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Cited by 20Marine and coastal ecosystemsGeology and Paleoclimatology ResearchPaleontology and Stratigraphy of Fossils

Changes in the dust‐influenced biological carbon pump in the canary current system: implications from a coastal and an offshore sediment trap record off Cape blanc, Mauritania

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Fischer, G., Romero, O., Toby, E., Iversen, M., Donner, B., Mollenhauer, G., Nowald, N., Ruhland, G. +3 more·2019·Global Biogeochemical Cycles
DOI 10.1029/2019gb006194
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Abstract

Long‐term data characterizing the oceans' biological carbon pump are essential for understanding impacts of climate variability on marine ecosystems. The “Bakun upwelling intensification hypothesis” suggests intensified coastal upwelling due to a greater land‐sea temperature gradient influenced by global warming. We present long time series of bathypelagic (approximately 1,200–3,600 m) particle fluxes from a coastal (CBeu: 2003–2016) and an offshore (CBmeso: 1988–2016) sediment trap setting located in the Canary Current upwelling. Organic carbon (C org) and biogenic opal (BSi, diatoms) fluxes were twofold to threefold higher at the coastal upwelling site compared to the offshore site, respectively, and showed higher seasonality with flux maxima in spring. A relationship between winter and spring BSi fluxes to the North Atlantic Oscillation index was best expressed at the offshore site CBmeso. Lithogenic (dust) fluxes regularly peaked in winter when frequent low‐altitude dust storms and deposition occurred, decreasing offshore by about threefold. We obtained a high temporal match of short‐term peaks of BSi and dust fluxes in winter to spring at the inner site CBeu. We found synchronous flux variations at both sites and an anomalous year 2005, characterized by high BSi and C org fluxes under a low North Atlantic Oscillation. C org and BSi fluxes revealed a decreasing trend from 2006 to 2016 at the coastal site CBeu, pointing to coastal upwelling relaxation during the last two decades. The permanent offshore upwelling zone of the deflected Canary Current represented by the flux record of CBmeso showed no signs of increasing upwelling as well which contradicts the Bakun hypothesis.

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  • There is a strong coupling between aeolian dust inputs and the efficiency of the biological pump to rapidly transfer new organic matter to higher trophic levels.

    “This points to a strong coupling between aeolian dust inputs and the efficiency of the biological pump to rapidly transfer new organic matter to higher trophic levels (Fischer et al., 2019;Romero et al., 2020).”

    From African desert dust influences migrations and fisheries of the Atlantic skipjack-tuna (2023) · cites this paper as Fischer et al., 2019

    The Summary and Outlook reports strong coupling between dust flux and biological-pump efficiency, and proposes rapid sedimentation of dust-ballasted organic aggregates. It does not say that the pump rapidly transfers new organic matter to higher trophic levels; the transfer described is downward particle export. (LLM, conf=0.90)

    Experimental — accuracy not yet measured

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References 120 · Cited by 20

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  1. Alheit, J., Licandro, P., Coombs, S., Garcia, A., Giráldez, A., Santamaría, M. T. G., et al. (2014). Atlantic Multidecadal Oscillation (AMO) modulates dynamics of small pelagic fishes and ecosystem regime shifts in the eastern North and Central Atlantic. Journal of Marine Systems, 133, 88-102. https://doi.org/10.1016/j.jmarsys.2014.02.005 · DOI
  2. Àlvarez-Salgado, X. A., Doval, M. D., Borges, A. V., Joint, I., Frankignoulle, M., Woodward, M., & Figueiras, F. G. (2001). Off-shelf fluxes of labile materials by an upwelling filament in the NW Iberian upwelling system. Progress in Oceanography, 51(2-4), 321-337. https://doi. org/10.1016/S0079-6611(01)00073-8 · DOI
  3. Anderson, T. R. (1994). Relating C:N ratios in zooplankton food and faecal pellets using a biochemical model. Journal of Experimental Marine Biology and Ecology, 184(2), 183-199. https://doi.org/10.1016/0022-0981(94)90004-3 · DOI
  4. Arístegui, J., Barton, E. C., Álvarez-Salgado, X. A., Santos, A. M. P., Figueiras, F. G., Kifani, S., et al. (2009). Sub-regional ecosystem variability in the Canary Current upwelling. Progress in Oceanography, 83(1-4), 33-48. https://doi.org/10.1016/j.pocean.2009.07.031 · DOI
  5. Arístegui, J., Barton, E. D., Tett, P., Montero, M. F., Garcia-Muñoz, M., Basteretxea, G., et al. (2004). Variability in plankton community structure, metabolism, and vertical carbon fluxes along an upwelling filament (Cape Juby, NW Africa). Progress in Oceanography, 62(2- 4), 95-113. https://doi.org/10.1016/j.pocean.2004.07.004 · DOI
  6. Armstrong, R. A., Peterson, M. L., Lee, C., & Wakeham, S. G. (2009). Settling velocity spectra and the ballast ratio hypothesis. Deep Sea Research, Part II, 56(18), 1470-1478. https://doi.org/10.1016/j.dsr2.2008.11.032 · DOI
  7. Baker, E. T., Milburn, H. B., & Tennant, D. A. (1988). Field assessment of sediment trap efficiency under varying flow conditions. Journal of Marine Research, 46(573-592), 1988.
