Journal of Geophysical Research: Atmospheres (1984–2012)


  1. Aerosol and Clouds

    1. Top of page
    2. Aerosol and Clouds
    3. Composition and Chemistry
    1. You have free access to this content
      Dimethyl sulfide air-sea fluxes and biogenic sulfur as a source of new aerosols in the Arctic fall

      Ofelia Rempillo, Alison Michelle Seguin, Ann-Lise Norman, Michael Scarratt, Sonia Michaud, Rachel Chang, Steve Sjostedt, Jon Abbatt, Brent Else, Tim Papakyriakou, Sangeeta Sharma, Steve Grasby and Maurice Levasseur

      Article first published online: 17 DEC 2011 | DOI: 10.1029/2011JD016336

      Key Points

      • Biogenic sulfur dioxide concentrations were sufficient for new aerosol formation
      • MSA to biogenic sulfate ratio was found higher than reported in literature
      • DMS, MSA, and non sea salt sulfate showed good correlation
  2. Composition and Chemistry

    1. Top of page
    2. Aerosol and Clouds
    3. Composition and Chemistry
    1. You have free access to this content
      Field and satellite observations of the formation and distribution of Arctic atmospheric bromine above a rejuvenated sea ice cover

      Son V. Nghiem, Ignatius G. Rigor, Andreas Richter, John P. Burrows, Paul B. Shepson, Jan Bottenheim, David G. Barber, Alexandra Steffen, Jeff Latonas, Feiyue Wang, Gary Stern, Pablo Clemente-Colón, Seelye Martin, Dorothy K. Hall, Lars Kaleschke, Philip Tackett, Gregory Neumann and Matthew G. Asplin

      Article first published online: 15 MAR 2012 | DOI: 10.1029/2011JD016268

      Key Points

      • Drastic reduction of Arctic perennial sea ice leading to younger and saltier ice
      • More bromine explosions occurred over the saltier sea ice during cold periods
      • Mountain topography controls distribution of tropospheric bromine enhancement
    2. You have free access to this content
      Relating atmospheric and oceanic DMS levels to particle nucleation events in the Canadian Arctic

      Rachel Y.-W. Chang, Steven J. Sjostedt, Jeffrey R. Pierce, Tim N. Papakyriakou, Michael G. Scarratt, Sonia Michaud, Maurice Levasseur, W. Richard Leaitch and Jonathan P. D. Abbatt

      Article first published online: 1 NOV 2011 | DOI: 10.1029/2011JD015926

      Key Points

      • Particle nucleation was observed in the Canadian Arctic
      • These events coincided with high DMS levels in the atmosphere and ocean
      • Model results suggest that DMS oxidation products could have caused nucleation
    3. You have free access to this content
      LIDAR measurements of Arctic boundary layer ozone depletion events over the frozen Arctic Ocean

      J. A. Seabrook, J. Whiteway, R. M. Staebler, J. W. Bottenheim, L. Komguem, L. H. Gray, D. Barber and M. Asplin

      Article first published online: 28 OCT 2011 | DOI: 10.1029/2011JD016335

      Key Points

      • LIDAR measured tropospheric ozone depletions over sea ice
      • Correlation between mixing ratio and connection to sea ice
      • Strong correlation between mixing ratio and potential temperature
    1. You have free access to this content
      Geophysical controls on C band polarimetric backscatter from melt pond covered Arctic first-year sea ice: Assessment using high-resolution scatterometry

      R. K. Scharien, J. J. Yackel, D. G. Barber, M. Asplin, M. Gupta and D. Isleifson

      Article first published online: 29 AUG 2012 | DOI: 10.1029/2011JC007353

      Key Points

      • C band polarimetric scattering from melt pond covered sea ice is evaluated
      • The co-polarization ratio is distinct for melt ponds
      • Cross-polarization backscatter discriminates melt-freeze events
    2. You have free access to this content
      Variability of phytoplankton light absorption in Canadian Arctic seas

      Corinne B. Brunelle, Pierre Larouche and Michel Gosselin

      Article first published online: 3 AUG 2012 | DOI: 10.1029/2011JC007345

      Key Points

      • Characterize spatial and temporal variations of phytoplankton light absorption
      • Determine the main sources of variability
    3. You have free access to this content
      Respiration and bacterial carbon dynamics in the Amundsen Gulf, western Canadian Arctic

