| DOI: | 10.1175/JCLI-D-12-00385.1
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| Scopus记录号: | 2-s2.0-84883202090
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| 论文题名: | A planetary boundary layer height climatology derived from ECMWF reanalysis data |
| 作者: | Von Engeln A.; Teixeira J.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2013
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| 卷: | 26, 期:17 | | 起始页码: | 6575
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| 结束页码: | 6590
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| 语种: | 英语
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| Scopus关键词: | Convective boundary layers
; Planetary boundary layers
; Potential temperature
; Seasonal and diurnal variations
; Standard deviation
; Temperature and humidities
; Vertical gradients
; Virtual temperature
; Atmospheric thermodynamics
; Climatology
; air temperature
; atmospheric pressure
; boundary layer
; climatology
; relative humidity
; weather forecasting
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| 英文摘要: | A planetary boundary layer (PBL) height climatology from ECMWF reanalysis data is generated and analyzed. Different methods are first compared to derive PBL heights from atmospheric temperature, pressure, and relative humidity (RH), which mostly make use of profile gradients, for example, in RH, refractivity, and virtual or potential temperature. Three methods based on the vertical gradient of RH, virtual temperature, and potential temperature were selected for the climatology generation. The RH-based method appears to capture the inversion that caps the convective boundary layer very well as a result of its temperature and humidity dependence, while the temperature-based methods appear to capture the PBL better at high latitudes. A validation of the reanalysis fields with collocated radiosonde data shows generally good agreement in terms of mean PBL height and standard deviation for the RH-based method. The generated ECMWF-based PBL height climatology shows many of the expected climatological features, such as a fairly low PBL height near the west coast of continents where stratus clouds are found and PBL growth as the air is advected over warmer waters toward the tropics along the trade winds. Large seasonal and diurnal variations are primarily found over land. The PBL height can exceed 3 km, mostly over desert areas during the day, although large values can also be found in areas such as the ITCZ. The robustness of the statistics was analyzed by using information on the percentage of outliers. Here in particular, the sea-based PBL was found to be very stable. © 2013 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/51708
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Eumetsat, Darmstadt, Germany; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
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| Recommended Citation: | |
Von Engeln A.,Teixeira J.. A planetary boundary layer height climatology derived from ECMWF reanalysis data[J]. Journal of Climate,2013-01-01,26(17)
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