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Table 1

Selected precipitation predictors in August in the Danjiangkou basin

NumberPredictorRDescription (previous year)
ACI_2_26 0.526 The subtropical high ridge line in India (65 E–95 E) in February 
ACI _7_36 0.485 North Atlantic subtropical high on the north side of North America (110 W–60 E) in July 
ACI _2_56 −0.483 Northern hemisphere polar vortex centre (JW) in February 
ACI _3_64 −0.472 Asian meridional circulation index (IM, 60 E–150 E) in March 
ACI _11_63 −0.453 Asian zonal circulation index (IZ, 60 E–150 E) in November 
500 hpa_1_17.42 0.531 500 Hpa in January at (17.42) 
500 hpa_11_5.46 0.528 500 Hpa in November at (5.46) 
500 hpa_5_26.66 0.526 500 Hpa in May at (26.66) 
500 hpa_3_15.136 −0.520 500 Hpa in March at (15.136) 
10 500 hpa_8_17.69 0.518 500 Hpa in August at (17.69) 
11 SST_7_17.10 0.512 SST in July at (17.10) 
12 SST_5_21.33 0.510 SST in May at (21.33) 
13 SST_10_7.60 −0.507 SST in October at (7.60) 
14 SST_9_6.59 −0.487 SST in September at (6.59) 
15 SST_8_5.58 −0.474 SST in August at (5.58) 
NumberPredictorRDescription (previous year)
ACI_2_26 0.526 The subtropical high ridge line in India (65 E–95 E) in February 
ACI _7_36 0.485 North Atlantic subtropical high on the north side of North America (110 W–60 E) in July 
ACI _2_56 −0.483 Northern hemisphere polar vortex centre (JW) in February 
ACI _3_64 −0.472 Asian meridional circulation index (IM, 60 E–150 E) in March 
ACI _11_63 −0.453 Asian zonal circulation index (IZ, 60 E–150 E) in November 
500 hpa_1_17.42 0.531 500 Hpa in January at (17.42) 
500 hpa_11_5.46 0.528 500 Hpa in November at (5.46) 
500 hpa_5_26.66 0.526 500 Hpa in May at (26.66) 
500 hpa_3_15.136 −0.520 500 Hpa in March at (15.136) 
10 500 hpa_8_17.69 0.518 500 Hpa in August at (17.69) 
11 SST_7_17.10 0.512 SST in July at (17.10) 
12 SST_5_21.33 0.510 SST in May at (21.33) 
13 SST_10_7.60 −0.507 SST in October at (7.60) 
14 SST_9_6.59 −0.487 SST in September at (6.59) 
15 SST_8_5.58 −0.474 SST in August at (5.58) 

Note: ACI_2_26 reflects that the forecasted factor is the 26th factor (the subtropical high ridge line in India (65E–95E)) of the 74 atmospheric circulation factors in February one year before the forecasted year.

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