Journal of the Atmospheric Sciences: Recent submissions
Now showing items 4981-5000 of 13215
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Reconstruction of the Scattering Coefficient in the Lower Troposphere Using Ground-Based Measurements
(American Meteorological Society, 2002)The model proposed provides for reconstruction of the aerosol scattering coefficient profile. In so doing, one needs as input data the scattering coefficient value of the dry aerosol substance at the near-ground level ... -
Wavelength Dependence of the Absorption of Black Carbon Particles: Predictions and Results from the TARFOX Experiment and Implications for the Aerosol Single Scattering Albedo
(American Meteorological Society, 2002)Measurements are presented of the wavelength dependence of the aerosol absorption coefficient taken during the Tropical Aerosol Radiative Forcing Observational Experiment (TARFOX) over the northern Atlantic. The data show ... -
Variability of Absorption and Optical Properties of Key Aerosol Types Observed in Worldwide Locations
(American Meteorological Society, 2002)Aerosol radiative forcing is a critical, though variable and uncertain, component of the global climate. Yet climate models rely on sparse information of the aerosol optical properties. In situ measurements, though important ... -
Remote Sensing of Atmospheric Aerosols and Trace Gases by Means of Multifilter Rotating Shadowband Radiometer. Part I: Retrieval Algorithm
(American Meteorological Society, 2002)A retrieval algorithm for processing multifilter rotating shadowband radiometer (MFRSR) data from clear and partially cloudy days is described and validated. This method, while complementary to the Langley approach, uses ... -
Optical Properties of Atmospheric Aerosol in Maritime Environments
(American Meteorological Society, 2002)Systematic characterization of aerosol over the oceans is needed to understand the aerosol effect on climate and on transport of pollutants between continents. Reported are the results of a comprehensive optical and physical ... -
A Comparison of Model- and Satellite-Derived Aerosol Optical Depth and Reflectivity
(American Meteorological Society, 2002)The determination of an accurate quantitative understanding of the role of tropospheric aerosols in the earth's radiation budget is extremely important because forcing by anthropogenic aerosols presently represents one of ... -
Impact of Future Climate and Emission Changes on Stratospheric Aerosols and Ozone
(American Meteorological Society, 2002)Global climatological distributions of key aerosol quantities (extinction, optical depth, mass, and surface area density) are shown in comparison with results from a three-dimensional global model including stratospheric ... -
Tropospheric Aerosol Optical Thickness from the GOCART Model and Comparisons with Satellite and Sun Photometer Measurements
(American Meteorological Society, 2002)The Georgia Institute of Technology?Goddard Global Ozone Chemistry Aerosol Radiation and Transport (GOCART) model is used to simulate the aerosol optical thickness τ for major types of tropospheric aerosols including ... -
Spatial Inhomogeneities and the Spectral Behavior of Atmospheric Aerosol Optical Depth over the Atlantic Ocean
(American Meteorological Society, 2002)In this paper the results of investigations into atmospheric aerosol optical depth (AOD) over the Atlantic Ocean are discussed. The data were collected during five shipboard expeditions that took place between 1989 and ... -
Case Studies of Aerosol Retrievals over the Ocean from Multiangle, Multispectral Photopolarimetric Remote Sensing Data
(American Meteorological Society, 2002)To evaluate the global effects of aerosols on the direct radiative balance, tropospheric chemistry, and cloud properties of the earth's atmosphere requires high-precision remote sensing that is sensitive to the aerosol ... -
Aerosol Retrievals from Individual AVHRR Channels. Part II: Quality Control, Probability Distribution Functions, Information Content, and Consistency Checks of Retrievals
(American Meteorological Society, 2002)This second part of a two-part study evaluates retrievals of aerosol optical depths, τ1 and τ2, in Advanced Very High Resolution Radiometer (AVHRR) channels 1 and 2 centered at ?1 = 0.63 and ?2 = 0.83 ?m, and an effective ... -
Aerosol Retrievals from Individual AVHRR Channels. Part I: Retrieval Algorithm and Transition from Dave to 6S Radiative Transfer Model
(American Meteorological Society, 2002)The present second-generation aerosol retrieval algorithm over oceans used at NOAA/National Environmental Satellite, Data, and Information Service (NESDIS) separately retrieves two values of aerosol optical depth, τ1 and ... -
A Pacific Aerosol Survey. Part I: A Decade of Data on Particle Production, Transport, Evolution, and Mixing in the Troposphere
(American Meteorological Society, 2002)Integration of extensive aerosol data collected during the past decade around the Pacific basin provides a preliminary assessment of aerosol microphysics for this region and cycling of aerosol in the troposphere. These ... -
A Long-Term Record of Aerosol Optical Depth from TOMS Observations and Comparison to AERONET Measurements
(American Meteorological Society, 2002)Observations of backscattered near-ultraviolet radiation from the Total Ozone Mapping Spectrometer (TOMS) on board the Nimbus-7 (1979?92) and the Earth Probe (mid-1996 to present) satellites have been used to derive a ... -
Evaluating the Potential for Retrieving Aerosol Optical Depth over Land from AVHRR Pathfinder Atmosphere Data
(American Meteorological Society, 2002)In spite of numerous studies on the remote sensing of aerosols from satellites, the magnitude of aerosol climate forcing remains uncertain. However, data from the Advanced Very High Resolution Radiometer (AVHRR) ... -
Coalescence Efficiency Measurements for Minimally Charged Cloud Drops
(American Meteorological Society, 2002)Laboratory measurements were made of the collision cross section for water drops freely falling in air to evaluate coalescence efficiencies for cloud drops of 55?105-?m radius in a radius ratio range of 0.5?1.0. The charge ... -
A Three-Dimensional Coupled Chemistry–Climate Model Simulation of Past Stratospheric Trends
(American Meteorological Society, 2002)A coupled chemistry?climate model is integrated for the period March 1979?January 2000 with sea surface temperatures and sea ice amounts specified from observations. Greenhouse gas concentrations and halogen loading are ... -
Global Aerosol Climatology Project
(American Meteorological Society, 2002) -
Retrieval of Optical Depth for Heavy Smoke Aerosol Plumes: Uncertainties and Sensitivities to the Optical Properties
(American Meteorological Society, 2002)This paper is concerned with uncertainties in the Advanced Very High Resolution Radiometer (AVHRR)-based retrieval of optical depth for heavy smoke aerosol plumes generated from forest fires that occurred in Canada due to ... -
Global Two-Channel AVHRR Retrievals of Aerosol Properties over the Ocean for the Period of NOAA-9 Observations and Preliminary Retrievals Using NOAA-7 and NOAA-11 Data
(American Meteorological Society, 2002)Described is an improved algorithm that uses channel 1 and 2 radiances of the Advanced Very High Resolution Radiometer (AVHRR) to retrieve the aerosol optical thickness and Ångström exponent over the ocean. Specifically ...