GPCC全球月平均降水V4.0（1901-2019）

全球降水气候中心（the Global Precipitation Climatology Center，GPCC）：由世界气象组织（the World Meteorological Organization，WMO）主办的DWD（Deutscher Wetterdienst）管理。这里提供两种GPCC数据：一种是监测数据（Monitoring Data Product）。该产品是基于7 000个台站的质量控制资料。另一种是1951—2004年的完全数据（Full Data Product）。该产品是基于更多台站（超过43 000）的质量控制数据，其时间分布也很规则。这种产品优化了空间分布，用来进行水分平衡方面的研究。需要注意，GPCC提供的观测—分析格点数据产品还没有修正观测系统误差，但其提供了误差的气候学估计，并给出各格点所包括的台站数 。目前，GPCC 的完全数据的再分析V5.0版本（GPCC Full Data Reanalysis Version 5）已释放，其为2.5°×2.5°/1°×1°/0.5°×0.5°的再分析数据，是基于GPCC所有台站观测（64 400个台站的至少10年的数据）的，因此可用来进行全球和区域的水平衡研究、基于降水估计的遥感资料的订正以及模式验证，但在实际应用和评估中需要考虑某些格点和某些月份的台站数，尤其在一些观测稀疏的区域。注意：1969.2完全数据的再分析数据已于2011.1.20重新计算，2005.12，2006.1的数据于2011.4.18重新计算。

Global Precipitation Climatology Center (GPCC): Managed by DWD (Deutscher Wetterdienst), which is hosted by the World Meteorological Organization (WMO). Two types of GPCC data are provided here: one is the Monitoring Data Product, which is based on quality-controlled data from 7,000 stations; the other is the Full Data Product covering 1951-2004, which is based on quality-controlled data from more stations (over 43,000) with regular temporal distribution. This product has optimized spatial distribution and is used for research on water balance. It should be noted that the observation-analysis gridded data products provided by GPCC have not corrected observation system errors, but they provide climatological estimates of errors and the number of stations included in each grid point. Currently, the GPCC Full Data Reanalysis Version 5 has been released, which includes reanalysis data at resolutions of 2.5°×2.5°/1°×1°/0.5°×0.5° and is based on observations from all GPCC stations (at least 10 years of data from 64,400 stations). Thus, it can be used for global and regional water balance research, correction of remote sensing data based on precipitation estimates, and model validation. However, in practical applications and evaluations, the number of stations in certain grid points and certain months should be considered, especially in regions with sparse observations. Note: The reanalysis data of the Full Data for February 1969 was recalculated on January 20, 2011, and the data for December 2005 and January 2006 was recalculated on April 18, 2011.