EOS Validation Program

Institution: University of Hawaii
Phone: (808) 956-6483
E-mail: augustin@srrb.noaa.gov

Antony Clarke, University of Hawaii

October 2001
Final Report, December 2002

We propose to carry out aircraft radiation and aerosol size distribution measurements over the Hawaii MOBY buoy and the HOT (Hawaii Ocean Time-Series) site. Radiation measurements will also be collected from the Moana Wave R/V which services these sites and from a new surface radiation site which we are developing at Makapu'u on the south east corner of Oahu. The goal of the aircraft measurements is to test/validate 1 ) atmospheric correction terms being applied in deriving ocean color from satellite, and 2) calculations of radiative fluxes at the surface up through the trade wind inversion (i.e. cloud, aerosol and water vapor effects). Our goal is to obtain a two and a half year time series of radiation measurements by flying over the Moby and HOT sites on a monthly basis. The aircraft measurements include upwelling and downwelling irradiance (both broad band and spectral), spectral radiance (both fixed angle and scanned over surface and sky angles), aerosol optical depth, CCD imaging (above and below), temperature, relative humidity, pressure, and aircraft position and attitude information (GPS survey-differential system). On selected flights, aerosol size distributions will be measured from 0.03 to 20 mm diameter.These ship based measurements include downwelling fluxes (both visible and IR).In addition we will obtain a suite of radiation measurements from the Moana Wave WV as it services the MOBY and HOT sites. infrared), aerosol optical depths. camera derived cloud cover, wind speed and direction, and rainfall. Continuous surface measurements at Makapu'u include solar downwelling flux using an Eppley pyranometer, and a Yankee shadowband, IR downwelling flux , and aerosol optical depth.