A Global Climatology for January, April, July, and October

Surface and Upper air climatology. Upper air climatology interpolated from data supplied by NCAR from DS200.0 [http://rda.ucar.edu/datasets/ds200.0/]and DS205.0 [http://rda.ucar.edu/datasets/ds205.0/], and data supplied by NOAA, USAF (ETAC), and others.地表及高空气候学。高空气候数据源自美国国家大气研究中心（NCAR）提供的DS200.0 [http://rda.ucar.edu/datasets/ds200.0/]和DS205.0 [http://rda.ucar.edu/datasets/ds205.0/]数据集，以及美国国家海洋和大气管理局（NOAA）、美国空军（USAF）环境技术应用中心（ETAC）等机构提供的数据。