La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	CO2 Input Dynamics and Air-Sea Exchange in a Large New England Estuary
Auteurs :	Christopher W. Hunt, Auteur ; Joseph E. Salisbury, Auteur ; Douglas Vandemark, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (37(5) SEP 2014)
Article en page(s) :	1078-1091
Résumé :	Repeated surveys of the Kennebec estuary, a macrotidal river estuary in Maine, USA, between 2004 and 2008 found spatial and temporal variability both in sources of carbon dioxide (CO2) to the estuary and the air-sea flux of estuary CO2. On an annual basis, the surveyed area of the Kennebec estuary had an area-weighted average partial pressure of CO2 (pCO(2)) of 559 mu atm. The area-weighted average CO2 flux to the atmosphere was 3.54 mol C m(-2) year(-1). Overall, the Kennebec estuary was an annual source of 7.2 x 10(7) mol CO2 to the atmosphere. Distinct seasonality in estuarine pCO(2) was observed, with shifts in the seasonal pattern evident between lower and higher salinities. Fluxes of CO2 from the estuary were elevated following two summertime storms, and inputs of riverine CO2 outweighed internal estuarine CO2 inputs in nearly all months. River and estuarine inputs of CO2 represented 68 and

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