Coastal Groundwater Dynamics and Its Derived Chemical Fluxes

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312).

Deadline for manuscript submissions: closed (30 April 2016) | Viewed by 4668

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School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA
Interests: nearshore transport processes; coastal groundwater hydrology; coastal sedimentation; marine geophysics
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Special Issue Information

Dear Colleagues,

Understanding the linkages between coastal groundwater and the ocean, lakes and rivers is essential, not only for the sustainable management of regional water resources, but also for the development of global material fluxes. The quantity, distribution and composition of inputs depends on the particular groundwater pathways. Assessment is confounded, however, by the variety of processes that drive groundwater flow, the wide range of scales involved and the diversity of settings. Coastal groundwater seepage may be driven by terrestrial hydraulic gradients, wave action, currents, seiching, tidal changes, density variations, etc. Geological settings range across deltas, lakes, islands, karst, coastal plains, volcanic terrains permafrost and urban environments, and scales from nearshore (0 to 10 M), to local (10 m–10 km), to regional (>10 km) and global. Nevertheless, understanding must be distilled from a broad spectrum of site-specific and process-specific studies.

This Special Issue is dedicated to putting forward new results, interpretations and methods needed to advance our global understanding of coastal groundwater dynamics and chemical cycles.

Prof. Dr. Henry J. Bokuniewicz
Guest Editor

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Keywords

  • submarine groundwater discharge
  • coastal groundwater quality
  • modeling and remote sensing
  • land-use
  • extreme events
  • climate change
  • nutrient loading
  • thermal effects
  • solute transport
  • transformations

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Published Papers (1 paper)

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Article
Controls on Nitrous Oxide Production in, and Fluxes from a Coastal Aquifer in Long Island, NY, USA
by Caitlin Young, Jonathan B. Martin and Gilbert N. Hanson
J. Mar. Sci. Eng. 2016, 4(4), 71; https://doi.org/10.3390/jmse4040071 - 4 Nov 2016
Cited by 3 | Viewed by 4175
Abstract
Nitrous oxide (N2O) has 265 times greater greenhouse potential than carbon dioxide and its atmospheric concentration has increased by about 20% since industrialization; however, N2O production and emissions from aquatic systems are poorly constrained. To evaluate N2O [...] Read more.
Nitrous oxide (N2O) has 265 times greater greenhouse potential than carbon dioxide and its atmospheric concentration has increased by about 20% since industrialization; however, N2O production and emissions from aquatic systems are poorly constrained. To evaluate N2O fluxes associated with meteoric groundwater discharge to coastal zones, we measured N2O concentrations in May and October 2011 from two discharge points of the Upper Glacial aquifer on Long Island, NY, USA. One coastal zone contains only fresh water and the other contains an upper saline zone. N2O concentrations decreased by around 40% for the fresh water and a factor of two for the salt water from May to October, 2011. Fluxes were around 100 to 200 times greater from the freshwater (246 to 448 µmol/m shoreline/day) than saltwater aquifer (26.1 to 26.5 µmol/m shoreline/day). N2O concentrations correlate positively with NO3 and dissolved oxygen concentrations and negatively with salinity, dissolved organic carbon (DOC) and N2 denitrification concentrations. The smaller saltwater N2O export resulted from DOC enrichment in the upper saline zone, which appears to have driven denitrification to completion, removed N2O, and increased N2 denitrification. DOC concentrations should be considered in global N2O flux estimates for coastal aquifers. Full article
(This article belongs to the Special Issue Coastal Groundwater Dynamics and Its Derived Chemical Fluxes)
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