Cloud liquid water content responses to hygroscopic seeding of warm clouds

Kandalgaonkar, S. S.; Manohar, G. K.; Tinmaker, M. I. R.
August 2000
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p639
Academic Journal
The cloud liquid water content (CLWC) data in time and space from a total of 96 pairs of target (T) and control (C) experiments were analyzed in this study to compare the responses of CLWC to hygroscopic seeding of warm clouds. Our results of various approaches taken for this analysis have indicated significant modifications in the CLWC for the T clouds as against C clouds. Analysis of changes in CLWC in the T clouds after and before seeding have pointed out their increasing trend of values with increment in the number of seeded traverse in most cases. These results have shown that CLWC in the T clouds increases following the seeding treatment in the range 9-26%. Similar comparisons in the C clouds have indicated obvious diminution in CLWC that lies in the range 5-11%. These results are the clear indications of influence on microphysical growth and decay of such clouds that arises from hygroscopic seeding and not seeding respectively of warm clouds. Analysis of spatial responses of CLWC to seeding has shown that the optimum effect of seeding may be achieved for a suitable cloud in the altitude range 5750-6250 ft. (a.s.l.) in the Pune area. It is believed that this study has provided adequate support in favour of the hypothesis of hygroscopic seeding of warm clouds.


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