Mike Goulden UC Irvine ([email protected]) - SAWPA · 2019. 4. 26. · Mike Goulden UC Irvine...
Transcript of Mike Goulden UC Irvine ([email protected]) - SAWPA · 2019. 4. 26. · Mike Goulden UC Irvine...
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Mike Goulden UC Irvine ([email protected])
I’ll talk about two projects in the Sierra National Forest (above Fresno, near Shaver Lake)
Sierra Nevada Critical Zone Observatory (Sierra CZO) •Funded by NSF •Roger Bales PI (UC Merced) •Basic science (hydrology, ecology, biogeochemistry, climate change) •Lots of high tech measurements – methods development
Kings River Experimental Watershed (KREW) •Funded by USFS •Carolyn Hunsaker PI (USFS PSW Fresno lab) •Effects of montane forest thinning and prescribed fire on water quality and quantity •Less high tech – an excellent experimental design and approach that seems very relevant to what you are discussing •I’m not really involved in KREW but familiar with what they are doing
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Relationships between elevation, climate, and ecosystem properties in the Sierra CZO
Mike Goulden and the Sierra CZO Science Team
Sierra CZO Research focus:
water balance, nutrient cycling & weathering across the rain-snow transition
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Science Questions
• What are spatial and temporal patterns of water balance, biogeochemistry, plant production, etc?
• What physical, chemical, and biological mechanisms control these patterns?
• How might climate change affect water balance, biogeochemistry, plant production, etc?
Methodological Needs
• Approaches to sample spatial and temporal heterogeneity
• Methods that hold up to harsh conditions
• Measure the same thing several ways – close budgets
• Experimental design that addresses climate
Sierra CZO
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infiltration
evapotranspiration
snowmelt
streamflow
sublimation
ground & surface water exchange
precipitation
Unifying theme - Water balance
Sierra CZO Core PIs Roger Bales et al - Mountain
hydrology and biogeochemistry – snow depth, meteorology, etc
Martha Conklin - Groundwater-surface water interactions - meadow hydrology – wells, etc
Steven Glaser - wireless sensor networks for environmental monitoring - 60-node network
Michael Goulden – Terrestrial Ecosystem Ecology- flux tower, etc
Jan Hopmans - Vadose Zone Hydrology- soil moisture, sap flow,
Carolyn Hunsaker - landscape ecology - stream gauges, water-quality, etc
Dale Johnson - Biogeochemical cycling – spatial and temporal N dynamics, etc
Clifford Riebe - geomorphology – rates or erosion, soil formation, et
Christina Tague – coupled hydrology and ecosystem modeling
Sierra CZO
//smb.bren.ucsb.edu/nmolotch/snow/temp_backup/melt_flux_movie.ppt
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600
1200
1800
2400
3000 Elev., m
Experimental design
elevation/climate gradient
Sierra CZO
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2020 m •Midmontane forest •Annual mean T 8.9oC •Winter mean T 3.7oC •Annual P1015mm •130 days w/ snow •Max tree ht 30.1 m •53% Tree cover
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Sierra CZO
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KREW
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KREW
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KREW
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Two thoughts • Effects of treatment of water balance often surprisingly
small and recovery surprisingly fast • High tech instruments are helpful, but a good
experimental design and control are essential More info: Sierra Critical Zone Observatory http://criticalzone.org/sierra/ Second link if you Google: SSCZO
KREW http://www.fs.fed.us/psw/topics/water/kingsriver/ First link if you Google: KREW Hunsaker Several nice pages on right panel “About this Research”