Related Experiment Video
Updated: Aug 9, 2026
12:50
Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds
Published on: September 26, 2017
Re-evaluation of the Arizona cloud-seeding experiment
J Neyman1, H B Osborn, E L Scott
1Statistical Laboratory, University of California, Berkeley, Calif. 94720.
Summary
Cloud seeding in Arizona
Area of Science:
- Atmospheric Science
- Meteorology
- Weather Modification
Background:
- Cloud seeding is a weather modification technique.
- The Arizona experiment investigated cloud seeding effects over seven years.
Purpose of the Study:
- To evaluate the impact of cloud seeding on precipitation in the Santa Catalina Mountains.
- To analyze diurnal variations in precipitation and seeding effectiveness.
Main Methods:
- Statistical analysis of 24-hour and hourly precipitation data.
- Comparison of precipitation amounts on seeded versus unseeded days.
- Analysis stratified by specific weather conditions (South-East days) and time of day.
Main Results:
- A 30% apparent loss in average 24-hour precipitation (P=0.06).
- A 34% apparent loss considering only rainy days (P=0.03).
- A 40% apparent loss observed on South-East days (P=0.03).
Conclusions:
- Cloud seeding may lead to a reduction in rainfall.
- Further research is needed to confirm findings on seeding effectiveness and diurnal variations.
- Two distinct responses to seeding (rain increase and decrease) were suggested, requiring independent verification.
More Related Videos
10:19A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
Published on: November 21, 2015
09:55Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
Published on: December 12, 2013
