DOI: 10.1002/joc.5680
论文题名: Hydrological drought associations with extreme phases of the North Atlantic and Arctic Oscillations over Turkey and northern Iran
作者: Vazifehkhah S. ; Kahya E.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 12 起始页码: 4459
结束页码: 4475
语种: 英语
英文关键词: Arctic Oscillation
; hydrological drought
; Iran
; North Atlantic Oscillation
; Turkey
Scopus关键词: Atmospheric pressure
; Arctic Oscillation
; Hydrological droughts
; Iran
; North Atlantic oscillations
; Turkey
; Drought
; Arctic Oscillation
; climate conditions
; drought
; extreme event
; North Atlantic Oscillation
; Caspian Sea
; Iran
; Turkey
英文摘要: Impacts of the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) on hydroclimatic variables have been previously studied in various viewpoints. This study adds a new perspective by focusing on the influences of winter NAO and AO extreme phases on hydrological drought using a standardized streamflow index (SSFI) over Turkey and northern Iran. Moreover, the physical mechanisms associated with the extreme phases of NAO over different atmospheric conditions were investigated. The results concerning short-term droughts across Turkey revealed that wet conditions dominate particularly in the winter and following spring during the negative NAO and AO extreme phases while the NAO and AO impacts in Iran are only significant during simultaneous winter. Furthermore, the outputs of SSFI for the positive extreme phases of NAO and AO considerably differed in Turkey and Iran so that multiple drought events were detected in Turkey for all timescales as generally opposed to Iran. Western and eastern Turkey suffered from drought in various magnitudes during the positive extreme phases of NAO while fewer droughts were observed in Iran around the Caspian Sea during the negative NAO and AO extreme phases. Results of correlation analysis depicts that negative cycles are controlling wetness (drought) in Turkey (Iran) while there is a weak correlation between positive NAO cycles and SSFIs in the study area. In addition, our study showed that negative NAO and AO extreme phases could affect the hydrological drought stronger but in a shorter period compared with a longer period regarding the positive NAO and AO phases. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116781
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Hydraulics and Water Resources Division, Department of Civil Engineering, Istanbul Technical University, Istanbul, Turkey
Recommended Citation:
Vazifehkhah S.,Kahya E.. Hydrological drought associations with extreme phases of the North Atlantic and Arctic Oscillations over Turkey and northern Iran[J]. International Journal of Climatology,2018-01-01,38(12)