  8. Bakun, A. (1990). Global climate change and intensification of coastal ocean upwelling. Science, 247(4939), 198-201. https://doi.org/ 10.1126/science.247.4939.198 · DOI · Paper page
  9. Bakun, A., Field, D., Redondo-Rodriguez, A., & Weeks, S. (2010). Greenhouse gas, upwelling-favorable winds, and the future of coastal ocean upwelling ecosystems. Global Change Biology, 16(4), 1213-1228. https://doi.org/10.1111/j.1365-2486.2009.02094.x · DOI
  10. Barth, J. A., Cowles, T. J., Kosro, P. M., Shearman, R. K., Huyer, A., & Smith, R. L. (2002). Injection of carbon from the shelf to offshore beneath the euphotic zone in the California Current. Journal of Geophysical Research, 107(C6), 3057. https://doi.org/10.1029/ 20001JC000956 · DOI
  11. Barton, E. D., Arìstegui, J., Tett, P., et al. (1998). Eastern Boundary of the North Atlantic: Northwest Africa and Iberia. In A. R. Robinson, & K. Brink (Eds.), The Global Coastal Ocean, (Vol. 11, pp. 29-67). New York: John Wiley and Sons.
  12. Becker, A., Finger, P., Meyer-Christoffer, A., Rudolf, B., Schamm, K., Schneider, U., & Ziese, M. (2013). A description of the global land- surface precipitation data products of the Global Precipitation Climatology Centre with sample applications including centennial (trend) analysis from 1901-present. Earth System Science Data, 5(1), 71-99. https://doi.org/10.5194/essd-5-71 · DOI
  13. Bory, A., Dulac, F., Moulin, C., Chiapello, I., Newton, P. P., Guelle, W., et al. (2002). Atmospheric and oceanic dust fluxes in the north- eastern tropical Atlantic Ocean: How close a coupling? Annual Geophysics, 20(12), 2067-2076. https://doi.org/10.5194/angeo-20-2067- 2002 · DOI
  14. Bory, A., Jeandel, C., Leblond, N., Vangriesheim, A., Khripounoff, A., Beaufort, L., et al. (2001). Downward particle flux within different productivity regimes off the Mauritanian upwelling zone (EUMELI program). Deep Sea Research, Part II, 48(10), 2251-2282. https://doi. org/10.1016/S0967-0637(01)00010-3 · DOI
  15. Bory, A., & Newton, P. P. (2000). Transport of airborne lithogenic material down through the water column in two contrasting regions of the eastern subtropical North Atlantic Ocean. Global Biogeochemical Cycles, 14(1), 297-315. https://doi.org/10.1029/ · DOI
  16. 1999GB900098 · DOI
  17. Boyd, P. W., Claustre, H., Levy, M., Siegel, D. A., & Weber, T. (2019). Multi-faceted particle pumps drive carbon sequestration in the ocean. Nature, 568(7752), 327-335. https://doi.org/10.1038/s41586-019-1098-2 · DOI
  18. Boyd, P. W., & Trull, T. W. (2007). Understanding the export of biogenic particles in oceanic waters: Is there consensus? Progress in Oceanography, 72(4), 276-312.
