Index Catalog // ScholarsArchive@OSU

Inference of Marine Stratus Cloud Optical Depths from Satellite Measurements: Does 1D Theory Apply?

Creator:: Loeb, Norman G. and Coakley, J. A., Jr.
Abstract:: The validity of plane-parallel (1D) radiative transfer theory for cloudy atmospheres is examined by directly comparing calculated and observed visible reflectances for one month of Global Area Coverage Advanced Very High Resolution Radiometer satellite observations of marine stratus cloud layers off the coasts of California, Peru, and Angola. Marine stratus...
Resource Type:: Article
Full Text:: Measurements: Does 1D Theory Apply? NORMAN G. LOEB* AND J. A. COAKLEY JR. College of Oceanic and Atmospheric

Satellite Estimates and Shipboard Observations of Downward Radiative Fluxes at the Ocean Surface

Creator:: Guo, G. and Coakley, J. A., Jr.
Abstract:: Clouds and the Earth’s Radiant Energy System (CERES) uses a suite of instruments on the Terra and Aqua satellites combined with analyzed weather data and information on surface conditions to estimate surface radiative fluxes. CERES estimates for the Terra satellite were compared with measurements of the surface radiative fluxes collected...
Resource Type:: Article
Full Text:: Radiative Fluxes at the Ocean Surface G. GUO* AND J. A. COAKLEY JR. College of Oceanic and Atmospheric

Relationships between Marine Stratus Cloud Optical Depth and Temperature: Inferences from AVHRR Observations

Creator:: Chang, Fu-Lung and Coakley, James A., Jr.
Abstract:: Studies using International Satellite Cloud Climatology Project (ISCCP) data have reported decreases in cloud optical depth with increasing temperature, thereby suggesting a positive feedback in cloud optical depth as climate warms. The negative cloud optical depth and temperature relationships are questioned because ISCCP employs threshold assumptions to identify cloudy pixels...
Resource Type:: Article
Full Text:: , Virginia JAMES A. COAKLEY JR. College of Oceanic and Atmospheric Sciences, Oregon State University

Aerosol optical depth and direct radiative forcing for INDOEX derived from AVHRR: Observations, January–March 1996–2000

Creator:: Tahnk, William R. and Coakley, James A., Jr.
Abstract:: Visible and near infrared reflectances from NOAA-14 Advanced Very High Resolution Radiometer (AVHRR) daytime passes are used to derive optical depths at 0.55 μm, an index of aerosol type, continental or marine, and the direct effect of the aerosol on the top of the atmosphere and surface solar radiative fluxes...
Resource Type:: Article
Full Text:: . Coakley Jr. College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, USA

Improved Calibration Coefficients for NOAA-12 and NOAA-15 AVHRR Visible and Near-IR Channels

Creator:: Tahnk, William R. and Coakley, James A. Jr.
Abstract:: A time history of the calibration coefficients for channels 1 and 2 of the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-12 and NOAA-15 spacecraft is presented. The history is based on reflectances observed for the interior zones of the Antarctic and Greenland ice sheets previously obtained with the...
Resource Type:: Article
Full Text:: calibration for ISCCP. J. Atmos. Oceanic Technol., 14, 1091–1109. Coakley, J. A., Jr., W. R. Tahnk, C. Devaux

Limits to the Aerosol Indirect Radiative Effect Derived from Observations of Ship Tracks

Creator:: Coakley, James A., Jr. and Walsh, Christopher D.
Abstract:: One-kilometer Advanced Very High Resolution Radiometer (AVHRR) observations of the effects of ships on low-level clouds off the west coast of the United States are used to derive limits for the degree to which clouds might be altered by increases in anthropogenic aerosols. As ships pass beneath low-level clouds, particles...
Resource Type:: Article
Full Text:: Indirect Radiative Effect Derived from Observations of Ship Tracks JAMES A. COAKLEY JR. AND CHRISTOPHER D

Biases in Earth radiation budget observations, Part II: Consistent scene identification and anisotropic factors

Creator:: Ye, Qian and Coakley, James A., Jr.
Abstract:: Simple threshold scene identification methods are developed to reduce the effects of errors in scene identifications on the anisotropy of reflected and emitted radiances inferred from Earth Radiation Budget Experiment (ERBE) scanner observations. The ERBE maximum likelihood estimate (MLE) scene identification is assumed to be accurate for nadir fields of...
Resource Type:: Article
Full Text:: identification and anisotropic factors Qian Ye • and James A. Coakley Jr. College of Oceanic and Atmospheric

Comparison of Ceilometer, Satellite, and Synoptic Measurements of Boundary-Layer Cloudiness and the ECMWF Diagnostic Cloud Parameterization Scheme during ASTEX

Creator:: Bretherton, Christopher S., Klinker, E., Betts, A. K., and Coakley, J. A., Jr.
Abstract:: Cloud fraction is a widely used parameter for estimating the effects of boundary-layer cloud on radiative transfer. During the Atlantic Stratocumulus Transition Experiment (ASTEX) during June 1992, ceilometer and satellite-based measurements of boundary-layer cloud fraction were made in the subtropical North Atlantic, a region typified by a 1–2 km deep...
Resource Type:: Article

Relationships among properties of marine stratocumulus derived from collocated CALIPSO and MODIS observations

Creator:: Hayes, C. R., Coakley, J. A. Jr., and Tahnk, W. R.
Abstract:: Collocated Moderate Resolution Imaging Spectroradiometer (MODIS) imagery and Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) 532 nm total attenuated backscatter coefficients were used to identify 50 km scale segments for ocean regions that had only a single layer of marine stratocumulus. On the basis of whether the underlying ocean...
Resource Type:: Article
Full Text:: . Hayes,1 J. A. Coakley Jr.,1 and W. R. Tahnk1 Received 12 March 2009; revised 18 September 2009

Effects of Additional Particles on Already Polluted Marine Stratus

Creator:: Sechrist, B., Coakley, J. A., Jr., and Tahnk, W. R.
Abstract:: The response of already polluted marine stratocumulus to additional particles was examined by studying the clouds where two ship tracks cross. Nearly 100 such crossings were collected and analyzed using Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) multispectral imagery for the daytime passes off the western coast of the...
Resource Type:: Article
Full Text:: Polluted Marine Stratus B. SECHRIST, J. A. COAKLEY JR., AND W. R. TAHNK College of Oceanic and

ScholarsArchive@OSU

Inference of Marine Stratus Cloud Optical Depths from Satellite Measurements: Does 1D Theory Apply?

Satellite Estimates and Shipboard Observations of Downward Radiative Fluxes at the Ocean Surface

Relationships between Marine Stratus Cloud Optical Depth and Temperature: Inferences from AVHRR Observations

Aerosol optical depth and direct radiative forcing for INDOEX derived from AVHRR: Observations, January–March 1996–2000

Improved Calibration Coefficients for NOAA-12 and NOAA-15 AVHRR Visible and Near-IR Channels

Limits to the Aerosol Indirect Radiative Effect Derived from Observations of Ship Tracks

Biases in Earth radiation budget observations, Part II: Consistent scene identification and anisotropic factors

Comparison of Ceilometer, Satellite, and Synoptic Measurements of Boundary-Layer Cloudiness and the ECMWF Diagnostic Cloud Parameterization Scheme during ASTEX

Relationships among properties of marine stratocumulus derived from collocated CALIPSO and MODIS observations

Effects of Additional Particles on Already Polluted Marine Stratus

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