Great Lakes Coordinated Monthly Precipitation Data

Coordinated Monthly Precipitation Data Information (1900-2021) This dataset consists of the coordinated amount of monthly precipitation that has fallen over the basin areas of the different Great Lakes. The data are presented in both mm and inches. Most of the processing is done by the US Army Corps of Engineers Detroit Office using models developed by that agency and the Great Lakes Environmental Research Lab (GLERL) of NOAA. The data is then verified by Environment and Climate Change Canada. Different methods used to calculate monthly precipitation for certain periods in record period. For more information on data sources reference this paper: *https://www.glerl.noaa.gov/pubs/fulltext/2015/20150006.pdf An advancement made in most recent period, beginning in 1948. Data from 1948 to present calculated through AHPS model with GLERL DTP method. GLERL DTP method uses a group of meteorological stations surrounding the Great Lakes basin to calculate precipitation. In a recent study, it was found that some of the stations in the group were reporting erroneous data in recent years. Therefore, station list updated. Also, AHPS model replaced with GLSHFS model. GLSHFS uses same method for calculating precipitation. With the model change to GLSHFS and the method's (GLERL DTP) improved station list, precipitation data updated back to 1948. Period Current Method** Previous Method** 1900-1930 USACE-AWD USACE-AWD 1931-1947 GLERL-MTP GLERL-MTP 1948-2017 GLERL-DTP (GLSHFS) GLERL-DTP (AHPS) 2018-YYYY GLERL-DTP (GLSHFS) *Citation: Hunter, T. S., Clites, A. H., Campbell, K. B., & Gronewold, A. D. (2015). Development and application of a North American Great Lakes hydrometeorological database—Part I: Precipitation, evaporation, runoff, and air temperature. Journal of Great Lakes Research, 41(1), 65-77. **Acronyms AHPS: Advanced Hydrologic Prediction System AWD: Areally Weighted District DTP: Daily Thiessen Program GLERL: Great Lakes Environmental Research Laboratory GLSHFS: Great Lakes Seasonal Hydrological Forecasting System MTP: Monthly Thiessen Polygon USACE: United States Army Corps of Engineers# 协同月度降水数据集（1900-2021年） 本数据集涵盖五大湖各流域的协同月度降水量数据，数据单位同时包含毫米（mm）与英寸（in）。数据集的大部分处理工作由美国陆军工程兵团（United States Army Corps of Engineers, USACE）底特律办事处完成，所用模型由该机构与美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）下属的大湖环境研究实验室（Great Lakes Environmental Research Lab, GLERL）联合开发，最终数据由加拿大环境与气候变化部（Environment and Climate Change Canada）完成校验。 本数据集针对记录周期内的特定时段，采用了差异化的月度降水量计算方案。如需查阅数据来源的详细信息，请参阅以下论文：*https://www.glerl.noaa.gov/pubs/fulltext/2015/20150006.pdf 自1948年起，数据集迎来首次重大迭代升级。1948年至今的降水数据采用大湖环境研究实验室每日泰森程序（GLERL DTP）结合高级水文预报系统（Advanced Hydrologic Prediction System, AHPS）模型进行计算。近期一项研究发现，该组气象站点中的部分站点近年存在数据错报问题，因此数据集更新了所用气象站点列表。 此外，原所用的高级水文预报系统（AHPS）模型已替换为大湖季节水文预报系统（Great Lakes Seasonal Hydrological Forecasting System, GLSHFS），二者采用相同的降水量计算方法。结合模型切换至GLSHFS以及每日泰森程序（DTP）优化后的站点列表，数据集完成了1948年以来所有降水数据的更新。 | 时段 | 当前计算方法** | 既往计算方法** | |------|----------------|----------------| | 1900-1930 | USACE-AWD | USACE-AWD | | 1931-1947 | GLERL-MTP | GLERL-MTP | | 1948-2017 | GLERL-DTP (GLSHFS) | GLERL-DTP (AHPS) | | 2018-YYYY | GLERL-DTP (GLSHFS) | - | *参考文献： Hunter, T. S., Clites, A. H., Campbell, K. B., & Gronewold, A. D. (2015). 北美五大湖水文气象数据库的开发与应用——第一部分：降水、蒸发、径流与气温. 《大湖研究杂志》, 41(1), 65-77. **缩写对照表： AHPS: 高级水文预报系统（Advanced Hydrologic Prediction System） AWD: 区域加权分区法（Areally Weighted District） DTP: 每日泰森多边形程序（Daily Thiessen Program） GLERL: 大湖环境研究实验室（Great Lakes Environmental Research Laboratory） GLSHFS: 大湖季节水文预报系统（Great Lakes Seasonal Hydrological Forecasting System） MTP: 月度泰森多边形法（Monthly Thiessen Polygon） USACE: 美国陆军工程兵团（United States Army Corps of Engineers）