  19. Bradtmiller, L. I., McGee, D., Awalt, M., Evers, J., Yerxa, H., Kinsley, C. W., & de Menocal, P. B. (2015). Changes in biological pro- ductivity along the northwest African margin over the past 20,000 years. Paleoceanography, 31, 185-202. https://doi.org/10.1002/ 2015PA002862 · DOI
  20. Brust, J., Schulz-Bull, D. E., Leipe, T., Chavagnac, V., & Waniek, J. J. (2011). Descending particles: From the atmosphere to the deep ocean: A time series study in the subtropical NE Atlantic. Geophysical Research Letters, 38, L06603. https://doi.org/10.1029/2010GL045399 · DOI
  21. Carlson, T. N., & Prospero, J. M. (1972). The large-scale movement of Saharan air outbreaks over the Northern Equatorial Atlantic. Journal of Applied Meteorology, 11, 283-297. https://doi.org/10.1175/1520-8450450(1972)011<0283:TLSMOS>2.0.CO;2 · DOI
  22. Checkley, D. M. Jr., & Barth, J. A. (2009). Patterns and processes in the California Current Systems. Progress in Oceanography, 83, 49-64. 10.1029/2019GB006194 Global Biogeochemical Cycles Chen, X., & Tung, K.-K. (2018). Global surface warming enhanced by weak Atlantic overturning circulation. Nature, 387, 391-559. https:// doi.org/10.1038/s41586-018-0320-y · DOI · Paper page
  23. Chiapello, I., Moulin, C., & Prospero, J. M. (2005). Understanding the long-term variability of African dust transport across the Atlantic as recorded in both Barbados surface concentrations and large-scale Total Ozone Mapping Spectrometer (TOMS) optical thickness. Journal of Geophysical Research, 110, D18S10. https://doi.org/10.1029/2004JD005132 · DOI
  24. Cropper, T. E., Hanna, E., & Bigg, G. R. (2014). Spatial and temporal seasonal trends in coastal upwelling off Northwest Africa, 1981-2012. Deep Sea Research, Part II, 86, 94-111. https://doi.org/10.1016/j.dsr.2014.01.007 · DOI · Paper page
  25. Doney, S. C., Ruckelshaus, M., Duffy, M., Barry, J. P., Chan, F., English, C. A., et al. (2012). Climate change impacts on marine ecosystems. Annual Review in Marine Science, 4(1), 11-37. https://doi.org/10.1146/annurev-marine-041911-111611 · DOI · Paper page
  26. Ducklow, H. W., Doney, S. C., & Steinberg, D. K. (2009). Contributions of long-term research and time-series observations to marine ecology and biogeochemistry. Annual Review in Marine Science, 1(1), 279-302. https://doi.org/10.1146/annurev. marine.010908.163801 · DOI
  27. Estapa, M. L., Buesseler, K. O., Boss, E., & Gerbi, G. (2013). Autonomous, high-resolution observations of particle flux in the oligotrophic ocean. Biogeosciences, 10(8), 5517-5531. www.biogeosciences.net/10/5517/2013, https://doi.org/10.5194/bg-10-5517-2013 · DOI
  28. Fischer, G., Karakas, G., Blaas, M., Ratmeyer, V., Nowald, N., Schlitzer, R., et al. (2009). Mineral ballast and particle settling rates in the coastal upwelling system off NW Africa and the South Atlantic. International Journal of Earth Sciences, 98(2), 281-298. https://doi.org/ 10.1007/s00531-007-0234-7 · DOI
  29. Fischer, G., Krause, S. G., Neuer, S., & Wefer, G. (1996). Short-term sedimentation pulses recorded with a chlorophyll sensor and sediment traps in 900 m water depth in the Canary Basin. Limnology and Oceanography, 41(6), 1354-1359. https://doi.org/10.4319/ lo.1996.41.6.1354 · DOI
  30. Fischer, G., Reuter, C., Karakas, G., Nowald, N., & Wefer, G. (2009). Offshore advection of particles within the Cape Blanc filament, Mauritania: Results from observational and modelling studies. Progress in Oceanography, 83(1-4), 322-330. https://doi.org/10.1016/j. pocean.2009.07.023 · DOI
  31. Fischer, G., & Wefer, G. (1991). Sampling, preparation and analysis of marine particulate matter. In D. C. Hurd, & D. W. Spencer (Eds.), The Analysis and Characterization of Marine Particles, Geophysical Monograph Series, (Vol. 63, pp. 391-397). Washington DC: American Geophysical Union.
  32. Fréon, P., Barange, M., & Arìstegui, J. (2009). Eastern Boundary Upwelling Ecosystems: Integrative and comparative approaches. Progress in Oceanography, 83(1-4), 1-14. https://doi.org/10.1016/j.pocean.2009.08.001 · DOI
  33. Friese, C., van der Does, M., Merkel, U., Iversen, M., Fischer, G., & Stuut, J.-B. (2016). Environmental factors controlling the seasonal variation in particle size of modern Saharan dust deposited offshore Cape, Blanc. Aeolian Research, 22, 165-179. https://doi.org/10.1016/ j.aeolia.2016.04.005 · DOI
  34. Gabric, A. J., Garcìa, L., Van Camp, L., Nykjaer, L., Eifler, W., & Schrimpf, W. (1993). Offshore export of shelf production in the Cape Blanc (Mauritania) giant filament as derived from coastal zone color scanner imagery. Journal of Geophysical Research, 98(C3), 4697-4712. https://doi.org/10.1029/92JC01714 · DOI
  35. Gómez-Letona, M., Ramos, A. G., Coca, J., & Arístegui, J. (2017). Trends in primary production in the canary current upwelling system-A regional perspective comparing remote sensing models. Frontiers in Marine Science, 4(370), 1-18. https://doi.org/10.3390/ fmars.2017.00370 · DOI
  36. Hedges, J. I., Baldock, J. A., Gelinas, Y., Lee, C., Peterson, M. L., & Wakeham, S. G. (2002). The biochemical and elemental compositions of marine plankton: A NMR perspective. Marine Chemistry, 78(1), 47-63.
