EC-thin资料在低槽冷锋类降水过程人工增雨潜力区识别中的应用

doi:10.3969/j.issn.1673-503X.2020.01.011

Abstract

Abstract:

Based on eight precipitation processes of low trough cold front in central-south Hebei, the actual observational data, microwave radiometer data, millimeter-wave cloud instrument data, and the EC-thin model data were used to investigate the application of EC-thin data in the identification of potential area of the artificial precipitation enhancement (APE).Results show that the common features of low trough cold front precipitation process are that the low trough moves eastward between middle and high level (30°-50°N, 100°-120°E) and the surface cold front affects central-south Hebei province along the path of northwest or west.No matter whether it is at plain or in mountainous area, low cloud cover (LC), total moisture content of gas column (TMC), atmospheric precipitation (AP) and specific humidity of 850 hPa (SH) generally increase with the increase of rainfall.When the central-south Hebei region is affected by the low trough cold front weather system, at the plain area, APE can be carried out when LC, TMC, AP, and the forecasted SH are above 60%, 31 kg·m^-2, 37 kg·m^-2, and 6 g·kg^-1, respectively.Whereas, in mountainous areas, APE can be carried out when LC, TMC, AP, and the forecasted SH are above 50%, 21 kg·m^-2, 29 kg·m^-2, and 4 g·kg^-1, respectively.In addition, the optimum APE stage is the moment at which the physical values start to decrease from the maximum.

Key words: Low-trough cold front, EC-thin model, Potential area for artificial precipitation enhancement

CLC Number:

P481

Pei-pei GENG,Cong-mei WANG,Zhi-xia LI,Wen-xia YANG. The application of EC-thin data in the identification of the potential area of artificial precipitation enhancement in the low trough cold front precipitation process[J]. Journal of Meteorology and Environment, 2020, 36(1): 82-88.

Figures/Tables 5

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References 20

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物理量		区域	降雨量/mm
物理量		区域	0—5	5—10	10—15	15—25	25—50
低云量/成	区间	平原	0—10	0—10	5—10	3—10	4—10
	区间	山区	0—9	5—10	5—10	8—10	8—10
	平均值	平原	6	6	8	8	8
	平均值	山区	5	7	9	9	9
气柱总含水量/(kg·m^-2)	区间	平原	20—55	21—55	28—56	30—56	32—59
	区间	山区	18—27	17—50	26—50	26—49	31—51
	平均值	平原	31	34	38	39	40
	平均值	山区	21	32	36	36	40
大气可降水量/(kg·m^-2)	区间	平原	21—68	23—70	33—71	35—70	37—72
	区间	山区	23—38	22—72	35—72	34—72	42—71
	平均值	平原	37	41	46	47	47
	平均值	山区	29	43	47	48	57
850 hPa比湿/(g·kg^-1)	区间	平原	2—13	3—13	2—12	3—11	4—11
	区间	山区	3—5	2—12	5—12	5—11	5—11
	平均值	平原	6	6	6	7	7
	平均值	山区	4	6	7	7	8

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The application of EC-thin data in the identification of the potential area of artificial precipitation enhancement in the low trough cold front precipitation process

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