Aerosol Optical Depth Analysis With Noaa Goes And Poes In The Western Atlantic
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Aerosol Optical Depth Analysis With Noaa Goes And Poes In The Western Atlantic
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Author : Arunas P. Kuciauskas
language : en
Publisher:
Release Date : 2002-06-01
Aerosol Optical Depth Analysis With Noaa Goes And Poes In The Western Atlantic written by Arunas P. Kuciauskas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-06-01 with categories.
An aerosol optical depth retrieval algorithm in the visible wavelengths for the NOAA POES AVHRR and GOES-8 visible imager is presented for the cloud free, marine atmosphere. The algorithm combines linearized single- scatter theory with an estimate of surface reflectance. Phase functions are parameterized using an aerosol size distribution model and the ratio of radiance values measured in channels 1 and 2 of the AVHRR. Retrieved satellite aerosol optical depth (AOD) is compared to three land-based sun photometer stations located on islands in the western Atlantic during July and September, 2001. GOES-8 channel 1 (visible wavelength) radiance values were initially calibrated using techniques developed by Rao. Additional connections to the channel 1 GOES- 8 radiances were made by applying a linear offset factor obtained during the experimental time period through comparison with AVHRR radiances. The results for the GOES -derived AOD compare favorably to the AERONET-measured AOD values. For both NOAA and GOES data, the comparison dataset has a correlation coefficient of 0.67 with a standard error of 0.07. For higher AOD cases (d = 0. 25), the general trend was for the satellite-derived AOD values to underestimate AERONET-observed conditions. During these higher conditions, the scattering phase function pattern contained within the algorithm deviated from the expected pattern, especially between 1400 1800. Overall, the more accurate calculations of AOD occurred over scatter angles between 140 deg - 150 deg and 170 deg - 180 deg.
Aerosol Optical Depth Analysis With Noaa Goes And Poes In The Western Atlantic
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Author :
language : en
Publisher:
Release Date : 2006
Aerosol Optical Depth Analysis With Noaa Goes And Poes In The Western Atlantic written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
An aerosol optical depth retrieval algorithm in the visible wavelengths for the NOAA POES AVHRR and GOES-8 visible imager is presented for the cloud free, marine atmosphere. The algorithm combines linearized single-scatter theory with an estimate of surface reflectance. Phase functions are parameterized using an aerosol size distribution model and the ratio of radiance values measured in channels 1 and 2 of the AVHRR. Retrieved satellite aerosol optical depth (AOD) is compared to three land-based sun photometer stations located on islands in the western Atlantic during July and September, 2001. GOES-8 channel 1 (visible wavelength) radiance values were initially calibrated using techniques developed by Rao and Zhang (1999). Additional corrections to the channel 1 GOES-8 radiances were made by applying a linear offset factor obtained during the experimental time period through comparison with AVHRR radiances. The results for the GOES-derived AOD compare favorably to the Aerosol Robotic NETwork (AERONET) AOD values. For both NOAA and GOES data, the comparison dataset has a correlation coefficient of 0.67 with a standard error of 0.7. During dusty conditions with corresponding higher AOD levels greater than or equal to 0.25, the general trend was for the satellite-derived AOD values to underestimate AERONET AOD values. Within these conditions, the scattering phase function pattern deviated from the expected pattern, especially between the scattering angles of 140 degrees to 180 degrees. Overall, the more accurate calculations of AOD occurred over scatter angles between 140 degrees to 150 degrees and 170 degrees to 180 degrees.
Remote Measurement Of Aerosol Optical Properties Using The Noaa Poes Avhrr And Goes Imager During Tarfox
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Author : Brian B. Brown
language : en
Publisher:
Release Date : 1997-06-01
Remote Measurement Of Aerosol Optical Properties Using The Noaa Poes Avhrr And Goes Imager During Tarfox written by Brian B. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-06-01 with categories.
A radiative transfer algorithm in the solar wavelengths for the NOAA POES AVHRR and GOES Imager is proposed for the cloud-free, marine atmosphere. The algorithm combines linearized, single-scattering theory with an estimate of bi-directional surface reflectance. Phase functions are parameterized using an aerosol distribution model and the ratio of radiance values measured in channels 1 and 2 of the AVHRR. Retrieved satellite aerosol optical depth is compared to airborne sunphotometer data and derived values from particle size distributions collected during the Tropospheric Aerosol Radiative Forcing Observational Experiment (TARFOX) in July 1996. Error in the satellite derived values from the AVHRR originates in error in modeling aerosol size distributions, corresponding phase function parameterization and treatment of specular surface reflectance. Extension of the algorithm to the GOES Imager provided results consistent with the AVHRR.
Characterizing The Spatial And Temporal Distribution Of Aerosol Optical Thickness Over The Atlantic Basin Utilizing Goes 8 Multispectral Data
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-05-29
Characterizing The Spatial And Temporal Distribution Of Aerosol Optical Thickness Over The Atlantic Basin Utilizing Goes 8 Multispectral Data written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-29 with categories.
