Ultraviolet Radiation and Bio-optics in Crater Lake, Oregon, 2005
METHODS
Crater Lake data archives
The Long Term Limnological Monitoring Program database maintained by the Crater Lake National Park staff was the source for Secchi depth, photometer profiles, weather data, LICOR radiometer profiles, chlorophyll-a data, and CTD profiles with beam transmissometer and fluorometer data (Larson et al., 1996a). The longest record is for Secchi depths; these data were screened to meet specific criteria, and with the exception of the first record (the white dinner plate lowered by Diller in 1896, Diller 1897), all ZSD data represent 20 cm disk data recorded during non-stormy weather with good visibility through the water surface.
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