DOI: 10.1002/jgrd.50128
论文题名: Two years of atmospheric boundary layer observations on a 45-m tower at Dome C on the Antarctic plateau
作者: Genthon C. ; Six D. ; Gallée H. ; Grigioni P. ; Pellegrini A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 8 起始页码: 3218
结束页码: 3232
语种: 英语
英文关键词: Antarctica
; Boundary layer processes
; Mesoscale meteorology
; Polar meteorology
Scopus关键词: Atmospheric boundary layer
; Domes
; Meteorology
; Supersaturation
; Towers
; Antarctica
; Boundary layer process
; Coldest temperatures
; Lower atmospheric boundary layers
; Mesoscale meteorology
; Meteorological analysis
; Moisture Measurement
; Synoptic variability
; Atmospheric temperature
; air mass
; artifact
; boundary layer
; Intergovernmental Panel on Climate Change
; mesoscale meteorology
; polar meteorology
; supersaturation
; water column
; Antarctica
; Dome Concordia
; East Antarctica
英文摘要: The lower atmospheric boundary layer at Dome C on the Antarctic plateau has been continuously monitored along a 45-m tower since 2009. Two years of observations (2009 and 2010) are presented. A strong diurnal cycle is observed near the surface in summer but almost disappears at the top of the tower, indicating that the summer nocturnal inversion is very shallow. Very steep inversions reaching almost 1 °C m-1 on average along the tower are observed in winter. They are stronger and more frequent during the colder 2010 winter, reaching a maximum in a layer ~10-15 m above the surface. Winter temperature is characterized by strong synoptic variability. An extreme warm event occurred in July 2009. The temperature reached -30 °C, typical of midsummer weather. Meteorological analyses which agree with the observations near the surface confirm that heat is propagated downward from higher elevations. A high total water column indicates moist air masses aloft originating from the lower latitudes. The coldest temperatures and strongest inversions are associated with characteristic synoptic patterns and a particularly dry atmosphere. Measurement of moisture in the clean and cold Antarctic plateau atmosphere is a challenging task. Supersaturations are very likely but are not revealed by the observations. This is possibly an instrumental artifact that would affect other moisture measurements made in similar conditions. In spite of this, such observations offer a stringent test of the robustness of the polar boundary layer in meteorological and climate models, addressing a major concern raised in the IPCC 2007 report. Key-points Two years of continuous 45-m ABL observation at Dome C Antarctica Observed high interannual and synoptic variability and extreme inversions Supersaturation likely but not reported, common instrumental limitation ©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/63816
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: UJF, Grenoble 1, CNRS Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), UMR 5183, Grenoble, F-38402, France; ENEA, Rome, Italy; CNR, Dipartimento Scienze Del Sistema Terra e Tecnologie per l'Ambiente (DSSTTA), Italy
Recommended Citation:
Genthon C.,Six D.,Gallée H.,et al. Two years of atmospheric boundary layer observations on a 45-m tower at Dome C on the Antarctic plateau[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(8)