  37. Helmke, P., Romero, O., & Fischer, G. (2005). Northwest African upwelling and its effect on off-shore organic carbon export to the deep sea. Global Biogeochemical Cycles, 19, GB4015. https://doi.org/10.1029/2004GB002265 · DOI
  38. Henson, S. A., Sarmiento, J. L., Dunne, J. P., Bopp, L., Lima, I., Doney, S. C., et al. (2010). Detection of anthropogenic climate change in satellite records of ocean chlorophyll and productivity. Biogeosciences, 7(2), 621-640. https://doi.org/10.5194/bg-7- 621-2010 · DOI
  39. Honjo, S. (1996). Fluxes of particles to the interior of the open oceans. In V. Ittekkot, P. Schäfer, S. Honjo, & P. J. Depetris (Eds.), Particle Flux in the Ocean, (pp. 91-15). New York: John Wiley & Sons.
  40. Hwang, J., Manganini, S. J., Montlucaon, D. B., & Eglington, T. E. (2009). Dynamics of particle export on the Northwest Atlantic margin. Deep Sea Research, Part I, 56(10), 1792-1803. https://doi.org/10.1016/j.dsr.2009.05.007 · DOI
  41. Inthorn, M., Wagner, T., Scheeder, G., & Zabel, M. (2006). Lateral transport controls distribution, quality, and burial of organic matter along continental slopes in high-productivity areas. Geology, 34(3), 205-208. https://doi.org/10.1130/G22153.22151 · DOI
  42. Ittekkot, V. (1993). The abiotically driven biological pump in the ocean and short-term fluctuations in atmospheric CO 2 contents. Global and Planetary Change, 8(1-2), 17-25. https://doi.org/10.1016/0921-8181(93)90060-2 · DOI
  43. Iversen, M. H., Nowald, N., Ploug, H., Jackson, G. A., & Fischer, G. (2010). High resolution profiles of vertical particulate organic matter export off Cape Blanc, Mauritania: Degradation processes and ballasting effects. Deep Sea Research, Part I, 57(6), 771-784. https://doi. org/10.1016/j.dsr.2010.03.007 · DOI
  44. Iversen, M. H., & Ploug, H. (2010). Ballast minerals and the sinking carbon flux in the ocean: Carbon-specific respiration rates and sinking velocities of marine snow aggregates. Biogeosciences, 7, 2613-2624. https://doi.org/10.5194/bg-7-2613-2010 · DOI
  45. Jickells, T. D., An, Z. S., Andersen, K. K., Baker, A. R., Bergametti, G., Brooks, N., et al. (2005). Global iron connections between desert dust, ocean biogeochemistry, and climate. Science, 308(5718), 67-71. https://doi.org/10.1126/science.1105959 10.1029/2019GB006194 Global Biogeochemical Cycles Jones, P. D., Jónsson, T., & Wheeler, D. (1997). Extension to the North Atlantic Oscillation using early instrumental pressure observations from Gibraltar and South-West Iceland. International Journal of Climatolology, 17, 1433-1450. https://doi.org/10.1002/(SICI)1097- 0088(19971115)17:13<1433:AID-JOC203>3.0.CO;2-P Karakas, G., Nowald, N., Blaas, M., Marchesiello, P., Frickenhaus, S., & Schlitzer, R. (2006). High-resolution modeling of sediment erosion and particle transport across the northwest African shelf. Journal of Geophysical Research, 111, C06025. https://doi.org/10.1029/ 2005JC003296 · DOI
  46. Karakas, G., Nowald, N., Schäfer-Neth, C., Iversen, M., Barkmann, W., Fischer, G., et al. (2009). Impact of particle aggregation on fluxes of organic matter. Progress in Oceanography, 83(1-4), 331-341. https://doi.org/10.1016/j.pocean.2009.07.047 · DOI
  47. Kaufman, Y. J., Koren, I., Remer, L. A., Tanré, D., Ginoux, P., & Fan, S. (2005). Dust transport and deposition from the Terra-Moderate Resolution Imaging Spectroradiometer (MODIS) spacecraft over the Atlantic Ocean. Journal of Geophysical Research, 110, D10S12. https://doi.org/10.1029/2003JD004436 · DOI
  48. Klaas, C., & Archer, D. E. (2002). Association of sinking organic matter with various types of ballast in the deep sea: Implications for the rain ratio. Global Biogeochemical Cycles, 16(4), 1116. https://doi.org/10.1029/2001GB001765 · DOI · Paper page
  49. Knippertz, P., & Todd, M. C. (2012). Mineral dust aerosols over the Sahara: Meteorological controls on emission and transport and implications for modeling. Reviews of Geophysics, 50, RG1007. https://doi.org/10.1029/2011RG000362 · DOI
