Articles | Volume 24, issue 3
Research article
06 Feb 2024
Research article |  | 06 Feb 2024

Quantifying the contribution of atmospheric circulation to precipitation variability and changes in the US Great Plains and southwest using self-organizing map–analogue

Yizhou Zhuang and Rong Fu

Data sets

Complete ERA5 from 1940: Fifth generation of ECMWF atmospheric reanalyses of the global climate H. Hersbach et al.

CPC Unified Gauge-Based Analysis of Daily Precipitation over CONUS M. Chen and P. Xie

Pacific Decadal Oscillation (PDO) National Center for Environmental Information

Model code and software

SOM-Toolbox T. Vatanen

Short summary
This study investigated how atmospheric circulation affects precipitation variability and changes in the US Great Plains (GP) and southwest (SW). By developing a new method called self organizing map–analogue, we found that circulation significantly influences short-term precipitation variability, accounting for 54 %–61 % of the total variance. Furthermore, circulation contributes considerably to the multi-decadal changes in precipitation and its extremes, especially for the southern GP and SW.
Final-revised paper