@article{fdi:010060620,
  title = {{S}patial and temporal variability of the {CO}2 fluxes in a tropical, highly urbanized estuary},
  author = {{N}oriega, {C}. {E}. {D}. and {A}raujo, {M}. and {L}ef{\`e}vre, {N}athalie},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he spatial and temporal variations of the flux of {CO}2 were determined during 2007 in the {R}ecife estuarine system ({RES}), a tropical estuary that receives anthropogenic loads from one of the most populated and industrialized areas of the {B}razilian coast. {T}he {RES} acts as a source of nutrients ({N} and {P}) for coastal waters. {T}he calculated {CO}2 fluxes indicate that the upstream inputs of {CO}2 from the rivers are largely responsible for the net annual {CO}2 emission to the atmosphere of +30 to +48 mmol m(-2) day(-1), depending on the {CO}2 exchange calculation used, which mainly occurs during the late austral winter and early summer. {T}he observed inverse relationship between the {CO}2 flux and the net ecosystem production ({NEP}) indicates the high heterotrophy of the system (except for the months of {N}ovember and {D}ecember). {T}he {NEP} varies between -33 mmol m(-2) day(-1) in summer and -246 mmol m(-2) day(-1) in winter. {T}he p{CO}(2) values were permanently high during the study period (average similar to 4,700 mu atm) showing a gradient between the inner (12,900 mu atm) and lower (389 mu atm) sections on a path of approximately 30 km. {T}his reflects a state of permanent pollution in the basin due to the upstream loading of untreated domestic effluents ({N}/{P} = 1,367:6 mu mol kg(-1) and p{H} = 6.9 in the inner section), resulting in the continuous mineralization of organic material by heterotrophic organisms and thereby increasing the dissolved {CO}2 in estuarine waters.},
  keywords = {{E}cosystem metabolism ; {C}arbon dioxide fluxes ; p{CO}(2) ; {R}ecife estuary ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{E}stuaries and {C}oasts},
  volume = {36},
  numero = {5},
  pages = {1054--1072},
  ISSN = {1559-2723},
  year = {2013},
  DOI = {10.1007/s12237-013-9608-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060620},
}