DOI: 10.1175/JCLI-D-16-0438.1
Scopus记录号: 2-s2.0-85019123104
论文题名: The record-breaking hot summer in 2015 over Hawaii and its physical causes
作者: Zhu Z. ; Li T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 11 起始页码: 4253
结束页码: 4266
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Commerce
; Surface waters
; Tropics
; Atmosphere-ocean interactions
; Downward solar radiation
; Eastern north pacific
; Inter-decadal variability
; Interannual variability
; Large scale motion
; Sea surface temperature anomalies
; Surface air temperatures
; Oceanography
英文摘要: Hawaiian surface air temperature (HST) during the summer of 2015 (from July to October) was about 1.5°C higher than the climatological mean, which was the hottest since records began in 1948. In the context of record-breaking seasonal-mean high temperature, 98 exceptional local heatwave days occurred during the summer of 2015. Based on diagnoses and simulations, this paper demonstrates that the record-high HST during the summer of 2015 arose mainly from the combined effects of the interannual and interdecadal variability of sea surface temperature anomalies (SSTAs). The interannual variability of SSTAs, with an El Niño-like pattern in the tropics and cold (warm) anomalies over the western (eastern) North Pacific, was the primary contributor to the abnormally high HST in the summer of 2015. This interannual tropical-extratropical SSTA pattern was accompanied by low-level southwesterly anomalies over the central North Pacific, which weakened the climatological northeasterly trade winds and reduced the ventilation effect, warming Hawaii. Numerical experiments further revealed that the SST warming in the subtropical eastern North Pacific was mostly responsible for the weakened trade winds and warming over Hawaii. Interdecadal SST warming in the tropics was a secondary factor. By superimposing the positive SSTAs over the Indo-Pacific warm pool and tropical North Atlantic Ocean upon the climatological-mean maximum SST regions, it was found that these anomalies led to enhanced convection over the Maritime Continent and the oceans around Mexico, causing anomalous subsidence and reduced cloud cover over the tropical central North Pacific. The reduced cloudiness increased the amount of downward solar radiation, thus warming Hawaii. © 2017 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49640
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Ministry of Education/Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing, China; International Pacific Research Center, Department of Atmospheric Sciences, University of Hawai'i at Manoa, Honolulu, HI, United States
Recommended Citation:
Zhu Z.,Li T.. The record-breaking hot summer in 2015 over Hawaii and its physical causes[J]. Journal of Climate,2017-01-01,30(11)