  50. Korte, L. F., Brummer, G.-J. A., van der Does, M., Guerreiro, C. V., Hennekam, R., van Hateren, J. A., et al. (2017). Downward particle fluxes of biogenic matter and Saharan dust across the equatorial North Atlantic. Atmosphere. Chemistry Physics, 17(9), 6023-6040. https://doi.org/10.5194/acp-17-6023-2017 · DOI
  51. Kremling, K., Lentz, U., Zeitzschell, B., Schulz-Bull, D. E., & Duinker, J. C. (1996). New type of time-series sediment trap for the reliable collection of inorganic and organic trace chemical substances. Review in Scientific Instrumentation, 67(12), 4360-4363. https://doi.org/ 10.1063/1.1147582 · DOI
  52. Lathuilière, C., Echevin, V., & Levy, M. (2008). Seasonal and intraseasonal surface chlorophyll-a variability along the northwest African coast. Journal of Geophysical Research, 13, C05007. https://doi.org/10.1029/2007JC004433 · DOI · Paper page
  53. Le Moigne, F. A. C., Pabortsava, K., Marcinko, C. L. J., Martin, P., & Sanders, R. J. (2014). Where is mineral ballast important for surface export of particulate organic carbon in the ocean? Geophysical Research Letters, 41, 8460-8468. https://doi.org/10.1002/ 2014GL061678 · DOI
  54. Lluch-Cota, S. E., Hoegh-Guldberg, O., Karl, D., Pörtner, H.-O., Sundby, S., & Gattuso, J. P. (2014). Cross-chapter box on uncertain trends in major upwelling ecosystems. In C. B. Field, et al. (Eds.), Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, (pp. 149-151). Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press.
  55. Lutz, M. J., Caldeira, K., Dunbar, R. B., & Behrenfeld, M. J. (2007). Seasonal rhythms of net primary production and particulate organic carbon flux to depth describe the efficiency of biological pump in the global ocean. Journal of Geophysical Research, 112, C10011. https:// doi.org/10.1029/2006JC003706 · DOI
  56. Mahowald, N. M., Kloster, S., Engelstaedter, S., Moore, J. K., Mukhopadhyay, S., McConnell, J. R., et al. (2010). Observed 20th century desert dust variability: Impact on climate and biogeochemistry. Atmosphere, Chemistry, Physics, 10(22), 10875-10893. https://doi.org/ 10.5194/acp-10-10875-2010 · DOI
  57. Martin, J. H., Knauer, G. A., Karl, D. M., & Broenkow, W. W. (1987). VERTEX: Carbon cycling in the northeast Pacific. Deep Sea Research, Part I, 34(2), 267-285. https://doi.org/10.1016/0198-0149(87)90086-0 · DOI · Paper page
  58. McCave, I. N., Halla, I. R., Antia, A. N., Chou, L., Dehairs, F., Lampitt, R. S., et al. (2001). Distribution, composition and flux of particulate material over the European margin at 47-50N. Deep Sea Research, Part II, 48(14-15), 3107-3139. https://doi.org/10.1016/S0967- 0645(01)00034-0 · DOI
  59. McDonnell, A. M. P., & Buesseler, K. O. (2010). Variability in the average sinking velocities of marine particles. Limnology and Oceanography, 55(5). https://doi.org/10.4319/lo.2010.55.5.0000 · DOI
  60. Messié, M., & Chavez, F. P. (2015). Seasonal regulation of primary production in eastern boundary upwelling systems. Progress in Oceanography, 134, 1-18. https://doi.org/10.1016/j.pocean.2014.10.011 · DOI
  61. Meunier, T., Barton, E. D., Barreiro, B., & Torres, R. (2012). Upwelling filaments off Cape Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? Journal of Geophysical Research, 117, C08031. https://doi.org/10.1029/ 2012JC007905 · DOI
  62. Mollenhauer, G., Basse, A., Kim, J.-H., Sinninghe Damsté, J. S., & Fischer, G. (2015). A four-year record of UK37-and TEX86-derived sea surface temperature estimates from sinking particles in the filamentous upwelling region off Cape Blanc, Mauritania. Deep Sea Research, Part I, 97, 67-79. https://doi.org/10.1016/j.dsr.2014.11.015 · DOI
  63. Müller, P. J. (1977). CN ratios in Pacific deep-sea sediments: Effect of inorganic ammonium and organic nitrogen compounds sorbed by clays. Geochimica et Cosmochimica Acta, 41(6), 765-776. https://doi.org/10.1016/0016-7037(77)90047-3 · DOI
