growing ice; microinclusions; microanalysis; ice core; stable isotopes; solid solution; snow chemistry; Antarctica; Polar; cryosphere; Dust; uptake; non-equilibrium; Alpine glaciers; metamorphism; Halogen; Ozone; sea-salt
Bergmann Melanie, Mützel Sophia, Primpke Sebastian, Tekman Mine B., Trachsel Jürg, Gerdts Gunnar (2019), White and wonderful? Microplastics prevail in snow from the Alps to the Arctic, in Science Advances
, 5(8), eaax1157-eaax1157.
Trachsel Jürg C., Avak Sven E., Edebeli Jacinta, Schneebeli Martin, Bartels-Rausch Thorsten, Bruetsch Sabina, Eichler Anja (2019), Microscale Rearrangement of Ammonium Induced by Snow Metamorphism, in Frontiers in Earth Science
, 7, 194.
Avak Sven E., Trachsel Jürg C., Edebeli Jacinta, Brütsch Sabina, Bartels‐Rausch Thorsten, Schneebeli Martin, Schwikowski Margit, Eichler Anja (2019), Melt‐Induced Fractionation of Major Ions and Trace Elements in an Alpine Snowpack, in Journal of Geophysical Research: Earth Surface
, 124(7), 1647-1657.
Chen Qianjie, Edebeli Jacinta, McNamara Stephen M., Kulju Kathryn D., May Nathaniel W., Bertman Steven B., Thanekar Sham, Fuentes Jose D., Pratt Kerri A. (2019), HONO, Particulate Nitrite, and Snow Nitrite at a Midlatitude Urban Site during Wintertime, in ACS Earth and Space Chemistry
, 3(5), 811-822.
Edebeli Jacinta, Ammann Markus, Bartels-Rausch Thorsten (2019), Microphysics of the aqueous bulk counters the water activity driven rate acceleration of bromide oxidation by ozone from 289–245 K, in Environmental Science: Processes & Impacts
, 21(1), 63-73.
Avak Sven Erik, Schwikowski Margit, Eichler Anja (2018), Impact and implications of meltwater percolation on trace element records observed in a high-Alpine ice core, in Journal of Glaciology
, 64(248), 877-886.
Artiglia Luca, Edebeli Jacinta, Orlando Fabrizio, Chen Shuzhen, Lee Ming-Tao, Corral Arroyo Pablo, Gilgen Anina, Bartels-Rausch Thorsten, Kleibert Armin, Vazdar Mario, Andres Carignano Marcelo, Francisco Joseph S., Shepson Paul B., Gladich Ivan, Ammann Markus (2017), A surface-stabilized ozonide triggers bromide oxidation at the aqueous solution-vapour interface, in Nature Communications
, 8(1), 700-700.
Weissfluhjoch, Swiss Alps 2017 Snowpit Major Ions and Trace Element Data
Major ions and trace elements data from 5 snow pits at the Weissfluhjoch, Switzerland. Snow pits were taken on the following dates in 2017: 25 January, 22 February, 21 March, 17 April, and 1 June. Concentration values are given for the different depths of the 5 snow pits.
Grenzgletscher, Swiss Alps, Ice Core Trace Element Concentration Data 1980-1994
35 trace elements were measured in a 50 m segment of an ice core from upperGrenzgletscher, Switzerland covering the period 1980-1994. An inflow of meltwater disturbed the concentration records of selected trace elements in the period 1985-1989. Concentration values are given in monthly resolution.No data are available for the period 1982.42-1982.50 and 1991.25-1991.67.
Microphysics of the aqueous bulk counters the water activity driven rate acceleration of bromide oxidation by ozone from 289–245 K
||Edebeli, Jacinta; Ammann, Markus; Bartels-Rausch, Thorsten
|Persistent Identifier (PID)
Microphysics of the aqueous bulk counters rate acceleration of bromide oxidation by ozone at low temperatures.
Earth’s surface snow plays an active part in shaping Earth’s geochemical cycles (Bartels-Rausch 2012; Bartels-Rausch 2013; Grannas 2013). Research over the past decades has provided an impressive observational basis for the resulting large scale effects, such as substantial modification of the composition and of the chemical reactivity of the lowermost atmosphere in polar regions (Domine 2002; Simpson 2007; Abbatt 2012) and the ability of toxins to enter the marine food web (Wania 1998; Steffen 2008; Durnford 2011; Grannas 2013). Despite intensive research over the last decades in the field, in the laboratory, and using computer simulations (Abbatt 2013), our understanding of the underlying molecular processes is limited and sound predictions of chemical reactivity in surface snow can still not be given (Grannas 2007; Simpson 2007; Steffen 2008; Abbatt 2012; Bartels-Rausch 2012; McNeill 2012; Bartels-Rausch 2013; Domine 2013). A crucial limitation has been identified in the lag of well-defined snow samples for laboratory based process studies that allow both deriving precise kinetic data and extrapolation of the results to environmental settings (Bartels-Rausch 2014). Cold polar and alpine glaciers or ice sheets preserve the atmospheric composition from times long before the anthropogenic influence began. Past changes of climate, of air pollution, and of atmospheric transport mechanisms have been reconstructed from ice core records of water stable isotopes and from impurity concentrations - major and trace elements (Legrand 1997; Eichler 2012; Thompson 2013). These reconstructions rely on the implicit assumption that the snow composition is perfectly preserved in ice cores. This, however, is clearly not the case in low accumulation areas, such as East Antarctica. Further, due to current global warming, post-depositional relocation of impurities caused by the occurrence of melt water will increasingly disturb geochemical and stable water isotope records. The preservation of impurities within these poly-thermal glaciers depends on whether the impurities are located at grain boundaries or embedded into the matrix of the snow or firn grains, protecting them from alterations by melt water (Eichler 2001). Yet, we currently lack the possibility to map the distribution of impurities in glacial ice cores or and in snow. The mechanisms of how impurities may enter the ice phase are not clear, too. The location of impurities in and the stable isotope fractionation of snow is a complex function of changes that occur after deposition (Legrand 1997; Harder 2000; Röthlisberger 2000; Beine 2002; Röthlisberger 2002; Domine 2004; Blunier 2005; Jacobi 2012). Process studies have shown that dry metamorphism leads to substantial sublimation and deposition events of the ice phase (Pinzer 2009; Pinzer 2012). Water vapour fluxes have a dominant effect on the stable isotope fractionation in snow and on the uptake of trace gases. However, the fate of impurities during snow metamorphism has not been investigated as well as the fractionation and migration of stable water isotopes. This is surprising as the substantial impact of snow metamorphism on physical processes such as heat transfer, avalanche formation, and on snow-atmosphere fluxes of trace gases has long been recognized (Schweizer 2010).We therefore propose detailed process studies in well-controlled laboratory based experiments on the impact of metamorphism on impurity location and on stable isotope fractionation. What makes this proposal unique is the development of snow samples doped with known amounts of impurities that perfectly mimic natural snow and of a locally resolved analysis of the chemical composition of ice and snow with an unprecedented resolution and sensitivity.