SUMMER RAINFALL VARIABILITY
; AMERICAN TELECONNECTION PATTERN
; UNITED-STATES CLIMATE
; NORTH-AMERICAN
; RIVER FLOWS
; PRECIPITATION
; INTENSIFICATION
; MOUNTAINS
; FREQUENCY
; PACIFIC
WOS学科分类:
Meteorology & Atmospheric Sciences
WOS研究方向:
Meteorology & Atmospheric Sciences
英文摘要:
The hydroclimatology of the southeastern U.S. is changing, with increased precipitation, intensified summer-to-fall rainfall, and prolonged dry periods. However, research has yet to determine whether these trends are present in the southern Appalachian Mountains, which contain the most topographic and hydroclimatic variability across the region and serve as a valuable resource for growing population centers. This study examines warm season hydroclimatic variability and changes from 1950 to 2018 using the Global Historical Climatological Network (GHCN) daily data record. Daily rainfall is classified according to different intensities, ranging from light to heavy, and a Mann-Kendall test is used to determine the trend at each station. Additionally, a Spearman's rank correlation test is performed to test for significant linkages between precipitation class frequencies and large-scale modes of atmospheric variability (Atlantic Multidecadal Oscillation, Caribbean SST Index, Pacific/North American Pattern). The results suggest that dry days became less common and light precipitation became more common across the southern Appalachian region. Similarly, the length of dry spells became shorter at most elevations. Teleconnection patterns are linked to the variability of precipitation class frequencies, particularly with dry days and light precipitation. In conclusion, this research reveals the unique character of hydroclimatic variability and change across the southern Appalachian region in the context of the broader southeastern U.S.
Appalachian State Univ, Dept Geog & Planning, Boone, NC 28607 USA
Recommended Citation:
Kinlaw, Timothy,Sugg, Johnathan W.,Perry, L. Baker. Warm Season Hydroclimatic Variability and Change in the Appalachian Region of the Southeastern US from 1950 to 2018[J]. ATMOSPHERE,2019-01-01,10(5)