  64. Müller, P. J., & Fischer, G. (2001). A four-year record of alkenones in the filamentous upwelling zone off Cape Blanc, NW Africa and a comparison with distributions in the underlying sediments. Deep Sea Research, Part I, 48(8), 1877-1903. https://doi.org/10.1016/S0967- 0637(00)00109-6 · DOI
  65. Muller-Karger, F. E., Varela, R., Thunell, R., Luerssen, R., Hu, C., & Walsh, J. J. (2005). The importance of continental margins in the global carbon cycle. Geophysical Research Letters, 32, L01602. https://doi.org/10.1029/2004GL021346 · DOI
  66. Neuer, S., Torres-Padrón, M. E., Gelado-Caballeo, M. D., Rueda, M. J., Hernández-Brito, J., Davenport, R., & Wefer, G. (2004). Dust deposition to the eastern subtropical North Atlantic gyre: Does ocean's biogeochemistry respond? Global Biogeochemical Cycles, 18, GB4020. https://doi.org/10.1029/2004GB002228 · DOI
  67. Nicholson, S. E. (2013). The West African Sahel. A review of recent studies on the rainfall regime and its interannual variability. ISRN Meteorology, 2013, 1-32. https://doi.org/10.1155/2013/453521 10.1029/2019GB006194 Global Biogeochemical Cycles Nowald, N., Iversen, M. H., Fischer, G., Ratmeyer, V., & Wefer, G. (2015). Time series of in-situ particle properties and sediment trap fluxes in the coastal upwelling filament off Cape Blanc, Mauritania. Progress in Oceanography, 137(Part A), 1-11. https://doi.org/10.1016/j. pocean.2014.12.015 · DOI
  68. Nowald, N., Karakas, G., Ratmeyer, V., Fischer, G., Schlitzer, R., Davenport, R., & Wefer, G. (2006). Distribution and transport processes of marine particulate matter off Cape Blanc (NW-Africa): Results from vertical camera profiles. Ocean Science Discussions, 3(4), 903-938. https://doi.org/10.5194/osd-3-903-2006 · DOI
  69. Passow, U., & de La Rocha, C. (2006). The accumulation of mineral ballast on organic aggregates. Global Biogeochemical Cycles, 20, GB1013. https://doi.org/10.1029/2005GB002579 · DOI
  70. Pastor, M. V., Palter, J. B., Pelegrí, J. L., & Dunne, J. P. (2013). Physical drivers of interannual chlorophyll variability in the eastern sub- tropical North Atlantic. Journal of Geophysical Research: Oceans, 118, 3871-3886. https://doi.org/10.1002/jgrc.20254 · DOI
  71. Pelegrí, J. L., Arístegui, J., Cana, L., González-Dávila, M., Hernández-Guerra, A., Hernández-León, S., et al. (2005). Coupling between the open-ocean and coastal upwelling region off northwest Africa: Water circulation and offshore pumping of organic matter. Journal of Marine Systems, 54(1-4), 3-7. https://doi.org/10.1016/j.jmarsys.2004.07.003 · DOI
  72. Pelegrí, J. L., Peña-Isquierdo, J., Machin, F., Meiners, C., & Presas-Navarro, C. (2017). Oceanography of the Cape Verde basin and Mauritanian slope waters. In A. Ramos, et al. (Eds.), Deep-Sea Ecosystems off Mauritania, (pp. 119-153). Berlin: Springer. https://doi.org/ 10.1007/978-94-024-1023-5_3 · DOI
  73. Ploug, H., Iversen, M. H., & Fischer, G. (2008). Ballast, sinking velocity, and apparent diffusivity within marine snow and zooplankton fecal pellets: Implications for substrate turnover by attached bacteria. Limnology and Oceanography, 53(5), 1878-1886. https://doi.org/ 10.4319/lo.2008.53.5.1878 · DOI
  74. Ploug, H., Iversen, M. H., Koski, M., & Buitenhuis, E. T. (2008). Production, oxygen respiration rates, and sinking velocity of copepod fecal pellets: Direct measurements of ballasting by opal and calcite. Limnology and Oceanography, 53(2), 469-476. https://doi.org/10.4319/ lo.2008.53.2.0469 · DOI
  75. Pradhan, Y., Lavender, S. J., Hardman-Mountford, N. J., & Aiken, J. (2006). Seasonal and inter-annual variability of chlorophyll-a con- centration in the Mauritanian upwelling: Observation of an anomalous event during 1998-1999. Deep Sea Research, Part II, 53(14-16), 1548-1559. https://doi.org/10.1016/j.dsr2.2006.05.016 · DOI
  76. Prospero, J. M., Landing, W. M., & Schulz, M. (2010). African dust deposition to Florida: Temporal and spatial variability and comparisons to models. Journal of Geophysical Research, 115, D13304. https://doi.org/10.1029/2009JD012773 · DOI
