IPEV Home

French Polar Institute Literature Database

Home |  Show All |  Simple Search |  Advanced Search
Quick Search:
771–780 of 8781 records found matching your query (RSS | history):
Select All    Deselect All [61–70] << 71 72 73 74 75 76 77 78 79 80 >> [81–90]
List View
 | 
Citations
 | 
Details
   print
  Records Links
Author Parikka J, Le Romancer M, Wauters N & Jacquet S openurl 
  Title Insights into Virus-host relationships. Type Conference - International - Poster
  Year 2014 Publication Abbreviated Journal  
  Volume Issue Pages  
  Keywords  
  Abstract EMBO Conference, Viruses of Microbes III, Zurich (Switzerland), 14-18 July.  
  Programme 1077  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5209  
Permanent link to this record
 
 
Author L. Testut and A.S Unnikrishnan openurl 
  Title Overview of the Sea Level research activities in France, Indo-French collaboration : current status and perspective Type Conference - International - Communication
  Year 2014 Publication Abbreviated Journal  
  Volume Issue Pages  
  Keywords  
  Abstract 20 january 2014, INCOIS, Hyderabad (India).
 
  Programme 688  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5208  
Permanent link to this record
 
 
Author Picard G, Royer A, Arnaud L, Fily M, doi  openurl
  Title Influence of meter-scale wind-formed features on the variability of the microwave brightness temperature around Dome C in Antarctica Type Journal Article
  Year 2014 Publication The Cryosphere Abbreviated Journal TC  
  Volume 8 Issue 3 Pages 1105-1119  
  Keywords  
  Abstract based on BIPOL and CALVA-snow  
  Programme 1110  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1994-0424 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5207  
Permanent link to this record
 
 
Author Fréville H, Brun E, Picard G, Tatarinova N, Arnaud L, Lanconelli C, Reijmer C, van den Broeke M, doi  openurl
  Title Using MODIS land surface temperatures and the Crocus snow model to understand the warm bias of ERA-Interim reanalyses at the surface in Antarctica Type Journal Article
  Year 2014 Publication The Cryosphere Abbreviated Journal TC  
  Volume 8 Issue 4 Pages 1361-1373  
  Keywords  
  Abstract based on CALVA-snow activities  
  Programme 1110  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1994-0424 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5206  
Permanent link to this record
 
 
Author Libois Quentin, Picard Ghislain, Dumont Marie, Arnaud Laurent, Sergent Claude, Pougatch Evelyne, Sudul Marcel, Vial David, doi  openurl
  Title Experimental determination of the absorption enhancement parameter of snow Type Journal Article
  Year 2014 Publication Journal of Glaciology Abbreviated Journal  
  Volume 60 Issue 222 Pages 714-724  
  Keywords SNOW, SNOW CHEMISTRY, SNOW PHYSICS, SNOW/ICE SURFACE PROCESSES,  
  Abstract In optical models snow is commonly treated as a disperse collection of particles. In this representation, the penetration depth of solar radiation is sensitive to the shape of the particles, in particular to the absorption enhancement parameter, B, that quantifies the lengthening
 
  Programme 1110  
  Campaign  
  Address  
  Corporate Author Thesis Bachelor's thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0022-1430 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5205  
Permanent link to this record
 
 
Author Roussel D., Marmillot V., Rouanet J.L., Monternier P.A. openurl 
  Title Mitochondrial phenotypic flexibility enhances energy savings during winter fast in king penguin chicks. 10ième journée scientifique du Comité National Français des Recherches Arctiques et Antarctiques (CNFRA), Rennes. (26-27 mai) Type Conference - National - Communication
  Year 2014 Publication Abbreviated Journal  
  Volume Issue Pages  
  Keywords  
  Abstract  
  Programme 131  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5204  
Permanent link to this record
 
