Now showing items 1-20 of 20

  • Behaviour of the ocean DMS(P) pools in the Sargasso Sea viewed in a coupled physical-biogeochemical ocean model 

    Le Clainche, Yvonnick; Levasseur, Maurice; Vezina, Alain; Dacey, John W. H.; Saucier, Francois J. (National Research Council Canada, 2004-06-23)
    The dimethylsulfide (DMS) production model NODEM (Northern Oceans DMS Emission Model) was coupled with the water column ocean model GOTM (General Ocean Turbulence Model) that includes a two-equation k&150;ε turbulence ...
  • CO2 deposition over the multi-year ice of the western Weddell Sea 

    Zemmelink, Hendrik J.; Delille, B.; Tison, J. L.; Hintsa, Eric J.; Houghton, Leah; Dacey, John W. H. (American Geophysical Union, 2006-07-13)
    Field measurements by eddy correlation (EC) indicate an average uptake of 0.6 g CO2 m−2 d−1 by the ice-covered western Weddell Sea in December 2004. At the same time, snow that covers ice floes of the western Weddell Sea ...
  • Dimethylsulfide emissions over the multi-year ice of the western Weddell Sea 

    Zemmelink, Hendrik J.; Dacey, John W. H.; Houghton, Leah; Hintsa, Eric J.; Liss, P. S. (American Geophysical Union, 2008-03-20)
    This study, conducted in December 2004, is the first to present observations of DMS in a snow pack covering the multi-year sea ice of the western Weddell Sea. The snow layer is important because it is the interface through ...
  • Dimethylsulfoniopropionate in six species of giant clams and the evolution of dimethylsulfide after death 

    Hill, Richard W.; Dacey, John W. H.; Hill, Susan D.; Edward, Ahser; Hicks, Wayne A. (National Research Council Canada, 2004-06-23)
    Substantial accumulation of dimethylsulfoniopropionate (DMSP) is documented in tissues of all six of the common species of giant clams (Tridacnidae). Results include measures of DMSP concentrations in siphonal mantle, ...
  • Direct measurements of biogenic dimethylsulphide fluxes from the oceans : a synthesis 

    Zemmelink, Hendrik J.; Dacey, John W. H.; Hintsa, Eric J. (National Research Council Canada, 2004-06-24)
    This paper provides a brief overview of the state-of-the-art of techniques that are currently used for field measurements of trace gas fluxes and the subsequent derivation of gas transfer rates over the oceans. Special ...
  • Emission of dimethylsulfide from Weddell Sea leads 

    Zemmelink, Hendrik J.; Houghton, Leah; Dacey, John W. H.; Worby, A. P.; Liss, P. S. (American Geophysical Union, 2005-12-10)
    The distribution of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) was examined in lead water in pack ice of the Weddell Sea. Samples were taken by pulling water into a syringe from ...
  • Environmental turbulent mixing controls on air-water gas exchange in marine and aquatic systems 

    Zappa, Christopher J.; McGillis, Wade R.; Raymond, Peter A.; Edson, James B.; Hintsa, Eric J.; Zemmelink, Hendrik J.; Dacey, John W. H.; Ho, David T. (American Geophysical Union, 2007-05-17)
    Air-water gas transfer influences CO2 and other climatically important trace gas fluxes on regional and global scales, yet the magnitude of the transfer is not well known. Widely used models of gas exchange rates are based ...
  • Environmental, biochemical and genetic drivers of DMSP degradation and DMS production in the Sargasso Sea 

    Levine, Naomi M.; Varaljay, Vanessa A.; Toole, Dierdre A.; Dacey, John W. H.; Doney, Scott C.; Moran, Mary Ann (2011-10)
    Dimethylsulfide (DMS) is a climatically relevant trace gas produced and cycled by the surface ocean food web. Mechanisms driving intraannual variability in DMS production and dimethylsulfoniopropionate (DMSP) degradation ...
  • Fluxes and gas transfer rates of the biogenic trace gas DMS derived from atmospheric gradients 

