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Dynamics of O 2 and CO 2 exchange, photosynthesis, and respiration in rivers from time‐delayed correlations with ideal sunlight
Author(s) -
Schurr J. M.,
Ruchti J.
Publication year - 1977
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1977.22.2.0208
Subject(s) - photosynthesis , oxygen , chemistry , respiration , analytical chemistry (journal) , oxygen evolution , respiration rate , reaction rate constant , environmental chemistry , kinetics , electrode , botany , physics , biology , electrochemistry , biochemistry , organic chemistry , quantum mechanics
The oxygen exchange constant, photosynthetic rate, and respiration rate for several Swiss rivers have been determined using only the continuous data record of a single oxygen electrode, the measured temperature, and an assumed ideal light intensity curve in conjunction with a simple model rate equation and a novel cross‐correlation computational technique. The method can, in favorable circumstances, be extended to determine also total carbonate dynamics from continuous pH measurements. For the Aare at Bern in March 1974, the oxygen exchange constant was 0.38 h −1 , the respiration rate was 0.6 mg liter −1 h −1 , and mean photosynthetic rate was 0.28 mg liter −1 The exchange rate for dissolved (but not hydrated or ionized) CO 2 was 0.91 times that for dissolved oxygen, and the ratio of O 2 molecules released to CO 2 molecules consumed during photosynthesis was about 1.2.