@article{TEXTUAL,
      recid = {13799},
      author = {Obbard, Rachel W. and Lieb-Lappen, Ross and Nordick,  Katherine V. and Golden, Ellyn J. and Leonard, Jeremiah R.  and Lanzirotti, Antonio and Newville, Mathew G.},
      title = {Synchrotron X-ray fluorescence spectroscopy of salts in  natural sea ice},
      journal = {Earth and Space Science},
      address = {2016-10-23},
      number = {TEXTUAL},
      abstract = {We describe the use of synchrotron-based X-ray  fluorescence spectroscopy to examine the microstructural  location of specific elements, primarily salts, in sea ice.  This work was part of an investigation of the location of  bromine in the sea ice-snowpack-blowing snow system, where  it plays a part in the heterogeneous chemistry that  contributes to tropospheric ozone depletion episodes. We  analyzed samples at beamline 13-ID-E of the Advanced Photon  Source at Argonne National Laboratory. Using an 18 keV  incident energy beam, we produced elemental maps of salts  for sea ice samples from the Ross Sea, Antarctica. The  distribution of salts in sea ice depends on ice type. In  our columnar ice samples, Br was located in parallel lines  spaced roughly 0.5 mm apart, corresponding to the spacing  of lamellae in the skeletal region during initial ice  growth. The maps revealed concentrations of Br in linear  features in samples from all but the topmost and bottommost  depths. For those samples, the maps revealed rounded  features. Calibration of the Br elemental maps showed bulk  concentrations to be 5–10 g/m<sup>3</sup>, with  concentrations ten times larger in the linear features.  Through comparison with horizontal thin sections, we could  verify that these linear features were brine sheets or  layers.},
      url = {http://knowledge.uchicago.edu/record/13799},
}