  77. Ragueneau, O., Schultes, S., Bidle, K., Claquin, P., & Moriceau, B. (2006). Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump. Global Biogeochemical Cycles, 20, GB4S02. https://doi.org/ 10.1029/2006GB002688 · DOI
  78. Ragueneau, O., Tréguer, P., Leynaert, A., Anderson, R. F., Brzezinski, M. A., DeMaster, D. J., et al. (2000). A review of the Si cycle in the modern ocean: Recent progress and missing gaps in the application of biogenic opal as a paleoproductivity proxy. Global and Planetary Change, 26(4), 317-365. https://doi.org/10.1016/S0921-8181(00)00052-7 · DOI
  79. Ratmeyer, V., Balzer, W., Bergametti, G., Chiapello, I., Fischer, G., & Wyputta, U. (1999). Seasonal impact of mineral dust on deep- ocean particle flux in the eastern subtropical Atlantic Ocean. Marine Geology, 159(1-4), 241-252. https://doi.org/10.1016/S0025- 3227(98)00197-2 · DOI
  80. Ratmeyer, V., Fischer, G., & Wefer, G. (1999). Lithogenic particle fluxes and grain size distributions in the deep ocean off northwest Africa: Implications for seasonal changes of aeolian dust input and downward transport. Deep Sea Research, Part II, 46(8), 1289-1337. https:// doi.org/10.1016/S0967-0637(99)00008-4 · DOI
  81. Riley, J. S., Sanders, R., Marsay, C., Le Moigne, F. A. C., Achterberg, E. P., & Poulton, A. J. (2012). The relative contribution of fast and slow sinking particles to ocean carbon export. Global Biogeochemical Cycles, 26, GB1026. https://doi.org/10.1029/ 2011GB004085 · DOI
  82. Romankevich, E. A. (1984). Geochemistry of Organic Matter in the Ocean. (p. 336). Berlin, Heidelberg, New York: Springer. https://doi.org/ 10.1007/978-3-642-49964-7 · DOI
  83. Romero, O., & Fischer, G. (2017). Shift in the species composition of the diatom community in the eutrophic Mauritanian coastal upwel- ling: Results from a multi-year sediment trap experiment from 2003 to 2010. Progress in Oceanography, 159, 31-44. https://doi.org/ 10.1016/j.pocean.2017.09.010 · DOI
  84. Romero, O. E., Kim, J. H., & Donner, B. (2008). Submillennial-to-millennial variability of diatom production off Mauritania, NW Africa, during the last glacial cycle. Paleoceanography, 23, PA3218. https://doi.org/10.1029/2008PA001601 · DOI
  85. Siegel, D. A., & Deuser, W. G. (1997). Trajectories of sinking particles in the Sargasso Sea: Modeling of statistical funnels above deep-ocean sediment traps. Deep Sea Research, Part I, 44(9-10), 1519-1541. https://doi.org/10.1016/S0967-0637(97)00028-9 · DOI
  86. Smeed, D. A., McCarthy, G. D., Cunningham, S. A., Frajka-Williams, E., Rayner, D., Johns, W. E., et al. (2014). Observed decline of the Atlantic meridional overturning circulation 2004-2012. Ocean Science, 10(1), 29-38. https://doi.org/10.5194/os-10-29-2014 · DOI
  87. Smith, K. L., Ruhl, H. A., Huffard, C. L., Messié, M., & Kahru, M. (2018). Episodic organic carbon fluxes from surface ocean to abyssal depths during long-term monitoring in NE Pacific. Proceedings of the National Academy of Sciences, 48, 12235-12240. https://doi.org/ 10.1073/pnas.1814559115 · DOI
  88. Srokosz, M. A., & Bryden, H. L. (2015). Observing the Atlantic Meridional Overturning Circulation yields a decade of inevitable surprises. Science, 348(6241), 1255575. https://doi.org/10.1126/science.1255575 · DOI
  89. Steinberg, D. K., Lomas, M. W., & Cope, J. S. (2012). Long-term increase in mesozooplankton biomass in the Sargasso Sea: Linkage to climate and implications for food web dynamics and biogeochemical cycling. Global Biogeochemical Cycles, 26, GB1004. https://doi.org/ 10.1029/2010GB004026 · DOI
  90. Stuut, J.-B. W., Zabel, M., Ratmeyer, V., Helmke, P., Schefuß, E., Lavik, G., & Schneider, R. R. (2005). Provenance of present-day eolian dust collected off NW Africa. Journal of Geophysical Research, 110, D04202. https://doi.org/10.1029/2004JD005161 · DOI
  91. Summerhayes, C. P., Birch, G. F., Rogers, J., & Dingle, R. V. (1973). Phosphate in sediments off southwestern Africa. Nature, 243(5409), 509-511. https://doi.org/10.1038/243509a0 · DOI
