[1
]Department of Atmospheric Science Colorado State University Fort Collins CO USA
[2
]Climate Division Federal Office of Meteorology and Climatology, MeteoSwiss Zurich
Switzerland
[3
]National Snow and Ice Data Center University of Colorado Boulder Boulder CO USA
[4
]Department of Zoology and Environment Sciences University of Colombo Colombo Sri Lanka
[5
]Cooperative Institute for Research in the Atmosphere Colorado State University Fort
Collins CO USA