Microphysical Aspects of Cumulus Clouds
Microphysical Aspects of Cumulus Clouds
批准号:
8715458
负责人:
James Telford
金额:
$55.99万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1987
资助国家:
美国
项目状态:
已结题
起止时间:
1987-12-15 至 1991-05-31
中文摘要
在云的视觉识别中,多云空气和环境中的干燥空气之间发生了积极的混合。最近对层积云夹带的观测提供了证据,表明干空气主要是从云顶而不是从横向边界进入。目前,夹带机制尚未完全了解。携带的体积,与较冷和较干燥的空气从上面,稀释了多云的空气,是负浮力,因此在云内下降。根据现场观察和实验室实验,被夹带的空气团的行为被设想为一个球形漩涡,在团的中间有强烈的上升气流,而在外围有缓慢的上升或下降气流。在这项资助下,Telford教授将研究湍流球形涡旋的动力学,并将其应用于云模型中。由于夹带过程可能在解释积云的有限寿命和预测世界各地观测到的各种云滴大小光谱方面发挥重要作用,因此,如果成功验证,特尔福德教授的新理论将对云建模做出重大贡献。
英文摘要
Within the visual identification of clouds, active mixing takes place between the cloudy air and the drier air of its environment. Recent observations of stratocumulus entrainment provide evidence that dry air mostly enters from the cloud top instead of from the lateral boundaries. At present, the entrainment mechanism is not fully understood. The entrained volume, with the cooler and drier air from above, dilutes the cloudy air, is negatively buoyant, and therefore descends within the cloud. Based on field observations and laboratory experiments, the entrained blob of air is envisioned to behave like a spherical vortex, with strong updraft in the middle of the blob and slower rising or descending air around the periphery. Under this grant, Profesor Telford will examine the dynamics of a turbulent spherical vortex and implement it in a cloud model. Since the entrainment processes may play a significant role in explaining the finite life time of cumulus clouds and in predicting various cloud drop size spectra observed around the world, Professor Telford's new theory, if successfully tested, will be a major contribution to cloud modelling.
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会议论文
Marine Stratus Clouds; Radiative Effects and Models
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批准号:9596249
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项目类别:Continuing Grant
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资助金额:$40.7万
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财政年份:1995
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负责人:James Telford
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依托单位:
Marine Stratus Clouds; Radiative Effects and Models
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批准号:9311752
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项目类别:Continuing Grant
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资助金额:$24.55万
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财政年份:1994
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负责人:James Telford
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依托单位:
Workshop on The Role of Clouds in Global Change
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批准号:9118928
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项目类别:Standard Grant
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资助金额:$7.46万
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财政年份:1992
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负责人:James Telford
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依托单位:
The Physics of Marine Stratus Observations and New Aspects
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批准号:8922239
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项目类别:Continuing Grant
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资助金额:$56.61万
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财政年份:1990
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负责人:James Telford
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依托单位:
Studies of California Marine Stratus
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批准号:8410711
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项目类别:Continuing Grant
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资助金额:$36.8万
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财政年份:1985
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负责人:James Telford
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依托单位:
CCOPE Data and the Study of Entrainment and Ice Formation
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批准号:8513421
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项目类别:Continuing Grant
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资助金额:$24.6万
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财政年份:1985
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负责人:James Telford
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依托单位:
CCOPE Clouds, Entrainment and Ice
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批准号:8206558
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项目类别:Continuing Grant
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资助金额:$34.84万
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财政年份:1982
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负责人:James Telford
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依托单位:
The Cloud Physics and Dynamics of Sea Stratus
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批准号:8012929
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项目类别:Continuing Grant
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资助金额:$59.08万
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财政年份:1981
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负责人:James Telford
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依托单位:
Travel to Attend: Joc Study Conference on Parameterization Of Extended Clouds and Radiation For Climate Models; Oxford,England; September 27 - October 14, 1978
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批准号:7821426
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项目类别:Standard Grant
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资助金额:$0.07万
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财政年份:1978
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负责人:James Telford
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依托单位:
The Formation, Maintenance and Climatic Effects of West Coast Sea Stratus
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批准号:7716321
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项目类别:Continuing Grant
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资助金额:$43.8万
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财政年份:1978
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负责人:James Telford
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依托单位:
Model Development For the Amtex Data (Air-Mass Transformation Experiment)
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批准号:7710646
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项目类别:Standard Grant
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资助金额:$5.04万
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财政年份:1977
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负责人:James Telford
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依托单位:
The Dynamics of Small Cumulii
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批准号:7623361
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项目类别:Continuing Grant
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资助金额:$17.68万
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财政年份:1976
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负责人:James Telford
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依托单位:
Investigation of the Planetary Boundary Layer in Stable and Convective Conditions and Cumulus Clouds
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批准号:7510003
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项目类别:Continuing Grant
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资助金额:$18.2万
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财政年份:1975
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负责人:James Telford
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依托单位:
Collaborative Research in Ncar-Buffalo Aircraft Participation in Joint North Sea Wave Project (Jonswap)
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批准号:7300652
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项目类别:Standard Grant
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资助金额:$7.78万
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财政年份:1973
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负责人:James Telford
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依托单位:
国内基金
海外基金
基于构件软件的面向可靠安全Aspects建模和一体化开发方法研究
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批准号:60503032
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项目类别:青年科学基金项目
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资助金额:23.0万元
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批准年份:2005
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负责人:毛晓光
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依托单位: