Salinity and Temperature Regimes in Eastern Alaskan Beaufort Sea Lagoons in Relation to Source Water Contributions

Harris, Carolynn; McClelland, J. W.; Connelly, Tara L.; Crump, Byron C.; Dunton, Kenneth H.

doi:10.1007/s12237-016-0123-z

Cited by 27 publications

(47 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Kaktovik Lagoon, water column resistivity values ranging between 0.2 and 0.5 ohm•m during the summer (Figs. 1 and 2) preclude the possibility that porewater near the sediment surface is fresh (16). Furthermore, water temperatures of 10° to 11°C (typical for Beaufort Sea lagoons during summer) cannot support near-surface permafrost (16).…”

Section: Discussionmentioning

confidence: 99%

“…Kaktovik Lagoon is covered with ice that is ~1.7 to 1.8 m thick 9 months of the year. The lagoon freezes down to its bottom only at shore; the rest of the lagoon has unfrozen hypersaline bottom waters during winter (16). The lagoon has an average depth of 2.5 m with a maximum of about ~4 m; many areas of the lagoon have depths ~3 m. The mean annual temperature of the lagoon bottom water varies from 0.36° to 0.43°C (16).…”

Section: Introductionmentioning

confidence: 99%

“…The lagoon freezes down to its bottom only at shore; the rest of the lagoon has unfrozen hypersaline bottom waters during winter (16). The lagoon has an average depth of 2.5 m with a maximum of about ~4 m; many areas of the lagoon have depths ~3 m. The mean annual temperature of the lagoon bottom water varies from 0.36° to 0.43°C (16). The landward shores of Kaktovik Lagoon have narrow sandy beaches, typically a few meters wide, which abut bluffs that vary in height but are typically 1 to 3 m high (see Fig.…”

Section: Introductionmentioning

confidence: 99%

“…This leads to the development of hypersaline conditions within the lagoon. The salty winter water is largely replaced by terrestrial runoff and lagoon ice melt during spring, although hypersaline bottom waters persist into summer in some deeper portions of the lagoon (15,16). The shallow subsurface (below the sediment surface) consists mostly of peat around the edges of the lagoon, and unconsolidated marine and nonmarine silt-to gravel-sized sediment as seen from boreholes on Barter Island (18).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Absence of ice-bonded permafrost beneath an Arctic lagoon revealed by electrical geophysics

et al. 2020

Self Cite

View full text Add to dashboard Cite

Relict permafrost is ubiquitous throughout the Arctic coastal shelf, but little is known about it near shore. The presence and thawing of subsea permafrost are vital information because permafrost stores an atmosphere’s worth of carbon and protects against coastal erosion. Through electrical resistivity imaging across a lagoon on the Alaska Beaufort Sea coast in summer, we found that the subsurface is not ice-bonded down to ~20 m continually from within the lagoon, across the beach, and underneath an ice-wedge polygon on the tundra. This contrasts with the broadly held idea of a gently sloping ice-bonded permafrost table extending from land to offshore. The extensive unfrozen zone is a marine talik connected to on-land cryopeg. This zone is a potential source and conduit for water and dissolved organic matter, is vulnerable to physical degradation, and is liable to changes in biogeochemical processes that affect carbon cycling and climate feedbacks.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Absence of ice-bonded permafrost beneath an Arctic lagoon revealed by electrical geophysics

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a result, a quadratic equation of the SO 2 solubility was fitted as a function of temperature and salinity. However, the equation allows no extrapolations to other SO 2 partial pressures and is therefore limited in their applicability [8][9][10][11][12][13][14][15][16][17].…”

mentioning

confidence: 99%

Absorption of Sulfur Dioxide in Water with High Salinity

Pincovschi¹,

Modrogan²

2019

Rev. Chim.

View full text Add to dashboard Cite

Understanding the absorption behaviour of sulphur dioxide in aqueous electrolyte solutions is of major interest for the design of flue gas desulphurization processes, as for example wet flue gas desulphurization of coal fired power plants or municipal solid waste incineration plants. In the present paper the influence of the water salinity on SO2 absorption is studied. The SO2 absortion was performed in equilibrium condition. The variation of marine solubility from 10 g/L to 40 g/L determines the variation of SO2 concentration in water from 2.6 mol/L to about 3.2 mol/L. In consequence, the variation of water salinity in these limits can detemine a quite big difference of water pollution.

show abstract

Seasonality of dissolved organic matter in lagoon ecosystems along the Alaska Beaufort Sea coast

Connolly

Crump

Dunton

et al. 2021

Limnology & Oceanography

Self Cite

View full text Add to dashboard Cite

Seasonal variations in dissolved organic matter (DOM) fluxes from land to sea have been well documented in the Arctic, yet remarkably little is known about how DOM varies seasonally within Arctic coastal waters. This is particularly true for shallow inshore environments. Here we document seasonality of DOM in lagoons along the eastern Alaska Beaufort Sea coast during the spring ice break-up (June), summer open-water (August), and late winter ice-covered (April) periods. We measured dissolved organic carbon (DOC) concentrations, C:N ratios, and chromophoric DOM (CDOM) characteristics (SUVA 254 and S 275-295 ). On average, lagoon DOC was highest during spring ($200 μM) and lowest during winter ($120 μM). C:N and SUVA 254 also differed markedly between spring (C:N $ 28; SUVA 254 $ 3.5 L mg C À1 m À1 ) and winter (C:N $ 16; SUVA 254 $ 2.2 L mg C À1 m À1 ). Average S 275-295 values ($14-17 Â 10 À3 nm À1 ) were not significantly different among seasons, but variability in S 275-295 was much lower in spring. This was attributed to terrestrial runoff based on its relatively uniform composition during the spring freshet. Seasonal variations in lagoon DOM were broadly correlated with variations in salinity (i.e., lagoon water transitioned from largely fresh in spring to hypersaline in winter), but a mixing analysis revealed strong evidence of processing and net DOC generation in summer. We also found evidence of DOC processing and build-up under the ice over the winter. This baseline understanding of DOM seasonality in Arctic lagoons is essential for evaluating climate-linked impacts on Arctic coastal ecosystems and broader feedbacks associated with carbon cycling.

show abstract

Salinity and Temperature Regimes in Eastern Alaskan Beaufort Sea Lagoons in Relation to Source Water Contributions

Cited by 27 publications

References 25 publications

Absence of ice-bonded permafrost beneath an Arctic lagoon revealed by electrical geophysics

Absence of ice-bonded permafrost beneath an Arctic lagoon revealed by electrical geophysics

Absorption of Sulfur Dioxide in Water with High Salinity

Seasonality of dissolved organic matter in lagoon ecosystems along the Alaska Beaufort Sea coast

Contact Info

Product

Resources

About