DOI: 10.1175/JCLI-D-15-0698.1
Scopus记录号: 2-s2.0-84983535288
论文题名: Global comparisons of regional life cycle properties and motion of multiday convective systems: Tropical and midlatitude land and ocean
作者: Vant-Hull B. ; Rossow W. ; Pearl C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 16 起始页码: 5837
结束页码: 5858
语种: 英语
Scopus关键词: Geostationary satellites
; Tracking (position)
; Cloud-top temperatures
; Convective clouds
; Convective systems
; Expansion and contraction
; Geosynchronous satellites
; Longitudinal motion
; System variables
; Tropical lands
; Tropics
英文摘要: Tracking of convective cloud systems (cloud-top temperature <245 K) in geosynchronous satellite images at 3-h intervals is used to determine life cycle statistics of convective systems in four regimes: tropical land and ocean and midlatitude land and ocean, including seasonal comparisons. The ISCCP tracking dataset covers the period 1984-2006. Only systems with lifetimes greater than or equal to 1 day that were moving predominantly eastward or westward are considered, with splits and merges combined into larger extended convective systems. The life cycle variables are lifetime (duration), maximum area, and minimum cloud-top temperature. These are compared to each other and to the speed of longitudinal motion. Distributions and relationships between the life cycle variables are similar to previous studies based on single-day lifetimes, but the current study is globally extensive (all longitudes at lower and middle latitudes) and multidecadal, which allows extension of such results to rarer, larger, and longer-lived convective systems than previous work. Velocity distributions were monomodal with tails skewed in the direction of the zonal mean wind, being almost purely eastward in the midlatitudes but nearly symmetric in both directions with a small westward bias in the tropics. Representative life cycles for each geographical region are formed by averaging together systems with similar lifetimes. These composite life cycles show that, except for the first and last days, the daily evolution of most system variables exhibits little variation during the average multiday convective life cycle, although the cloud area goes through one cycle of expansion and contraction in a lifetime. © 2016 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50213
Appears in Collections: 气候变化事实与影响
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作者单位: NOAA-Cooperative Remote Sensing and Technology Institute, City College of the City University of New York, New York, NY, United States; Remote Sensing of Climate Group, NOAA-Cooperative Remote Sensing and Technology Center, City College of the City University of New York, New York, NY, United States
Recommended Citation:
Vant-Hull B.,Rossow W.,Pearl C.. Global comparisons of regional life cycle properties and motion of multiday convective systems: Tropical and midlatitude land and ocean[J]. Journal of Climate,2016-01-01,29(16)