DOI: 10.1002/jgrd.50511
论文题名: A novel diagnostic technique to investigate cloud-controlling factors
作者: Lacagnina C. ; Selten F.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 5979
结束页码: 5991
语种: 英语
英文关键词: cloud-controlling factors
; low-cloud seasonal cycle
; LTS and EIS
; N and tropopause temperature
; nonlinear correlation
; tropical climate
Scopus关键词: Atmospheric temperature
; Sea level
; cloud-controlling factors
; LTS and EIS
; Non-linear correlations
; Seasonal cycle
; Tropical climates
; Clouds
; annual variation
; cloud radiative forcing
; coastal zone
; environmental factor
; nonlinearity
; seasonal variation
; stratocumulus
; California
; Pacific Ocean
; United States
英文摘要: Cloud properties depend on the local meteorological conditions. This relation is quantified using a simple framework which expands on previous methodologies. This novel diagnostic technique is applied in order to understand and assess the relative contribution of various environmental factors to the observed interannual and seasonal variations in cloud properties. In this analysis framework, sea surface temperature, sea level pressure, and, to a lesser extent, the humidity field are the largest contributors to the interannual cloud anomalies in the equatorial Pacific. In addition, in contrast to previous studies, we find that the interannual variability of the ratio of shortwave to longwave cloud radiative effect (N) is independent of the tropopause temperature. Finally, we quantify the role of different factors which are thought to influence the seasonal cycle of the stratocumulus in the subtropics. Off the California coast, the lower tropospheric stability (LTS) better describes the seasonal low-cloud amount changes than the estimated inversion strength (EIS). When the spatial variation in LTS (or EIS) and low-cloud amount is considered within a season, a different relationship is found that depends on the season. The nonlinear relationships between environmental factors and cloud properties can, to a certain extent, be described within the novel framework proposed. Key Points Novel diagnostic technique to analyse cloud-controlling factors and model bias Ratio of SW to LW CRE (N) is independent of tropopause temperature LTS (or EIS) and low-cloud amount relationships changes according to the season © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63601
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: KNMI, Royal Netherlands Meteorological Institute, De Bilt, Netherlands
Recommended Citation:
Lacagnina C.,Selten F.. A novel diagnostic technique to investigate cloud-controlling factors[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)