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Parametric representation of the cloud droplet spectra for LES warm bulk microphysical schemes
the cloud droplet spectra LES warm bulk microphysical schemes
2010/8/13
Parametric functions are currently used to represent droplet spectra in clouds and to develop bulk parameterizations of the microphysical processes and of their interactions with radiation. The most f...
High resolution modeling of CO2 over Europe: implications for representation errors of satellite retrievals
CO2 Europe satellite retrievals
2010/1/18
Satellite retrievals for column CO2 with better spatial and temporal sampling are expected to improve the current surface flux estimates of CO2 via inverse techniques. However, the spatial scale misma...
The representation of dust transport and missing urban sources as major issues for the simulation of PM episodes in a Mediterranean area
dust transport missing urban sources major issues PM episodes Mediterranean area
2009/11/9
Due to its adverse effects on human health, atmospheric particulate matter (PM) constitutes a growing challenge for air quality management. It is also a complex subject of study. The understanding of ...
Long's equation describes two dimensional stratified atmospheric flow over terrain. Its solutions using regular first order perturbations and linear approximation were investigated analytically and nu...
How important is the vertical structure for the representation of aerosol impacts on the diurnal cycle of marine stratocumulus?
vertical structure aerosol impacts diurnal cycle marine stratocumulus
2009/6/22
Large-Eddy Simulations (LES) are performed to examine the impact of hygroscopic aerosols on the diurnal cycle of marine stratocumulus clouds, under varying meteorological forcing conditions. When the ...
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 ...
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...
Characterization of the organic composition of aerosols from Rondônia, Brazil, during the LBA-SMOCC 2002 experiment and its representation through model compounds
organic composition of aerosols Rondô nia Brazil LBA-SMOCC 2002 experiment
2008/12/31
The chemical composition of carbonaceous aerosols collected during the LBA-SMOCC field experiment, conducted in Rondônia, Brazil, in 2002 during the transition from the dry to the wet season, wa...
Towards a better representation of the solar cycle in general circulation models
solar cycle general circulation models
2008/12/23
We introduce the improved Freie Universität Berlin (FUB) high-resolution radiation scheme FUBRad and compare it to the 4-band standard ECHAM5 SW radiation scheme of Fouquart and Bonnel (FB). Both...
A single parameter representation of hygroscopic growth and cloud condensation nucleus activity
hygroscopic growth cloud condensation nucleus
2008/12/8
We present a method to describe the relationship between particle dry diameter and cloud condensation nuclei (CCN) activity using a single hygroscopicity parameter κ. Values of the hygroscopicity para...
Simplified representation of atmospheric aerosol size distributions using absolute principal component analysis
atmospheric aerosol size distributions principal component
2008/12/1
Principal component analysis provides a fast and robust method to reduce the data dimensionality of an aerosol size distribution data set. Here we describe a methodology for applying principal compone...
Corrigendum to "Impact of cloud-borne aerosol representation on aerosol direct and indirect effects" published in Atmos. Chem. Phys., 6, 4163–4174, 2006
cloud-borne aerosol representation aerosol
2008/11/28
Corrigendum to "Impact of cloud-borne aerosol representation on aerosol direct and indirect effects" published in Atmos. Chem. Phys., 6, 4163–4174, 2006.
Modelling representation errors of atmospheric CO2 mixing ratios at a regional scale
atmospheric CO2 regional scale
2008/11/26
Inverse modelling of carbon sources and sinks requires an accurate quality estimate of the modelling framework to obtain a realistic estimate of the inferred fluxes and their uncertainties. So-called ...
A single parameter representation of hygroscopic growth and cloud condensation nucleus activity – Part 2: Including solubility
parameter representation hygroscopic growth cloud condensation nucleus activity
2008/11/24
The ability of a particle to serve as a cloud condensation nucleus in the atmosphere is determined by its size, hygroscopicity and its solubility in water. Usually size and hygroscopicity alone are su...
Effect of explicit urban land surface representation on the simulation of the 26 July 2005 heavy rain event over Mumbai, India
explicit urban land heavy rain Mumbai India
2008/11/24
We investigate whether explicit representation of the urban land surface improves the simulation of the record-breaking 24-h heavy rain event that occurred over Mumbai, India on 26 July 2005 as the ev...