DOI: 10.1002/2016JD025796
论文题名: Impacts of a Pinatubo-size volcanic eruption on ENSO
作者: Predybaylo E. ; Stenchikov G.L. ; Wittenberg A.T. ; Zeng F.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 925
结束页码: 947
语种: 英语
英文关键词: central Pacific El Niño
; eastern Pacific El Niño
; ocean dynamical thermostat
; Pinatubo forcing
; sensitivity
; upwelling
Scopus关键词: air-sea interaction
; climate forcing
; El Nino-Southern Oscillation
; general circulation model
; La Nina
; observational method
; sensitivity analysis
; temperature gradient
; thermosphere
; upwelling
; volcanic eruption
; Pacific Ocean
英文摘要: Observations and model simulations of the climate responses to strong explosive low-latitude volcanic eruptions suggest a significant increase in the likelihood of El Niño during the eruption and posteruption years, though model results have been inconclusive and have varied in magnitude and even sign. In this study, we test how this spread of responses depends on the initial phase of El Niño-Southern Oscillation (ENSO) in the eruption year and on the eruption's seasonal timing. We employ the Geophysical Fluid Dynamics Laboratory CM2.1 global coupled general circulation model to investigate the impact of the Pinatubo 1991 eruption, assuming that in 1991 ENSO would otherwise be in central or eastern Pacific El Niño, La Niña, or neutral phases. We obtain statistically significant El Niño responses in a year after the eruption for all cases except La Niña, which shows no response in the eastern equatorial Pacific. The eruption has a weaker impact on eastern Pacific El Niños than on central Pacific El Niños. We find that the ocean dynamical thermostat and (to a lesser extent) wind changes due to land-ocean temperature gradients are the main feedbacks affecting El Niño development after the eruption. The El Niño responses to eruptions occurring in summer are more pronounced than for winter and spring eruptions. That the climate response depends on eruption season and initial ENSO phase may help to reconcile apparent inconsistencies among previous studies. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62750
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia; NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Recommended Citation:
Predybaylo E.,Stenchikov G.L.,Wittenberg A.T.,et al. Impacts of a Pinatubo-size volcanic eruption on ENSO[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)