    Zemmelink, Hendrik J.; Dacey, John W. H.; Hintsa, Eric J.; McGillis, Wade R.; Gieskes, Winfried W. C.; Klaassen, Wim; de Groot, Henk W.; Baar, Hein J. W. de (American Geophysical Union, 2004-06-30)
    Gas transfer rates were determined from vertical profile measurements of atmospheric dimethylsulfide (DMS) gradients over the equatorial Pacific Ocean obtained during the GasEx-2001 cruise. A quadratic relationship between ...
  • Gradients in dimethylsulfide, dimethylsulfoniopropionate, dimethylsulfoxide, and bacteria near the sea surface 

    Zemmelink, Hendrik J.; Houghton, Leah; Sievert, Stefan M.; Frew, Nelson M.; Dacey, John W. H. (Inter-Research, 2005-06-23)
    Gradients of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), dimethylsulfoxide (DMSO), and bacterial numbers and diversity from the surface microlayer to 500 cm depth were assessed in coastal waters surrounding ...
  • High concentrations and turnover rates of DMS, DMSP and DMSO in Antarctic sea ice 

    Asher, Elizabeth C.; Dacey, John W. H.; Mills, Matthew M.; Arrigo, Kevin R.; Tortell, Philippe D. (American Geophysical Union, 2011-12-14)
    The vast Antarctic sea-ice zone (SIZ) is a potentially significant source of the climate-active gas dimethylsulfide (DMS), yet few data are available on the concentrations and turnover rates of DMS and the related compounds ...
  • Influence of rain on air-sea gas exchange : lessons from a model ocean 

    Ho, David T.; Zappa, Christopher J.; McGillis, Wade R.; Bliven, Larry F.; Ward, Brian; Dacey, John W. H.; Schlosser, Peter; Hendricks, Melissa B. (American Geophysical Union, 2004-07-01)
    Rain has been shown to significantly enhance the rate of air-water gas exchange in fresh water environments, and the mechanism behind this enhancement has been studied in laboratory experiments. In the ocean, the effects ...
  • Metabolic balance of coastal Antarctic waters revealed by autonomous pCO2 and ΔO2/Ar measurements 

    Tortell, Philippe D.; Asher, Elizabeth C.; Ducklow, Hugh W.; Goldman, Johanna A. L.; Dacey, John W. H.; Grzymski, Joseph J.; Young, Jodi N.; Kranz, Sven A.; Bernard, Kim S.; Morel, Francois M. M. (John Wiley & Sons, 2014-10-03)
    We use autonomous gas measurements to examine the metabolic balance (photosynthesis minus respiration) of coastal Antarctic waters during the spring/summer growth season. Our observations capture the development of a massive ...
  • Metabolism of dimethylsulfoniopropionate (DMSP) by juvenile Atlantic menhaden Brevoortia tyrannus 

    Hill, Richard W.; Dacey, John W. H. (Inter-Research, 2006-09-30)
    Dimethylsulfoniopropionate (DMSP) synthesized by marine phytoplankton is the principal source of dimethylsulfide (DMS), an important climate-affecting gas. Prior research has demonstrated that grazing by invertebrate ...
  • Physical exchanges at the air–sea interface : UK–SOLAS field measurements 

    Brooks, Ian M.; Bloom, A. Anthony; Brooks, Barbara J.; Lingard, Justin J. N.; McQuaid, James B.; Norris, Sarah J.; Smith, Michael H.; Smith, Paul D.; Yelland, Margaret J.; Moat, Ben I.; Pascal, Robin W.; Prytherch, John; Srokosz, Meric; Taylor, Peter K.; Upstill-Goddard, Robert C.; Salter, Matt; Nightingale, Philip D.; Archer, Stephen D.; Beale, Rachael; Dixon, Jo; Goldson, Laura E.; Hardman-Mountford, Nick; Liddicoat, Malcolm; Moore, Gerald; Stephens, John A.; D'Asaro, Eric A.; McNeil, Craig L.; Beatty, Cory; DeGrandpre, Michael D.; Blomquist, Byron; Huebert, Barry; Cluderay, John; Zemmelink, Hendrik J.; Coles, David; Hsueh, Ping-Chang; Leighton, Timothy G.; Dacey, John W. H.; Drennan, William M.; Rebozo, Mike; Sahlee, Erik; Gabriele, Joseph; Hill, Martin K.; Horn, Matt; De Leeuw, Gerrit; Neill, Craig; Skjelvan, Ingunn; O'Doherty, Simon; Walsh, Roisin; Young, Dickon; Schuster, Ute; Telszewski, Maciej; Slagter, Hans; Ward, Brian; Woolf, David K. (American Meteorological Society, 2009-05)
    As part of the U.K. contribution to the international Surface Ocean–Lower Atmosphere Study, a series of three related projects—DOGEE, SEASAW, and HiWASE—undertook experimental studies of the processes controlling the ...
  • Processing of ingested dimethylsulfoniopropionate by mussels Mytilus edulis and scallops Argopecten irradians 

