Silicate regulation of new production in the equatorial Pacific upwelling

@article{Dugdale1998SilicateRO,
  title={Silicate regulation of new production in the equatorial Pacific upwelling},
  author={Richard C. Dugdale and Frances P. Wilkerson},
  journal={Nature},
  year={1998},
  volume={391},
  pages={270-273}
}
Surface waters of the eastern equatorial Pacific Ocean present the enigma of apparently high plant-nutrient concentrations but low phytoplankton biomass and productivity. One explanation for this ‘high-nitrate, low-chlorophyll’ (HNLC) phenomenon has been that growth is limited by iron availability,. Here we use field data and a simple silicon-cycle model to investigate the HNLC condition for the upwelling zone of this ocean region. Measured silicate concentrations in surface waters are low and… 

Iron and silicate regulation of new and export production in the equatorial Pacific: A physical‐biological model study

Based on a physical‐biological model with monthly mean forcing, numerical experiments are conducted to examine the effects of iron and silicate availability on phytoplankton growth in the equatorial

Correction to “Iron and silicate regulation of new and export production in the equatorial Pacific: A physical‐biological model study”

[1] Based on a physical-biological model with monthly mean forcing, numerical experiments are conducted to examine the effects of iron and silicate availability on phytoplankton growth in the

Silicon‐nitrogen coupling in the equatorial Pacific upwelling zone

We describe the role of diatoms on nitrogen and silicon cycling in the equatorial Pacific upwelling zone (EUZ) using water column nutrient data from 19 equatorial cruises and particle concentration,

Size‐fractionated nitrogen uptake measurements in the equatorial Pacific and confirmation of the low Si–high‐nitrate low‐chlorophyll condition

The first size-fractionated new and regenerated production rates for the EUZ are reported with the objective of validating the conceptual basis and functioning of the CoSINE model and finding the larger phytoplankton had greater rates of new production and higher f-ratios.

Iron-limited diatom growth and Si:N uptake ratios in a coastal upwelling regime

There is compelling evidence that phytoplankton growth is limited by iron availability in the subarctic Pacific, and equatorial Pacific and Southern oceans. A lack of iron prevents the complete

Diatom carbon export enhanced by silicate upwelling in the northeast Atlantic

It is shown that, with nitrate still available for new production, the diatom bloom is prolonged where there is a periodic supply of new silicate: specifically, diatoms thrive by ‘mining’ deep-water silicate brought to the surface by an unstable ocean front.

Effects of changing N:P supply on phytoplankton in the eastern tropical Pacific and Atlantic Ocean

The tropical South East Pacific is characterized by strong coastal upwelling on the narrow continental shelf and an intense oxygen minimum zone (OMZ) in the intermediate water layer. These

Iron biogeochemistry in (sub-) Polar waters

Iron represents an important control on primary production in high nutrient low chlorophyll (HNLC) regimes and has received considerably attention during the last two decades. This work has focussed
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