[1
]Cooperative Institute for Research in Environmental Sciences; University of Colorado
Boulder; Boulder Colorado USA
[2
]Department of Atmospheric and Oceanic Sciences; University of Colorado Boulder; Boulder
Colorado USA
[3
]Antarctic Meteorological Research Center, Space Science and Engineering Center; University
of Wisconsin-Madison; Madison Wisconsin USA
[4
]Department of Physical Sciences, School of Arts and Sciences; Madison Area Technical
College; Madison Wisconsin USA