Affiliation:
1. Pacific Northwest National Laboratory Richland WA USA
2. Environmental Science Division Argonne National Laboratory Lemont IL USA
3. Department of Civil, Environmental and Geospatial Engineering Michigan Technological University Houghton MI USA
Abstract
AbstractGiven the critical role of precipitation on hydroclimate, we quantified the contributions of moisture source regions to precipitation in the Great Lakes Region (GLR) using multiple reanalysis data sets. Results show that the Great Plains (GPs) and the GLR itself are the primary sources of moisture. The moisture sources for the double peaks in the GLR precipitation that occur in June and September are identified, which is caused by a shift in the peak timing of moisture contribution from the GLR and GPs. In particular, moisture from the GPs contributes more to the heavy precipitation, while moisture from the GLR contributes more to the light precipitation. We also found a statistically significant (p < 0.05) increasing trend in the moisture contribution from the mid‐Pacific, caused by an intensified zonal moisture transport from the mid‐Pacific through changes in atmospheric circulation.
Funder
U.S. Department of Energy
Publisher
American Geophysical Union (AGU)
Subject
General Earth and Planetary Sciences,Geophysics