  92. Sydeman, W. J., Garcìa-Ryes, M., Schoeman, D. S., Rykaczewski, R. R., Thompson, S. A., Black, B. A., & Bogard, S. J. (2014). Climate change and wind intensification in coastal upwelling systems. Science, 345(6192), 77-80. https://doi.org/10.1126/ science.1251635 10.1029/2019GB006194 Global Biogeochemical Cycles Ternon, E., Guieu, C., Loye-Pilot, M.-D., Leblond, N., Bosc, E., Gasser, B., et al. (2010). The impact of Saharan dust on the particulate export in the water column of the North Western Mediterranean Sea. Biogeosciences, 7, 809-826. · DOI · Paper page
  93. Thunell, R., Benitez-Nelson, C., Varela, R., Astor, Y., & Muller-Karger, F. (2007). Particulate organic carbon fluxes along upwelling- dominated continental margins: Rates and mechanisms. Global Biogeochemical Cycles, 21, GB1022. https://doi.org/10.1029/ 2006GB002793 · DOI
  94. Van Camp, L., Nykjær, L., Mittelstaedt, E., & Schlittenhardt, P. (1991). Upwelling and boundary circulation off Northwest Africa as depicted by infrared and visible satellite observations. Progress in Oceanography, 26(4), 357-402. https://doi.org/10.1016/0079- 6611(91)90012-B Van der Jagt, H., Friese, C., Stuut, J.-B., Fischer, G., & Iversen, M. H. (2018). The ballasting effect of Saharan dust deposition on aggregate dynamics and carbon export: Aggregation, settling and scavenging of marine snow. Limnology and Oceanography, 63(3), 1386-1394. https://doi.org/10.1002/lno.10779 · DOI
  95. Varela, R., Àlvarez, I., Santos, F., de Castro, M., & Gómez-Gesteira, M. (2015). Has upwelling strengthened along worldwide coasts over 1982-2010. Nature Scientific Reports, 5, 10016. https://doi.org/10.1038/srep10016 · DOI
  96. Wang, D., Gouhier, T. C., Menge, B. A., & Ganguly, A. R. (2015). Intensification and spatial homogenization of coastal upwelling under climate change. Nature, 518(7539), 390-394. https://doi.org/10.1038/nature14235 · DOI · Paper page
  97. Wilson, J. D., Barker, S., & Ridgwell, A. (2012). Assessment of the spatial variability in particulate organic matter and mineral sinking fluxes in the ocean interior: Implications for the ballast hypothesis. Global Biogeochemical Cycles, 26, GB4011. https://doi.org/10.1029/ 2012GB004398 · DOI
  98. Zeeberg, J., Corten, A., Tjoe-Awie, P., Coca, J., & Hamady, B. (2008). Climate modulates the effects of Sardinella aurita fisheries off Northwest Africa. Fishery Research, 89(1), 65-75. https://doi.org/10.1016/j.fishres.2007.08.020 · DOI

Authors
Fischer, G., Romero, O., Toby, E., Iversen, M., Donner, B., Mollenhauer, G., Nowald, N., Ruhland, G., Klann, M., Hamady, B., & Wefer, G.
Affiliations
  • University of Bremen (DE)
  • Texas A&M University (US)
  • Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung (DE)
  • Institut Mauritanien de Recherches Océanographiques et des Pêches (MR)
Corresponding author
Fischer, G.
ORCID
Venue
Global Biogeochemical Cycles
Publisher
American Geophysical Union (AGU)
Published
2019-08
Volume
33
Issue
8
Pages
1100-1128
ISSN
  • 0886-6236 (ISSN-L)
  • 1944-9224
DOI
10.1029/2019gb006194
OpenAlex
W2965903901
Cited by
20
References
120
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 4 · 2021: 6 · 2020: 3
FWCI
1.80
Type
journal article
Language
en
Open access
Licence
Locations
  • Global Biogeochemical Cycles (publishedVersion, cc-by-nc-nd)
  • Helmholtz Centre for Ocean Research Kiel (GEOMAR) (acceptedVersion, other-oa)
  • Geo-Leo e-docs (Deutsche Initiative für Netzwerkinformation) (submittedVersion, cc-by-nc-nd)
  • Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut) (submittedVersion)
  • FID-GEO SUB
Funders
Deutsche Forschungsgemeinschaft (SFB 261,RCOM and MARUM excellence cluster)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Keywords
biological carbon pump, dust flux, organic carbon flux, sediment traps, North Atlantic Oscillation, Cape Blanc, diatoms, dust storms

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