منابع مشابه
How Important is Organic Aerosol Hygroscopicity to Aerosol Indirect Forcing?
Organics are among the most abundant aerosol components in the atmosphere. However, there are still large uncertainties with emissions of primary organic aerosol (POA) and volatile organic compounds (VOCs) (precursor gases of secondary organic aerosol, SOA), formation of SOA, and chemical and physical properties (e.g., hygroscopicity) of POA and SOA. All these may have significant impacts on ae...
متن کاملWill black carbon mitigation dampen aerosol indirect forcing?
[1] If mitigation of black carbon (BC) particulate matter is accompanied by a decrease in particle number emissions, and thereby by a decrease in global cloud condensation nuclei (CCN) concentrations, a decrease in global cloud radiative forcing (a reverse “cloud albedo effect”) results. We consider two present‐day mitigation scenarios: 50% reduction of primary black carbon/organic carbon (BC/O...
متن کاملIndirect Radiative Forcing by Ion-Mediated Nucleation of Aerosol
A clear understanding of particle formation mechanisms is critical for assessing aerosol indirect radiative forcing and associated climate feedback processes. Recent studies reveal the importance of ion-mediated nucleation (IMN) in generating new particles and cloud condensation nuclei (CCN) in the atmosphere. Here we implement the IMN scheme into the Community Atmosphere Model version 5 (CAM5)...
متن کاملAerosol-Cloud Interactions In Global Models Of Indirect Aerosol Radiative Forcing
The sensitivity of cloud optical properties with respect to parameters that affect aerosol activation is examined. Of particular interest are the effect of volatile gases (such as HNOs), slightly soluble and surfactant species. An adiabatic parcel model is used to simulate cloud droplet formation. Cloud optical properties are calculated from these simulations.
متن کاملAerosol absorption and radiative forcing
We present a comprehensive examination of aerosol absorption with a focus on evaluating the sensitivity of the global distribution of aerosol absorption to key uncertainties in the process representation. For this purpose we extended the comprehensive aerosol-climate model ECHAM5HAM by effective medium approximations for the calculation of aerosol effective refractive indices, updated black car...
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ژورنال
عنوان ژورنال: Science
سال: 2000
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.290.5491.407a