GAP TOPOGRAPHY

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GAP TOPOGRAPHY
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SEEPAGE/SURGE TYPES
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FT. HUACHUCA, AZ PROFILER 08-July-2002
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Douglas AZ dewpoint temperature 07-08 July 2002
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II. An analysis of mean wind roses during warm-
dry months and cool-wet months in SE Arizona.
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WIND ROSE FOR DOUGLAS, AZ July-August (1973-2002)
GMT
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DOUGLAS, AZ CONTRASTING SURFACE WINDS
(Jul-Aug) WARM/DRY
COOL/WET
25.3ºC / 113mm
27.3ºC / 47mm
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July SLP anomalies (Cool/Wet - Warm/Dry)
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July 700mb Hgt. anomalies (Cool/Wet - Warm/Dry)
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III. Origin of surface moisture entering SE
Arizona A. West (Yuma Gulf Intrusions)
South (Sonoran Valley Intrusions)
Southeast (Rio Grande Intrusions)
B. Surge frequency by month and surge type.
C. Mean daily rainfall during the lifecycle
of a surge event.
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SEEPAGE/SURGE TYPES
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SE ARIZONA Long-Term Rainfall Stations
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High dew point days at Douglas can arise from any
one or combination of the following 1. Air
mass moistening from a local rainfall event.
2. Mesoscale outflow boundaries arriving at the
site. 3. Intensification of surface moisture
advection under a strengthening SLP
gradient. 4. Large scale synoptic
forcing/moistening related to an approaching
easterly wave, tropical cyclone or back door
cold front. Question How are these events
related to local and synoptic
scale forcing?
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IV. Relationships between surge events and
A. Hemispheric climate indices B.
Regional climate indices.
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LARGE-SCALE CLIMATE INDICES
(700 mb.)
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REGIONAL CLIMATE INDICES
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July Surge TYPE 3 (RIO GRANDE) vs. Regional
Climate Indices
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August Surge TYPE 3 (RIO GRANDE) vs. Regional
Climate Indices
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September Surge TYPE 3 (RIO GRANDE) vs. Regional
Climate Indices
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Jul-Sept Surge TYPE 1 (YUMA) vs. Regional
Climate Indices
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Jul-Sept Surge TYPE 2 (SONORAN VALLEY) vs.
Regional Climate Indices
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V. NAME 2004 Events vs the 31 Year Climatology.
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Summer 2004 Climate Indices Expected to
Influence the Frequencyof SE Arizona
Seepage/Surge Events
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Preliminary Analysis of SE Arizona Rainfall for
NAME 2004
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SLP anomalies (Jul-Aug) 2004