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Transcript
Impacts of Climate Change on
Water Resources in Idaho
Prepared by Zion Klos
PhD Student,
College of Natural Resources
[email protected]
920-883-8617
…feel free to e-mail or call me with questions!
Idaho’s climate is changing…
NCDC
Outline
• Observed (historic) and/or future predictions
for changes in:
– Precipitation
– Snowpack
– Streamflow
– Stream temperature
– Drought
Observed Precipitation Changes
NCDC
Precipitation Intensity
Analysis by Troy Magney
Precipitation: Future Predictions
Precipitation:
2090 - 2099
vs.
1990 - 1999
Salathé Jr, E P, R Steed, C F Mass, and P
H Zahn. "A High-Resolution Climate
Model for the US Pacific Northwest:
Mesoscale Feedbacks and Local
Responses to Climate Change." Journal
of Climate 21, no. 21 (2008):
doi:10.1175/2008JCLI2090.1.
Outline
• Observed (historic) and/or future predictions
for changes in:
– Precipitation
– Snowpack
– Streamflow
– Stream temperature
– Drought
Observed Snowpack Changes
NCDC
April 1st
Snowpack
1950-1997
= decrease
= increase
Mote et al., 2005. Declining
mountain snowpack in western
N. America. Bull. Am. Met.
Soc.
Benton Spring Snow Course
elev. 1500 m (4920 ft)
Analysis by Ryan Niemeyer
Future
Predictions for
Snow vs. Rain
Future
Predictions
for Snow
vs. Rain
Outline
• Observed (historic) and/or future predictions
for changes in:
– Precipitation
– Snowpack
– Streamflow
– Stream temperature
– Drought
Statewide Streamflow Trends
Unregulated streams with at
least 40 years of continuous
stream discharge information
- 25 stations (as of FY06)
Source of Funding
State/Federal COOP – 9
Corp of Engineers – 6
USGS NSIP – 4
Other Funding – 6
Discontinued in FY05 – 1
Courtesy of
Greg Clark
(USGS)
Statewide Streamflow Trends
USGS
Onset of Streamflow
Stewart, I T, D R Cayan,
and M D Dettinger.
"Changes Toward
Earlier Streamflow
Timing Across Western
North America." Journal
of Climate 18, no. 8
(2005): 1136-1155.
Midpoint of Annual
Streamflow Runoff
Earlier by 0-4 days (18 sites)
Earlier by 5-9 days (6 sites)
Earlier by 10 days or more (2 sites)
Based on average
pre- and post-1980
data
Courtesy of
Greg Clark
(USGS)
Outline
• Observed (historic) and/or future predictions
for changes in:
– Precipitation
– Snowpack
– Streamflow
– Stream temperature
– Drought
Stream Temperature
Analysis by Stephen Gillis
Outline
• Observed (historic) and/or future predictions
for changes in:
– Precipitation
– Snowpack
– Streamflow
– Stream temperature
– Drought
Drought:
conceptualized through the
Climatic Water Balance
Anyways, hope you’ll find this
information useful!
Also, apologies if it’s too much doom
and gloom… But hey, who doesn't
love some nice, warm weather!