DOI: 10.1175/JCLI-D-16-0505.1
Scopus记录号: 2-s2.0-85028509187
论文题名: Influences of boreal summer intraseasonal oscillation on heat waves in monsoon asia
作者: Hsu P.-C. ; Lee J.-Y. ; Ha K.-J. ; Tsou C.-H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 18 起始页码: 7191
结束页码: 7211
语种: 英语
Scopus关键词: Advection
; Climate change
; Climatology
; Heat flux
; Heating
; Mechanical waves
; Tropical engineering
; Extreme events
; Intraseasonal variability
; Monsoons
; Rossby wave
; Teleconnections
; Atmospheric thermodynamics
英文摘要: By analyzing observation-based high-resolution surface air temperature (SAT) data over the Asian monsoon region (here called "monsoon Asia") for 1981-2007, the modulation by boreal summer intraseasonal oscillation (BSISO) of heat wave (HW) occurrence is examined. Strong SAT variability and a high probability of HW occurrence on intraseasonal time scales are found consistently in the densely populated regions over central India (CI), the YangtzeRiver valley in China (YR), Japan (JP), and theKorean Peninsula (KP). The two distinct BSISO modes (30-60-day BSISO1 and 10-30-day BSISO2) show different contributions to HW occurrence in monsoon Asia. A significant increase inHWoccurrence over CI (YR) is observed during phases 2-3 (8-1) of BSISO2 when the 10-30-day anticyclonic and descending anomaly induce enhanced upward thermal heating and sensible heat flux (warm advection) around the areas. On the other hand, the northeastward propagating BSISO1 is closely connected to the increased HW probability over JP and KP. During phases 7-8 of BSISO1, the 30-60-day subsidence along with the low-level anticyclonic anomaly moves into northeastern Asia, leading to enhanced diabatic (adiabatic) warming near surface in JP (KP). Analysis of a three-dimensional streamfunction tendency equation indicates that diabatic cooling induced by the BSISO-related suppressed convections is the main forcing term of anticyclonic anomaly although it is largely offset by the decreased static stability associated with adiabatic warming. The BSISO-related vorticity advection leads to an anticyclonic (cyclonic) tendency to the northwestern (southeastern) part of the center of anticyclonic anomaly, favoring northwestward development of the BSISO anomalous circulations and thus providing a favorable condition forHWoccurrence over the western Pacific-EastAsia sector. © 2017 American Meteorological Society. 资助项目: NRF, National Research Foundation
; NSFC, National Natural Science Foundation of China
; Natural Science Foundation of Jiangsu Province
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48721
Appears in Collections: 气候减缓与适应 气候变化与战略
There are no files associated with this item.
作者单位: Key Lab of Meteorological Disaster of Ministry of Education, Nanjing Univ of Information Sci., Tech., Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing, China; Research Center for Climate Sciences and IBS Center for Climate Physics, Pusan National University, Busan, South Korea; Department of Atmospheric Sciences and Research Center for Climate Sciences, Pusan National University, Busan, South Korea; Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan
Recommended Citation:
Hsu P.-C.,Lee J.-Y.,Ha K.-J.,et al. Influences of boreal summer intraseasonal oscillation on heat waves in monsoon asia[J]. Journal of Climate,2017-01-01,30(18)