 
Author Palerme C, Kay J E, Genthon C, L'Ecuyer T, Wood N B, Claud C, doi  openurl
  Title How much snow falls on the Antarctic ice sheet? Type Journal Article
  Year 2014 Publication The Cryosphere Abbreviated Journal  
  Volume 8 Issue 4 Pages 1577-1587  
  Keywords  
  Abstract Abstract: Climate models predict Antarctic precipitation to increase during the 21st century, but their present day Antarctic precipitation differs. A model-independent climatology of the Antarctic precipitation characteristics, such as snowfall rates and frequency, is needed to assess the models, but was not available so far. Satellite observation of precipitation by active spaceborne sensors has been possible in the polar regions since the launch of CloudSat in 2006. Here we use two CloudSat products to build the first multi-year model-independent climatology of Antarctic precipitation. The first product is used to determine the frequency and the phase of precipitation, while the second product is used to assess the snowfall rate. The mean snowfall rate from August 2006 to April 2011 is 171 mm/year over the Antarctic ice sheet north of 82°S. While uncertainties on individual precipitation retrievals from CloudSat data are potentially large, the mean uncertainty should be much smaller but cannot be easily estimated. There are no in situ measurements of Antarctic precipitation to directly assess the new climatology. However distributions of both precipitation occurrences and rates generally agree with the ECMWF ERA-Interim dataset, the production of which is constrained by various in situ and satellite observations but did not use any data from CloudSat. The new dataset thus offers unprecedented capability to quantitatively assess Antarctic precipitation statistics and rates in climate models.  
  Programme 1013  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1994-0424 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5201  
Permanent link to this record
 
 
Author Carmagnola C M, Morin S, Lafaysse M, Domine F, Lesaffre B, Lejeune Y, Picard G, Arnaud L, doi  openurl
  Title Implementation and evaluation of prognostic representations of the optical diameter of snow in the SURFEX/ISBA-Crocus detailed snowpack model Type Journal Article
  Year 2014 Publication The Cryosphere Abbreviated Journal TC  
  Volume 8 Issue 2 Pages 417-437  
  Keywords  
  Abstract In the SURFEX/ISBA-Crocus multi-layer snowpack model, the snow microstructure has up to now been characterised by the grain size and by semi-empirical shape variables which cannot be measured easily in the field or linked to other relevant snow properties. In this work we introduce a new formulation of snow metamorphism directly based on equations describing the rate of change of the optical diameter (dopt). This variable is considered here to be equal to the equivalent sphere optical diameter, which is inversely proportional to the specific surface area (SSA). dopt thus represents quantitatively some of the geometric characteristics of a porous medium. Different prognostic rate equations of dopt, including a re-formulation of the original Crocus scheme and the parameterisations from Taillandier et al. (2007) and Flanner and Zender (2006), were evaluated by comparing their predictions to field measurements carried out at Summit Camp (Greenland) in May and June 2011 and at Col de Porte (French Alps) during the 2009/10 and 2011/12 winter seasons. We focused especially on results in terms of SSA. In addition, we tested the impact of the different formulations on the simulated density profile, the total snow height, the snow water equivalent (SWE) and the surface albedo. Results indicate that all formulations perform well, with median values of the RMSD between measured and simulated SSA lower than 10 m2 kg-1. Incorporating the optical diameter as a fully fledged prognostic variable is an important step forward in the quantitative description of the snow microstructure within snowpack models, because it opens the way to data assimilation of various electromagnetic observations.  
  Programme 1042  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1994-0424 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5199  
Permanent link to this record
 
