Observed Trends in Summertime Precipitation over the Southwestern United States

Aerosol and Precipitation Chemistry in the Southwestern United States : Spatiotemporal Trends

16 17 This study characterizes the spatial and temporal patterns of aerosol and precipitation 18 composition at six sites across the United States Southwest between 1995 and 2010. Precipitation 19 accumulation occurs mostly during the wintertime (December February) and during the 20 monsoon season (July September). Rain and snow pH levels are usually between 5 – 6, with 21 crustal-derived speci...

Aerosol and precipitation chemistry in the southwestern United States: spatiotemporal trends and interrelationships.

This study characterizes the spatial and temporal patterns of aerosol and precipitation composition at six sites across the United States Southwest between 1995 and 2010. Precipitation accumulation occurs mostly during the wintertime (December-February) and during the monsoon season (July-September). Rain and snow pH levels are usually between 5-6, with crustal-derived species playing a major r...

Variations in the summertime atmospheric hydrologic cycle associated with seasonal precipitation anomalies over the southwestern US

Observed and model-simulated diurnal cycles of precipitation over the contiguous United States

We analyzed diurnal variations in precipitation, surface pressure, and atmospheric static energy over the United States from observations and NCAR regional climate model (RegCM) simulations. Consistent with previous studies, the mean (1963-1993) pattern of the diurnal cycle of summer U.S. precipitation is characterized by late afternoon maxima over the Southeast and the Rocky Mountains and midn...

AMO-Forced Regional Processes Affecting Summertime Precipitation Variations in the Central United States

Numerous previous studies have provided insight into the influence of the Atlantic multidecadal oscillation (AMO) on North American precipitation. However, these studies focused on large-scale processes, and additional studies are needed to gain understanding of local and regional processes that develop in different phases of the AMO and substantiate its influences on precipitation. In this stu...