A submersible radiometer for measuring solar UV irradiance over a wide dynamic range

John H. Morrow; Thomas P. Comer; Randall N. Lind; James Robertson; Charles R. Booth

doi:10.1117/12.466237

1 July 2003 A submersible radiometer for measuring solar UV irradiance over a wide dynamic range

John H. Morrow, Thomas P. Comer, Randall N. Lind, James Robertson, Charles R. Booth

Proceedings Volume 4896, Ultraviolet Ground- and Space-based Measurements, Models, and Effects II; (2003) https://doi.org/10.1117/12.466237
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

The potential for increased ultraviolet (UV) exposure resulting from ozone depletion has helped fuel interest in acquiring accurate in-water measurements of UV irradiance. In the water column, the flux in the UV becomes a vanishingly small signal that must be measured in the presence of a much larger visible component. In addition, the flux of UV in natural waters may be influenced greatly by changes in solar elevation and from focusing/defocusing by surface waves. For these reasons, an instrument that accurately measures the flux of UV in air will not work as well when submerged, and a number of elements must be optimized to produce instruments for use underwater. In response, Biospherical Instruments Inc. has produced the PUV-2500 Profiling Ultraviolet Radiometer. The system is designed to collect time series or vertical profiles of UV (305, 313, 320, 340, 380 and 395nm) and Photosynthetically Active Radiation (PAR: broadband 400-700 nm) irradiance underwater to depths of 350 meters. The PUV-2500 is designed to measure downwelling irradiance with a response capability exceeding nine decades of dynamic range, as well as pressure/depth, and water temperature. The PUV-2510 is a radiometrically-matching surface reference radiometer. Highly versatile because of its small size and lightweight design, the PUV-2500 can be used in traditional vertical profiling mode (surrounded by a lowering frame and supported by its own cable) or, by employing our free-fall design option, in free-descent mode, thereby helping to avoid artifacts associated with ship shadows.

Citation Download Citation

John H. Morrow, Thomas P. Comer, Randall N. Lind, James Robertson, and Charles R. Booth "A submersible radiometer for measuring solar UV irradiance over a wide dynamic range", Proc. SPIE 4896, Ultraviolet Ground- and Space-based Measurements, Models, and Effects II, (1 July 2003); https://doi.org/10.1117/12.466237

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available