Chemistry Reference
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Fig. 5. Top left:
Laser-induced Raman backscatter (381 nm) and two fluorescence
return signals (414, 482 nm) measured during an overflight over an oleyl alcohol
slick and adjacent
clean
sea areas;
bottom left:
the simultaneously obtained pas-
sive microwave L-band data;
top right:
same lidar sensor, Raman backscatter
(381 nm) and fluorescence return signal at 500 nm during an overflight over a
Murban crude oil spill and adjacent
clean
sea areas;
bottom right:
same passive
microwave sensor, over an artificial oil spill in the New York Bight.
With regard to the Lidar measurements, the presence of an OLA slick at
the ocean surface caused a decrease in both the Raman backscatter at 381
nm and of the fluorescent bands at 414 and 482 nm, while in the presence
of a thick crude oil spill the Raman depression at 381 nm was accompa-
nied by a simultaneous increase in the longer wavelength bands. During
the same overflights a dramatic decrease in the passive microwave L-band
signals was observed in the presence of an OLA slick (Blume et al. 1983),
while in the presence of a crude oil spill an increase in the same band is
encountered. Unfortunately, a verification of the latter conclusions is still
