DOI: 10.1175/JCLI-D-17-0440.1
Scopus记录号: 2-s2.0-85047072106
论文题名: ENSO transition from La Niña to El Niño drives prolonged spring-summer drought over North China
作者: Zhang L. ; Wu P. ; Zhou T. ; Xiao C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 9 起始页码: 3509
结束页码: 3523
语种: 英语
英文关键词: Air-sea interaction
; Climate variability
; ENSO
; Interannual variability
Scopus关键词: Climate change
; Drought
; Lanthanum
; Oceanography
; Surface waters
; Troposphere
; Air sea interactions
; Climate variability
; ENSO
; Indian monsoon rainfall
; Interannual variability
; Meteorological disasters
; Sea surface temperature anomalies
; Tropospheric temperature
; Fighter aircraft
; air-sea interaction
; annual variation
; climate modeling
; drought
; El Nino
; El Nino-Southern Oscillation
; La Nina
; seasonality
; China
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Persistent drought is a major meteorological disaster causing vast agricultural damage and long-term regional water crises. Over north China, this type of drought tends to begin in spring and to persist until summer with severe societal impacts. This paper aims to identify the large-scale dynamic drivers of the prolonged spring-summer drought (PSSD) over north China. This analysis has shown that the north China PSSD is associated with a persistent anomalous low-level cyclonic circulation spanning the midlatitude North Pacific from spring to summer with reduced moisture transport to north China, in combination with a tropospheric cooling along the East Asian upper-level westerly jet with dynamically forced anomalous descent above. Seven of the selected eight north China PSSD events occurred when La Niña transitioned to El Niño with a negative North Pacific Oscillation (NPO) phase in the preceding winter. The two key circulation anomalies in spring are set directly by a negative NPO phase generated in the preceding winter. The NPO, in turn, forces an El Niño onset in summer through the so-called seasonal footprinting mechanism. Consequently, sea surface temperature anomalies of El Niño in summer suppress Indian monsoon rainfall, triggering the tropospheric temperature cooling over East Asia through a circumglobal teleconnection along the East Asian upper-level westerly jet. Modeling analysis of the long preindustrial control simulation confirms the above findings. This study demonstrates that ENSO phase transition from La Niña to El Niño is one of the important precursors of north China PSSD. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111557
Appears in Collections: 气候减缓与适应
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作者单位: LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Met Office Hadley Centre, Exeter, United Kingdom; University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China; National Climate Center, China Meteorological Administration, Beijing, China
Recommended Citation:
Zhang L.,Wu P.,Zhou T.,et al. ENSO transition from La Niña to El Niño drives prolonged spring-summer drought over North China[J]. Journal of Climate,2018-01-01,31(9)