Production regimes in four Eastern Boundary Current systems

Carr, Mary‐Elena; Kearns, Edward J.

doi:10.1016/j.dsr2.2003.07.015

Cited by 273 publications

(251 citation statements)

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“…However, as noted above, τ Al may be as much as an order of magnitude less than the assumed value of 5 years in regions of abundant particles [53], such as the biologically productive Canary Current upwelling regime in the eastern portion of our study area [57]. Furthermore, dilution of Al in the surface layer by upwelling of Al-depleted thermocline water off NW Africa (see fig.…”

Section: (A) Aerosol Depositionmentioning

confidence: 88%

How well can we quantify dust deposition to the ocean?

Anderson

Cheng

Edwards

et al. 2016

Phil. Trans. R. Soc. A.

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One contribution of 20 to a discussion meeting issue 'Biological and climatic impacts of ocean trace element chemistry'. Deposition of continental mineral aerosols (dust) in the Eastern Tropical North Atlantic Ocean, between the coast of Africa and the Mid-Atlantic Ridge, was estimated using several strategies based on the measurement of aerosols, trace metals dissolved in seawater, particulate material filtered from the water column, particles collected by sediment traps and sediments. Most of the data used in this synthesis involve samples collected during US GEOTRACES expeditions in 2010 and 2011, although some results from the literature are also used. Dust deposition generated by a global model serves as a reference against which the results from each observational strategy are compared. Observation-based dust fluxes disagree with one another by as much as two orders of magnitude, although most of the methods produce results that are consistent with the reference model to within a factor of 5. The large range of estimates indicates that further work is needed to reduce uncertainties associated with each method before it can be applied routinely to map dust deposition to the ocean. Calculated dust deposition using observational strategies thought to have the smallest uncertainties is lower than the reference model by a factor of 2-5, suggesting that the model may overestimate dust deposition in our study area.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.

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Section: (A) Aerosol Depositionmentioning

confidence: 88%

How well can we quantify dust deposition to the ocean?

Anderson

Cheng

Edwards

et al. 2016

Phil. Trans. R. Soc. A.

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show abstract

“…In the continental margins, oceanographic conditions are characterized for being highly dynamic, where intense vertical fluxes of nutrients are generated, which favor the high maintenance of primary productivity. Specially, currents of the oriental margins of the oceans are the most productive regions of the planet (California Current, Humboldt C., Canarian C. and Benguela C.), it is also associated with the intensity of the coastal upwellings (Carr and Kearns, 2003).…”

Section: Oceanographic Conditions In the Tropical Pacific In Frontmentioning

confidence: 99%

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Morales

Vásquez

Caicedo³

et al. 2017

rbio

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“…Close to South America the anthropogenic CO 2 concentrations are controlled by the origin of the upwelling (especially its depth) and by the thermocline position. According to Carr and Kearns (2003), the upwelling water comes from isopycnal layers ranging from σ θ =25.6 kg.m −3 to σ θ =26.2 kg.m −3 . Between 15 • S and 34 • S, the vertical displacement of the upwelled waters at the ocean surface does not typically exceed 50 m.…”

Section: Distributions Of Anthropogenic Co 2 Concentrations and Anthrmentioning

confidence: 99%