搜索结果: 1-15 共查到“理学 Cirrus clouds”相关记录18条 . 查询时间(0.479 秒)
A Simple Framework for the Dynamic Response of Cirrus Clouds to Local Diabatic Radiative Heating
Simple Framework the Dynamic Response Cirrus Clouds Local Diabatic Radiative Heating
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2012/2/28
This paper presents a simple analytical framework for the dynamic response of cirrus to a local radiative flux convergence, expressible in terms of three independent modes of cloud evolution. Horizont...
Aerosol effects on ice clouds: can the traditional concept of aerosol indirect effects be applied to aerosol-cloud interactions in cirrus clouds?
Aerosol effects ice clouds aerosol indirect effects aerosol-cloud interactions cirrus clouds
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2010/11/29
Cirrus clouds cover approximately 20–25% of the globe and thus play an important role in the Earth's radiation budget. Therefore the effect of aerosols on cirrus clouds can have a substantial impact o...
Cirrus clouds in a global climate model with a statistical cirrus cloud scheme
Cirrus clouds a global climate model a statistical cirrus cloud scheme
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2010/8/13
A statistical cirrus cloud scheme that accounts for mesoscale temperature perturbations is implemented in a coupled aerosol and atmospheric circulation model to better represent both subgrid-scale sup...
Cirrus clouds triggered by radiation, a multiscale phenomenon
Cirrus clouds radiation a multiscale phenomenon
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2010/8/13
In this study, the influence of radiative cooling and small eddies on cirrus formation is investigated. For this purpose the non-hydrostatic, anelastic model EULAG is used with a recently developed an...
Modelling of cirrus clouds – Part 2: Competition of different nucleation mechanisms
Modelling of cirrus clouds different nucleation mechanisms
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2009/5/7
We study the competition of two different freezing mechanisms (homogeneous and heterogeneous freezing) in the same environment for cold cirrus clouds. To this goal we use the recently developed and va...
Possible influence of anthropogenic aerosols on cirrus clouds and anthropogenic forcing
anthropogenic aerosols cirrus clouds anthropogenic forcing
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2009/3/13
Cirrus clouds have a net warming effect on the atmosphere and cover about 30% of the Earth's area. Aerosol particles initiate ice formation in the upper troposphere through modes of action that includ...
Modelling of cirrus clouds – Part 1b: Structuring cirrus clouds by dynamics
cirrus clouds Structuring cirrus clouds dynamics
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2009/3/12
A recently developed and validated bulk microphysics scheme for modelling cirrus clouds (Spichtinger and Gierens, 2009), implemented into the anelastic non-hydrostatic model EULAG is used for investig...
Modelling of cirrus clouds – Part 1a: Model description and validation
Modelling of cirrus clouds Model description
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2009/3/12
A double-moment bulk microphysics scheme for modelling cirrus clouds including explicit impact of aerosols on different types of nucleation mechanism is described. Process rates are formulated in term...
Properties of subvisible cirrus clouds formed by homogeneous freezing
subvisible cirrus clouds homogeneous freezing
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2009/3/12
Number concentrations and mean sizes of ice crystals and derived microphysical and optical properties of subvisible cirrus clouds (SVCs) formed by homogeneous freezing of supercooled aerosols are inve...
On the distribution of relative humidity in cirrus clouds
relative humidity cirrus clouds
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2009/2/25
We have analysed relative humidity statistics from measurements in cirrus clouds taken unintentionally during the Measurement of OZone by Airbus In-service airCraft project (MOZAIC). The shapes of the...
The vertical distribution of aerosols, Saharan dust and cirrus clouds in Rome (Italy) in the year 2001
aerosols Saharan dust cirrus clouds Rome
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2009/2/23
A set of 813 lidar profiles of tropospheric aerosol and cirrus clouds extinction and depolarization observed in Rome, Italy, between February 2001 and February 2002 is analyzed and discussed. The year...
Indications of thin cirrus clouds in the stratosphere at mid-latitudes
hin cirrus clouds stratosphere mid-latitudes
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2009/2/19
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are caref...
Chemical characteristics of ice residual nuclei in anvil cirrus clouds: evidence for homogeneous and heterogeneous ice formation
ice residual nuclei anvil cirrus clouds homogeneous and heterogeneous ice formation
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2009/2/16
A counterflow virtual impactor was used to collect residual particles larger than about 0.1 μm diameter from anvil cirrus clouds generated over Florida in the southern United States. A wide variety of...
The impact of cirrus clouds on tropical troposphere-to-stratosphere transport
impact of cirrus clouds tropical troposphere-to-stratosphere transport
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2009/1/12
Although it is well known that air enters the stratosphere preferentially through upwelling in the tropics, the exact mechanisms of troposphere-to-stratosphere transport (TST) are still unknown. Previ...
A modelling study of the impact of cirrus clouds on the moisture budget of the upper roposphere
cirrus clouds moisture budget upper roposphere
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2009/1/6
We present a modelling study of the effect of cirrus clouds on the moisture budget of the layer wherein the cloud formed. Our framework simplifies many aspects of cloud microphysics and collapses the ...