ice clouds
A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic
... FIRR-retrieved clouds’ properties with CALIPSO data also suggests that the FIRR is an adequate tool to detect and char- acterize ice clouds, which is its primary ...of clouds properties and ...
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Ash and ice clouds during the Mt Kelud February 2014 eruption as interpreted from IASI and AVHRR/3 observations
... the ice and ash cloud properties that best reproduced the IASI spectra for the scenes shown in ...The ice wa- ter content, ice cloud height, and volcanic ash mass load are shown together with the ...
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Observing ice clouds in the submillimeter spectral range: the CloudIce mission proposal for ESA’s Earth Explorer 8
... on ice clouds, particularly on the so far poorly characterized “essential climate variable” ice water path (IWP) and on ice particle ...cloud ice data (retrieval algorithms) and ...
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Airborne validation of radiative transfer modelling of ice clouds at millimetre and sub-millimetre wavelengths
... cloud ice relies on the scattering of warm upwelling radia- tion, which is typically emitted by water vapour in the lower troposphere, leading to reduced brightness temperatures in the presence of ice ...
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Influence of gravity waves on the climatology of high altitude Martian carbon dioxide ice clouds
... could not reproduce all of their features (González-Galindo et al., 2011). This study revealed the role of thermal tides in cloud formations and the authors suggested that the discrep- ancies could be caused by the ...
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Use of spectral cloud emissivities and their related uncertainties to infer ice cloud boundaries: methodology and assessment using CALIPSO cloud products
... thick, clouds composed of ice particles. This study demonstrates that ice cloud emissivity uncertain- ties can be used to provide a reasonable range of ice cloud layer boundaries, ...Here ...
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Layered phenomena in the mesopause region
... This special issue of the Journal of Atmospheric and Solar-Terrestrial Physics comprises a collection of papers which were mostly presented at the 11 th Layered Phenomena in the Mesopause Region (LPMR) Workshop, held at ...
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The Ice Selective Inlet: a novel technique for exclusive extraction of pristine ice crystals in mixed-phase clouds
... mixed-phase clouds (MPCs) is presently poorly understood, and field studies on the physical and chemical characteristics of IN are sparse (Cantrell and Heymsfield, ...high-altitude ice clouds using a ...
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Retrieval of radiative and microphysical properties of clouds from multispectral infrared measurements
... thin ice clouds over optically thick liquid clouds, shortwave reflectances could be sensitive to the lower ...the ice fraction changes abruptly at a CTT of about –33 °C (~240 ...that ...
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Model-dependence of the CO 2threshold for melting the hard Snowball Earth
... ing of the cloud layer has two opposite effects on longwave cloud forcing. First, ice clouds at higher levels have stronger greenhouse effect since clouds emit less outgoing infrared ra- diation ...
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Theory of growth by differential sedimentation, with application to snowflake formation
... Ice crystal aggregates have been studied through the use of cloud particle imagers during aircraft flights through ice clouds. Sample images from such a flight are shown in figure 5, alongside some ...
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Structural optimization of molecular clusters with density functional theory combined with basin hopping
... The study of water clusters can aid understanding of the formation of ice, clouds, solution chemistry, and many biochemical processes.32 Methanol is a simple organic molecule that has bo[r] ...
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The Impact of Mesoscale Processes on the Atmospheric Circulation of Mars
... the planetary-scale circulation, ~10 -2 ms -1 , so when dust is injected into the atmosphere at presumably higher vertical velocities, it will tend to rise or remain stable in zones of mean upwelling but sink more ...
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The relevance of nanoscale biological fragments for ice nucleation in clouds
... Sample Preparation. Freeze-dried cultures of F. avenaceum were obtained from the Commonwealth Agricultural Bureaux International (CABI). The F. avenaceum were plated on potato dextrose sucrose agar and incubated for 28 ...
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Automatic tuning of the Community Atmospheric Model (CAM5) by using short-term hindcasts with an improved downhill simplex optimization method
... high clouds and sediment ve- locity of ice crystals, which act to increase the high cloud amount and increase the longwave cloud forcing, thereby re- ducing its significant underestimation in the default ...
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Albedo-Ice Regression method for determining ice water content of polar mesospheric clouds using ultraviolet observations from space
... the ice particle col- umn density, multiple linear relationships are established be- tween IWC and cloud directional albedo, depending upon scattering ...For Ice Experiment (SOFIE), which provides IWC and ...
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Discrepancy between Ice Particles and Ice Nuclei in Mixed Clouds: Critical Aspects
... small ice crystals growing in the presence of supercooled droplets (unstable system) trig- ger the freezing of fast evaporating droplets (Wegener-Bergeron-Findeisen pro- cess) even at much higher temperatures ...
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Cloud and DNI nowcasting with MSG/SEVIRI for the optimized operation of concentrating solar power plants
... all clouds with a focus on clouds which are relevant for CSP ...since clouds are highly variable in space and ...of clouds that are first split up into two (vertically overlapping) layers in ...
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Comparing model and measured ice crystal concentrations in orographic clouds during the INUPIAQ campaign
... high ice num- ber concentrations observed in orographic clouds by com- paring in situ measurements from the Ice NUcleation Pro- cess Investigation And Quantification field campaign (INU- PIAQ) at ...
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Water deuteration and ortho-to-para nuclear spin ratio of H_2 in molecular clouds formed via the accumulation of H I gas
... quency of either species A or B (Garrod & Pauly 2011). The bar- riers are assumed to be overcome either thermally or via quan- tum tunneling, whichever is faster. Transmission probabilities (probabilities of ...
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