A Simplified Concept of Hygroscopic Seeding
AbstractA bulk-water microphysical convective cloud model is used to investigate the maximum effect of hygroscopic seeding. Using the fact that the desired cloud seeding effect is to transform the cloud from a continental one to a maritime one makes hygroscopic seeding a particularly easy process to simulate in bulk-water microphysics cloud models. In those types of cloud models, one only has to change the autoconversion threshold (i.e., the onset of coalescence) and the number concentration and dispersion characteristics of the cloud water to switch from a continental-type cloud to a maritime-type cloud. The continental cloud has no autoconversion, the maritime cloud an extremely efficient autoconversion process. Admittedly, this tests two extreme situations and makes the assumption that the effects of hygroscopic seeding will be somewhere between the two extremes, the maximum effect being represented by the maritime-type cloud. Very preliminary results indicate that the hygroscopic seeding would be quite efficient on small to moderate size clouds but its effect is much less definite on larger clouds. The dynamics of the clouds are crucial to the results.
How to Cite
Orville, H. D., Wang, C., & Kopp, F. J. (1998). A Simplified Concept of Hygroscopic Seeding. The Journal of Weather Modification, 30(1), 7–21. https://doi.org/10.54782/jwm.v30i1.259
Authors that submit papers for publication agree to the Journal’s copyright and publication terms. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the manuscript’s authorship and initial publication in Journal of Weather Modification. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in the Journal of Weather Modification. Authors are permitted to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process to encourage productive exchanges and greater citation of the published article.
Articles are published online using restricted access for the first year. After the first year, articles are made freely available online. Immediate open access for an article may be obtained by the author paying an open access fee which is in addition to the normal page changes. Authors are expected to honor a page charge in order to support publication and distribution of the journal. After the author approves the gallery formatted version for publication, the Weather Modification Association’s Secretary will invoice the corresponding author for the page charges and payment is due within 30 days.