Dataset: Palmer Station Sediment Trap

Name: Particulate organic carbon, nitrogen, and Thorium-234 measurements collected during the 2012-2013 Palmer Field Season (WAP Carbon export project)
Published: 2022-08-02
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.881127.1

Spatial Extent: N:-64.7795 E:-64.0405 S:-64.815 W:-64.0725

Western Antarctic Peninsula near Anvers Island

Temporal Extent: 2012-01-06 - 2013-01-27

Project:

Quantifying Processes Driving Interannual Variability in the Biological Carbon Pump in the Western Antarctic Peninsula (WAP Carbon export)

Principal Investigator:

Michael R. Stukel (Florida State University EOAS, FSU - EOAS)

Contact:

Michael R. Stukel (Florida State University EOAS, FSU - EOAS)

BCO-DMO Data Manager:

Sawyer Newman (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2022-08-02

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Particulate organic carbon, nitrogen, and Thorium-234 measurements collected during the 2012-2013 Palmer Field Season (WAP Carbon export project)

Abstract:

Sinking organic carbon, nitrogen, and Th-234 fluxes measured using bottom-tethered, VERTEX-style sediment traps during the 2012-2013 field season of the Palmer LTER program near Anvers Island in the Western Antarctic Peninsula. These flux measurements allow investigation of the ocean’s biological carbon pump. Sediment trap deployments span the ice-free season near Anvers Island. Deployments lasted between 2 and 8 days, depending on ocean conditions.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2022-08-02	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.881127.1	2024-09-23

Methods & Sampling

Data comes from VERTEX-style, bottom-tethered (moored) sediment trap deployments. Particle interceptor tubes were deployed on cross-pieces with 4 tubes attached at a depth of 50 m. Tubes were deployed with a dense formaldehyde brine created by adding NaCl and formaldehyde to filtered seawater. After recovery, overlying seawater was removed from each tube by gentle suction. Tubes were then gravity filtered through a 200-micron nitex mesh filter, and the 200-micron filters were carefully analyzed under a stereomicroscope and all metazoan zooplankton “swimmers” were removed from the sample. Filtrate and remaining material on the 200-micron filter were then each filtered through separate pre-combusted quartz (QMA) filter. Samples were then dried, mounted in RISO planchets and counted on a RISO low-level beta multi-counter. After subsequent background counts, samples were acidified to remove calcium carbonate and analyzed for carbon and nitrogen on an elemental analyzer.

Problems/Issues

Blank values in the dataset indicate that the samples were lost and/or the data is otherwise unavailable.

BCO-DMO Processing

- Spaces removed from column names and replaced with underscores ("_")
- Special characters removed from column names and replaced with textual representation (e.g., ">" was replaced with "greater_than", "<" was replaced with "less_than", "σ" (theta) was replaced with "standard_error", etc.)
- Row containing units removed from the data file
- Converted date values in the data file from %m-%d-%y %H:%M format to %Y-%M-%DT%H:%M format
-'b.d' (below detection) values removed from the N_greater_than_200 and standard_error_N_greater_than_200 columns of the data file and two new fields were created called N_greater_than_200_flag and standard_error_N_greater_than_200_flag; these new columns indicate if blank values in the original two columns indicate measurements were 'below detection' limits
- 'NaN' values in the data file were replaced with blank values ("")

Data Files

File
881127_v1_palmer_station_sediment_trap.csv (Comma Separated Values (.csv), 3.80 KB) MD5:ed84faacaf572871100c195d70cfede0 Primary data file for dataset ID 881127, version 1

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Office of Polar Programs (formerly NSF PLR)	OPP-1951090
NSF Division of Ocean Sciences	OCE-1756610
NSF Office of Polar Programs (formerly NSF PLR)	OPP-1340886
NSF Office of Polar Programs (formerly NSF PLR)	OPP-1440435

Deployments

None available yet

Instruments

GM multicounter

Supplied Name: Riso low-level GM beta multi-counter

Supplied Description:

Collected sediment trap samples were dried, mounted in RISO planchets and counted on a RISO low-level beta multi-counter.

