冰核观测中两种滤膜采样方法的比较

doi:10.3969/j.issn.1673-503X.2021.05.008

Abstract

Abstract:

Atmospheric ice nucleus observation is a basic work for studying natural cold cloud precipitation and artificial weather modification, and the filter-diffusion cloud chamber method is one of the main methods for observing ice nucleus concentration. To evaluate the influence of the two filter collection methods on the observation results of ice nuclei, a parallel sampling experiment was carried out from 2011 to 2015 with a self-made atmospheric particulate sampler and an FA-3 impact 9-stage sampler. The results show that despite the ice nucleus concentration observed by the self-made sampler was several times or even tens of times higher than that of the 9-level sampler, they varied simultaneously in various seasons and meteorological conditions. The self-made sampler was suitable for the study on the total ice nucleus concentration distribution and physical/chemical characteristics in the atmosphere, while the 9-level sampler was suitable for the study on the atmospheric ice nucleus concentration, scale distribution, and physical/chemical characteristics of the various particle diameter sections of PM₁₀. The underestimation of the number of ice nuclei by the filter method was proportional to the sampling volume. Changing the pumping flow of the sampler's air pump and controlling the sampling volume had a significant influence on improving the "volume effect".

Key words: Atmospheric ice nuclei, Aerosol sampler, Microporous membrane, Static diffusion cloud chamber

CLC Number:

P426.3

De-ping ZHOU, Jin-guang ZHANG, Gang CHEN, Cheng-long LI, Ye HONG, Hang SU, Yang-feng WANG. Comparison of two filter collection methods in ice nucleus observation[J]. Journal of Meteorology and Environment, 2021, 37(5): 49-55.

Figures/Tables 6

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References 22

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序号	日期	观测时间	天气现象	9级采样器		自制采样器
序号	日期	观测时间	天气现象	采样体积/L	样本(组)	采样体积/L	样本(组)
1	20110505	08:08-12:11	阴，雨后	2374	2	11.3 / 5.4	2
2	20110507	08:18-12:13	晴转多云	1709	2	7.6 / 7.9	2
3	20110512	10:29-19:29	浮尘	2247/2735	4	4.9 / 4.3 / 4.8 / 4.9	4
4	20110513	10:40-13:40	浮尘	1758	2	3.9 / 4.8	2
5	20110530	10:50-14:55	阴，雨前	2393	2	3.8 / 4.6	2
6	20120428	14:06-17:26	晴	1953	2	9.8	1
7	20120429	10:53-13:53	晴	1757	2	9.5	1
8	20120430	11:01-14:01	晴，雨前	1757	2	9.4	1
9	20120501	10:48-14:49	阵雨	2353	2	7.8	1
10	20120502	10:58-16:58	阵雨	3515	2	9.8	1
11	20120503	10:35-14:38	晴	2373	2	10.5	1
12	20151214	10:23-14:03	霾	1826	4	7.2 / 7.2	2
13	20151215	14:02-21:02	晴	3486	4	14.0 / 32.8 / 18.6 / 21.4 20.3 / 20.1 / 20.4	7
14	20151215-16	22:00-06:00	晴	3984	2	28.6 / 18.6	2
15	20151216	07:00-12:40	晴	2822	2	22.0/ 21.7 / 18.5	3
16	20151221	12:35-15:35	霾	1494/823	4	28.1 / 14.3	2
17	20151223	13:12-15:42	重度霾	1245/660	4	6.0 / 7.4	2
18	20151225	09:00-11:48	轻度污染，雪前	1394/1364	4	13.5 / 11.3	2
19	20151225-26	19:44-00:03	小雪	2149	2	32.8 / 28.6	2
20	20151226	06:49-11:29	雪后，阴转晴	2324	2	57.3 / 36.4	2

粒级	2015年12月21日			2015年12月23日			2015年12月25日
粒级	N_28.3	N_15.0	N_28.3/N_15.0	N_28.3	N_15.0	N_28.3/N_15.0	N_28.3	N_15.0	N_28.3/N_15.0
8	0.170	0.233	0.73	0.009	0.037	0.26	0.048	0.134	0.36
7	0.177	0.276	0.64	0.017	0.026	0.67	0.206	0.241	0.86
6	0.092	0.287	0.32	0.017	0.018	0.93	0.195	0.274	0.71
5	0.148	0.264	0.56	0.026	0.118	0.22	0.401	0.437	0.92
4	0.213	0.350	0.61	0.186	0.395	0.47	0.613	0.680	0.90
3	0.029	0.049	0.60	0.085	0.181	0.47	0.434	0.568	0.76
2	0.034	0.065	0.52	0.235	0.489	0.48	0.536	0.518	1.03
1	0.040	0.062	0.64	0.301	0.730	0.41	0.561	0.753	0.74
0	0.150	0.323	0.46	0.296	0.667	0.44	0.541	0.775	0.70
总计	1.053	1.909	0.55	1.172	2.661	0.44	3.535	4.380	0.81

[1]	ZHOU De-ping, SU Hang, GENG Shu-jiang, WANG Yang-feng, HONG Ye, LIU Ning-wei. Aircraft observation of atmospheric ice nuclei concentration in Liaoning and Shenyang regions [J]. Journal of Meteorology and Environment, 2018, 34(6): 133-139.
[2]	ZHOU De-ping,LI Bing-kun,CHEN Guang,HONG Ye,ZHANG Yun-hai,WAN Zhi-hong,DONG Guo-ping. An observational study of atmospheric ice nuclei concentration using 5 L mixing cloud chamber in Fushun, Liaoning province [J]. Journal of Meteorology and Environment, 2012, 28(6): 43-49.

Comparison of two filter collection methods in ice nucleus observation

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