DOI: 10.1175/JCLI-D-14-00719.1
Scopus记录号: 2-s2.0-84945903076
论文题名: The low-level jet over the southern great plains determined from observations and reanalyses and its impact on moisture transport
作者: Berg L.K. ; Riihimaki L.D. ; Qian Y. ; Yan H. ; Huang M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 17 起始页码: 6682
结束页码: 6706
语种: 英语
Scopus关键词: Application programs
; Atmospheric radiation
; Budget control
; Jets
; Water vapor
; Wind
; Atmospheric radiation measurement programs
; Moisture/moisture budgets
; North America
; Reanalysis
; Research and application
; Retrospective analysis
; Southern great plains
; U.S. Department of Energy
; Moisture
; atmospheric moisture
; atmospheric transport
; convergence
; jet flow
; mesoscale meteorology
; water vapor
; weather forecasting
; Great Plains
英文摘要: This study utilizes six commonly used reanalysis products, including the NCEP-Department of Energy Reanalysis 2 (NCEP2), NCEP Climate Forecast System Reanalysis (CFSR), ECMWF interim reanalysis (ERA-Interim), Japanese 25-year Reanalysis Project (JRA-25), Modern-Era Retrospective Analysis for Research and Applications (MERRA), and North American Regional Reanalysis (NARR), to evaluate features of the southern Great Plains low-level jet (LLJ) above the U.S. Department of Energy's Atmospheric Radiation Measurement Program (ARM) Climate Research Facility (ACRF) Southern Great Plains site. Two sets of radiosonde data are utilized: the six-week Midlatitude Continental Convective Clouds Experiment (MC3E) and a 10-yr period spanning 2001 through 2010. All six reanalyses are compared to MC3E data, while only the NARR, MERRA, and CFSR are compared to the 10-yr data. The reanalyses are able to represent most aspects of the composite LLJ profile, although there is a tendency for each reanalysis to overestimate the wind speed between the nose of the LLJ (at approximately 900 mb) and a pressure level of 700 mb. There are large discrepancies in the number of LLJs observed and derived from the reanalysis, particularly for strong LLJs, leading to an underestimate of the moisture transport associated with LLJs. When the 10-yr period is considered, the NARR and CFSR overestimate and MERRA underestimates the total moisture transport, but all three underestimate the transport associated with strong LLJs by factors of 1.4, 2.0, and 2.7 for CFSR, NARR, and MERRA, respectively. During MC3E there were differences in the patterns of moisture convergence and divergence, but the patterns are more consistent during the 10-yr period. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50459
Appears in Collections: 气候变化事实与影响
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作者单位: Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Berg L.K.,Riihimaki L.D.,Qian Y.,et al. The low-level jet over the southern great plains determined from observations and reanalyses and its impact on moisture transport[J]. Journal of Climate,2015-01-01,28(17)