Numerical study of the cloud seeding effects

1990 ◽  
Vol 42 (2) ◽  
pp. 145-164 ◽  
Author(s):  
M. Ćurić ◽  
D. Janc
Keyword(s):  
Numerical Study ◽  
Cloud Seeding ◽  
Seeding Effects

Implementation of a Silver Iodide Cloud-Seeding Parameterization in WRF. Part II: 3D Simulations of Actual Seeding Events and Sensitivity Tests

2013 ◽  
Vol 52 (6) ◽  
pp. 1458-1476 ◽  
Author(s):  
Lulin Xue ◽  
Sarah A. Tessendorf ◽  
Eric Nelson ◽  
Roy Rasmussen ◽  
Daniel Breed ◽  
...  
Keyword(s):  
Silver Iodide ◽  
Winter Season ◽  
Wrf Model ◽  
Reanalysis Data ◽  
Atmospheric Conditions ◽  
Cloud Seeding ◽  
The North ◽  
Cloud Properties ◽  
Regional Reanalysis ◽  
Seeding Effects

AbstractFour cloud-seeding cases over southern Idaho during the 2010/11 winter season have been simulated by the Weather Research and Forecasting (WRF) model using the coupled silver iodide (AgI) cloud-seeding scheme that was described in Part I. The seeding effects of both ground-based and airborne seeding as well as the impacts of model physics, seeding rates, location, timing, and cloud properties on seeding effects have been investigated. The results were compared with those from Part I and showed the following: 1) For the four cases tested in this study, control simulations driven by the Real-Time Four Dimensional Data Assimilation (RTFDDA) WRF forecast data generated more realistic atmospheric conditions and precipitation patterns than those driven by the North America Regional Reanalysis data. Sensitivity experiments therefore used the RTFDDA data. 2) Glaciogenic cloud seeding increased orographic precipitation by less than 1% over the simulation domain, including the Snake River basin, and by up to 5% over the target areas. The local values of the relative precipitation enhancement by seeding were ~20%. Most of the enhancement came from vapor depletion. 3) The seeding effect was inversely related to the natural precipitation efficiency but was positively related to seeding rates. 4) Airborne seeding is generally more efficient than ground-based seeding in terms of targeting, but its efficiency depends on local meteorological conditions. 5) The normalized seeding effects ranged from 0.4 to 1.6 under various conditions for a certain seeding event.

scholarly journals Review of Wintertime Orographic Cloud Seeding

1986 ◽  
Vol 43 ◽  
pp. 87-104 ◽  
Author(s):  
Robert D. Elliott
Keyword(s):  
Scientific Literature ◽  
Doppler Radar ◽  
Cloud Seeding ◽  
Weather Modification ◽  
The Past ◽  
Orographic Clouds ◽  
The 1960S ◽  
Orographic Cloud ◽  
Microwave Radiometers ◽  
Seeding Effects

Abstract This review provides a sketchy background of orographic weather modification activities prior to the 1960s, followed by a more critical review of major orographic projects carried out and reported in the scientific literature during the past 25 years. In the earlier of these major projects, evaluation of results had been based largely upon comparisons of seeded and nonseeded precipitation experimental units stratified by various sounding-derived parameters in an attempt to amplify the physical significance of the seeding effects within various sub-types of orographic clouds. The later major projects are still underway with no final evaluations having been presented. However, a wealth of significant data analyses have been reported that provide important insights into the various natural and seeding precipitation mechanisms. Much of this is attributable to the new observational tools in use, which include airborne and ground microphysical sensors, doppler radar, and microwave radiometers.

Cloud Seeding Effects on Different Daily Rainfall Amounts

1971 ◽  
Vol 10 (5) ◽  
pp. 1002-1005
Author(s):  
T. L. Ogden ◽  
K. O. L. F. Jayaweera
Keyword(s):  
Daily Rainfall ◽  
Cloud Seeding ◽  
Seeding Effects

Radar Detection of Cloud-Seeding Effects

Science ◽  
1981 ◽  
Vol 213 (4513) ◽  
pp. 1250-1252 ◽  
Author(s):  
P. V. HOBBS ◽  
J. H. LYONS ◽  
J. D. LOCATELLI ◽  
K. R. BISWAS ◽  
L. F. RADKE ◽  
...  
Keyword(s):  
Radar Detection ◽  
Cloud Seeding ◽  
Seeding Effects

SOME PROBLEMS IN EVALUATING CLOUD SEEDING EFFECTS OVER EXTENSIVE AREAS

1967 ◽  
pp. 209-222
Author(s):  
Glenn W Brier ◽  
Thomas H. Carpenter ◽  
Dwight B. Kline
Keyword(s):  
Cloud Seeding ◽  
Seeding Effects
Sign in / Sign up

Export Citation Format

Share Document