Oceanographic processes in an Amazon estuary during an atypical rainy season

This study examined short-term and spatial fluctuations in hydrodynamic and hydrological variables in an Amazon estuary. The campaign was conducted during the neap tide of an atypical rainy season. Three stations were established in the upper, middle and lower sectors of the estuary to obtain surfac...

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Bibliographic Details
Published in:Journal of coastal research 2013-01, Vol.2 (65), p.1104-1104
Main Authors: da Costa, Adila Kelly Rodrigues, Pereira, Luci Cajueiro Carneiro, da Costa, Rauquirio Marinho, Monteiro, Marcela Cunha, Flores-Montes, Manuel de Jesus
Format: Article
Language:English
Subjects:
Chlorophylls
Coastal
El Nino
Estuaries
Floods
Fluid mechanics
Hydrology
Meters
Neap tides
Oceanography
Oceans
Rain
Rainy season
Seasons
Turbidity
Water analysis
Water sampling
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Summary:This study examined short-term and spatial fluctuations in hydrodynamic and hydrological variables in an Amazon estuary. The campaign was conducted during the neap tide of an atypical rainy season. Three stations were established in the upper, middle and lower sectors of the estuary to obtain surface and bottom data during flood and ebb tides. Water samples were collected simultaneously in Niskin bottles to determine pH and chlorophyll a levels. In the mid-estuary sector, a mooring was mounted to the bottom with a tide data logger, a CTDO and a mini-current meter for 25 hours. Precipitation levels in April 2012, were 31% lower in comparison with the same month of the previous year, reflecting the effects of an El Nino event. The temperature of the water was high and stable, varying from 28.5 degrees Celsius to 30 degrees Celsius. Salinity was higher and turbidity was lower when compared to a typical rainy season.
ISSN:0749-0208
1551-5036
DOI:10.2112/SI65-187