Article (Scientific journals)
Carbon dioxide dynamics in rivers and coastal waters of the ABig Island@ of Hawaii, USA, during baseline and heavy rain condition
Paquay, F. S.; Mackenzie, F. T.; Borges, Alberto
2007In Aquatic Geochemistry, 13 (1), p. 1-18
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Abstract :
[en] The distributions of the partial pressure of carbon dioxide (pCO2) and total alkalinity (TA) were examined for a 6-month period in the Wailuku and Wailoa rivers and coastal waters of Hilo Bay on the west coast of the Island of Hawaii, USA. Main results for the largest and turbulent Wailuku River show in the watershed an oversaturation in CO2 with respect to atmospheric equilibrium and a CO2 undersaturation in the estuary. In the Wailoa river-estuary system, extremely high pCO2 values ranging from 1500 to 10500 ppm were measured with significant shifts in pCO2 from drought to flood period. In the two rivers, water residence time, groundwater inputs and occasional flood events are the predominant drivers of the spatial and temporal patterns in the distribution of pCO2. In Hilo Bay, CO2 oversaturation dominates and the bay was a source of CO2 to the atmosphere during the study period. TA is conservative along the salinity gradient, indicating calcification in the bay is not a significant source of CO2 to the atmosphere.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Paquay, F. S.
Mackenzie, F. T.
Borges, Alberto  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Language :
English
Title :
Carbon dioxide dynamics in rivers and coastal waters of the ABig Island@ of Hawaii, USA, during baseline and heavy rain condition
Publication date :
2007
Journal title :
Aquatic Geochemistry
ISSN :
1380-6165
Publisher :
Springer Science & Business Media B.V., New York, United States - New York
Volume :
13
Issue :
1
Pages :
1-18
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 December 2008

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