dc.contributor.author |
Monteiro, Pedro MS
|
|
dc.contributor.author |
Nelson, G
|
|
dc.contributor.author |
van der Plas, A
|
|
dc.contributor.author |
Mabille, E
|
|
dc.contributor.author |
Bailey, GW
|
|
dc.contributor.author |
Klingelhoeffer, E
|
|
dc.date.accessioned |
2007-06-12T07:29:25Z |
|
dc.date.available |
2007-06-12T07:29:25Z |
|
dc.date.issued |
2005-09 |
|
dc.identifier.citation |
Monteiro, PMS, et al. 2005. Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system. Continental Shelf Research, vol 25(15), pp 1864-1876 |
en |
dc.identifier.issn |
0278-4343 |
|
dc.identifier.uri |
http://hdl.handle.net/10204/542
|
|
dc.description |
Copyright: 2005 Pergamon-Elsevier Science Ltd |
en |
dc.description.abstract |
The role of internal tides in driving the sedimentation and re-suspension of biogenic POM, has been investigated, and the investigation provided the basis to formulate the hypothesis that the benthic boundary layer turbulence at the shelf break zones of the Namibian shelf and probably most of the Benguela is dominated by both tidal bores and high frequency soliton activity. At the continental shelf of Namibia, sediments with high concentrations of POM are confined to three well-defined long shore belts of 500-800 km in length. Temperature time series data from the benthic boundary layer at three sites was used to assume that the dominant forcing mechanisms are internal tides and their interaction with the shelf break zones. The investigation further showed that the modulation of the amplitude is closely linked to the lunar and semi-diurnal barotropic tides but the frequency of variability of the baroclinic component also includes a supra-tidal frequency of less than an hour. To conclude observations have been made that Namibian upwelling systems, ecologically significant hypoxia events are seasonally ubiquitous in the inner shelf and often linked to, inter-annually more variable, extreme sulphide rich methane eruptions. Historical work in the Benguela system suggested that, below the gravity wave base, the POM distribution in the mud belts of the Namibian shelf sediments is linked to long period physical mechanisms. These include both intensification of Ekman driven currents and inertial flows near the bottom at the shelf break. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Pergamon-Science Ltd |
en |
dc.subject |
Particular organic carbon |
en |
dc.subject |
Benthic boundary layer |
en |
dc.subject |
Namibian shelf break zones |
en |
dc.subject |
Upwelling shelf systems |
en |
dc.subject |
Environmental sciences |
en |
dc.title |
Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Monteiro, P. M., Nelson, G., van der Plas, A., Mabille, E., Bailey, G., & Klingelhoeffer, E. (2005). Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system. http://hdl.handle.net/10204/542 |
en_ZA |
dc.identifier.chicagocitation |
Monteiro, Pedro MS, G Nelson, A van der Plas, E Mabille, GW Bailey, and E Klingelhoeffer "Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system." (2005) http://hdl.handle.net/10204/542 |
en_ZA |
dc.identifier.vancouvercitation |
Monteiro PM, Nelson G, van der Plas A, Mabille E, Bailey G, Klingelhoeffer E. Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system. 2005; http://hdl.handle.net/10204/542. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Monteiro, Pedro MS
AU - Nelson, G
AU - van der Plas, A
AU - Mabille, E
AU - Bailey, GW
AU - Klingelhoeffer, E
AB - The role of internal tides in driving the sedimentation and re-suspension of biogenic POM, has been investigated, and the investigation provided the basis to formulate the hypothesis that the benthic boundary layer turbulence at the shelf break zones of the Namibian shelf and probably most of the Benguela is dominated by both tidal bores and high frequency soliton activity. At the continental shelf of Namibia, sediments with high concentrations of POM are confined to three well-defined long shore belts of 500-800 km in length. Temperature time series data from the benthic boundary layer at three sites was used to assume that the dominant forcing mechanisms are internal tides and their interaction with the shelf break zones. The investigation further showed that the modulation of the amplitude is closely linked to the lunar and semi-diurnal barotropic tides but the frequency of variability of the baroclinic component also includes a supra-tidal frequency of less than an hour. To conclude observations have been made that Namibian upwelling systems, ecologically significant hypoxia events are seasonally ubiquitous in the inner shelf and often linked to, inter-annually more variable, extreme sulphide rich methane eruptions. Historical work in the Benguela system suggested that, below the gravity wave base, the POM distribution in the mud belts of the Namibian shelf sediments is linked to long period physical mechanisms. These include both intensification of Ekman driven currents and inertial flows near the bottom at the shelf break.
DA - 2005-09
DB - ResearchSpace
DP - CSIR
KW - Particular organic carbon
KW - Benthic boundary layer
KW - Namibian shelf break zones
KW - Upwelling shelf systems
KW - Environmental sciences
LK - https://researchspace.csir.co.za
PY - 2005
SM - 0278-4343
T1 - Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system
TI - Internal tide—shelf topography interactions as a forcing factor governing the large-scale distribution and burial fluxes of particulate organic matter (POM) in the Benguela upwelling system
UR - http://hdl.handle.net/10204/542
ER -
|
en_ZA |