一套新的30年全球台站逐日降水资料集:质量控制和评估  

A Gauge-Based Global Daily Precipitation Dataset from 1980 to 2009: Quality Control and Evaluation

作　　者：聂肃平[1] 罗勇[1] 李伟平[1] 吴统文[1] 

机构地区：[1]中国气象局国家气候中心/气候研究开放实验室,北京100081

出　　处：《气候变化研究进展》2011年第4期235-242,共8页Climate Change Research

基　　金：国家自然科学基金项目(40905046;41075057);国家科技支撑项目(2009BAC51B03);科技部863重点项目(2009AA122000);中国气象局公益性行业专项(GYHY00706005)

摘　　要：对来自全球无线通讯系统(GTS)1980—2009年全球台站逐日降水资料进行质量控制和检验评估。有效地过滤了错误和不可靠的观测记录,构建了一套新的全球台站逐日降水资料集。利用CMAP和GPCP降水产品进行的检验评估表明,新资料集月降水具有良好的频率分布和空间结构一致性。新资料集与CMAP和GPCP降水的全球平均时间相关系数从质量控制前的0.24提高到0.70左右,均方根误差则从12 mm/d减小到1 mm/d。在亚洲,新资料集与CMAP和GPCP具有一致的年际变化特征。在全球不同地区,新资料集的季节变化与CMAP和GPCP较为吻合。A serial of quality control （QC） procedures were performed on a gauge-based global daily precipitation dataset from the Global Telecommunication System （GTS） for the period 1998-2009. A new global precipitation dataset was constructed after the control procedures. The new dataset was evaluated using CMAP and GPCP precipitation products. The results show that the frequency and spatial distribution of monthly precipitation in the new dataset well agree with those in CMAP and GPCP. The global mean correlation coefficient between gauge precipitation and CMAP/GPCP precipitation increased from 0.24 before QC to 0.70 after QC, accordingly, and the root mean square error decreased form 12 mrn/d to 1 mm/d. The interannual variability of monthly precipitation in the new dataset is consistent with that of the CMAP/GPCP in Asia; and the seasonal variability of precipitation in different regions over the world coincides with those of CMAP/GPCP quite well.

关 键 词：全球地面天气报 逐日降水 质量控制 检验评估 

分 类 号：P468.024[天文地球—大气科学及气象学]