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Windfield and
Trajectory Evaluation |
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HYSPLIT backtrajectories are used extensively
in the Causes of Haze Assessment. We are investigating ways to assess their accuracy
at a
variety of locations within the WRAP region to check
for systematic biases. We are in the process of evaluating the EDAS and FNL wind fields used for
HYSPLIT at several locations throughout the WRAP region. |
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Here we present a summary of
the evaluation. |
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1. Comparison of EDAS and
FNL windfields to measurements (method) |
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Comparison between 80-km EDAS
and rawinsonde during 2002 at 500, 1000 and 1500 meters |
Boise, ID |
Mercury, NV |
Great Falls, MT |
Salem, OR |
San Diego, CA |
Tucson, AZ |
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Comparison between 191-km FNL
and rawinsonde during 2002 at 500, 1000 and 1500 meters |
Cold Bay, AK |
Fairbanks, AK |
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Comparison between 80-km EDAS
and ASOS during 2002 at 10 and 500 meters |
Mercury, NV |
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2. Performance of HYSPLIT
using tracers of opportunity |
We are investigating how HYSPLIT performs during certain events such as
wildfires and
dust storms. |
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3. Sensitivity of
trajectory end points to selection of starting height |
We are investigating the
sensitivity of backtrajectories with various heights |
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Page last edited 24 January 2007
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