DOI: 10.1002/2013JD020345
论文题名: Subtropical-polar jet interactions in Southern Plains dust storms
作者: Kaplan M.L. ; Vellore R.K. ; Lewis J.M. ; Underwood S.J. ; Pauley P.M. ; Martin J.E. ; Rabin R.M. ; Krishnan R.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 23 起始页码: 12893
结束页码: 12914
语种: 英语
英文关键词: adjustment
; ageostrophy
; circulation
; isallobaric
; jet
Scopus关键词: Boiler circulation
; Computer simulation
; Geometry
; Jets
; Mergers and acquisitions
; Merging
; Tropics
; Weather forecasting
; Weather satellites
; adjustment
; ageostrophy
; Differing geometry
; isallobaric
; Mesoscale circulation
; Scale interactions
; Surface observation
; Weather research and forecasting models
; Storms
; ageostrophic flow
; data assimilation
; data set
; dust storm
; jet stream
; mesoscale meteorology
; mesoscale motion
; satellite imagery
; troposphere
; weather forecasting
; North America
英文摘要: The origin of two separate Southern High Plains dust storms, which occurred over a 2 day period in February 2007, is traced to an interaction between the subtropical jet (STJ) and the polar jet (PJ). A large-scale thermal wind imbalance resulting from the confluence of these two jets led to a series of mesoscale circulations that ultimately produced the dust storms. Understanding the connectivity between the dust storms with differing geometries is central to the present investigation. The study rests on the interpretation of analyses from upper air and surface observations complemented by imagery from satellites, the 32 km gridded data set from the North American Regional Reanalysis, and a fine-resolution (6 km grid) simulation from the Weather Research and Forecasting model. Principal assertions from the present study are (1) scale interaction is fundamental to the creation of an environment conducive to dust storm development, (2) low to middle tropospheric mass adjustment is the primary response to a large-scale imbalance, (3) the mesoscale mass adjustment is associated with circulations about a highly accelerative jet streak resulting from the merger of the PJ and STJ, (4) the structure of the jet streak resulting from this merger governs the evolution of the geometry of the dust plumes, with plumes that initially had a straight-line orientation developing a semicircular geometry, and (5) it is concluded that improvements in dust storm prediction will depend on an augmentation to the upper air network in concert with a flow-dependent data assimilation strategy. Key Points Understanding the connectivity between the dust storms Merger of polar and subtropical jet streams Mesoscale response to large-scale imbalance ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63113
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: Division of Atmospheric Science, Desert Research Institute, 2215 Raggio Pkwy., Reno, NV 89512, United States; Center for Climate Change Research, Indian Institute of Tropical Meteorology, Pune, India; National Severe Storms Laboratory, Norman OK, United States; Department of Geology and Geography, Georgia Southern College, Statesboro GA, United States; Marine Meteorology Division, Naval Research Laboratory, Monterey CA, United States; Department of Atmospheric and Oceanic Science, University of Wisconsin-Madison, Madison WI, United States; Space Science and Engineering Center, Madison WI, United States
Recommended Citation:
Kaplan M.L.,Vellore R.K.,Lewis J.M.,et al. Subtropical-polar jet interactions in Southern Plains dust storms[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(23)