    Hill, Richard W.; Dacey, John W. H. (Inter-Research, 2007-08-07)
    Dimethylsulfoniopropionate (DMSP) synthesized by marine phytoplankton is the principal source of dimethylsulfide (DMS), an important climate-affecting gas. Grazing by small zooplankton on phytoplankton often accelerates ...
  • Rain-induced turbulence and air-sea gas transfer 

    Zappa, Christopher J.; Ho, David T.; McGillis, Wade R.; Banner, Michael L.; Dacey, John W. H.; Bliven, Larry F.; Ma, Barry; Nystuen, Jeffrey A. (American Geophysical Union, 2009-07-09)
    Results from a rain and gas exchange experiment (Bio2 RainX III) at the Biosphere 2 Center demonstrate that turbulence controls the enhancement of the air-sea gas transfer rate (or velocity) k during rainfall, even though ...
  • Relaxed eddy accumulation measurements of the sea-to-air transfer of dimethylsulfide over the northeastern Pacific 

    Zemmelink, Hendrik J.; Gieskes, Winfried W. C.; Klaassen, Wim; Beukema, Wim J.; de Groot, Henk W.; Baar, Hein J. W. de; Hintsa, Eric J.; McGillis, Wade R.; Dacey, John W. H. (American Geophysical Union, 2004-01-30)
    Gas transfer rates were determined from relaxed eddy accumulation (REA) measurements of the flux of dimethylsulfide (DMS) over the northeastern Pacific Ocean. This first application of the REA technique for the measurement ...
  • Sea-to-air fluxes from measurements of the atmospheric gradient of dimethylsulfide and comparison with simultaneous relaxed eddy accumulation measurements 

    Hintsa, Eric J.; Dacey, John W. H.; McGillis, Wade R.; Edson, James B.; Zappa, Christopher J.; Zemmelink, Hendrik J. (American Geophysical Union, 2004-01-30)
    We measured vertical profiles of dimethylsulfide (DMS) in the atmospheric marine boundary layer from R/P FLIP during the 2000 FAIRS cruise. Applying Monin-Obukhov similarity theory to the DMS gradients and simultaneous ...
  • Supplement to physical exchanges at the air–sea interface : UK–SOLAS field measurements 

    Brooks, Ian M.; Yelland, Margaret J.; Upstill-Goddard, Robert C.; Nightingale, Philip D.; Archer, Stephen D.; D'Asaro, Eric A.; Beale, Rachael; Beatty, Cory; Blomquist, Byron; Bloom, A. Anthony; Brooks, Barbara J.; Cluderay, John; Coles, David; Dacey, John W. H.; DeGrandpre, Michael D.; Dixon, Jo; Drennan, William M.; Gabriele, Joseph; Goldson, Laura E.; Hardman-Mountford, Nick; Hill, Martin K.; Horn, Matt; Hsueh, Ping-Chang; Huebert, Barry; De Leeuw, Gerrit; Leighton, Timothy G.; Liddicoat, Malcolm; Lingard, Justin J. N.; McNeil, Craig L.; McQuaid, James B.; Moat, Ben I.; Moore, Gerald; Neill, Craig L.; Norris, Sarah J.; O'Doherty, Simon; Pascal, Robin W.; Prytherch, John; Rebozo, Mike; Sahlee, Erik; Salter, Matt; Schuster, Ute; Skjelvan, Ingunn; Slagter, Hans; Smith, Michael H.; Smith, Paul D.; Srokosz, Meric; Stephens, John A.; Taylor, Peter K.; Telszewski, Maciej; Walsh, Roisin; Ward, Brian; Woolf, David K.; Young, Dickon; Zemmelink, Hendrik J. (American Meteorological Society, 2009-05)