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A new actinic flux 4p-spectroradiometer：instrument design and application to clear sky and broken cloud conditions
actinic flux 4p-spectroradiometer clear sky broken cloud conditions
2009/3/11
A new 4p-spectroradiometer was developed for measuring actinic flux especially under cloudy conditions based on a fixed grating imaging spectrograph and a CCD-detector leading to a simultaneous measur...
Cirrus cloud occurrence as function of ambient relative humidity: a comparison of observations obtained during the INCA experiment
Cirrus cloud occurrence ambient relative humidity INCA experiment
2009/3/11
Based on in-situ observations performed during the Interhemispheric differences in cirrus properties from anthropogenic emissions (INCA) experiment, we introduce and discuss the cloud presence fractio...
Freezing thresholds and cirrus cloud formation mechanisms inferred from in situ measurements of relative humidity
Freezing thresholds cirrus cloud formation mechanisms humidity
2009/3/11
Factors controlling the microphysical link between distributions of relative humidity above ice saturation in the upper troposphere and lowermost stratosphere and cirrus clouds are examined with the h...
This work examines changes in cirrus cloud cover (CCC) in possible association with aviation activities at congested air corridors. The analysis is based on the latest version of the International Sat...
Ultrathin Tropical Tropopause Clouds（UTTCs）：I. Cloud morphology and occurrence
Ultrathin Tropical Tropopause Clouds UTTCs Cloud morphology
2009/3/11
Subvisible cirrus clouds (SVCs) may contribute to dehydration close to the tropical tropopause. The higher and colder SVCs and the larger their ice crystals, the more likely they represent the last ef...
The roles of dynamical variability and aerosols in cirrus cloud formation
dynamical variability aerosols cirrus cloud formation
2009/3/11
The probability of occurrence of ice crystal number densities in young cirrus clouds is examined based on airborne measurements. The observations have been carried out at midlatitudes in both hemisphe...
Organic acids as cloud condensation nuclei：Laboratory studies of highly soluble and insoluble species
Organic acids cloud condensation nuclei soluble and insoluble species
2009/3/10
The ability of sub-micron-sized organic acid particles to act as cloud condensation nuclei (CCN) has been examined at room temperature using a newly constructed continuous-flow, thermal-gradient diffu...
Modeling the chemical effects of ship exhaust in the cloud-free marine boundary layer
chemical effects ship exhaust cloud-free marine boundary layer
2009/3/10
The chemical evolution of the exhaust plumes of ocean-going ships in the cloud-free marine boundary layer is examined with a box model. Dilution of the ship plume via entrainment of background air was...
Estimated variability of below-cloud aerosol removal by rainfall for observed aerosol size distributions
below-cloud aerosol removal rainfall observed aerosol size distributions
2009/3/10
Below-cloud scavenging (BCS) coefficients of aerosols by rainfall are estimated for reported aerosol size distributions measured during field experiments in various environments. The method employed i...
The potential of polarization measurements from space at mm and sub-mm wavelengths for determining cirrus cloud parameters
polarization measurements mm and sub-mm wavelengths cirrus cloud parameters
2009/3/10
The millimeter and sub-millimeter waves have been attracting a lot of attention recently in the cloud remote sensing community. This is largely because of their potential use in measuring cirrus cloud...
Remote sensing of water cloud droplet size distributions using the backscatter glory: a case study
water cloud droplet size distributions backscatter glory Remote sensing
2009/3/3
Cloud single scattering properties are mainly determined by the effective radius of the droplet size distribution. There are only few exceptions where the shape of the size distribution affects the op...
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland
jet stream gravity wave ice cloud Greenland
2009/3/3
A polar stratospheric ice cloud (PSC type II) was observed by airborne lidar above Greenland on 14 January 2000. It was the unique observation of an ice cloud over Greenland during the SOLVE/THESEO 20...
Explicit simulations of aerosol physics in a cloud-resolving model: a sensitivity study based on an observed convective cloud
Explicit simulations aerosol physics cloud-resolving model observed convective cloud
2009/2/26
The role of convection in introducing aerosols and promoting the formation of new particles to the upper troposphere has been examined using a cloud-resolving model coupled with an interactive explici...
Cloud chemistry at the Puy de Dôme: variability and relationships with environmental factors
Cloud chemistry Puy de Dô me environmental factors
2009/2/26
The chemical composition of cloud water was investigated during the winter-spring months of 2001 and 2002 at the Puy de Dôme station (1465 m above sea level, 45°46′22′′ N, 2°57′43′′ E) in an eff...
Retrieval methods of effective cloud cover from the GOME instrument: an intercomparison
Retrieval methods effective cloud cover GOME instrument
2009/2/20
The radiative scattering by clouds leads to errors in the retrieval of column densities and concentration profiles of atmospheric trace gas species from satellites. Moreover, the presence of clouds ch...