DOI: 10.1002/grl.50573
论文题名: GNSS observations of deep convective time scales in the Amazon
作者: Adams D.K. ; Gutman S.I. ; Holub K.L. ; Pereira D.S.
刊名: Geophysical Research Letters
ISSN: 0094-8967
EISSN: 1944-8698
出版年: 2013
卷: 40, 期: 11 起始页码: 2818
结束页码: 2823
语种: 英语
英文关键词: convection
; GNSS
; GPS
; tropical meteorology
; water vapor
Scopus关键词: Characteristic time
; Convective intensity
; Global climate model
; GNSS
; Meteorological station
; Navigational satellites
; Temporal evolution
; Tropical meteorology
; Global positioning system
; Heat convection
; Meteorology
; Natural convection
; Tropics
; Water vapor
; Time measurement
; atmospheric convection
; global climate
; GNSS
; GPS
; mesoscale meteorology
; spatiotemporal analysis
; timescale
; tropical meteorology
; water vapor
; Amazonas [Brazil]
; Brazil
; Manaus
英文摘要: In the tropics, understanding the shallow-to-deep transition and organization of convection on the mesoscale is made difficult due the paucity of long-term high spatial/temporal resolution data. In this paper, data from the world's first long-term equatorial Global Navigational Satellite System meteorological station in Manaus (Central Amazon) is used to create a new metric, a water vapor convergence time scale, to characterize the temporal evolution of deep convection over a tropical continental region. From 3.5 years of data, 320 convective events were analyzed using a compositing analysis. Results reveal two characteristic time scales of water vapor convergence; an 8 h time scale of weak convergence and 4 h timescale of intense water vapor convergence associated with the shallow-to-deep convection transition. The 4 h shallow-to-deep transition time scale is particularly robust, regardless of convective intensity, seasonality, or nocturnal versus daytime convection. This new result provides a useful metric for both high resolution and global climate models to replicate. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879920537&doi=10.1002%2fgrl.50573&partnerID=40&md5=666428353399174a278979545b7b2a91
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6231
Appears in Collections: 气候减缓与适应
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作者单位: Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Distrito Federal, Del. Coyoacan, 04510 Mexico D.F., Mexico
Recommended Citation:
Adams D.K.,Gutman S.I.,Holub K.L.,et al. GNSS observations of deep convective time scales in the Amazon[J]. Geophysical Research Letters,2013-01-01,40(11).