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Research: Arctic Climate and Hydrology
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| The hydroclimatology
of the
Arctic plays an important role in the global
climate system because the amount of freshwater in the Arctic Ocean
(which
primarily comes from river discharge) influences the thermohaline
circulation.
During the last two years I have been working with Dr. David Legates to
develop a bias-adjusted Arctic precipitation database. This
research
addresses the known systematic biases in gauge-measured precipitation
in
the high latitudes. Gauge-based measurements of Arctic
precipitation
substantially underestimate true precipitation. The main sources
of systematic bias include wind-induced undercatch, wetting loss, and
evaporative
loss. In addition, trace amounts of precipitation are not counted
in daily precipitation totals even though they can contribute
significantly
to precipitation in arid locations in the Arctic. The goal of
this
research is to provide accurate precipitation data so that runoff from
Arctic watersheds and the global water balance can be more
realistically
simulated. We are currently preparing a number of papers that
summarize
the results of this research. The following links provide more information on this research: |
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I have also been working with Dr. Tim Papakyriakou on a study that examines how atmospheric circulation affects the surface energy budget of the Canadian Arctic. I developed an upper level synoptic classification to classify atmospheric circulation over the Canadian Arctic Archipelago. The data will be used to explain the causes of temporal variation in the surface energy balance at Resolute Bay, NU (74º 49’N, 94º 59’W) during the late winter/spring of 1991–1995. This study will help to explain how large scale atmospheric processes, such as the Arctic Oscillation, affect the surface energy balance and sea-ice concentrations. |