Instrument Type

Generic Name: GM multicounter

Generic Description:

A gas flow multicounter (GM multicounter) is used for counting low-level beta doses. GM multicounters can be used for gas proportional counting of 32Si to 32P. For more information about GM multicounter usage see Krause et. al. 2011.

Microscope - Optical

Supplied Name: Stereomicroscope

Supplied Description:

Filtered seawater samples in 200-micron filters were carefully analyzed under a stereomicroscope and all metazoan zooplankton “swimmers” were removed from the sample.

Instrument Type

Generic Name: Microscope - Optical

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB05/

Generic Description:

Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a "light microscope".

Sediment Trap

Supplied Name: VERTEX-style bottom-tethered (moored) sediment trap

Supplied Description:

Particle interceptor tubes were deployed on cross-pieces with 4 tubes attached at a depth of 50 m. Tubes were deployed with a dense formaldehyde brine created by adding NaCl and formaldehyde to filtered seawater.

Instrument Type

Generic Name: Sediment Trap

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/33/

Generic Description:

Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. This designation is used when the specific type of sediment trap was not specified by the contributing investigator.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Station	Palmer LTER Station Name from which sample was collected	unitless	station
Latitude	Station Latitude in decimal degrees; a positive value indicates a Northern coordinate	decimal degrees	lat
Longitude	Station Longitude in decimal degrees; a positive value indicates an Eastern coordinate	decimal degrees	lon
Date_Deployed	Date of deployment in local time at Palmer Station (UTC-3). Format: %Y-%m-%d	unitless	date
Date_Recovered	Date of deployment in local time at Palmer Station (UTC-3). Format: %Y-%m-%d	unitless	date
Depth	Depth of sample collection.	meters (m)	depth
Corg	Particulate organic carbon (POC) flux.	milligrams of carbon per square meter per day (mg C/m^2/d)	flux_POC_mass
standard_error_Corg	Standard error of POC flux.	milligrams of carbon per square meter per day (mg C / m^2 / d)	flux_POC_mass
N	Particulate nitrogen flux.	milligrams of nitrogen per square meter per day (mg N/m^2/d)	flux_N_mass
standard_error_N	Standard error of particulate nitrogen flux.	milligrams of nitrogen per square meter per day (mg N/m^2/d)	flux_N_mass
Corg_less_than_200	POC flux (<200 microns).	milligrams of carbon per square meter per day (mg C/m^2/d)	flux_POC_mass
standard_error_Corg_less_than_200	Standard error of POC flux (<200 microns).	milligrams of carbon per square meter per day (mg C/m^2/d)	flux_POC_mass
Corg_greater_than_200	POC flux (>200 microns).	milligrams of carbon per square meter per day (mg C/m^2/d)	flux_POC_mass
standard_error_Corg_greater_than_200	Standard error of POC flux (>200 microns).	milligrams of carbon per square meter per day (mg C/m^2/d)	flux_POC_mass
N_less_than_200	PN flux (<200 microns).	milligrams of nitrogen per square meter per day (mg N/m^2/d)	flux_N_mass
standard_error_N_less_than_200	Standard error of PN flux (<200 microns).	milligrams of nitrogen per square meter per day (mg N/m^2/d)	flux_N_mass
N_greater_than_200	PN flux (>200 microns).	milligrams of nitrogen per square meter per day (mg N/m^2/d)	flux_N_mass
N_greater_than_200_flag	Flag column indicating rows where blank PN flux (>200 microns) values indicate that a measurement was "below detection."	unitless	q_flag
standard_error_N_greater_than_200	Standard error of PN flux (>200 microns).	milligrams of nitrogen per square meter per day (mg N/m^2/d)	flux_N_mass
standard_error_N_greater_than_200_flag	Flag column indicating rows where blank standard error of PN flux (>200 microns) values indicate that a measurement was "below detection."	unitless	q_flag
Th234	Thorium isotope 234Th flux.	decays per minute per meter squared per day (dmp/m^2/d)	Th234
standard_error_Th234	Uncertanty in Thorium isotope 234Th flux.	decays per minute per meter squared per day (dmp/m^2/d)	Th234

Status message

Database

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Dataset: Palmer Station Sediment Trap