DOI: 10.1175/JCLI-D-14-00598.1
Scopus记录号: 2-s2.0-84942913960
论文题名: Mass footprints of the north pacific atmospheric blocking highs
作者: Park T.-W. ; Deng Y. ; Li W. ; Yang S. ; Cai M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 12 起始页码: 4941
结束页码: 4949
语种: 英语
Scopus关键词: Climate models
; Climatology
; Atmospheric blocking
; Atmospheric disturbance
; Blocking
; Detection and attributions
; High frequency HF
; Lower troposphere
; Mass fluxes/transport
; North Pacific Ocean
; Life cycle
; atmospheric blocking
; atmospheric dynamics
; eddy
; troposphere
; wind field
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The mass footprints associated with atmospheric blocks over the North Pacific are evaluated by constructing daily tendencies of total mass over the blocking domain from three-dimensional mass fluxes throughout the life cycle of a composite blocking event. The results highlight the major role of mass convergence driven by low-frequency (with periods >1 week) atmospheric disturbances during both the development and decay stage of a block. Specifically, low-frequency eddies are responsible for the accelerated mass buildup 4 days prior to the peak intensity of a block, and they also account for the rapid mass loss afterward. High-frequency, subweekly scale disturbances have statistically significant positive contributions to the mass loss during the decay stage, and also show weak negative contributions to the development of the blocking high prior to the peak of the high. The majority of the mass convergence (divergence) responsible for the intensification (decay) of the blocking high occurs in the middle-to-lower troposphere and is largely attributed to mass flux driven by low-frequency meridional (zonal) winds. Also discussed are the implications of this new mass perspective of atmospheric blocks for understanding dynamics of blocking highs and for model bias detection and attribution. © 2015 American Meteorological Society. 资助项目: 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/50483
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Department of Earth Science Education, Chonnam National University, Gwangju, South Korea; Earth and Ocean Sciences, Nicholas School, Duke University, Durham, NC, United States; School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States
Recommended Citation:
Park T.-W.,Deng Y.,Li W.,et al. Mass footprints of the north pacific atmospheric blocking highs[J]. Journal of Climate,2015-01-01,28(12)