This data release includes soil properties for marsh sediment cores taken in both a C3 (Schoenoplectus americanus) and C4 (Spartina patens) dominated marsh adjacent to the SMARTX warming plots at the Smithsonian Environmental Research Center. Large push cores were collected from each of the dominant vegetation types and analyzed for bulk density, % organic matter, and accretion rates using 210Pb analysis.
| Start date | End date |
|---|---|
| 2018 | 2018 |
| Rank name | Value |
|---|---|
| Species | Schoenoplectus americanus |
| Species | Spartina patens |
| attribute name | definition | format, unit or codes |
|---|---|---|
| study_id | Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail. | |
| coring_method | Code indicating what type of device was used to collect soil depth profiles. | push core = Any number of coring types involving driving a tube into the sediment to recover a core |
| compaction_flag | Code indicating how the authors qualified or quantified compaction of the core. | no obvious compaction = Authors observed no obvious compaction |
| dry_bulk_density_temperature | Temperature at which samples were dried to measure dry bulk density. This can include either samples that were freeze dried or oven dried. | celsius |
| dry_bulk_density_time | Time over which samples were dried to measure dry bulk density. | hour |
| dry_bulk_density_sample_volume | Sample volume used for bulk density measurements, if held constant. | cubicCentimeter |
| loss_on_ignition_temperature | Temperature at which samples were combusted to estimate fraction organic matter. | celsius |
| loss_on_ignition_time | Time over which samples were combusted to estimate fraction organic matter. | hour |
| loss_on_ignition_sample_mass | Sample mass used for loss on ignition, if held constant. | gram |
| cs137_counting_method | Code indicating the method used for determining radiocesium activity. | gamma = Gamma counting method used. |
| pb210_counting_method | Code indicating the method used for determining lead 210 activity. | gamma = Gamma counting method used. |
| excess_pb210_model | Code indicating the model used to estimate excess lead 210. | CRS = Constant rate of supply model used |
| age_depth_model_reference | Code indicating the reference or 0 year of the age depth model. | CE = Year zero is set according to Common Era and Before Common Era standards |
| attribute name | definition | format, unit or codes |
|---|---|---|
| study_id | Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail. | |
| site_id | Site identification code unique to each study. | |
| core_id | Core identification code unique to each site. | |
| core_latitude | Positional latitude of the core in decimal degree WGS84. | degree |
| core_longitude | Positional longitude of the core in decimal degree WGS84. | degree |
| core_position_method | Code indicating how latitude and longitude were determined. | RTK-GPS = Real-time kinematic global position system (GPS) |
| core_elevation | Surface elevation of the core relative to defined datum. | meter |
| core_elevation_datum | The datum relative to which the core elevation was measured against (For a complete list of datum names and aliases please refer to the ISO Geodedic Registry https://iso.registry.bespire.eu/register/geodetic/VerticalDatum). | NAVD88 = A gravity-based geodetic datum, North American Vertical Datum of 1988 |
| core_elevation_method | Code indicating how elevation was determined | RTK-GPS = Real-time kinematic global position system (GPS) |
| vegetation_class | Code based on submitter field observations or measurement indicating dominant wetland vegetation type. | emergent = Describes wetlands dominated by persistent emergent vascular plants |
| attribute name | definition | format, unit or codes |
|---|---|---|
| study_id | Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail. | |
| site_id | Site identification code unique to each study. | |
| core_id | Core identification code unique to each site. | |
| depth_min | Minimum depth of a sampling increment. | centimeter |
| depth_max | Maximum depth of a sampling increment. | centimeter |
| sample_id | Sample identification unique to the core. This should be used in the case that there are relevant lab specific sample codes, or in the case that there are multiple replicate samples. | |
| dry_bulk_density | Dry mass per unit volume of a soil sample. This does not include ash free bulk density. | gramsPerCubicCentimeter |
| fraction_organic_matter | Mass of organic matter relative to sample dry mass. Ash free bulk density should not be used here but should be expressed as a loss on ignition fraction. | dimensionless |
| cs137_activity | Radioactivity counts per unit dry weight for radiocesium (137Cs). | disintegrationsPerMinutePerGram |
| cs137_activity_se | 1 standard error of uncertainty associated with cs137_activity. | disintegrationsPerMinutePerGram |
| total_pb210_activity | Total radioactivity counts per unit dry weight for excess lead 210 (210Pb). | disintegrationsPerMinutePerGram |
| total_pb210_activity_se | 1 standard error of uncertainty associated with total_pb210_activity. | disintegrationsPerMinutePerGram |
| excess_pb210_activity | Excess radioactivity counts per unit dry weight for excess lead 210 (210Pb). | disintegrationsPerMinutePerGram |
| excess_pb210_activity_se | 1 standard error of uncertainty associated with excess_pb210_activity. | disintegrationsPerMinutePerGram |
| pb214_activity_295keV | Radioactivity counts per unit dry weight for lead 214 (214Pb) at 295 keV | disintegrationsPerMinutePerGram |
| pb214_activity_se_295keV | 1 standard error of uncertainty associated with pb214_activity at 295 keV. | disintegrationsPerMinutePerGram |
| pb214_activity_352keV | Radioactivity counts per unit dry weight for lead 214 (214Pb) at 352 keV | disintegrationsPerMinutePerGram |
| pb214_activity_se_352keV | 1 standard error of uncertainty associated with pb214_activity at 352 keV. | disintegrationsPerMinutePerGram |
| bi214_activity | Radioactivity counts per unit dry weight for Bismuth 214 (bi214) | disintegrationsPerMinutePerGram |
| bi214_activity_se | 1 standard error of uncertainty associated with bi214_activity. | disintegrationsPerMinutePerGram |
| age | Most likely, median, or mean age of the depth interval from submitter generated age depth model. | nominalYear |
| age_sd | Standard deviation of age estimate from submitter generated age depth model. | nominalYear |
| sedimentation_rate | Rate of sedimentation derived from Constant Rate of Supply (CRS) model. | millimeterPerYear |
| sedimentation_rate_se | 1 standard error of error associated with sedimentation_rate | millimeterPerYear |
| unit name | parent SI unit | unit type | description |
|---|---|---|---|
| disintegrationsPerMinutePerGram | radionucleotideActivityPerMass | disintegrations per minute per gram is a measure of the activity of the source of radioactivity | |
| cubicCentimeter | cubicMeter | volume | cubic centimeter |
| millimeterPerYear | metersPerSecond | speed | millimeter per year |
This dataset is listed under a Creative Commons BY 4.0 and can be used with attribution. https://creativecommons.org/licenses/by/4.0/