QUANTIFYING UNCERTAINTY IN ECOSYSTEM STUDIES Ruth Yanai, Carrie Rose Levine, Craig See (SUNY-ESF) John Campbell, Mark Green (USFS and PSU) Amey Bailey,

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QUANTIFYING UNCERTAINTY IN ECOSYSTEM STUDIES Ruth Yanai, Carrie Rose Levine, Craig See (SUNY-ESF) John Campbell, Mark Green (USFS and PSU) Amey Bailey, Stephanie Laseter (USFS)

20 collectors across SEV from Solutes: NO3, NH4, SO4, Cl, Na, K, Ca, Mg, and PO4 Collections monthly or after heavy rains Gaps in the Precipitation Record at Sevilleta

Gaps in the Streamflow Record Hubbard Brook Coweeta

Gaps in the Streamflow Record (days) Hubbard Brook Coweeta

Uncertainty in change over time in sulfate in atmospheric deposition in NY as a function of sampling intensity (21 stations = 100%)

Uncertainty in change over time in Adirondack lake nitrate as a function of sampling intensity (50 lakes monthly = 100%)

Uncertainty in Forest Biomass in W6 as a function of the number of plots sampled

Uncertainty in Change over Time in Forest Biomass in W6

Variation over space and time in stream loads at Hubbard Brook, Coweeta, and Wakayama (Japan)