨率为0．25°×0．25°的 TRMM 估测降水和 DEM 高程数据，采用相关系数、相对误差和准确性指标，分析了西藏高原 TRMM 估测降水整体表现能力及海拔高度对降水估测影响。结果表明：TRMM 估测降水在西藏高原整体趋势较一致，降水量级偏大，次数偏多；平均无降水准确率远高于平均有降水准确率，漏测率低而空测率高，降水量大的测站 TRMM 估测能力相对强。西藏高原上大部分测站处于相对低洼（河谷）地带，海拔高度差较小的区域 TRMM 估测降水与测站降水误差小，较大的区域误差则大。
제이용124개측참2011—2012년6—8월축소시강수자료，분변솔위0．25°×0．25°적 TRMM 고측강수화 DEM 고정수거，채용상관계수、상대오차화준학성지표，분석료서장고원 TRMM 고측강수정체표현능력급해발고도대강수고측영향。결과표명：TRMM 고측강수재서장고원정체추세교일치，강수량급편대，차수편다；평균무강수준학솔원고우평균유강수준학솔，루측솔저이공측솔고，강수량대적측참 TRMM 고측능력상대강。서장고원상대부분측참처우상대저와（하곡）지대，해발고도차교소적구역 TRMM 고측강수여측참강수오차소，교대적구역오차칙대。
Using hourly precipitation observation data from 124 stations during the period from June to Au-gust,2011-2012,TRMM estimated precipitation data with 0.25°×0.25°resolution,DEM elevation da-ta,the correlation coefficient,relative error and accuracy index,the TRMM precipitation estimate ability in Tibetan and the elevation effect on precipitation estimation are analyzed.The results show that TRMM precipitation estimation trend in the plateau is consistent with larger precipitation intensity and more fre-quency.The average accuracy without precipitation is much higher than mean accuracy rate of precipitati-on,the missing rate is lower and false alarm is higher.The TRMM data have better estimate ability on the observation station with more rains.The observing sites of Tibetan are mostly located in relatively low-ly-ing area (valley).When the elevation error between observating stations and surrounding areas is small, the precipitation error between TRMM and observation is small.On the contrary,precipitation error be-comes larger when the elevation error is larger.