Understanding Satellite Cirrus Cloud Climatologies with Calibrated Lidar Optical Depths

Understanding Satellite Cirrus Cloud Climatologies with Calibrated Lidar Optical Depths
Author: Donald P. Wylie
Publisher:
Total Pages: 40
Release: 1994
Genre:
ISBN:
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Optical depth measurements of transmissive cirrus clouds were made using coincident lidar and satellite data to improve our interpretation of recent satellite cloud climatologies. These climatologies differ in the way they detect transmissive clouds because some use solar reflectance data (ISCCP) while other use multi-spectral infrared data (CO2 Slicing). To relate these climatologies and estimate the impact of transmissive clouds on the earth's heat budget, a relationship between visible and infrared radiation properties has to be used. We examined the popular assumption that the ratio of the visible to infrared optical depths should be 2.0 because the visible extinction cross section is twice the infrared absorption cross section when cloud particles are large compared to the wavelength.

Cirrus

Cirrus
Author: David K. Lynch
Publisher: Oxford University Press
Total Pages: 516
Release: 2002-01-24
Genre: Science
ISBN: 9780195351392
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Cirrus clouds are high, thin, tropospheric clouds composed predominately of ice. In the last ten years, considerable work has shown that cirrus is widespread--more common than previously believed--and has a significant impact on climate and global change. As the next generation weather satellites are being designed, the impact of cirrus on remote sensing and the global energy budget must be recognized and accommodated. This book, the first to be devoted entirely to cirrus clouds, captures the state of knowledge of cirrus and serves as a practical handbook as well. Each chapter is based on an invited review talk presented at Cirrus, a meeting hosted by the Optical Society of America and co-sponsored by the American Geophysical Union and the American Meteorological Society. All aspects of cirrus clouds are covered, an approach that reaches into diverse fields. Topics include: the definition of cirrus, cirrus climatologies, nucleation, evolution and dissipation, mixed-phase thermodynamics, crystallinity, orientation mechanisms, dynamics, scattering, radiative transfer, in situ sampling, processes that produce or influence cirrus (and vice versa), contrails, and the influence of cirrus on climate.

Lidar Cloud Studies for Fire and Eclips

Lidar Cloud Studies for Fire and Eclips
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Total Pages: 38
Release: 2018-07-05
Genre:
ISBN: 9781722338466
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Optical remote sensing measurements of cirrus cloud properties were collected by one airborne and four ground-based lidar systems over a 32 h period during this case study from the First ISCCP (International Satellite Cloud Climatology Program) Regional Experiment (FIRE) Intensive Field Observation (IFO) program. The lidar systems were variously equipped to collect linear depolarization, intrinsically calibrated backscatter, and Doppler velocity information. Data presented describe the temporal evolution and spatial distribution of cirrus clouds over an area encompassing southern and central Wisconsin. The cirrus cloud types include: dissipating subvisual and thin fibrous cirrus cloud bands, an isolated mesoscale uncinus complex (MUC), a large-scale deep cloud that developed into an organized cirrus structure within the lidar array, and a series of intensifying mesoscale cirrus cloud masses. Although the cirrus frequently developed in the vertical from particle fall-streaks emanating from generating regions at or near cloud tops, glaciating supercooled (-30 to -35 C) altocumulus clouds contributed to the production of ice mass at the base of the deep cirrus cloud, apparently even through riming, and other mechanisms involving evaporation, wave motions, and radiative effects are indicated. The generating regions ranged in scale from approximately 1.0 km cirrus uncinus cells, to organized MUC structures up to approximately 120 km across. Sassen, Kenneth and Grund, Christian J. and Spinhirne, James D. and Hardesty, Michael and Alvarez, James Goddard Space Flight Center; Langley Research Center NAG1-868...

Global Statistics on Cloud Optical Depths From Satellite and Lidar Observations

Global Statistics on Cloud Optical Depths From Satellite and Lidar Observations
Author:
Publisher:
Total Pages: 0
Release: 1995
Genre:
ISBN:
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Six years of cloud data have been collected globally from the NOAA satellite series. The High Resolution Infrared Radiometer Spectrometer (HIRS) data were used to detect clouds and estimate their optical depths in the 11 micron infrared window. The cloud detection algorithm has been called the CO2 Slicing Algorithm because it uses the 13-15 micron infrared channels where partial CO2 absorption occurs, to detect partially transparent clouds and correctly determine their altitude. This algorithm is designed to be sensitive to upper tropospheric cirrus clouds which are difficult to detect. The frequency of these clouds along with their global distribution and seasonal changes have been reported at past CIDOS conferences.

Encyclopedia of Optical and Photonic Engineering (Print) - Five Volume Set

Encyclopedia of Optical and Photonic Engineering (Print) - Five Volume Set
Author: Craig Hoffman
Publisher: CRC Press
Total Pages: 3726
Release: 2015-09-22
Genre: Science
ISBN: 1351247174
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The first edition of the Encyclopedia of Optical and Photonic Engineering provided a valuable reference concerning devices or systems that generate, transmit, measure, or detect light, and to a lesser degree, the basic interaction of light and matter. This Second Edition not only reflects the changes in optical and photonic engineering that have occurred since the first edition was published, but also: Boasts a wealth of new material, expanding the encyclopedia’s length by 25 percent Contains extensive updates, with significant revisions made throughout the text Features contributions from engineers and scientists leading the fields of optics and photonics today With the addition of a second editor, the Encyclopedia of Optical and Photonic Engineering, Second Edition offers a balanced and up-to-date look at the fundamentals of a diverse portfolio of technologies and discoveries in areas ranging from x-ray optics to photon entanglement and beyond. This edition’s release corresponds nicely with the United Nations General Assembly’s declaration of 2015 as the International Year of Light, working in tandem to raise awareness about light’s important role in the modern world. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]

Atmospheric Propagation, Adaptive Systems, and Lidar Techniques for Remote Sensing II

Atmospheric Propagation, Adaptive Systems, and Lidar Techniques for Remote Sensing II
Author: Adam D. Devir
Publisher: SPIE-International Society for Optical Engineering
Total Pages: 326
Release: 1998
Genre: Science
ISBN:
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This text brings together 34 papers, examining subjects such as characterization of of the propagation environment and sensors, propagation and imaging through inhomogenous dense media, and propagation and imaging through optical turbulence.