Isotopic data and mixing model results of springs and streams in Mount Hood National Forest and Glacier National Park, USA

<p>Alpine glaciers around the world are in retreat, with many estimated to disappear within this century. Existing research concentrates on decoupling alpine glacier meltwater from seasonal surface and shallow subsurface hydrological systems in alpine catchments. This research highlights the importance of meltwater on streamflow generation and aquatic ecosystem integrity by investigating the role of glacier meltwater on mountain-block recharge in Mount Hood National Forest and Glacier National Park.</p>

<p>Samples from various water sources (rain, snow, glacial ice, subglacial melt, proglacial lake, etc.) in alpine regions, as well as regional springs and streams, were collected over multiple field campaigns to Mount Hood National Forest and Glacier National Park and analyzed for stable isotopes (d<sup>18</sup>O and d<sup>2</sup>H). Using stable isotopes in this manner allows for identifying sources and fractional contributions of recharge to mountain groundwater systems. Additionally, samples of the microbes in these water samples were collected and analyzed. The SSU rRNA raw sequence read data have been deposited with links to BioProject accession number PRJNA629965 in the NCBI BioProject database (<a href="https://www.ncbi.nlm.nih.gov/bioproject/">https://www.ncbi.nlm.nih.gov/bioproject/</a>). </p>

<p>Photos and videos of sampling sites can be accessed by the following citation:  Miller, J. B. (2021). <a href="https://doi.org/10.4231/1R4N-RP33" rel="external" target="_blank">Photos and videos documenting spring emergences and sampling locations in and around Mount Hood National Forest and Glacier National Park</a>. Purdue University Research Repository. <a href="https://doi.org/10.4231/1R4N-RP33" rel="external" target="_blank">doi:10.4231/1R4N-RP33</a></p>

<p>Data from these campaigns are reported in a series of tables composing this dataset. A table specifically linking the the hydrological data and microbial data is also part of the dataset. See our publication "Recharge from glacial meltwater is critical for alpine springs and their microbiomes" in Environmental Research Letters for further information regarding methods and study implications.</p>

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