Airborne, in Situ and Laboratory Measurements of the Optical and Photochemical Properties of Surface Marine Waters
MARYLAND UNIV COLLEGE PARK DEPT OF CHEMISTRY AND BIOCHEMISTRY
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The principal long-term objectives of this work are 1 to uncover and quantify the primary factors controlling the spatial and temporal distributions of the light-absorbing colored constituents of dissolved organic matter CDOM in marine and estuarine waters, 2 to determine the impact of CDOM on the aquatic light field and remotely-sensed optical signals, 3 to examine the effects of photooxidation on the optical absorption and emission properties of this material, as well as the relationship between the loss of absorption and fluorescence by photooxidation and the yield of photochemical intermediates and products, 4 to develop and apply new techniques for determining the photoproduction rates of transient intermediates in natural waters. A combination of field and laboratory measurements are being employed to estimate the wavelength dependence of the rates of the photobleaching response and its relationship to organic carbon photooxidation and the production of photochemical intermediates in order to better understand the impact of photooxidation on marine carbon and trace element cycles and the optical properties of seawater.
- Radiation and Nuclear Chemistry
- Hydrology, Limnology and Potamology