Comment on “Core compression and surficial sediment loss of lake sediments of high porosity caused by gravity coring” (Crusius and Anderson)<sup>1</sup>

Cumming, Brian F.; Glew, John R.; Smol, John P.; Davis, Ronald B.

doi:10.4319/lo.1993.38.3.0695

Cited by 25 publications

(13 citation statements)

References 19 publications

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“…2, 3). The congruence of FC, KB and BC results indicates that common artifacts such as surface sediment loss (Crusius & Anderson, 1991;Cumming et al, 1993), core compression or shortening (Wright, 1993), and smearing inside core tubes (Chant & Cornett, 1993), had little impact on the contaminant concentration profiles. None of the cores, however, show strong peaks of 137Cs activity corresponding to the date of maximum input from atmospheric fallout, nor do they show strong gradients of 2]~ activity.…”

Section: Resultsmentioning

confidence: 99%

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Coring artifacts and contaminant inventories in lake sediment

et al. 1996

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Sediments of Lake 382, Experimental Lakes Area, Canada, were sampled at six sites using a 5-cm Wildco KB core sampler (KB), a similar device incorporating a ball check valve (BC), and a 0.2 m by 1.2 m flat-faced aluminum freeze core sampler (FC). Cores were sectioned at l-cm intervals to a depth of 15 cm. Contaminant (21~ and 137Cs) concentrations (Bq g-1 ) were measured by gamma spectroscopy, and inventories (Bq cm -2) were calculated following standard methods. Sediments collected using FC, BC and KB had similar contaminant concentrations, however, cores collected by FC and BC had lower estimated inventories than KB cores. Differences between estimates appear to be caused by differences in the water content (WC) of core material. Laboratory studies confirm that FC sediments have higher WC than tube-cored sediment. We hypothesize that ice crystal formation increases the WC of freeze cores, resulting in lower contaminant inventories. Loss of surficial sediment caused by a 'bow wave' may have a similar effect on BC samples. We conclude that KB core gear is appropriate for sampling sediments to measure contaminant concentrations and inventories in recently deposited sediments.

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Section: Resultsmentioning

confidence: 99%

“…Crusius & Anderson (1991) and Chant & Cornett (1991) claimed that gravity cores suffer from artifacts (smearing, core compression and surficial sediment loss), and that freeze cores are superior. Cumming et al (1993) and Wright (1993) criticized Crusius & Anderson, pointing out that their gravity-core gear was poorly designed and operated.…”

Section: Introductionmentioning

confidence: 99%

Coring artifacts and contaminant inventories in lake sediment

et al. 1996

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“…Gravity corers may collect slightly less mass in longer cores (yielding lower accumulation rates) due to progressively increasing compression with depth (Cumming et al, 1993). This effect would be minimal in the upper 0-20 cm of sediment, the depth interval of interest in our lakes.…”

Section: Coring and Field Processingmentioning

confidence: 96%

Deconstruction of Historic Mercury Accumulation in Lake Sediments, Northeastern United States

et al. 2005

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Total atmospheric contribution of mercury (Hg(T)) to lake sediment was estimated using 210Pb-dated sediment cores. Algorithms based on estimates of lake and watershed processes were applied to more accurately assess anthropogenic contributions of Hg to the environment and Hg(T). Factors addressed include: lake-specific background accumulation rates of Hg (Hg(B)), variability of sediment accumulation rates that caused variation in Hg accumulation during the last 100-150 years (Hgv), and variable flux of anthropogenic Hg from the atmosphere (Hg(A)). These fluxes were normalized for sediment focusing using a regional, unsupported 210Pb correction factor to yield Hg(A,F). Time series maps of Hg(A,F) allow for comparison across time and space, and are provided for 1900, 1950, 1975 and 1990 across eastern New York and New England, USA. Deconstruction algorithms reduce inter-/intra-lake variability in Hg accumulation rates and improve temporal coherence. Hg(A,F) started to increase near the end of the 19th century to a maximum between 1970 and 1990, depending on the lake. Maximum Hg(T) across the region ranges from 27.1 to 175 microg/m2 year. Maximum Hg(A,F) ranged from 10.4 to 66.3 microg/m2 year. The timing of Hg(A,F) declines in response to decreased atmospheric deposition may be controlled by in-lake and in-watershed storage and transport of Hg-bearing sediment.

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“…Sauf à l'intérieur des séquences laminées (en noir), les lignes horizontales ne représen-tent que les parties les plus accusées (> 0,5 mm d'épaisseur) de chacun des faciès. encounters greater resistance from relatively stiff sediment (Cumming et al, 1993). It has also been argued that compaction will be greater in the most porous (least consolidated) sediments, assuming that pore water is able to escape during corer penetration (Crusius and Anderson, 1993).…”

Section: Basal Diamictunclassified

Glaciolacustrine sediments and Neoglacial history of the Chephren Lake basin, Banff National Park, Alberta

Dirszowsky¹,

Desloges²

2002

gpq

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AbstractModern and historical sedimentation in Chephren Lake are examined in order to assess the relations between glacier activity, sediment production, and the lacustrine depositional record. Bottom sediment data and lake morphology indicate that sediments in the distal part of the lake primarily settled from suspension and that glaciers are the most important source. A 4.3 m core obtained from the distal sediments reveals that accumulation of fine, glacially-derived material has increased since at least 2 420 BP. Simple geochemical indicators reflect this and support regional evidence for progressive (though punctuated) climate deterioration through the Neoglacial period. Distinct rhythmite sequences (especially beginning ca. 3 460, 2 330, 1 470 and 530 BP) are thought to represent minor glacier retreats which help define separate phases of Neoglacial advance identified by previous workers. In contrast, increasing slope stability indicated by a reduction in graded sand and clast facies may be specific to slopes overlooking the coring site.

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Comment on “Core compression and surficial sediment loss of lake sediments of high porosity caused by gravity coring” (Crusius and Anderson)¹

Cited by 25 publications

References 19 publications

Coring artifacts and contaminant inventories in lake sediment

Coring artifacts and contaminant inventories in lake sediment

Deconstruction of Historic Mercury Accumulation in Lake Sediments, Northeastern United States

Glaciolacustrine sediments and Neoglacial history of the Chephren Lake basin, Banff National Park, Alberta

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Comment on “Core compression and surficial sediment loss of lake sediments of high porosity caused by gravity coring” (Crusius and Anderson)1

Cited by 25 publications

References 19 publications

Coring artifacts and contaminant inventories in lake sediment

Coring artifacts and contaminant inventories in lake sediment

Deconstruction of Historic Mercury Accumulation in Lake Sediments, Northeastern United States

Glaciolacustrine sediments and Neoglacial history of the Chephren Lake basin, Banff National Park, Alberta

Contact Info

Product

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Comment on “Core compression and surficial sediment loss of lake sediments of high porosity caused by gravity coring” (Crusius and Anderson)¹