Results 61 to 70 of about 27,505 (199)

A 60 yr record of atmospheric carbon monoxide reconstructed from Greenland firn air [PDF]

, 2012
We present the first reconstruction of the Northern Hemisphere (NH) high latitude atmospheric carbon monoxide (CO) mole fraction from Greenland firn air.
Battle, M. O., Blunier, T., Chappellaz, J., Etheridge, D. M., Forster, G., Hammer, S., Kaiser, J., Lamarque, J.-F., Lang, P., Langenfelds, R. L., Levin, I., Mak, J., Martinerie, P., Novelli, P., Petrenko, V. V., Petron, G., Schwander, J., Severinghaus, J. P., Steele, L. P., Steffen, K., Sturges, W. T., Wang, Z., White, J. W. C., Witrant, E.   +23 more
core   +5 more sources

Evolving ice fraction in the shallow firn layer of Devon Ice Cap, Canada, between 2012 and 2022

Journal of Glaciology
Firn can store glacial meltwater and delay contribution to sea level rise, but ice layers and ice slabs within the shallow firn layer can impede the downward percolation of melt. Here we report firn conditions along a transect on southwest Devon Ice Cap (
Danielle Hallé, Wesley Van Wychen, David Burgess, Bradley Danielson, Richard Kelly, Madeline Myers, Brice Noël, Peter Bezeau, Luke Copland   +8 more
doaj   +1 more source

CHALLENGES OF QUANTIFYING MELTWATER RETENTION IN SNOW AND FIRN: AN EXPERT ELICITATION

Frontiers in Earth Science, 2016
Thirty-four experts took part in a survey of the most important and challenging topics in the field of meltwater retention in snow and firn, to reveal those topics that present the largest potential for scientific advancement.
Dirk van As, Jason Eric Box, Robert Schjøtt Fausto   +2 more
doaj   +1 more source

Carbon Isotope Constraints on the Deglacial CO2 Rise from Ice Cores [PDF]

, 2012
The stable carbon isotope ratio of atmospheric CO2 (d13Catm) is a key parameter in deciphering past carbon cycle changes. Here we present d13Catm data for the past 24,000 years derived from three independent records from two Antarctic ice cores.
Chappellaz, J., Elsig, J., Fischer, Hubertus, Joos, F., Köhler, P., Leuenberger, D., Leuenberger, M., Lourantou, A., Schmitt, Jochen, Schneider, R., Stocker, T. F.   +10 more
core   +1 more source

How does the local wind field control the aerosol distribution in coastal Dronning Maud Land? [PDF]

, 2011
Atmospheric circulation patterns and chemical concentrations in firn cores are highly related to each other. Atmospheric winds transport aerosols like sea salt and mineral dust over the globe and redistribute them.
Bigler, M., Fischer, Hubertus, Schmidt, Katrin, Wegner, Anna, Weller, Rolf   +4 more
core  

Relationship between continuous aerosol measurements and firn core chemistry over a 10-year period at the South Pole [PDF]

, 1998
Before ice core chemistry can be used to estimate past atmospheric chemistry it is necessary to establish an unambiguous link between concentrations of chemical species in the air and snow.
Bergin, M H, Dibb, Jack E., Mayewski, Paul A, Meyerson, E A   +3 more
core   +2 more sources

Investigations of meltwater refreezing and density variations in the snowpack and firn within the percolation zone of the Greenland Ice Sheet [PDF]

, 2007
The mass balance of polythermal ice masses is critically dependent on the proportion of surface-generated meltwater that subsequently refreezes in the snowpack and firn.
Hubbard, B., Mair, D., Nienow, Peter, Parry, V., Scott, J., Steffen, K., Wingham, D.   +6 more
core   +1 more source

Exploring the value of Scotland's environment [PDF]

, 2003
Protection of the environment can be regarded as representing a substantial cost to business. However, it is typically considered from the point of view of effect on company profitability, rather than its relative importance to human kind.
Firn, J., Kind, V., McGlashan, D., Roberts, M., Williams, Evan   +4 more
core  

Snow accumulation, firn temperature and solar radiation in the area of the Colle Gnifetti core drilling site (Monte Rosa, Swiss Alps): Distribution patterns and interrelationships [PDF]

, 1983
Distributional patterns of glaciological parameters at the Colle Gnifetti core drilling site are described and their interrelationships are brietly discussed.
Alean, Jürg, Haeberli, Wilfried, Schädler, Bruno   +2 more
core  

Accelerating growth of HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane) in the atmosphere [PDF]

, 2010
We report the first measurements of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), a substitute for ozone depleting compounds, in air samples originating from remote regions of the atmosphere and present evidence for its accelerating growth.
Blunier, T, Bolder, M, Brenninkmeijer, CAM, Bönisch, H, Engel, A, Laube, JC, Martinerie, P, Mills, GP, Newland, MJ, Oram, DE, Reeves, CE, Röckmann, T, Schuck, TJ, Schwander, J, Sturges, WT, van der Veen, C, Witrant, E   +16 more
core   +5 more sources