A5054126566- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Water Quality Monitoring and Analysis
- Calibration and Measurement Techniques
- Air Quality Monitoring and Forecasting
- Marine Bivalve and Aquaculture Studies
- Aeolian processes and effects
- Particle Dynamics in Fluid Flows
- Underwater Vehicles and Communication Systems
- Geophysics and Gravity Measurements
- Spacecraft Design and Technology
- Marine Biology and Ecology Research
- Cyclone Separators and Fluid Dynamics
- Meteorological Phenomena and Simulations
- Underwater Acoustics Research
- Adaptive optics and wavefront sensing
- Marine and Offshore Engineering Studies
- Biocrusts and Microbial Ecology
- Planetary Science and Exploration
- Aquatic Ecosystems and Phytoplankton Dynamics
- Aerosol Filtration and Electrostatic Precipitation
Analytical Services & Materials (United States)
2002-2006
Science Applications International Corporation (United States)
2006
Langley Research Center
2006
Naval Research Laboratory Information Technology Division
2006
Trent University
2004
Virginia Tech
2001
Old Dominion University
1981
Eppley's precision spectral pyranometer (PSP) is used in networks around the world to measure downwelling diffuse and global solar irradiance at surface of Earth. In recent years several studies have shown significant discrepancy between irradiances measured by pyranometers those computed atmospheric radiative transfer models. Pyranometer measurements been questioned because observed sometimes are below theoretical minimum values for a pure molecular atmosphere, night instruments often...
Abstract NASA developed an Earth Observing System (EOS) to study global change and reduce uncertainties associated with aerosols other key parameters controlling climate. The first EOS satellite, Terra, was launched in December 1999. Chesapeake Lighthouse Aircraft Measurements for Satellites (CLAMS) field campaign conducted from 10 July 2 August 2001 validate several Terra data products, including aerosol properties radiative flux profiles derived three complementary instruments: the Clouds...
When radiometers on satellites point toward Earth with the goal of sensing an important variable quantitatively, rather than just creating a pleasing image, task at hand is often not simple. The electromagnetic energy detected by puzzle various signals; it must be solved to quantify specific physical variable. This task, called retrieval or remote-sensing process, most satellite-based observation programs. It would ideal test algorithms for processes in sealed laboratory, where all relevant...
The shortwave broadband albedo at the top of a molecular atmosphere over ocean between 40°N and 40°S is estimated using radiance measurements from Clouds Earth's Radiant Energy System (CERES) instrument Visible Infrared Scanner (VIRS) aboard Tropical Rainfall Measuring Mission satellite. monotonically increases 0.059 solar zenith angle 10° to 0.107 60°. uncertainty in 3.5 × 10 −3 caused by CERES‐derived irradiances, VIRS‐derived aerosol optical thicknesses, variations surface wind speed...
A long-term surface-based measurement program has been established at an oceanic site to validate new products being derived globally as part of NASA's Earth Observing System for global change studies. This unique site, located the Chesapeake Lighthouse in Atlantic Ocean is completely surrounded by water offering a uniform background with well-known physical properties ideal validating space-based retrievals climatologically important parameters such radiative fluxes and aerosol properties....
Tropospheric aerosols are believed to play an important role in modulating the Earth's energy budget. Direct aerosol effects include scattering and absorption of solar radiation: there is less (but still significant) scattering, absorption, emission thermal infrared. In part, because vary widely space, time, composition, their radiative forcings have not been quantified with accuracy sufficient allow a much- needed assessment effect on global climate. Recent advances space-based sensor...
In order to verify the COVE (CERES Ocean Validation Experiment) platform measurements and characterize ocean optical properties, airborne of spectral broadband shortwave upwelling downwelling radiative fluxes were made onboard NASA Langley OV-10 aircraft between July, 2001 March, 2003. The processed data derived albedos are compared with other observed model simulation results, comparisons show consistently good agreement.