DOI: 10.1002/joc.5257
论文题名: Impact of different types of ENSO conditions on seasonal precipitation and streamflow in the southeastern United States
作者: Wang H. ; Asefa T.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 3 起始页码: 1438
结束页码: 1451
语种: 英语
英文关键词: Central Pacific El Niño
; Eastern Pacific El Niño
; ENSO events
; Precipitation
; Southeastern United States
; Streamflow
Scopus关键词: Atmospheric pressure
; Precipitation (chemical)
; Stream flow
; Water resources
; Eastern pacific
; ENSO events
; Hydrological response
; Seasonal precipitations
; Similar analysis
; Southeastern United States
; Southern oscillation
; Water resources management
; Climatology
; atmosphere-ocean coupling
; El Nino-Southern Oscillation
; hydrological response
; La Nina
; precipitation (climatology)
; seasonal variation
; streamflow
; teleconnection
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (East)
; United States
英文摘要: Recent advancement in climate sciences has discovered two different types of ElNiño events, namely the eastern Pacific El Niño (EP-El Niño) and central Pacific El Niño (CP-El Niño). Identifying how watershed responses to different El Niño-Southern Oscillation (ENSO) events, including both El Niño and La Niña conditions, is critical in understanding how the oceanic teleconnections possibly affect local precipitation and streamflow. In this study, 70 watersheds with minimum human impact during the period 1950-2010 in the Southeastern United States (SEUS) were selected to examine whether streamflow exhibits different patterns in EP-and CP-El Niño conditions, and La Niña events. Similar analyses were applied to 187 precipitation stations in SEUS. Analyses reveal that for the peak season of both EP-El Niño and CP-El Niño years, December-January-February (DJF), seasonal average streamflow and precipitation is higher than long-term average. CP-El Niño, however, weakens the wetting effect brought by traditional EP-El Niño, leading to smaller percentage of increases in seasonal precipitation/streamflow for most stations in the SEUS. In the decaying season March-April-May (MAM) of ENSO signals, streamflow for both EP- and CP-El Niño is higher than its corresponding climatology. The increased amplitude is even greater in MAM compared to that of the DJF season. During La Niña events, reduced precipitation and streamflow are observed for large portion of stations in SEUS, especially for the DJF and MAM season. The use of ENSO in water resources management is often limited to boreal winter season for the SEUS, as its signal is well reflected in hydrological responses. This study finds that for the June-July-August (JJA) season followed by the decay of ENSO signals in MAM, there is striking difference in the magnitude of precipitation and streamflow for EP-El Niño and CP-El Niño events. © 2017 Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117127
Appears in Collections: 气候减缓与适应
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作者单位: Tampa Bay WaterFL, United States
Recommended Citation:
Wang H.,Asefa T.. Impact of different types of ENSO conditions on seasonal precipitation and streamflow in the southeastern United States[J]. International Journal of Climatology,2018-01-01,38(3)