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Kohfeld, Karen E; Chastain, Stephen; Pellatt, Marlow G; Olid, Carolina (2022): Carbon stocks and carbon accumulation rates of sediment cores in Clayoquot Sound, British Columbia, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.947803, In: Kohfeld, KE et al. (2022): Salt marsh soil carbon content, loss on ignition, dry bulk density, carbon stocks, lead-210 and carbon accumulation rates, for Clayoquot Sound, British Columbia, Canada [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.947825

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Abstract:
The goal of this project was to provide the first estimates of blue carbon stocks and carbon accumulation rates in the high and low marsh zones of salt marshes from the Pacific Coast of Canada, within the Clayoquot Sound UNESCO Biosphere Reserve and Pacific Rim National Park Reserve on the Pacific Coast of Canada. Sediment cores were collected using a simple percussion coring technique in which a 57-mm diameter, PVC vacuum tubing fitted with a plastic core catcher (AMS Inc.) was hammered into the ground until the depth of refusal. At the GBK location, a steel sledge corer (AMS Inc.) was used to extract four cores before mechanical problems required switching to the simpler percussion method.
This datafile provides a summary of the estimated C stocks and carbon accumulation rates for the thirty-four sediment cores that were collected from seven salt marshes during summer (June-September) 2016. The sediment type at the base of each core was recorded. We also recorded the deepest sediment depth at which peat was found, referred to as the depth of the “Peat Base.” This depth was used to estimate the C stock for the marsh. Compaction was measured as length of core penetration divided by the length of core recovered. Using the compaction factor, we provide estimates of “uncorrected” (using original core depths) and “corrected” (applying compaction factor) values for the dry bulk density (g/cm3) and soil carbon density (g C/cm3). We provide estimates of C stocks (a) to the peat base, (b) for the whole core, and (c) to the depth of the 30-year horizon in the eight cores for which we have measured 210Pb systematics. We calculated the mass of all carbon down to the base of the peat layer to estimate the C-stock to peat base for each core, and this calculation did not require use of the compaction factor. The “corrected” values were provided to facilitate comparison with other studies (and for calculating the 20-cm C stock). ArcMap 10.3 tools were used with 50 x 50 cm resolution aerial orthophotos (taken in July 2014, Government of British Columbia) to estimate the total marsh area for each marsh.
Keyword(s):
210Pb; blue carbon; carbon accumulation rates; carbon stocks; dry bulk density; loss on ignition; organic carbon; Pacific Canada; salt marsh; tidal wetland
Related to:
Chastain, Stephen; Kohfeld, Karen E; Pellatt, Marlow G; Olid, Carolina; Gailis, Maija (2022): Quantification of blue carbon in salt marshes of the Pacific coast of Canada. Biogeosciences, 19(24), 5751-5777, https://doi.org/10.5194/bg-19-5751-2022
Funding:
Natural Sciences and Engineering Research Council (NSERC), grant/award no. RGPIN342251
Coverage:
Median Latitude: 49.158301 * Median Longitude: -125.745918 * South-bound Latitude: 49.087560 * West-bound Longitude: -125.911000 * North-bound Latitude: 49.279350 * East-bound Longitude: -125.666020
Date/Time Start: 2016-01-01T00:00:00 * Date/Time End: 2016-09-16T00:00:00
Event(s):
CBE_1-1 (Cannery Bay East, Clayoquot Sound, British Columbi) * Latitude: 49.141390 * Longitude: -125.666200 * Date/Time: 2016-06-08T00:00:00
CBE_1-2 (Cannery Bay East, Clayoquot Sound, British Columbi) * Latitude: 49.141420 * Longitude: -125.666290 * Date/Time: 2016-06-08T00:00:00
CBE_1-3 (Cannery Bay East, Clayoquot Sound, British Columbi) * Latitude: 49.141470 * Longitude: -125.666360 * Date/Time: 2016-06-08T00:00:00
Comment:
CBE=Cannery Bay East
CBW = Cannery Bay West
CRF = Cypress River Flats
GBK = Grice Bay- Kootowis Creek
KCS = Kennedy Cove South
SWC = Shipwreck Cove
TMF = Tofino Mud Flats
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1LocationLocationKohfeld, Karen Esee commentName of marsch
2Event labelEventKohfeld, Karen ECore ID
