Help! Estimates of CO2 uptake ...

[Frank E. Muller-Karger]

Viviane:
Check the following references also. NOte that there are many
very good satellite
images of the Amazon delta region and the coast to the north and south
collected in the early 1980's by the Coastal Zone Color Scanner, and more 
recently by SeaWiFS. I
agree that the Amazon discharge never flows to the south of the mouth, as
far as I know. The currents are too strong, and the wind also
tends to push things toward the northwest.

See these references for general patterns:

Muller-Karger, F. E., P. L. Richardson, and D. McGillicuddy. 1995. On the
offshore dispersal of the Amazon's Plume in the North Atlantic. Deep-Sea
Research I, Vol. 42, No. 11/12, 2127-2137.

Muller-Karger, F. E., C. R. McClain, and P. L. Richardson. 1988. The
dispersal of the Amazon's water. Nature. 333. 56-59.

Regards,
Frank

On Wed, 21 Mar 2001, Viviane Testa wrote:

> Dear all,
> Just a short parallel comment about the Amazon river before I depart to the
> field:
> 
> The transport of sediments derived from the Amazon river follow the trend
> of the North Brazil Current, i.e. northwest. These sediments do not
> "spreads downwards along the Brazilian coast". Generally the northeaster
> and eastern Brazilian waters are poor in suspended matter, unless one is
> looking at regions close to river mouths (generally few kms).
> 
> Indeed the coral fauna is poor compared to other regions, e.g. Caribbean,
> SE Asia. Turbidity and high levels of suspended sediments are some of the
> important aspects to take into account when dealing with coral occurrences.
> One has to consider also the hydrological pattern (direction and speed,
> etc), the evolution of the Brazilian continental shelf and the distance
> from the main foci of genes. The reason why Brazilian waters are poor
> related to coral reefs (apart from Abrolhos) is an unsolved problem, as
> well as why ooids are not common in these modern environment and why
> calcareous algae are so abundant since Tertiary.
> 
> Thanks,
> 	Viviane
> 
> .....................................................................
> Viviane Testa, Ph.D.
> Centro de Pesquisas em Geofísica e Geologia-IGEO
> Universidade Federal da Bahia - UFBA
> Rua Caetano Moura, 123
> 40210-340   Salvador, Ba    Brasil
> 
> e-mail:	vtesta at cpgg.ufba.br
> Tel:    +55.(021)71.332.94.33 / 237.04.08
> Fax:   +55.(021)71.247.30.04
> 
> http://www.cpgg.ufba.br/lec
> ....................................................................
> 
> 
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