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RISOn Radiation and Latent Heat Feedback in Clouds: Implications and a Parameterization
Publisher: American Meteorological Society
Abstract: Nonadiabatic changes in cloud temperature result from the opposing effects of radiation and the resulting phase change and latent heat caused by this radiative forcing. It is shown that the fraction of ?realized? (net) ...
Homogeneous Ice Nucleation and Supercooled Liquid Water in Orographic Wave Clouds
Publisher: American Meteorological Society
Abstract: This study investigates ice nucleation mechanisms in cold lenticular wave clouds, a cloud type characterized by quasi-steady-state air motions and microphysical properties. It is concluded that homogeneous ice nucleation ...
Relative Humidity and Temperature Influences on Cirrus Formation and Evolution: Observations from Wave Clouds and FIRE II
Publisher: American Meteorological Society
Abstract: Measurements in orographic wave clouds. and in cirrus sampled during FIRE II, are used to investigate ice nucleation in the upper troposphere. The dynamically and microphysically simpler quasi-steady-state wave clouds ...
Evaluation of Liquid Water Measuring Instruments in Cold Clouds Sampled during FIRE
Publisher: American Meteorological Society
Abstract: Liquid water measurements from the Rosemount icing detector (RICE), Particle Measuring Systems (PMS) forward scattering spectrometer probe (FSSP), and Johnson?williams and King hot-wire probes used on the NCAR King Air ...
A Balloon-Borne Continuous Cloud Particle Replicator for Measuring Vertical Profiles of Cloud Microphysical Properties: Instrument Design, Performance, and Collection Efficiency Analysis
Publisher: American Meteorological Society
Abstract: The performance of a balloon-borne Formvar replicator that measures continuous profiles of cloud microphysical properties is investigated. The replicator measures the small particles (<100-?m diameter) that are undetectable ...
Development and Validation of a Time-Lag Correction for Vaisala Radiosonde Humidity Measurements
Publisher: American Meteorological Society
Abstract: This study presents a method of improving the accuracy of relative humidity (RH) measurements from Vaisala RS80 and RS90 radiosondes by applying sensor-based corrections for well-understood sources of measurement error. ...
An Observational and Theoretical Study of Highly Supercooled Altocumulus
Publisher: American Meteorological Society
Abstract: Two altocumulus clouds, which formed at a temperature of ?30°C, were sampled using the NCAR King Air aircraft and coincident lidar during the 1986 FIRE cirrus experiment in Wisconsin. The clouds were structurally and ...
Dry Bias in Vaisala RS90 Radiosonde Humidity Profiles over Antarctica
Publisher: American Meteorological Society
Abstract: Middle to upper tropospheric humidity plays a large role in determining terrestrial outgoing longwave radiation. Much work has gone into improving the accuracy of humidity measurements made by radiosondes. Some radiosonde ...
Characterization and Correction of Relative Humidity Measurements from Vaisala RS80-A Radiosondes at Cold Temperatures
Publisher: American Meteorological Society
Abstract: Radiosonde relative humidity (RH) measurements are known to be unreliable at cold temperatures. This study characterizes radiosonde RH measurements from Vaisala RS80-A thin-film capacitive sensors in the temperature range ...
On the Importance of Vaisala RS92 Radiosonde Humidity Corrections for a Better Agreement between Measured and Modeled Satellite Radiances
Publisher: American Meteorological Society
Abstract: study has been carried out to assess the importance of radiosonde corrections in improving the agreement between satellite and radiosonde measurements of upper-tropospheric humidity. Infrared [High Resolution Infrared ...