DOI: 10.1175/JCLI-D-15-0460.1
Scopus记录号: 2-s2.0-84987973342
论文题名: The time scales of variability of marine low clouds
作者: de Szoeke S.P. ; Verlinden K.L. ; Yuter S.E. ; Mechem D.B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 18 起始页码: 6463
结束页码: 6481
语种: 英语
Scopus关键词: Atmospheric boundary layer
; Atmospheric movements
; Atmospheric temperature
; Atmospheric thermodynamics
; Boundary layers
; Clouds
; Convergence of numerical methods
; Submarine geophysics
; Surface properties
; Surface waters
; Time measurement
; Time series
; Atmosphere-ocean interactions
; Cloud cover
; Inversion strength
; Positive correlations
; Sea surface temperature (SST)
; Statistical techniques
; Stratocumulus clouds
; Vertical velocity
; Oceanography
英文摘要: Multidecade global regressions of inversion strength, vertical velocity, and sea surface temperature (SST) on low cloud amount, from subdaily to multiyear time scales, refute the dominance of seasonal inversion strength on marine low cloud variability. Multiday low cloud variance averaged over the eastern Pacific and Atlantic stratocumulus regions [5 × 10-2 (cloud amount)2] is twice the subdaily variance and 5 times larger than the multimonth variance. The broad multiday band contains most (60%) of the variance, despite strong seasonal (annual) and diurnal spectral peaks. Multiday low cloud amount over the eastern tropical and midlatitude oceans is positively correlated to inversion strength, with a slope of 2%-5% K-1. Anecdotes show multiday low cloud and inversion strength anomalies propagate equatorward from midlatitudes. Previously shown correlations of low clouds to strong inversions and cool SST on monthly and longer time scales in the stratocumulus regions imply positive cloud-radiative feedbacks, with e-folding time scales of 300 days for SST and 14 days for atmospheric boundary layer temperature. On multimonth time scales, removing the effect of SST on low clouds reduces the low cloud amount explained by inversion strength by a factor of 3, but SST has a small effect at other time scales. Contrary to their positive correlation in the stratocumulus cloud decks, low clouds are anticorrelated to inversion strength over most of the tropics on daily and subdaily time scales. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50166
Appears in Collections: 气候变化事实与影响
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作者单位: Oregon State University, Corvallis, OR, United States; North Carolina State University, Raleigh, NC, United States; University of Kansas, Lawrence, KS, United States
Recommended Citation:
de Szoeke S.P.,Verlinden K.L.,Yuter S.E.,et al. The time scales of variability of marine low clouds[J]. Journal of Climate,2016-01-01,29(18)