4th Annual Riverside County Water Symposium Global Warming, Longterm Drought, Climate Change The Fut

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4th Annual Riverside County Water
SymposiumGlobal Warming, Long-term Drought,
Climate Change The Future Aint What It Used To
Be!Think Globally, Plan Neighborly!

• Bill Patzert, Climatologist
• Jet Propulsion Laboratory
• 21 June 2007

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Breaking News! Since 1 July 2006 3.21 Rain in
LA Dry, drier, driest!
December 28, 2004 5.55 Rain at USC
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LA Dry
LA Dry
LA Wet
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PACIFIC DECADAL OSCILLATION A Fish Story 10 -
20 Year Climate Salmon Variations
April 2001 image (at left) shows the Pacific
Decadal Oscillation pattern that has persisted
for the past six years. The warm water (shown
as high sea levels in red and white) can be seen
in the north, west and South Pacific, and cooler
water (lower sea levels in blue) can be seen
spreading from the coast of the Americas out into
the tropical Pacific.
LA Wet!
LA Dry!
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Mean 15.1
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East is Wet West is dry
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Death Valley
JPL/Pasadena 35/23 per year
JPL
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Crescent City
Redwood Empire
Cape Mendocino
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Yes, The Home Planet Is Warming Up!
Netflix An Inconvenient Truth
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Downtown Los Angeles Monthly Temperature Trends
(1878 to 2006) for Night Min Day Max)
night (min) temp trends
night (min) - day (max) temp trend
differencesdecrease is max in late-spring,
summer falldecrease is min in winter (Dec,
Jan, Mar Apr)
Degrees F
day (max) temp trends
Months
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Los Angeles Hot Cold Temperature Occurrences
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Average Daily Temperatures Rates of
Change/Decade (1950 - 2000)
International Climate Journal Recent
California Climate Variability Bill Patzert
(JPL) Steve LaDochy (Cal State LA) Richard Medina
(Univ. of Utah) 331 Meteorological
Stations! Urban, Suburban Agricultural Regions
Warming Faster! Its Population Agricultural
Sprawl
1.0 - 1.2 0.8 - 1.0 0.6 - 0.8 0.4 - 0.6
0.2 - 0.4 0 - 0.2 No Change -0 -
-0.2 -0.2 - -0.4
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In California Warming Due To Land Use And
Greenhouse Gas Global Warming
California Temperature Changes (F) 1950 - 2000
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6X 4X 2X
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Negative PDO
Whats Up Now?
La Niña Lite Demon Diva of Drought SoCal Dry
2007- 2008 Rain Forecast? La Nina Lite
Negative PDO
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Preview of Summer Attractions!
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Think Globally, Act Neighborly

• We All Share Our Changing Atmosphere
• - Globally, We are Living in a Warmer World
• - Regionally/Locally, Warming Ourselves
  2-3ºF/50 years
• Water Supplies Threatened - Little Rain,
  Shrinking Snowpack, Receding Colorado River
• Guaranteed Continued Population Expansion!
• Water Managers Need 50 Year Long-Range Plan
• - Capture More Local Rain Protect Local
  Groundwater
• - Anticipate Shrinking Imported Water
• - Implement Regional Water Conservation Plans
• Imperative to Work With Community and Business
  Leaders, Environmental Groups, Scientists
  Legislators
• CA Legislature Considering 60 Global Warming
  Related Bills
• Water Availability Depends on (Changing)
  Climate, (Increasing) Population (More Costly)
  Energy

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HOW YOU VOTE IS AS IMPORTANTAS DRIVING A PRIUS
PLANTING A TREEOR SHORT SHOWERS Thanks for the
invitation!