      Dan Nguyen, Roxane Maranger, Jean-Éric Tremblay and Michel Gosselin

      Article first published online: 16 JUN 2012 | DOI: 10.1029/2011JC007343

      Key Points

      • High respiration in Arctic waters
      • Low bacterial growth efficiencies
      • High respiration rates are likely supported by regenerated primary production
    4. You have free access to this content
      First measurements of nitrous oxide in Arctic sea ice

      Kevin Randall, Michael Scarratt, Maurice Levasseur, Sonia Michaud, Huixiang Xie and Michel Gosselin

      Article first published online: 19 MAY 2012 | DOI: 10.1029/2011JC007340

      Key Points

      • These are the first measurements of N2O in sea ice
      • N2O was consistently undersaturated in ice with respect to the atmosphere
      • N2O dynamics in freeze-melt cycle may contribute to atmospheric N2O variations
    5. You have free access to this content
      Tide-induced vertical mixing in the Laptev Sea coastal polynya

      Igor A. Dmitrenko, Sergey A. Kirillov, Ekaterina Bloshkina and Yueng-Djern Lenn

      Article first published online: 17 MAY 2012 | DOI: 10.1029/2011JC006966

      Key Points

      • Tidal-driven velocity shear across halocline layer was recorded in polynya area
      • The velocity shear can be strong enough to promote vertical mixing
      • Shear events are consistent with baroclinic tide enhanced by spring-neap cycle
    6. You have free access to this content
      Annual cycles of pCO2sw in the southeastern Beaufort Sea: New understandings of air-sea CO2 exchange in arctic polynya regions

      B. G. T. Else, T. N. Papakyriakou, R. J. Galley, A. Mucci, M. Gosselin, L. A. Miller, E. H. Shadwick and H. Thomas

      Article first published online: 6 APR 2012 | DOI: 10.1029/2011JC007346

      Key Points

      • The annual pCO2 cycle in the southeastern Beaufort Sea is described for 2007-2008
      • The pCO2 cycling in Arctic polynyas is more complex than previously thought
      • Several previously unconsidered processes are shown to control pCO2 in the area
    7. You have free access to this content
      Impact of Siberian coastal polynyas on shelf-derived Arctic Ocean halocline waters

      Dorothea Bauch, Jens A. Hölemann, Igor A. Dmitrenko, Markus A. Janout, Anna Nikulina, Sergey A. Kirillov, Thomas Krumpen, Heidemarie Kassens and Leo Timokhov

      Article first published online: 5 APR 2012 | DOI: 10.1029/2011JC007282

      Key Points

      • Production of Laptev Sea bottom water in coastal polynya observed during winter
      • Interannual differences depend on preconditioning, not on amount of sea ice
      • Advection determines structure of water column which is preserved till summer
    8. You have free access to this content
      Distribution and metabolism of dimethylsulfoniopropionate (DMSP) and phylogenetic affiliation of DMSP-assimilating bacteria in northern Baffin Bay/Lancaster Sound

      J. Motard-Côté, M. Levasseur, M. G. Scarratt, S. Michaud, Y. Gratton, R. B. Rivkin, K. Keats, M. Gosselin, J.-É. Tremblay, R. P. Kiene and C. Lovejoy

      Article first published online: 3 FEB 2012 | DOI: 10.1029/2011JC007330

      Key Points

      • Bacterial DMSP metabolism was studied in the Arctic
      • Between 40% and 65% of the bacteria used DMSP
      • Different water masses have distinct DMSP dynamics
    9. You have free access to this content
      Dynamics of pCO2and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea)

      N.-X. Geilfus, G. Carnat, T. Papakyriakou, J.-L. Tison, B. Else, H. Thomas, E. Shadwick and B. Delille

      Article first published online: 2 FEB 2012 | DOI: 10.1029/2011JC007118

      Key Points

      • First vertical profile of pCO2 within sea ice
      • Air-ice CO2 fluxes in the Amundsen Gulf
      • Impact of sea ice physical and biogeochemical processes on pCO2 dynamics
    10. You have free access to this content
      Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean

      Melissa Chierici, Agneta Fransson, Bruno Lansard, Lisa A. Miller, Alfonso Mucci, Elizabeth Shadwick, Helmuth Thomas, J.-E. Tremblay and Tim N. Papakyriakou

