Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES (2024)

Charette, M. A., Lam, P. J., Lohan, M. C., Kwon, E. Y., Hatje, V., Jeandel, C., Shiller, A. M., Cutter, G. A., Thomas, A., Boyd, P. W., hom*oky, W. B., Milne, A., Thomas, H., Andersson, P. S., Porcelli, D., Tanaka, T., Geibert, W., Dehairs, F., & Garcia-Orellana, J. (2016). Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374(2081), 20160076-20160076. https://doi.org/10.1098/rsta.2016.0076

Charette, Matthew A. ; Lam, Phoebe J. ; Lohan, Maeve C. et al. / Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES. In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2016 ; Vol. 374, No. 2081. pp. 20160076-20160076.

@article{e01e1f32e91e456186e56448421c5db1,

title = "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES",

abstract = "Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf 228Ra fluxes are combined with TEI/ 228Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3–23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean. This article is part of the themed issue {\textquoteleft}Biological and climatic impacts of ocean trace element chemistry{\textquoteright}.",

author = "Charette, {Matthew A.} and Lam, {Phoebe J.} and Lohan, {Maeve C.} and Kwon, {Eun Young} and Vanessa Hatje and Catherine Jeandel and Shiller, {Alan M.} and Cutter, {Gregory A.} and A Thomas and Boyd, {Philip W.} and hom*oky, {William B.} and Angela Milne and H Thomas and Andersson, {Per S.} and Don Porcelli and Takahiro Tanaka and Walter Geibert and Frank Dehairs and Jordi Garcia-Orellana",

year = "2016",

month = nov,

day = "28",

doi = "10.1098/rsta.2016.0076",

language = "English",

volume = "374",

pages = "20160076--20160076",

journal = "Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences",

issn = "1364-503X",

number = "2081",

}

Charette, MA, Lam, PJ, Lohan, MC, Kwon, EY, Hatje, V, Jeandel, C, Shiller, AM, Cutter, GA, Thomas, A, Boyd, PW, hom*oky, WB, Milne, A, Thomas, H, Andersson, PS, Porcelli, D, Tanaka, T, Geibert, W, Dehairs, F & Garcia-Orellana, J 2016, 'Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES', Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 374, no. 2081, pp. 20160076-20160076. https://doi.org/10.1098/rsta.2016.0076

Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES. / Charette, Matthew A.; Lam, Phoebe J.; Lohan, Maeve C. et al.
In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 374, No. 2081, 28.11.2016, p. 20160076-20160076.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES

AU - Charette, Matthew A.

AU - Lam, Phoebe J.

AU - Lohan, Maeve C.

AU - Kwon, Eun Young

AU - Hatje, Vanessa

AU - Jeandel, Catherine

AU - Shiller, Alan M.

AU - Cutter, Gregory A.

AU - Thomas, A

AU - Boyd, Philip W.

AU - hom*oky, William B.

AU - Milne, Angela

AU - Thomas, H

AU - Andersson, Per S.

AU - Porcelli, Don

AU - Tanaka, Takahiro

AU - Geibert, Walter

AU - Dehairs, Frank

AU - Garcia-Orellana, Jordi

PY - 2016/11/28

Y1 - 2016/11/28

N2 - Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf 228Ra fluxes are combined with TEI/ 228Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3–23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.This article is part of the themed issue ‘Biological and climatic impacts of ocean trace element chemistry’.

AB - Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf 228Ra fluxes are combined with TEI/ 228Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3–23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.This article is part of the themed issue ‘Biological and climatic impacts of ocean trace element chemistry’.

U2 - 10.1098/rsta.2016.0076

DO - 10.1098/rsta.2016.0076

M3 - Article

SN - 1364-503X

VL - 374

SP - 20160076

EP - 20160076

JO - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

JF - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

IS - 2081

ER -

Charette MA, Lam PJ, Lohan MC, Kwon EY, Hatje V, Jeandel C et al. Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2016 Nov 28;374(2081):20160076-20160076. Epub 2016 Oct 17. doi: 10.1098/rsta.2016.0076