3Latitude of eventLatitudeKohfeld, Karen ECore ID
4Longitude of eventLongitudeKohfeld, Karen ECore ID
5ZoneZoneKohfeld, Karen Emarsh zone: high or low marsh
6Sediment typeSedimentKohfeld, Karen Esoil type at the base of sediment core
7Core lengthCore lengthcmKohfeld, Karen EUncorrected
8Compaction factorComp factKohfeld, Karen Eunitless factor based on the full core length (corrected_depth) divided by compacted core depth (uncorrected_depth)
9Core lengthCore lengthcmKohfeld, Karen ECorrected
10Depth, peat baseDepth peat basecmKohfeld, Karen ECorrecteddepth of deepest layer containing peat and overlying sand, gravel, or clay
11Density, dry bulkDBDg/cm3Kohfeld, Karen ECalculated average/mean valuesuncorrected, measured to peat base
12Density, dry bulkDBDg/cm3Kohfeld, Karen ECalculated standard error (SE)uncorrected, standard error (stdev/sqrt(n)) of averaged DBD to peat base
13Density, dry bulkDBDg/cm3Kohfeld, Karen ECalculated average/mean valuescorrected for compaction, measured to peat base
14Density, dry bulkDBDg/cm3Kohfeld, Karen ECalculated standard error (SE)corrected for compaction, standard error (stdev/sqrt(n)) of averaged DBD to peat base
15CarbonC%Kohfeld, Karen ECalculated average/mean valuesto depth of refusal, estimated from LOI using %C = 0.44(%LOI) -1.8
16CarbonC%Kohfeld, Karen ECalculated average/mean valuesto the base peat layer, percent carbon estimated from LOI using %C = 0.44(%LOI)-1.8
17CarbonC%Kohfeld, Karen ECalculated standard error (SE)standard error (stdev/sqrt(n)) of percent C to peat base
18Carbon density, soilSCDg/cm3Kohfeld, Karen ECalculated average/mean valuesto depth of refusal, corrected for compaction
19Carbon density, soilSCDg/cm3Kohfeld, Karen ECalculated average/mean valuesto base of peat layer, corrected for compaction
20Carbon density, soilSCDg/cm3Kohfeld, Karen ECalculated standard error (SE)standard error (stdev/sqrt(n)) of SCD to peat base
21Area in hectareAreahaKohfeld, Karen Earea of marsh zone in which core was collected
22Soil carbon stockC stockt/haKohfeld, Karen Eto depth of refusal, Sum of partial carbon masses from each 1cm subsection from surface to DoR, MgC/ha
23Soil carbon stockC stockt/haKohfeld, Karen Eto base of peat, Sum of partial carbon masses from each 1cm subsection from surface to base of peat, MgC/ha
24Soil carbon stockC stockt/haKohfeld, Karen Eto 30 cm (corrected) depth
25Soil carbon stockC stockt/haKohfeld, Karen Eto 20 cm (corrected) depth
26Soil carbon stockC stockt/haKohfeld, Karen Eto shared 30 year horizon depth estimated by summing all partial carbon masses from each subsection to depth of 30 years
27Accumulation rate per yearAcc rateg/cm2/aKohfeld, Karen Ecore's mass accumulation rate
28Accumulation rate per year, standard deviationAcc rate std dev±Kohfeld, Karen E
29Sedimentation rate per yearSRcm/aKohfeld, Karen ECalculated average/mean valuesmean linear sedimentation rate
30Sedimentation rate per year, standard deviationSR std dev±Kohfeld, Karen E
31Accumulation rate, carbon, per yearAcc rate Cg/m2/aKohfeld, Karen E30 yr CAR: carbon accumulation rate of 30 years prior to 2016; this calculation only uses %C values for the 30 year depth mark and above
32Accumulation rate, carbon, per year, standard deviationAcc rate C std dev±Kohfeld, Karen E30 yr CAR SD: standard deviation of carbon accumulation rate for 30 years prior to 2016
33CarbonC%Kohfeld, Karen E30 yr %C: mass percentage of carbon for 30 years prior to 2016, Calculated from the cumulative mass of carbon (relative to total mass) for the past 30 years
34Accumulation rate, carbon, per yearAcc rate Cg/m2/aKohfeld, Karen Ebasal peat CAR: carbon accumulation rate to basal age found at the depth of the deepest peat layer overlying sand/gravel
35Accumulation rate, carbon, per year, standard deviationAcc rate C std dev±Kohfeld, Karen Ebasal peat CAR SD: standard deviation of carbon accumulation rate to depth of the deepest peat layer overlying sand/gravel
36CarbonC%Kohfeld, Karen Ebasal peat %C: mass percentage of carbon to depth of the deepest peat layer overlying sand/gravel
37Accumulation rate, carbon, per yearAcc rate Ct/aKohfeld, Karen Ebasal (Mg C/y)
38Accumulation rate, carbon, per yearAcc rate Ct/aKohfeld, Karen E30 yr (Mg C/y)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
834 data points

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