| DOI: | 10.1002/2016GL069426
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| 论文题名: | High-frequency gravity waves and homogeneous ice nucleation in tropical tropopause layer cirrus |
| 作者: | Jensen E.J.; Ueyama R.; Pfister L.; Bui T.V.; Alexander M.J.; Podglajen A.; Hertzog A.; Woods S.; Lawson R.P.; Kim J.-E.; Schoeberl M.R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9602
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| EISSN: | 1944-9333
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| 出版年: | 2016
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| 卷: | 43, 期:12 | | 起始页码: | 6629
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| 结束页码: | 6635
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| 语种: | 英语
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| 英文关键词: | cirrus
; nucleation
; waves
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| Scopus关键词: | Clouds
; Gravity waves
; Nucleation
; Tropical engineering
; Tropics
; Waves
; Balloon measurements
; Cirrus
; Heterogeneous nucleation
; High frequency gravity waves
; High frequency waves
; One-dimensional simulations
; Temperature variability
; Tropical tropopause layers
; Ice
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| 英文摘要: | The impact of high-frequency gravity waves on homogeneous-freezing ice nucleation in cold cirrus clouds is examined using parcel model simulations driven by superpressure balloon measurements of temperature variability experienced by air parcels in the tropical tropopause region. We find that the primary influence of high-frequency waves is to generate rapid cooling events that drive production of numerous ice crystals. Quenching of ice nucleation events by temperature tendency reversal in the highest-frequency waves does occasionally produce low ice concentrations, but the overall impact of high-frequency waves is to increase the occurrence of high ice concentrations. The simulated ice concentrations are considerably higher than indicated by in situ measurements of cirrus in the tropical tropopause region. One-dimensional simulations suggest that although sedimentation reduces mean ice concentrations, a discrepancy of about a factor of 3 with observed ice concentrations remains. Reconciliation of numerical simulations with the observed ice concentrations will require inclusion of physical processes such as heterogeneous nucleation and entrainment. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977080661&doi=10.1002%2f2016GL069426&partnerID=40&md5=751495c9ba9486cc53a72919c8618d1d
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| Citation statistics: |
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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/10565
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | NASA Ames Research Center, Moffett Field, CA, United States
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| Recommended Citation: | |
Jensen E.J.,Ueyama R.,Pfister L.,et al. High-frequency gravity waves and homogeneous ice nucleation in tropical tropopause layer cirrus[J]. Geophysical Research Letters,2016-01-01,43(12).
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