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The Changing Importance of Winter Rains to Annual Precipitation Totals in Florida.
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The Changing Importance of Winter Rains to Annual Precipitation Totals in Florida. Peter Waylen and Youliang Qiu
description
The Changing Importance of Winter Rains to Annual Precipitation Totals in Florida. Peter Waylen and Youliang Qiu. SANTA FE RIVER near Fort White. (1627 sq.km) High Springs Precipitation. 1949 -1986. 1. Input = Output Precipitation = Runoff +/- Evap. - PowerPoint PPT Presentation
Transcript of The Changing Importance of Winter Rains to Annual Precipitation Totals in Florida.
The Changing Importance of Winter Rains to Annual Precipitation Totals
in Florida.Peter Waylen
andYouliang Qiu
SANTA FE RIVER nearFort White. (1627 sq.km)
High Springs Precipitation.1949 -1986
Input = OutputPrecipitation = Runoff +/- Evap. +/- ΔStorageP - R = (E +/- ΔS +/- ΔGw)
Seasonal Evapo-Transpiration rates
Dry = CoolE declines
Dry = WarmE increases
Month
Pre
cip.
and
Run
off (
mm
)
50
100
150
200
250
50
100
150
200
250Mean Monthly PrecipMean Monthly Runoff
E EE
Summer
Winter Winter
1
2
-88 -87 -86 -85 -84 -83 -82 -81 -8025
26
27
28
29
30
31
Historic RecordsGridded Centroid
MONTHLY PRECIPITATION DATA SETS
1/8th° Gridded-data set 1949 -2000www.hydro.washington.edu/Lettenmaier/Data/GriddedMaurer, E.P., A.W. Wood, J.C. Adam, D.P. Lettenmaier, and B. Nijssen, 2002, A Long-Term Hydrologically-Based Data Set of Land Surface Fluxes and States for the Conterminous United States.J. Climate 15, 3237-3251.
National Climate Data Center 1900 - 2000
TarponSprings
St. Leo
Bartow
FortMyers
Ocala
Federal Point
JacksonvilleTallahassee
Appalachicola
Pensacola
150.00
250.00
350.00
450.00
550.00
650.00
750.00
850.00
950.00
1050.00
1150.00
1250.00
1350.00
10000.00
250
500
750
1000
1250
Mean SummerPrecipitation (mm)
Mean WinterPrecipitation (mm)
Northwest2:1
South6:1
(mm)
1 0
1 3
1 5
1 8
2 0
2 3
2 5
2 8
3 0
3 5
5 0 0
1 0
1 5
2 0
2 5
3 0
5 0 0
PERCENTAGE OF MEAN ANNUALPRECIPITATION OCCURRING
IN WINTER.1949 - 2000
Escambia R.
Santa Fe R.
Blackwater Crk.
Fisheating Crk..Selected Streamflow Sites
Calendar Month
1 2 3 4 5 6 7 8 9 10 11 12
Per
cent
age
of M
ean
Ann
ual F
low
0
5
10
15
20
25
0
5
10
15
20
25Escambia R.Santa Fe R.Blackwater Crk.Fisheating Crk.
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in Sum m er TotalsG ridded Data (1949-2000).
-8.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
Slope (m
m/yr)
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in Sum m er Tota lsG ridded Data (1949-2000).
-8.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
Slope (m
m/yr)
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in Sum m er Tota lsG ridded Data (1949-2000).
-8 .0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
Slope (m
m/yr)
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in W interTota lsG ridded Data (1949-2000).
-8 .0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
Slope (m
m/yr)
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in W interTota lsG ridded Data (1949-2000).
-8.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
Slope (m
m/yr)
Significance
0.10
0.05
0.01
LINEAR TRENDS INSEASONAL PRECIPITATION
TOTALS
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in W inter as ProportionG ridded Data (1949-2000).
0.0000
0.0005
0.0010
0.0015
0.0020
0.0025
0.0030
0.0035
0.0040
Slope (proportion/yr)
-88 -87 -86 -85 -84 -83 -82 -81 -80
-88 -87 -86 -85 -84 -83 -82 -81 -80
25
26
27
28
29
30
31
25
26
27
28
29
30
31
Linear Trends in W inter as P roportionG ridded Data (1949-2000).
0.0000
0.0005
0.0010
0.0015
0.0020
0.0025
0.0030
0.0035
0.0040
Slope (proportion/yr)
LINEAR TRENDS IN THEPROPORTION OF ANNUAL
PRECIPITATION IN THE WINTER
Significance
0.10
0.05
0.01
-88 -87 -86 -85 -84 -83 -82 -81 -8025
26
27
28
29
30
31
-88 -87 -86 -85 -84 -83 -82 -81 -8025
26
27
28
29
30
31
-88 -87 -86 -85 -84 -83 -82 -81 -8025
26
27
28
29
30
31
COLD PHASE ENSO
NEUTRAL PHASE ENSO
WARM PHASE ENSO
Proportion of annual precipitation duringwinter under variousENSO phases.
Gridded data
-88 -87 -86 -85 -84 -83 -82 -81 -8025
26
27
28
29
30
31
Differences in Proportionof annual precipitation
During winterWarm phase - Cold phases.
Gridded data
APPALACHICOLA1900 - 2000
Ocala
Fort MyersSt. Leo
Cold 11.8, 4.3Neutral 17.4, 6.6Warm 25.9, 9.7
Cold 18.1, 6.3Neutral 26.5, 7.5Warm 35.0, 9.1
Bartow
Cold 17.3, 5.2Neutral 25.1, 7.9Warm 31.3, 7.3
Cold 22.1, 6.6Neutral 29.3, 7.4Warm 35.3, 8.0
Acknowledgements
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Pensacola
Cold 32.8, 8.1Neutral 37.1, 8.0Warm 42.9, 7.2
Tallahassee
Tarpon Springs Jacksonville
Cold 22.0, 5.7Neutral 29.1, 8.2Warm 36.4, 8.3
Cold 18.3, 6.4Neutral 26.7, 7.3Warm 35.5, 9.8
