@article{45afcdba613f49f09c0be4408d3e8a10,
title = "A Lagrangian biogeochemical study of an eddy in the Northeast Atlantic",
abstract = "We report the results of an experiment in the Northeast Atlantic in which sulphur hexafluoride (SF6) was released within an eddy and the behaviour of trace gases, nutrients and productivity followed within a Lagrangian framework over a period of 24 days. Measurements were also made in the air above the eddy in order to estimate air-sea exchange rates for some components. The physical, biological and biogeochemical properties of the eddy resemble those of other eddies studied in this area, suggesting that the results we report may be applicable beyond the specific eddy studied. During a period of low wind speed at the start of the experiment, we are able to quantitatively describe and balance the nutrient and carbon budgets for the eddy. We also report concentrations of various trace gases in the region which are similar to those observed in other studies and we estimate exchange rates for several trace gases. We show that the importance of gas exchange over other loss terms varies with time and also varies for the different gases. We show that the various trace gases considered (CO2, dimethyl sulphide (DMS), N2O, CH4, non-methane-hydrocarbons, methyl bromide, methyl iodide and volatile selenium species) are all influenced by physical and biological processes, but the overall distribution and temporal variability of individual gases are different to one another. A storm disrupted the stratification in the eddy during the experiment, resulting in enhanced nutrient supply to surface waters, enhanced gas exchange rates and a change in plankton community, which we quantify, although overall productivity was little changed. Emphasis is placed on the regularity of storms in the temperate ocean and the importance of these stochastic processes in such systems.",
keywords = "Air-sea exchange, Nutrients, Primary productivity, Trace gases",
author = "Jickells, {T. D.} and Liss, {P. S.} and W. Broadgate and S. Turner and Kettle, {A. J.} and J. Read and J. Baker and Cardenas, {L. M.} and F. Carse and M. Hamren-Larssen and L. Spokes and M. Steinke and A. Thompson and A. Watson and Archer, {S. D.} and Bellerby, {R. G.J.} and Law, {C. S.} and Nightingale, {P. D.} and Liddicoat, {M. I.} and Widdicombe, {C. E.} and A. Bowie and Gilpin, {L. C.} and G. Moncoiff{\'e} and G. Savidge and T. Preston and P. Hadziabdic and T. Frost and R. Upstill-Goddard and C. Pedr{\'o}s-Ali{\'o} and R. Sim{\'o} and A. Jackson and A. Allen and DeGrandpre, {M. D.}",
note = "Funding Information: NERC grants GST/02/1276 supported the work of Jickells and Spokes, GST/02/1278 the work of Liss and Nightingale together with core funding to the Plymouth Marine Laboratory (PML) while the ACSOE core programme supported Broadgate and the shiptime costs, NERC grant GR9/3467 to G.S. supported Moncoiff{\'e} and Gilpin. Steinke was supported by NERC grant GR3/10956. The University of Newcastle upon Tyne Research Committee provided funding to support T. Frost. The work of Sim{\'o} and Pedr{\'o}s-Ali{\'o} was supported by the Spanish McyT grant MAR97-1885-E. Our thanks go to Steve Groom, Peter Miller and Tim Smyth from the Remote Sensing Data Analysis Service at PML for their help and support of this cruise and for providing Fig. 2 to Dave Meldrum of Dunstaffnage Marine Laboratory for the loan of one GPS buoy and for his help in tracking its path and to Russell Davison (SOC) for phytoplankton counts. We also thank the officers and crew of RRS Discovery and UKORS staff Jeff Benson, Martin Bridger, Jeff Jones, Rob Lloyd, Pete Mason and Dave Tears for all their help in making this cruise a success. We gratefully acknowledge access to the HYSPLIT4 (Hybrid Single-Particle Lagrangian Integrated Trajectory) Model, 1997 at http://www.arl.noaa.gov/ready/hysplt4.html , NOAA Air Resources Laboratory, Silver Spring MD, USA. ",
year = "2008",
month = mar,
doi = "10.1016/j.pocean.2008.01.006",
language = "English",
volume = "76",
pages = "366--398",
journal = "Progress in Oceanography",
issn = "0079-6611",
publisher = "Elsevier Ltd",
number = "3",
}