DOI: 10.1175/JCLI-D-17-0395.1
Scopus记录号: 2-s2.0-85041644178
论文题名: A global view of coastal low-level wind jets using an ensemble of reanalyses
作者: Lima D.C.A. ; Soares P.M.M. ; Semedo A. ; Cardoso R.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 4 起始页码: 1525
结束页码: 1546
语种: 英语
英文关键词: Climatology
; Interannual variability
; Seasonal variability
Scopus关键词: Climate change
; Climatology
; Fighter aircraft
; Muscle
; European centre for medium-range weather forecasts
; Interannual variability
; Research and application
; Retrospective analysis
; Seasonal variability
; Temporal information
; Temporal variability
; Three-dimensional data
; Weather forecasting
; annual variation
; climatology
; data assimilation
; ensemble forecasting
; jet stream
; parameterization
; seasonal variation
; weather forecasting
; Angola
; Benguela
; Oman
英文摘要: Global reanalyses are powerful tools to study the recent climate. They are built by combining forecast models with observations through data assimilation, which provide complete spatial and temporal information of observable and unobservable parameters. The reanalyses constitute very valuable three-dimensional data of the atmosphere, which make it possible to investigate a panoply of atmospheric processes, such as coastal low-level jets (CLLJs). In the present study, three global reanalyses, the European Centre for Medium-Range Weather Forecasts (ECMWF) interim reanalysis (ERA-Interim), the Japanese 55-year Reanalysis (JRA-55), and the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), are used to build an ensemble of reanalyses for a period encompassing 1980-2016 with 6-hourly output. A detailed global climatology of CLLJs is presented based on this ensemble of reanalyses. This reanalysis ensemble makes it possible to explore the ability of reanalysis to represent the CLLJs mitigating its uncertainty and adding robustness. The annual and diurnal cycle as well as the interannual variability are analyzed in order to evaluate the temporal variability of frequency of occurrence of CLLJ. The ensemble mean displays a good representation of the seasonal spatial variability of frequency of occurrence of coastal jets. The Oman and Benguela CLLJs show, respectively, a decrease and increase of frequency of occurrence in the studied period, which are statistically significant during boreal summer and austral spring. The coastal jets have higher mean frequencies of occurrences during late afternoon and early evening. During the season where each CLLJ has higher mean frequency of occurrence, the Oman CLLJ is the most intense and occurs at higher altitudes. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111683
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Instituto Dom Luiz, Faculty of Sciences, University of Lisbon, Lisbon, Portugal; Department of Water Science and Engineering, International Institute for Hydraulic and Environmental Engineering, Delft Institute for Water Education, Delft, Netherlands
Recommended Citation:
Lima D.C.A.,Soares P.M.M.,Semedo A.,et al. A global view of coastal low-level wind jets using an ensemble of reanalyses[J]. Journal of Climate,2018-01-01,31(4)