Results 21 to 30 of about 298,312 (304)

CLOUD DETECTION BASED ON DECISION TREE OVER TIBETAN PLATEAU WITH MODIS DATA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Snow cover area is a very critical parameter for hydrologic cycle of the Earth. Furthermore, it will be a key factor for the effect of the climate change. An unbelievable situation in mapping snow cover is the existence of clouds.
L. Xu, S. Fang, R. Niu, J. Li
doaj   +1 more source

Improving Urban Land Cover Classification in Cloud-Prone Areas with Polarimetric SAR Images

open access: yesRemote Sensing, 2021
Urban land cover (ULC) serves as fundamental environmental information for urban studies, while accurate and timely ULC mapping remains challenging due to cloud contamination in tropical and subtropical areas. Synthetic aperture radar (SAR) has excellent
Jing Ling, Hongsheng Zhang, Yinyi Lin
doaj   +1 more source

Arctic clouds in ECHAM6 and their sensitivity to cloud microphysics and surface fluxes [PDF]

open access: yesAtmospheric Chemistry and Physics, 2019
Compared to other climate models, the MPI-ESM/ECHAM6 is one of the few models that is able to realistically simulate the typical two-state radiative structure of the Arctic boundary layer and also is able to sustain liquid water at low temperatures as is
J. Kretzschmar   +3 more
doaj   +1 more source

Contrasting impacts of forests on cloud cover based on satellite observations

open access: yesNature Communications, 2022
How forests influence cloud cover in different regions is not well understood. Here, the authors use satellite data to show that forests enhance clouds over most temperate and boreal forests but inhibited clouds over forests of Amazon, Central Africa ...
Ru Xu   +10 more
doaj   +1 more source

Search for Man-Made Cirrus Contrails over Southeast Asia

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2007
In this study we examine the effect of natural perturbations on cirrus cloud cover in the tropics and we look for possible signal of cirrus contrails in tropical air traffic regions focussing on Southeast Asia, a region that has received much less ...
Christos S. Zerefos   +4 more
doaj   +2 more sources

A collimated flow driven by radiative pressure from the nucleus of quasar Q~1511+091 [PDF]

open access: yes, 2002
High velocity outflows from quasars are revealed by the absorption signatures they produce in the spectrum of the quasar. Clues on the nature and origin of these flows are important for our understanding of the dynamics of gas in the central regions of ...
Hazard, C.   +3 more
core   +3 more sources

Persistent solar signatures in cloud cover: spatial and temporal analysis

open access: yesEnvironmental Research Letters, 2012
A consensus regarding the impact of solar variability on cloud cover is far from being reached. Moreover, the impact of cloud cover on climate is among the least understood of all climate components.
M Voiculescu, I Usoskin
doaj   +1 more source

INVESTIGATION OF CLOUDS AND CLOUD RADIATIVE FORCING ON THE WINDWARD SIDE OF THE MADAGASCAR MOUNTAIN CHAINS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Clouds affect the radiative energy balance of the earth–atmosphere system by reflecting and trapping the radiation. The cooling occurs over the earth by reflecting the incoming solar radiation and warming by trapping the outgoing longwave terrestrial ...
P. Rana, P. Rana, V. Sathiyamoorthy
doaj   +1 more source

Three-Dimensional Urban Land Cover Classification by Prior-Level Fusion of LiDAR Point Cloud and Optical Imagery

open access: yesRemote Sensing, 2021
The heterogeneity of urban landscape in the vertical direction should not be neglected in urban ecology research, which requires urban land cover product transformation from two-dimensions to three-dimensions using light detection and ranging system ...
Yanming Chen   +4 more
doaj   +1 more source

Calculating the Monthly Frequency for Cloud Cover in Baghdad Station

open access: yesAl-Mustansiriyah Journal of Science, 2018
The science developed more there for depending on cloud cover become more through knowing the type of cloud and shape and height with climate changing followed that observing station start built and also systems able to observe cloud cover from surface ...
Osama Tarek Ahmed, Zainab Satar Muhammad
doaj   +1 more source

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