Artificial cloud seeding using liquid carbon dioxide: Comparisons of experimental data and numerical analyses

Jinichiro Seto, Kikuro Tomine, Kenji Wakimizu, Koji Nishiyama

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

An artificial seeding experiment was carried out over the Genkai Sea, Japan, using liquid carbon dioxide. The seeded cloud was followed by an aircraft and radar at Kyushu University. A radar-echo intensity of 19 dBZ was formed in the seeded cloud where no radar echo was observed previously. The results of the experiment are analyzed using a numerical model [Weather Research and Forecasting Model (WRF), version 3.1] to evaluate the effects of the artificial seeding. The numerically simulated radar echo has a slightly stronger intensity and wider area than that observed. The results of the experiments were similar to those produced by the numerical model, however. Evaporation of cloud liquid water; growth of snow particles that is due to deposition, autoconversion, aggregation, and collection; and convection caused by released latent heat are shown in the numerical results as effects of the seeding experiment. The falling snow particles cause downward flow, which is compensated for by upward flow that causes the formation of new cloud liquid water as a secondary effect of seeding, although this secondary effect is confirmed only in the numerical results.

Original languageEnglish
Pages (from-to)1417-1431
Number of pages15
JournalJournal of Applied Meteorology and Climatology
Volume50
Issue number7
DOIs
Publication statusPublished - Jul 1 2011

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cloud seeding
seeding
carbon dioxide
radar
liquid
snow
experiment
aircraft
evaporation
convection
weather
water
effect
comparison
particle

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Artificial cloud seeding using liquid carbon dioxide : Comparisons of experimental data and numerical analyses. / Seto, Jinichiro; Tomine, Kikuro; Wakimizu, Kenji; Nishiyama, Koji.

In: Journal of Applied Meteorology and Climatology, Vol. 50, No. 7, 01.07.2011, p. 1417-1431.

Research output: Contribution to journalArticle

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