In recent years, modeling and analysis efforts have suggested that the direct and indirect radiative effects of both anthropogenic and natural aerosols play a major role in the radiative balance of the earth and are an important factor in climate change calculations. The direct effects of aerosols on radiation and indirect effects on cloud properties are not well understood at this time. In order to improve the characterization of aerosols within climate models it is important to accurately parameterize aerosol forcing mechanisms at the local, regional, and global scales. This includes gaining information on the spatial and temporal distribution of aerosols, transport regimes and mechanisms, aerosol optical thickness, and size distributions. Although there is an expanding global network of ground measurements of aerosol optical thickness and size distribution at specific locations, satellite data must be utilized to characterize the spatial and temporal extent of aerosols and transport regimes on regional and global scales. This study was part of a collaborative effort to characterize aerosol radiative forcing over the Atlantic basin associated with the following three major aerosol components in this region: urban/sulfate, Saharan dust, and biomass burning. In-situ ground measurements obtained by a network of sun photometers during the Smoke Clouds and Radiation Experiment in Brazil (SCAR-B) and the Tropospheric Aerosol Radiative Forcing Observational Experiment (TARFOX) were utilized to develop, calibrate, and validate a Geostationary Operational Environmental Satellite (GOES)-8 aerosol optical thickness (AOT) product. Regional implementation of the GOES-8 AOT product was used to augment point source measurements to gain a better understanding of the spatial and temporal distributions of Atlantic basin aerosols during SCAR-B and TARFOX.Fox, Robert and Prins, Elaine Mae and Feltz, Joleen M.Goddard Space Flight CenterSIZE DISTRIBUTION; SPATIAL DISTRIBUTION; AEROSOLS
Remote Measurement Of Aerosol Optical Properties Using The Noaa Poes Avhrr During Ace 1 Tarfox And Ace 2
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Author : Peter J. Smith
language : en
Publisher:
Release Date : 1998-12-01
Remote Measurement Of Aerosol Optical Properties Using The Noaa Poes Avhrr During Ace 1 Tarfox And Ace 2 written by Peter J. Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-12-01 with categories.
A radiative transfer algorithm in the solar wavelengths for the NOAA POES AVHRR is presented for the cloud-free, marine atmosphere. This algorithm combines linearized, single-scattering theory with an estimate of bi-directional surface reflectance. Phase functions are parameterized using an aerosol distribution model and the ratio of radiance values measured in channels 1 and 2 of the AVHRR. Automated cloud screening and sun glint removal is included. Retrieved satellite aerosol optical depth (AOD) is compared to surface measured sunphotometer AOD collected during the International Global Atmospheric Chemistry (IGAC) Project's Second Aerosol Characterization Experiment (ACE-2) from June 16 to July 25, 1997. The comparison data set has a correlation coefficient of 0.88 with a standard error of 0.02 at both channel 1 and 2 wavelengths. Regional aerosol properties are examined with an emphasis on the differences between the ACE-1, TARFOX and ACE-2 regions. ACE-1 and ACE-2 regions have strong modes at AOD at around 0.1, but ACE-2 tails toward higher values consistent with urban and dust aerosol intrusion. The TARFOX region has a noticeable mode at AOD around 0.2, but has significant spread of AOD values consistent with the varied aerosol constituents in that area.
Retrieval Of Aerosol Optical Depth From Noaa Avhrr
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Author : Adrian Berthold Hauser
language : en
Publisher:
Release Date : 2004
Retrieval Of Aerosol Optical Depth From Noaa Avhrr written by Adrian Berthold Hauser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Aerosol Optical Depth Retrieval By Nps Model Modified For Seawifs Input
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Author : Brady A. Brown
language : en
Publisher:
Release Date : 2002-03-01
Aerosol Optical Depth Retrieval By Nps Model Modified For Seawifs Input written by Brady A. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-03-01 with categories.
Using visible wavelength radiance data obtained from the spaceborne Sea-viewing Wide Field of-view Sensor (SeaWiFS), during the Aerosol Characterization Experiment-Asia (ACE-Asia), an analysis of aerosol optical depth (AOD) was completed by modification to the NPS AOD Model previously compiled for NOAA geosynchronous- and polar-orbiting satellites. The objective of the analysis was to calibrate the linearized, single-scatter algorithm, estimated bi-directional surface reflectance, and phase function parameters. The intent of the study was to provide enhanced temporal AOD coverage with the addition of the orbiting SeaWiFS eight-channel radiometer to the established NOAA constellation of five-channel AVHRR-equipped satellites. The work has operational significance in providing timely, accurate remote information to military operators of identification and targeting systems. Possible applications include detection and warning of international treaty violation of reducing the adverse public health effects by weapons of mass destruction of pollution advection on global weather patterns.
Toward A 20 Year Climatology Of Aerosol Optical Depth Derived From Noaa Avhrr Over Central Europe
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Author : Michael Riffler
language : en
Publisher:
Release Date : 2010
Toward A 20 Year Climatology Of Aerosol Optical Depth Derived From Noaa Avhrr Over Central Europe written by Michael Riffler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Biographical Information On John M D Young
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Author :
language : en
Publisher:
Release Date :
Biographical Information On John M D Young written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Observation Of The Earth And Its Environment
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Author : Herbert J. Kramer
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Observation Of The Earth And Its Environment written by Herbert J. Kramer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Science categories.
The following listing represents a survey and a short description of 'Earth Observing Mis sions' in alphabetical order. The listing in Part A considers completed-, operational-as well as planned missions on an international scale (Earth observations from space know no na tional boundaries). A look into past activities is important for reasons of heritage, context and of perspective. The document is intended for all who want to keep track of missions and sensors in the fast -growing field of Earth observations. There cannot be any claim to com pleteness, although a considerable effort was made to collect and integrate all known mis sions and sensors into this book. Earth observation by remote sensing changes our view and perception of the world. We be gin to realize the global character of remote sensing, its multidimensional and complemen tary nature, its vast potential to many disciplines, its importance to mankind as a whole. Re mote sensing permits for the first time in history a total system view of the Earth. The view from space toward Earth has brought about sweeping revisions in the Earth sciences, in par ticular in such fields as meteorology, oceanology, hydrology, geology, geography, forestry, agriculture, geodynamics, solar-terrestrial interactions, and many others.