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Cape Shores Porewater Data Compilation 2014-2015


Authors: Kyra H. Kim
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Resource type: Composite Resource
Storage: The size of this resource is 874.8 KB
Created: Dec 26, 2018 at 10:23 p.m.
Last updated: Aug 30, 2019 at 3:53 a.m.
DOI: 10.4211/hs.440e89b8cc8c4c43bdbc6176e8f38a70
Citation: See how to cite this resource
Sharing Status: Published
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Abstract

Biogeochemical reactions within intertidal zones of coastal aquifers, induced by the mixing between fresh groundwater and saline seawater, have been shown to alter the concentrations of terrestrial solutes prior to their coastal discharge. In organic-poor sandy aquifers, the input of marine organic matter from infiltrating seawater has been attributed to active biogeochemical reactions within the sediments. However, while the seasonality of surface water organic carbon concentrations (primary production) and groundwater mixing patterns have been well-documented, there has been limited speculation on the contributions of particulate organic carbon pools within the sediments that arise from transient hydrologic conditions. To understand the relationship between physical movements of the circulation cell and the seasonal migration of geochemical patterns, beach porewater and sediment samples from six field sampling events spanning two years were analyzed. While oxygen saturation, oxygen consumption rates, and silica distributions closely followed the seasonally-dynamic salinity, other chemically-reactive parameters (pH, ORP) and nutrient characteristics (N distributions, denitrification rates, reactive organic carbon distributions) were unrelated to contemporaneous salinity patterns. Particulate organic matter was distributed in pools within the aquifer due to the filtration effect of sediments, contributing to the divergence of chemical patterns from salinity patterns via nutrient release and leaching. Together, the results present the asynchronous movement of chemical conditions to salinity patterns due to the divergent transport pathways between solutes and particles arising from transient hydrologic forcing.

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Cape Shores, Lewes, Delaware
Longitude
-75.1039°
Latitude
38.7860°

Temporal

Start Date:
End Date:

Content

References

Related Resources

The content of this resource serves as the data for: Kim, Kyra H., Holly Michael, Erin Field, and William Ullman, 2019, Hydrologic shifts create complex transient distributions of particulate organic carbon and biogeochemical responses in beach aquifers, JGR Biogeosciences

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation Hydrological Control of Particle Entrainment and Nitrogen Cycling in Beach Aquifer Mixing and Reaction Zones EAR-1246554

How to Cite

Kim, K. H. (2019). Cape Shores Porewater Data Compilation 2014-2015, HydroShare, https://doi.org/10.4211/hs.440e89b8cc8c4c43bdbc6176e8f38a70

This resource is shared under the Creative Commons Attribution-NoCommercial-ShareAlike CC BY-NC-SA.

 http://creativecommons.org/licenses/by-nc-sa/4.0/
CC-BY-NC-SA

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