Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An Investigation of Infrared Radiative Properties of Cirrus Clouds
Author: An Investigation of Infrared Radiative Properties of Cirrus Clouds
Author: Wenbo SunPublisher:
ISBN:
Category : Cloud physics
Languages : en
Pages : 0
Book Description
Infrared Radiative Properties of Tropical Cirrus Clouds Inferred from Broadband Measurements
Author: Keith Thomas GriffithPublisher:
ISBN:
Category : Cirrus
Languages : en
Pages : 102
Book Description
A Case Study of Cirrus Cloud Radiative Properties in the Mid and Far Infrared
Author: The Study of Cirrus Clouds Using Airborne and Satellite Data
Author: Kerry Glynne MeyerPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Cirrus clouds are known to play a key role in the earth's radiation budget, yet are one of the most uncertain components of the earth-atmosphere system. With the development of instruments such as the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and the Moderate-resolution Infrared Spectroradiometer (MODIS), scientists now have an unprecedented ability to study cirrus clouds. To aid in the understanding of such clouds, a significant study of cirrus radiative properties has been undertaken. This research is composed of three parts: 1) the retrieval of tropical cirrus optical thickness using MODIS level-1b calibrated radiance data, 2) a survey of tropical cirrus cloud cover, including seasonal variations, using MODIS level-3 global daily gridded data, and 3) the simultaneous retrieval of cirrus optical thickness and ice crystal effective diameter using AVIRIS reflectance measurements.
Cirrus
Author: David K. LynchPublisher: Oxford University Press, USA
ISBN: 0195130723
Category : Cirrus clouds
Languages : en
Pages : 499
Book Description
This text, devoted entirely to cirrus clouds, captures the state of knowledge of cirrus clouds and serves as a practical handbook as well.
˜Theœ effects of small ice crystals on the infrared radiative properties of cirrus clouds
Author: Cirrus Cloud Radiative Properties in the Thermal Infrared
Author: Richard John BantgesInvestigation on Cirrus Clouds by the Cloud-aerosol Lidar and Infrared Pathfinder Satellite Observation Data
Author: Jiang ZhuPublisher:
ISBN:
Category : Cirrus clouds
Languages : en
Pages : 406
Book Description
Understanding and describing the role of clouds in the climate system need intensive and extensive research on cloud properties. The albedo and greenhouse effects of clouds and their relations with the physical properties of clouds are analyzed. Cloud-top height and ice water content are key factors in impacting the longwave and shortwave radiation, respectively. Lidar and infrared radiometer measurement technologies are introduced. Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) level I Lidar profile, level 2 cloud layer, and level 2 Lidar/IIR track products are briefly reviewed. The algorithms for identification of cirrus clouds, Linear Depolarization Ratio (LDR), and effective diameter are presented. An average LDR profile is calculated by using the sum of total attenuated backscattering profiles and the sum of perpendicular attenuated backscattering profiles. A weight-average method is applied to calculate the average LDR. A split-window method is applied to estimate the effective diameters of clouds. A set of bulk ice crystal models and a radiative transfer model are applied to produce a look-up table that includes the radiative transfer simulation results. The macro-physical properties of cirrus clouds are analyzed. The frequency of occurrence of cirrus clouds varies with latitude, and strongly relates to the atmospheric circulation. Cirrus clouds are few in high-pressure zones and abundant where seasonal monsoonal circulation occurs. Cloud-top height decreases with increasing latitude. Cloud-top temperature is lower in the tropical regions than in the midlatutude and the polar regions. The measured cloud thickness shows a great diurnal variation. CALIPSO lidar detects more cirrus clouds than satellite-based passive measurement. LDR values of cirrus clouds vary with latitude and location, and are higher during nighttime than during daytime. The 0.32 and 0.37 annual average LDRs derived by nadir and off-nadir measurements, respectively, indicate that substantial amounts of horizontal orientated ice crystals exist in cirrus clouds. The global distribution of effective diameter of cirrus clouds varies with latitude and season, and the effective diameter has relationship with the LDR.
Optical Properties of Cirrus Clouds from Satellite Imagery and Radiative Transfer Calculations
Author: Robert S. StonePublisher:
ISBN:
Category : Cloud physics
Languages : en
Pages : 113
Book Description
In this study, differences between narrowband near infrared (NIR) and infrared (IR) brightness temperatures are related to cloud optical depth providing a theoretical basis for determining cirrus optical properties from combined satellite images.