      Article first published online: 30 DEC 2011 | DOI: 10.1029/2011JC007184

      Key Points

      • Biological processes dominate the seasonal variability in CaCO 3 saturation state
      • Unique data set with full annual cycle of biogeochemical data
      • Aragonite undersaturation due to physical upwelling
    11. You have free access to this content
      Barium and carbon fluxes in the Canadian Arctic Archipelago

      Helmuth Thomas, Elizabeth Shadwick, Frank Dehairs, Bruno Lansard, Alfonso Mucci, Jacques Navez, Yves Gratton, Friederike Prowe, Melissa Chierici, Agneta Fransson, Tim N. Papakyriakou, Erika Sternberg, Lisa A. Miller, Jean-Éric Tremblay and Christophe Monnin

      Article first published online: 8 DEC 2011 | DOI: 10.1029/2011JC007120

      Key Points

      • Seasonal cycle of Ba is established
      • Carbon export production is estimated
      • Balanced carbon budget
    12. You have free access to this content
      On the scaling laws derived from ice beacon trajectories in the southern Beaufort Sea during the International Polar Year - Circumpolar Flaw Lead study, 2007–2008

      J. V. Lukovich, D. G. Babb and D. G. Barber

      Article first published online: 19 NOV 2011 | DOI: 10.1029/2011JC007049

      Key Points

      • Existence of distinct scaling laws for zonal and meridional absolute dispersion
      • Definitive zonal and meridional timescales for sea ice in the Beaufort Sea
      • Ice-atmosphere interactions in Beaufort Sea during 2007–2008 winter
    13. You have free access to this content
      Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum

      M. Luce, M. Levasseur, M. G. Scarratt, S. Michaud, S.-J. Royer, R. Kiene, C. Lovejoy, M. Gosselin, M. Poulin, Y. Gratton and M. Lizotte

      Article first published online: 16 NOV 2011 | DOI: 10.1029/2010JC006914

      Key Points

      • Low but significant DMSP microbial uptake takes place in late fall in the Arctic
      • Microbial DMSP uptake appears to be limited by bacterial production
      • DMS production is low but significant under ice-free conditions in late fall
    14. You have free access to this content
      Spatiotemporal variations of dissolved organic carbon and carbon monoxide in first-year sea ice in the western Canadian Arctic

      Guisheng Song, Huixiang Xie, Cyril Aubry, Yong Zhang, Michel Gosselin, C. J. Mundy, Benoît Philippe and Tim N. Papakyriakou

      Article first published online: 9 NOV 2011 | DOI: 10.1029/2010JC006867

      Key Points

      • DOC and CO are enriched in the bottom of Arctic landfast and drifting sea ice
      • DOC production is a significant fraction of ice algal production
      • Sea ice is a source of CO to the atmosphere
    15. You have free access to this content
      Carbonate system evolution at the Arctic Ocean surface during autumn freeze-up

      Lisa A. Miller, Gauthier Carnat, Brent G. T. Else, Nes Sutherland and Timothy N. Papakyriakou

      Article first published online: 13 OCT 2011 | DOI: 10.1029/2011JC007143

      Key Points

      • New sea ice can release CO2 to the air or water
      • Brine analyses do not appear to be effective for determining CO2 in sea ice
    16. You have free access to this content
      Wintertime CO2 fluxes in an Arctic polynya using eddy covariance: Evidence for enhanced air-sea gas transfer during ice formation

      B. G. T. Else, T. N. Papakyriakou, R. J. Galley, W. M. Drennan, L. A. Miller and H. Thomas

      Article first published online: 20 SEP 2011 | DOI: 10.1029/2010JC006760

      Key Points

      • High rates of CO2 exchange were observed over flaw leads using eddy covariance
      • Enhanced gas exchange is hypothesized to be due to ice formation in leads
      • Enhanced gas exchange is important to annual air-sea CO2 budgets of this region
    17. You have free access to this content
      Impact of horizontal spreading on light propagation in melt pond covered seasonal sea ice in the Canadian Arctic

      Jens K. Ehn, C. J. Mundy, David G. Barber, Haakon Hop, Andrea Rossnagel and Jeremy Stewart

      Article first published online: 2 SEP 2011 | DOI: 10.1029/2010JC006908

      Key Points

      • Optical properties of melting sea ice
      • Horizontal propagation of light affects sea ice transmittance
      • Progression of flooded surface to distinct melt ponds

SEARCH

SEARCH BY CITATION