 
Author Legrand M, Preunkert S, Frey M, Bartels-Rausch T, Kukui A, King M D, Savarino J, Kerbrat M, Jourdain B, doi  openurl
  Title Large mixing ratios of atmospheric nitrous acid (HONO) at Concordia (East Antarctic plateau) in summer: a strong source from surface snow? Type Journal Article
  Year 2014 Publication Atmos. Chem. Phys. Discuss. Abbreviated Journal  
  Volume 14 Issue 8 Pages 11749-11785  
  Keywords  
  Abstract During the austral summer 2011/2012 atmospheric nitrous acid was investigated for the second time at the Concordia site (75060 S, 123330 E) located on the East Antarctic plateau by deploying a long path absorption photometer (LOPAP). Hourly mixing ratios of HONO measured in December 2011/January 2012 (35±5.0 pptv) were similar to those measured in December 2010/January 2011 (30.4±3.5 pptv). The large value of the HONO mixing ratio at the remote Concordia site suggests a local source of HONO in addition to weak production from oxidation of NO by the OH radical. Laboratory experiments demonstrate that surface snow removed from Concordia can produce gas phase HONO at mixing ratios half that of NOx mixing ratio produced in the same experiment at typical temperatures encountered at Concordia in summer. Using these lab data and the emission flux of NOx from snow estimated from the vertical gradient of atmospheric concentrations measured during the campaign, a mean diurnal HONO snow emission ranging between 0.5 and 0.8×109 moleculescm-2 s-1 is calculated. Model calculations indicate that, in addition to around 1.2 pptv of HONO produced by the NO oxidation, these HONO snow emissions can only explain 6.5 to 10.5 pptv of HONO in the atmosphere at Concordia. To explain the difference between observed and simulated HONO mixing ratios, tests were done both in the field and at lab to explore the possibility that the presence of HNO4 had biased the measurements of HONO.  
  Programme 903  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1680-7375 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5195  
Permanent link to this record
 
 
Author Kukui A, Legrand M, Preunkert S, Frey M M, Loisil R, Gil Roca J, Jourdain B, King M D, France J L, Ancellet G, doi  openurl
  Title Measurements of OH and RO2 radicals at Dome C, East Antarctica Type Journal Article
  Year 2014 Publication Atmos. Chem. Phys. Discuss. Abbreviated Journal  
  Volume 14 Issue 10 Pages 14999-15044  
  Keywords  
  Abstract Concentrations of OH radicals and the sum of peroxy radicals, RO2, were measured in the boundary layer for the first time on the East Antarctic Plateau at the Concordia Station (Dome C, 75.10 S, 123.31 E) during the austral summer 2011/2012. The median concentrations of OH and RO2 radicals were 3.1×106 molecule cm-3 and 9.9×107 molecule cm-3, respectively. These values are comparable to those observed at the South Pole, confirming that the elevated oxidative capacity of the Antarctic atmospheric boundary layer found at the South Pole is not restricted to the South Pole but common over the high Antarctic plateau. At Concordia, the concentration of radicals showed distinct diurnal profiles with the median maximum of 5.2×106 molecule cm-3 at 11:00 and the median minimum of 1.1×106 molecule cm-3 at 01:00 for OH radicals and 1.7×108 molecule cm-3 and 2.5×107 molecule cm-3 for RO2 radicals at 13:00 and 23:00, respectively (all times are local times). Concurrent measurements of O3, HONO, NO, NO2, HCHO and H2O2 demonstrated that the major primary source of OH and RO2 radicals at Dome C was the photolysis of HONO, HCHO and H2O2, with the photolysis of HONO contributing _ 75% of total primary radical production. However, photochemical modelling with accounting for all these radical sources overestimates the concentrations of OH and RO2 radicals by a factor of 2 compared to field observations. Neglecting the OH production from HONO in the photochemical modelling results in an underestimation of the concentrations of OH and RO2 radicals by a factor of 2. To explain the observations of radicals in this case an additional source of OH equivalent to about 25% of measured photolysis of HONO is required. Even with a factor of 4 reduction in the concentrations of HONO, the photolysis of HONO represents the major primary radical source at Dome C. Another major factor leading to the large concentration of OH radicals measured at Dome C was large concentrations of NO molecules and fast recycling of peroxy radicals to OH radicals.  
  Programme 903  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Copernicus Publications Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1680-7375 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 5184  
Permanent link to this record
Select All    Deselect All [61–70] << 71 72 73 74 75 76 77 78 79 80 >> [81–90]
List View
 | 
Citations
 | 
Details
   print
toggle visibility Cite Options
Home Show Record  |  Help