Mike Goulden UC Irvine (mgoulden@uci.edu) Ill talk about two - - PowerPoint PPT Presentation

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Mike Goulden UC Irvine (mgoulden@uci.edu) Ill talk about two - - PowerPoint PPT Presentation

Dec 06, 2022 287 likes •417 views

Mike Goulden UC Irvine (mgoulden@uci.edu) Ill 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)

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Mike Goulden UC Irvine (mgoulden@uci.edu)

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

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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”