Results 31 to 40 of about 21,915 (232)
Properties of ice cloud over Beijing from surface Ka-band radar observations during 2014–2017 [PDF]
Atmospheric Chemistry and Physics, 2020 The physical properties and radiative role of ice clouds remain one of the uncertainties in the Earth–atmosphere system. In this study, we present a detailed analysis of ice cloud properties based on 4 years of surface millimeter-wavelength radar ...
J. Huo +7 more
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Investigating an indirect aviation effect on mid-latitude cirrus clouds – linking lidar-derived optical properties to in situ measurements [PDF]
Atmospheric Chemistry and Physics, 2023 Aviation has a large impact on the Earth's atmosphere and climate by various processes. Line-shaped contrails and contrail cirrus clouds lead to changes in the natural cirrus cloud cover and have a major contribution to the effective radiative forcing ...
S. Groß +9 more
doaj +1 more source
Revealing halos concealed by cirrus clouds
Atmospheric Measurement Techniques, 2023 Abstract. Many types of halos (including arcs) appear in the sky. Each type of halo corresponds to the shape and orientation of ice crystals in clouds, and reflects the state of the atmosphere; therefore observing them from the ground greatly helps in understanding the state of the atmosphere.
openaire +4 more sources
HNO3 partitioning in cirrus clouds [PDF]
Geophysical Research Letters, 1999 During the 1997 POLSTAR‐1 winter campaign in northern Sweden a flight was performed across a cold trough of air (≃ 196 K) in the tropopause region. Measurements of total water vapour, nitric acid, particles and reactive nitrogen (NOy) were taken. The particle measurements indicate that about 3% of the particles in the moist tropospheric air were ice ...
Meilinger, S. +12 more
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On the signature of the cirrus twilight zone
Environmental Research Letters, 2014 Cirrus clouds are known to play a key role in the climate system, but their overall effect on Earth’s radiation budget is not yet fully quantified. The uncertainties are, in part, due to ambiguities in cirrus extent or coverage. Here we show that despite
Uri Wollner +3 more
doaj +1 more source
The effects of warm-air intrusions in the high Arctic on cirrus clouds [PDF]
Atmospheric Chemistry and PhysicsWarm-air intrusions (WAIs) are responsible for the transportation of warm and moist air masses from the mid-latitudes into the high Arctic (> 70° N). In this work, we study cirrus clouds that form during WAI events (WAI cirrus) and during undisturbed ...
G. Dekoutsidis, M. Wirth, S. Groß
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Climate change creativity for cirrus clouds and contrails control [PDF]
, 2015 Cirrus ice clouds formed normally in the upper troposphere and contrails, shed by aircraft, impact climate and global warming due to prevailing cirrus clouds ice water content and crystal size.
Djojodihardjo, Harijono
core +1 more source
Thin and subvisible cirrus and contrails in a subsaturated environment [PDF]
Atmospheric Chemistry and Physics, 2011 The frequency of occurrence of cirrus clouds and contrails, their life time, ice crystal size spectra and thus their radiative properties depend strongly on the ambient distribution of the relative humidity with respect to ice (RH<sub>ice< ...
M. Kübbeler +15 more
doaj +1 more source
Advances in Space Research, 1986 Abstract At infrared wavelengths many thin, low mass dust clouds are observed at high galactic latitudes. In this paper a number of observations, including optical observations related to these “cirrus” clouds are discussed. The clouds are excellently suitable for studies of grain properties and of the surrounding radiation field.
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Weather, EarlyView.Lowest‐layer cloud base height (CBH) measurements obtained between July 2018 and December 2019 from four ceilometers at the Korea Standard Meteorological Observatory were compared to determine how ceilometer installation angle differentially affects CBH measurements.
Jaewon Kim +3 more
wiley +1 more source