نتایج جستجو برای: cirrus hd
تعداد نتایج: 21322 فیلتر نتایج به سال:
Cirrus clouds are composed of ice crystals condensed from humidity due to low temperature condition in the upper atmosphere. The microphysics of cirrus clouds including sizes and shapes of ice particles are not well understood but are important in climate modeling. Ice crystal will fall under gravitational sedimentation to reach terminal velocities which depend on the size, mass, and ice habit....
Thin tropical cirrus layers sometimes extend hundreds of kilometers horizontally and often persist for time periods of several hours to more than a day before dissipating. Due to their ubiquity and location in the very cold tropical upper troposphere and above the very warm tropical ocean, tropical cirrus clouds play a major role in the earth’s radiation budget (Liou 1986). Despite their impact...
In order to improve the representation of clouds in climate models, we require a better understanding of the relationship among cloud properties and the synoptic-scale state of the atmosphere. In order to investigate this issue as it pertains to a specific class of cirrus clouds, we have combined a 2 month data set of radar reflectivities observed at State College, Pennsylvania, using a W-band ...
BACKGROUND AND OBJECTIVE To compare two spectral-domain optical coherence tomography (SD-OCT) instruments in identifying the boundaries of retinal pigment epithelium detachment (PED). PATIENTS AND METHODS 27 eyes were scanned with Cirrus and Spectralis SD-OCT instruments during a single visit. Two Cirrus scan patterns were used: the 512 × 128 and 200 × 200 covering a 6 × 6 mm (20° × 20°) area...
[1] The redistribution of HNO3 via uptake and sedimentation by cirrus cloud particles is considered an important term in the upper tropospheric budget of reactive nitrogen. Numerous cirrus cloud encounters by the NASA WB-57F high-altitude research aircraft during the Cirrus Regional Study of Tropical Anvils and Cirrus Layers-Florida Area Cirrus Experiment (CRYSTAL-FACE) were accompanied by the ...
[1] To improve our understanding of cirrus cloud radiative impact on the current and future climate, improved knowledge of cirrus cloud microphysical properties is needed. However, long-term studies of the problem indicate that accurate cirrus cloud measurements are challenging. This is true for both, remote sensing as well as in situ sampling. This study presents a new method to remotely sense...
Identifying the mechanisms responsible for the formation of cirrus clouds is important in understanding the role of cirrus in the tropical atmosphere. Thin cirrus clouds near the tropical tropopause transition layer (TTL) can have significant impacts on the radiative heating in the upper troposphere. These clouds may also affect the transport of water vapor through the TTL into the stratosphere...
To described enhanced imaging for visualization of anatomic features and microstructures Bergmeister papilla within the optic nerve in asymptomatic patient. Primary measure is to see any change morphological characteristic patient with papillae. Secondary outcome measures effect on parameters OCT Carl Zeiss Cirrus HD 21 Line Raster Model 5000 scanning protocol disc cube 200×200 program obtains ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید