Warm Season Hydroclimatic Variability and Change in the Appalachian Region of the Southeastern U.S. from 1950 to 2018
| Autor: | L. Baker Perry, Johnathan W. Sugg, Timothy Kinlaw |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences 0208 environmental biotechnology Population precipitation variability Climate change Context (language use) 02 engineering and technology lcsh:QC851-999 Environmental Science (miscellaneous) Warm season 01 natural sciences hydroclimate Appalachian Region Atlantic multidecadal oscillation Precipitation education 0105 earth and related environmental sciences education.field_of_study southeastern United States southern Appalachian Mountains 020801 environmental engineering climate change Geography lcsh:Meteorology. Climatology Physical geography Teleconnection |
| Zdroj: | Atmosphere, Vol 10, Iss 5, p 289 (2019) Atmosphere Volume 10 Issue 5 |
| ISSN: | 2073-4433 |
| Popis: | 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&rsquo 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. |
| Databáze: | OpenAIRE |
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