Surface and porewater chemistry and sulfur stable isotpes for alpine and subalpine wetland sites, 2021.

To understand patterns in aqueous biogeochemistry of wetlands at
Niwot Ridge, samples were collected and analyzed for dissolved
anions and stable isotopes of sulfur in 2021. Samples were collected
from eight wetland sites representing three wetland types, from the
Saddle into the subalpine. At each site, tension lysimeters were
placed at visible surface inflow and outflow paths to collect
porewater. Water samples were collected from the tension lysimeters
and surface pools during four time points through the summer season.
Water samples were measured for a suite of dissolved anions using
ion chromatography, including dissolved chloride, nitrate, and
sulfate. Samples were also measured for dissolved organic carbon.
Sulfur from one surface water sample from each site at each time
point was precipitated as barium sulfate, and precipitations were
analyzed for stable sulfur isotope ratio (δ^34S-SO4^2-) at the
Center for Stable Isotope Biogeochemistry at the University of
California, Berkeley. Data was used in conjunction with soil
biogeochemistry data from 2020 to evaluate patterns in reactants
among wetland types.