DOI: 10.1002/2016JD025191
论文题名: Comparing simulated PSC optical properties with CALIPSO observations during the 2010 Antarctic winter
作者: Zhu Y. ; Toon O.B. ; Pitts M.C. ; Lambert A. ; Bardeen C. ; Kinnison D.E.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 1175
结束页码: 1202
语种: 英语
英文关键词: CALIPSO PSC detection and classification
; NAT formation mechanisms
; Three-dimensional modeling of polar stratospheric clouds
Scopus关键词: algorithm
; CALIPSO
; classification
; cloud microphysics
; comparative study
; detection method
; microwave limb sounder
; nitric acid
; nucleation
; observational method
; optical property
; polar stratospheric cloud
; satellite data
; simulation
; three-dimensional modeling
; winter
; Antarctica
; Arctic
英文摘要: We simulate polar stratospheric clouds (PSCs) during the Antarctic winter of 2010 using the Specified Dynamics version of the Whole Atmosphere Community Climate Model/Community Aerosol and Radiation Model for Atmospheres (SD-WACCM/CARMA) model. The current PSC model contains microphysical schemes for supercooled ternary solutions (STS) and nitric acid trihydrate (NAT) particles, as well as a prognostic treatment for PSC ice particles and dehydration. Our simulations and CALIPSO satellite data suggest two major NAT particle formation mechanisms. The first mechanism is the nucleation of NAT from STS. Our model, with homogeneous nucleation rates of NAT from STS constrained by observations from the Arctic winter of 2010–2011, reproduces optical properties observed by CALIPSO over Antarctica in May and the timing of denitrification observed by the Microwave Limb Sounder within their uncertainties. On the other hand, the CALIPSO data indicate that our simulations are missing clouds containing small NAT particles with large number densities. We suggest these particles are most likely to form from ice clouds or STS in gravity waves, as found by previous investigations. The simulated cloud coverage agrees with the CALIPSO cloud coverage within a few percent on average with a correlation coefficient of 0.83. However, using the CALIPSO classification algorithm, simulated ice clouds often fall into Mix categories under the denitrified and dehydrated conditions. The model needs an improved ice microphysical representation, not only to allow ice particles to be a source of NAT but also to provide information on ice cloud particle number and size so that ice cloud optical properties can be more precisely calculated for comparison with CALIPSO data. ©2017. American Geophysical Union. All Rights Reserved. 资助项目: NNX09AK71G
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62744
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: Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; Langley Research Center, Hampton, VA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Zhu Y.,Toon O.B.,Pitts M.C.,et al. Comparing simulated PSC optical properties with CALIPSO observations during the 2010 Antarctic winter[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)