In downloading this resource contents you are ethically bound to respect the terms of this license.
Please confirm that you accept the terms of this license below before you can do any downloads for this resource.
Resource License Agreement
This resource is shared under the Creative Commons Attribution CC BY.
In downloading this resource contents you are ethically bound to respect the terms of this license.
Please confirm that you accept the terms of this license below before you can do any downloads for this resource.
Please wait for the process to complete.
Redirecting to the referenced web URL
The content you have requested to access is not stored in HydroShare, and we can’t guarantee its availability,
quality, security, or size. If the externally linked content is large, access may take time.
Get file URL
You have requested the URL for a file that is within a Discoverable resource.
This resource has Private Link Sharing enabled.
This means that anyone with the link will be able to access the file,
but users without the link will not be permitted unless they have "view" permission on this resource.
You have requested the URL for a file that is within a Discoverable resource.
Only you and other HydroShare users who have been granted at least "view" permission will be able to access this URL.
If you want this URL to be publicly available,
change the sharing status of your resource to "public" or enable Private Link Sharing.
You have requested the URL for a file that is within a Private resource.
This resource has Private Link Sharing enabled.
This means that anyone with the link will be able to access the file,
but users without the link will not be permitted unless they have "view" permission on this resource.
You have requested the URL for a file that is within a Private resource.
Only you and other HydroShare users who have been granted at least "view" permission will be able to access this URL.
If you want this URL to be publicly available, change the sharing status of your resource to "public" or enable Private Link Sharing.
Choose coordinates
Checking for non-preferred file/folder path names (may take a long time depending on the number of files/folders) ...
The following files/folders contain non-preferred characters in their name.
This may result in problems and you are encouraged to change the name to follow the
HydroShare preferred character set.
Water draining from rock glaciers in the Uinta and La Sal Mountains of Utah (USA) was analyzed and compared with samples of stream water. Samples were collected during the melt season of 2022 using five automated ISCO samplers. Two samplers were installed at springs discharging from the termini of rock glaciers in the Uinta Mountains, and a third at a rock glacier in the La Sal Mountains. A fourth sampler was deployed in the La Sal Mountain downstream from the studied rock glacier. The fifth sampler was deployed in the La Sal Mountains along a stream in a high elevation catchment lacking rock glaciers. Composite samples of summer and fall rain were also collected, as well as grab samples of snow. Samples were analyzed for their stable isotopic composition using a Los Gatos 45-EP Triple Liquid Water Isotope Analyzer at Middlebury College. Samples were run against a bracketing set of 4 standards and calibrated with a cubic spline function. Each sample was analyzed 10 times, with the first 2 injections discarded to minimize cross-over. Accuracy of the instrument is 0.4‰ for δD and 0.1‰ for δ18O. Hydrochemical characterizations were made with a Thermo iCap ICP-MS at Middlebury College. Samples were run against a set of standards derived from NIST Standard Reference Material 1643f “Trace Elements in Water”. An in-house standard was used to determine the abundance of Si and Ti, which are not present in 1643f. The NIST standard and the in-house standards were run after every 10 unknowns and a linear correction was applied to compensate for instrument drift. Interpretation focused on elements that consistently exhibited concentrations >1 ppb. Results support the interpretation that rock glaciers discharge water derived from snowmelt in the early summer, but as the snowpack is exhausted, water derived from the melting of internal ice becomes dominant. This later summer water is distinguished by higher values of δ18O, δD, and d-excess, along with elevated electric conductivity and greater abundances of cations including Ca and Mg. The pattern of shifting water sources in 2022 was nearly identical to that noted at the same Uinta Mountain rock glaciers in 2021, indicating that the system is consistent from year to year. Values of EC and hydrochemical parameters are similar for the two Uinta sites and the rock glacier-influenced sites in the La Sal Mountains, but are strikingly different between the two mountain ranges. This discrepancy is attributed to the dominance of quartzite bedrock in the Uintas versus igneous trachyte in the La Sals. Finally, the three sites considered in the La Sals reveal that the hydrochemical characteristics of rock glacier meltwater are transmitted downstream along the main drainage in a watershed containing rock glaciers, establishing notable contrasts in stream water chemistry with a nearby drainage lacking rock glaciers. Collectively, the results of this study underscore the significant role played by rock glaciers in controlling the hydrochemistry of high-elevation watersheds, and provide further motivation to better understand these features as they rapidly adjust to changing climatic conditions in mountain environments.
This resource contains links to external content. Linked content is
NOT stored in HydroShare, and we can't guarantee its availability, quality, or
security.
Confirm files deletion
This file will be permanently deleted. Consider saving a copy if it is
important to you. If this is the last file in the resource and it is public,
the sharing status will revert to private. If you are not the owner of
this resource, then an owner will need to reset this to public after a new
file has been added. If you want to replace this file, add the new file
first then delete the old one, so that sharing status does not change.
Comments
There are currently no comments
New Comment