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UV - VIRGIN ISLANDS NATIONAL PARK
Citation:
Description:
Brewer 144 is located in Virgin Islands NP, measuring ultraviolet solar radiation. Irradiance and column ozone are derived from this data. Ultraviolet solar radiation is measured with a Brewer Mark IV, single-monochrometer, spectrophotometer manufactured by SCI-TEC Instruments, Inc. of Saskatoon, SK, Canada. The UV monitoring under EPA's UV-Net program is coordinated with measurement programs of other U.S. Federal agencies through the U.S. Global Change Research Program. Brewer 144 is located on the top a modular building about 3.5 meters high on Lind Point on the northwest side of the island of St. John, U.S. V.I. The Brewer is 60 m above sea level. A Meteorological tower about 10 meters high is attached to the east side of the building. To the northeast is a 6-meter USGS tower. Just to the west of the Brewer is another 10-meter tower holding air sampling equipment, and attached to the west side of the building is a 6-meter tower with a nephelometer on the top. All of these towers obstruct the view of the sky to some extent. There is a nearby tree to the SSE and to the east is a large hill. The ocean is seen from the north, through the west, to the south. The Brewer has been recording data at this site since May 1998.