搜索结果: 1-15 共查到“大气科学 indirect”相关记录21条 . 查询时间(0.015 秒)
Spanish missions triggered Native American population collapse,indirect impact on climate
Spanish missions Native American population collapse climate
2016/2/22
New interdisciplinary research in the Southwest United States has resolved long-standing debates on the timing and magnitude of American Indian population collapse in the region.The severe and rapid c...
A critical look at spatial scale choices in satellite-based aerosol indirect effect studies
spatial scale choices satellite-based aerosol indirect effect studies
2010/12/20
Analysing satellite datasets over large regions may introduce spurious relationships between aerosol and cloud properties due to spatial variations in aerosol type, cloud regime and synoptic regime cl...
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
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...
In addition to microphysical changes in clouds, changes in nucleation processes of ice cloud due to aerosols would result in substantial changes in cloud top temperature as mildly supercooled clouds a...
Sensitivity studies of different aerosol indirect effects in mixed-phase clouds
different aerosol indirect effects mixed-phase clouds
2009/12/3
Aerosols affect the climate system by changing cloud characteristics. Using the global climate model ECHAM5-HAM, we investigate different aerosol effects on mixed-phase clouds: The glaciation effect, ...
Explicit calculation of indirect global warming potentials for halons using atmospheric models
Explicit calculation halons atmospheric models
2009/11/19
The concept of Global Warming Potentials (GWPs) has been extensively used in policy consideration as a relative index for comparing the climate impact of an emitted greenhouse gas (GHG), relative to c...
Aerosol indirect effects – general circulation model intercomparison and evaluation with satellite data
Aerosol indirect effects general circulation model satellite data
2009/11/19
Aerosol indirect effects continue to constitute one of the most important uncertainties for anthropogenic climate perturbations. Within the international AEROCOM initiative, the representation of aero...
Exploiting the weekly cycle as observed over Europe to analyse aerosol indirect effects in two climate models
Europe aerosol indirect effects climate models
2009/11/19
A weekly cycle in aerosol pollution and some meteorological quantities is observed over Europe. In the present study we exploit this effect to analyse aerosol-cloud-radiation interactions. A weekly cy...
A six year satellite-based assessment of the regional variations in aerosol indirect effects
satellite-based assessment regional variations aerosol indirect effects
2009/6/23
Aerosols act as cloud condensation nuclei (CCN) for cloud water droplets, and changes in aerosol concentrations have significant microphysical impacts on the corresponding cloud properties. Moderate R...
Aerosol indirect forcing in a global model with particle nucleation
Aerosol indirect forcing global model particle nucleation
2009/3/12
The number concentration of cloud condensation nuclei (CCN) formed as a result of anthropogenic emissions is a key uncertainty in the study of aerosol indirect forcing and global climate change. Here,...
DMS atmospheric concentrations and sulphate aerosol indirect radiative forcing: a sensitivity study to the DMS source representation and oxidation
DMS atmospheric concentrations sulphate aerosol radiative forcing
2009/3/10
The global sulphur cycle has been simulated using a general circulation model with a focus on the source and oxidation of atmospheric dimethylsulphide (DMS). The sensitivity of atmospheric DMS to the ...
Global indirect aerosol effects: a review
aerosol effect climate system global climate models
2009/2/7
Aerosols affect the climate system by changing cloud characteristics in many ways. They act as cloud condensation and ice nuclei, they may inhibit freezing and they could have an influence on the hydr...
Impact of cloud-borne aerosol representation on aerosol direct and indirect effects
cloud-borne aerosol representation aerosol direct indirect effects
2009/1/15
Aerosol particles attached to cloud droplets are much more likely to be removed from the atmosphere and are much less efficient at scattering sunlight than if unattached. Models used to estimate direc...
Uncertainty analysis for estimates of the first indirect aerosol effect
Uncertainty analysis first indirect aerosol effect
2009/1/14
The IPCC has stressed the importance of producing unbiased estimates of the uncertainty in indirect aerosol forcing, in order to give policy makers as well as research managers an understanding of the...
Oxalic acid as a heterogeneous ice nucleus in the upper troposphere and its indirect aerosol effect
Oxalic acid heterogeneous ice nucleus upper troposphere
2009/1/13
Heterogeneous ice freezing points of aqueous solutions containing various immersed solid dicarboxylic acids (oxalic, adipic, succinic, phthalic and fumaric) have been measured with a differential scan...