Development of Salt\|Seeding Scheme in [STHZ]3[STBZ]\|D Convective\= Cloud Model and Seeding Simulation

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Plateau Meteorology ›› 2013, Vol. 32 ›› Issue (2) : 491. DOI: 10.7522/j.issn.1000-0534.2012.00047

Development of Salt\|Seeding Scheme in [STHZ]3[STBZ]\|D Convective\= Cloud Model and Seeding Simulation

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Abstract

A salt-seeding scheme is developed in a 3-D convective cloud model, considering the microphysical processes between the salt particle and liquid and ice particles. Two prognostic variables are added: mixing ratio and number concentration of salt particle (\%Q\%\-n and \%N\%\-n). Using the salt-seeding model, a series of seeding simulations are made. Good seeding effect can be produced by 30 L-1 seeding dose with two times seeding, which can caused total rainfall increased 10%, the rain enhancement  effect is limited with less dose. Meanwhile, the total rainfall is reduced with  seeding dose  more than 1 000 L-1. Seeding time point also  affect net rain enhancement amount. Seeding and natural clouds own the same precipitation time period. After 70th min, the negative seeding effect appeares to the end of precipitation. Salt seeding changes not only the warm cloud processes, but also  the graupel and cold rain processes.

Key words

Salt seeding scheme / 3-D convective cloud / Seeding simulation.

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. Development of Salt\|Seeding Scheme in [STHZ]3[STBZ]\|D Convective\= Cloud Model and Seeding Simulation. Plateau Meteorology. 2013, 32(2): 491 https://doi.org/10.7522/j.issn.1000-0534.2012.00047

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