In:
Marine Technology Society Journal, Marine Technology Society, Vol. 36, No. 1 ( 2002-03-01), p. 23-28
Abstract:
A submersible pCO 2 measurement system with a membrane tube equilibrator and a nondispersive infrared gas analyzer was developed. The system was designed to measure the partial pressure of CO 2 in seawater and the atmosphere, and physical parameters
related to CO 2 changes, including light intensity, temperature, salinity, dissolved oxygen, and pH. A CPU controls the operation and logs the data. The analyzer and CPU are contained in a titanium cylinder. The power consumption is 15 W, which is supplied by 1419 dry alkaline manganese
dioxide battery cells contained in three PVC cylinders. We tested the system on a barrier reef flat in the Palau Islands, and monitored pCO 2 and physical parameters from November 1999 to December 2000. The system worked for 50 hours a week, and we changed the battery
unit every 4 months. The accuracy of pCO 2 measurement was ±5 μatm and the response time was 3 minutes. The results showed diurnal changes in the pCO 2 in reef water on a coral reef flat, which corresponded to daytime photosynthesis
and nighttime respiration.
Type of Medium:
Online Resource
ISSN:
0025-3324
DOI:
10.4031/002533202787914241
Language:
English
Publisher:
Marine Technology Society
Publication Date:
2002
detail.hit.zdb_id:
410693-3
detail.hit.zdb_id:
2730536-3
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