Particle precipitation during NEIAL events: simultaneous ground based nighttime observations at Svalbard

6a.6 Comparing Trmm and Ground-based Radar Observations in Israel during Intense Precipitation Events in March 2003

Ground-based and TRMM precipitation radars provide a complementary view: the Ground-based Radar (GR) measures rain from a lateral direction, while the TRMM radar sees it from the top. There are enormous differences between these two instruments. Mention can be made of the different operation frequencies, sampling volumes, geometrical viewing angles, attenuation, sensitivity and times of acquisi...

Observations of nighttime new particle formation in the troposphere

[1] We present atmospheric observations which indicate efficient new particle formation during the nighttime in the troposphere under low condensation sinks, in contrast to the current prevailing assumption that aerosol nucleation takes place only during the daytime and typically from sulfuric acid. High concentrations of ultrafine particles with diameters from 4 to 9 nm ( 1000 cm ) were measur...

Comparing satellite and ground-based observations of paroxysmal degassing events at Etna volcano, Italy

Cloud Phase Determination Using Ground-Based AERI Observations at SHEBA

A new technique for ascertaining the thermodynamic cloud phase from high-spectral-resolution ground-based infrared measurements made by the Atmospheric Emitted Radiance Interferometer (AERI) is presented. This technique takes advantage of the differences in the index of refraction of ice and water between 11 and 19 mm. The differences in the refractive indices translate into differences in clou...

Analysis of radiosonde measurements by ground- and satellite-based simultaneous observations during the Water Vapor IOP 2004 experiment

Water vapor and clouds play a key role in controlling the earth's climate, through greenhouse trapping of radiation and the feedback on global sea surface temperature and ice coverage (Curry et al., 1996). Therefore, accurate measurements of the atmospheric water vapor (WV) and cloud properties are essential for the improvement in modelling radiation energy budget. On the other hand, there are ...