DOI: 10.1002/2014GL062279
论文题名: Vertical velocities and turbulence in midlatitude anvil cirrus: A comparison between in situ aircraft measurements and ground-based Doppler cloud radar retrievals
作者: Muhlbauer A. ; Kalesse H. ; Kollias P.
刊名: Geophysical Research Letters
ISSN: 0094-9611
EISSN: 1944-9342
出版年: 2014
卷: 41, 期: 22 起始页码: 7814
结束页码: 7821
语种: 英语
英文关键词: cirrus
; vertical velocities
Scopus关键词: Aircraft
; Atmospheric radiation
; Clouds
; Doppler radar
; Kinetic energy
; Kinetics
; Radar
; Turbulence
; Velocity
; Atmospheric radiation measurements
; cirrus
; Dissipation rate of turbulent kinetic energy
; Environmental conditions
; Simultaneous observation
; Statistical comparisons
; U.S. Department of Energy
; Vertical velocity
; Radar measurement
; aircraft
; cirrus
; environmental conditions
; kinetic energy
; latitude
; measurement method
; radar
; radiation balance
; spatial analysis
; turbulence
; velocity
英文摘要: This study introduces a statistical comparison of vertical velocity observations within cirrus from aircraft and ground-based Doppler cloud radar. Two cases of midlatitude anvil cirrus forming under very similar environmental conditions are examined. The case studies benefit from simultaneous observations of vertical velocities in cirrus collected at and around the Atmospheric Radiation Measurement Southern Great Plains site during the U.S. Department of Energy Small Particles in Cirrus field campaign. Observations from both platforms suggest that the majority of vertical velocities in the examined midlatitude anvil cirrus cases are roughly within ±1 m s-1 although higher vertical velocities are occasionally observed. The quality of the vertical velocity comparison between in situ aircraft measurements and ground-based Doppler radar retrievals depends on the case. For the first case on 23 April 2010, the comparison suggests that the radar retrieval may underestimate vertical velocities in the range between roughly 50 cm s-1 and 1 m s-1. For the second case on 14 June 2010, the agreement between radar and aircraft is excellent, and the differences are largely within the observed variability of vertical velocities within cirrus. Differences in the spatial scales of vertical velocities and turbulence sampled by the aircraft and Doppler radar, which arise due to differences in the temporal resolution of the observational platforms are not found to explain the observed discrepancies. Estimates for the dissipation rate of turbulent kinetic energy agree to within 1 order of magnitude between the two observational platforms. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923329824&doi=10.1002%2f2014GL062279&partnerID=40&md5=73addd7e8b9b8e06c5a4c235a585d462
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6875
Appears in Collections: 气候减缓与适应
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作者单位: Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States
Recommended Citation:
Muhlbauer A.,Kalesse H.,Kollias P.. Vertical velocities and turbulence in midlatitude anvil cirrus: A comparison between in situ aircraft measurements and ground-based Doppler cloud radar retrievals[J]. Geophysical Research Letters,2014-01-01,41(22).