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A new convective cloud field model based on principles of self-organisation
convective cloud field model principles of self-organisation AGCM
2009/2/18
A new cumulus convection parameterisation is presented in this paper. The parameterisation uses an explicit spectral approach and determines, unlike other convection schemes, for each convection event...
Distinction between clouds and ice/snow covered surfaces in the identification of cloud-free observations using SCIAMACHY PMDs
clouds ice/snow covered surfaces cloud-free SCIAMACHY PMDs
2009/2/18
SCIAMACHY on ENVISAT allows measurement of different trace gases including those most abundant in the troposphere (e.g. CO2, NO2, CH4, BrO, SO2). However, clouds in the observed scenes can severely hi...
CCN activation and cloud processing in sectional aerosol models with low size resolution
CCN activation cloud processing sectional aerosol models low size resolution
2009/2/17
We investigate the influence of low size resolution, typical to sectional aerosol models in large scale applications, on cloud droplet activation and cloud processing of aerosol particles. A simplifie...
CLABAUTAIR: a new algorithm for retrieving three-dimensional cloud structure from airborne microphysical measurements
algorithm three-dimensional cloud structure airborne microphysical measurements
2009/2/17
A new algorithm is presented to reproduce the three-dimensional structure of clouds from airborne measurements of microphysical parameters. Data from individual flight legs are scanned for characteris...
The Indian summer monsoon rainfall: interplay of coupled dynamics, radiation and cloud microphysics
Indian summer monsoon rainfall coupled dynamics radiation cloud microphysics
2009/2/16
The Indian summer monsoon rainfall (ISMR), which has a strong connection to agricultural food production, has been less predictable by conventional models in recent times. Two distinct years 2002 and ...
Is there a trend in cirrus cloud cover due to aircraft traffic?
Is there a trend in cirrus cloud cover due to aircraft traffic?
2009/2/16
Trends in cirrus cloud cover have been estimated based on 16 years of data from ISCCP (International Satellite Cloud Climatology Project). The results have been spatially correlated with aircraft dens...
Spectral actinic flux in the lower troposphere: measurement and 1-D simulations for cloudless, broken cloud and overcast situations
Spectral actinic flux lower troposphere 1-D simulations broken cloud overcast situations
2009/2/12
In September 2002, the first INSPECTRO campaign to study the influence of clouds on the spectral actinic flux in the lower troposphere was carried out in East Anglia, England. Measurements of the acti...
Modelling the impact of noctilucent cloud formation on atomic oxygen and other minor constituents of the summer mesosphere
noctilucent cloud formation atomic oxygen minor constituents summer mesosphere
2009/2/8
The formation, evolution and eventual sublimation of noctilucent clouds (NLC) may have a significant effect on the odd oxygen and hydrogen chemistry of the high latitude summer mesosphere. Three mecha...
Influence of mountain waves and NAT nucleation mechanisms on polar stratospheric cloud formation at local and synoptic scales during the 1999-2000 Arctic winter
mountain waves NAT nucleation mechanisms polar stratospheric cloud formation Arctic winter
2009/2/7
A scheme for introducing mountain wave-induced temperature pertubations in a microphysical PSC model has been developed. A data set of temperature fluctuations attributable to mountain waves as comput...
Polar stratospheric cloud observations by MIPAS on ENVISAT: detection method, validation and analysis of the northern hemisphere winter 2002/2003
Polar stratospheric cloud observations MIPAS ENVISAT northern hemisphere winter
2009/2/7
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on ENVISAT has made extensive measurements of polar stratospheric clouds (PSCs) in the northern hemisphere winter 2002/2003. A PSC...
Cloud droplet activation and surface tension of mixtures of slightly soluble organics and inorganic salt
Cloud droplet activation slightly soluble organics inorganic salt
2009/2/6
Critical supersaturations for internally mixed particles of adipic acid, succinic acid and sodium chloride were determined experimentally for dry particles sizes in the range 40-130nm. Surface tension...
Commentary on cloud modelling and the mass accommodation coefficient of water
cloud modelling mass accommodation coefficient water
2009/2/6
The mass accommodation coefficient of water is a quantity for which different experimental techniques have yielded conflicting values in the range 0.04-1. From the viewpoint of cloud modelling, this i...
Technical Note: Evaporation of polar stratospheric cloud particles, in situ, in a heated inlet
polar stratospheric cloud particles situ heated inlet
2009/1/23
In December 2001 and 2002 in situ aerosol measurements were made from balloon-borne platforms within polar stratospheric clouds (PSC) which contained particles of supercooled ternary solution (STS), n...
What does reflection from cloud sides tell us about vertical distribution of cloud droplet sizes?
reflection from cloud sides vertical distribution cloud droplet sizes
2009/1/20
Cloud development, the onset of precipitation and the effect of aerosol on clouds depend on the structure of the cloud profiles of droplet size and phase. Aircraft measurements of cloud profiles are l...
Probing ice clouds by broadband mid-infrared extinction spectroscopy: case studies from ice nucleation experiments in the AIDA aerosol and cloud chamber
Probing ice clouds broadband mid-infrared extinction spectroscopy ice nucleation experiments AIDA aerosol cloud chamber
2009/1/16
Series of infrared extinction spectra of ice crystals were recorded in the 6000–800 cm−1 wavenumber regime during expansion cooling experiments in the large aerosol and cloud chamber AIDA of For...