The method to classify circulation patterns is obliquely rotated Principal Components in T-mode (PCT) because of its temporal and spatial stability (Huth, 1996a, Huth, 1996b). In T-mode, the grid point values are arranged in rows and daily patterns in columns. The classification was done in cost733 software, which has been developed in several variants (Philipp et al., 2016), especially for classifications.
种类型的大气天气循环模式显示925 hPa的位势高度(GH)场(彩色阴影)和风矢量场(箭头)。每个图案的出现频率也标记在每个面板的右上角。











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