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GCE-LTER Data Set Summary

Accession: MSH-GCET-2402a Research Theme: Marsh Ecology (Graduate Thesis Study)
Contributors: Peter Hawman, David Cotten, Deepak Mishra
Title: Eddy covariance 30-minute CO2 fluxes with accompanying biophysical variables from the GCE-LTER flux tower site from January 2014 to December 2022 for sensor Flux2
Abstract: Eddy covariance (EC) CO2 fluxes from sensor set "Flux2" from January 2014 to December 2022 collected over a Spartina alterniflora marsh located on the western side of Sapelo Island bounded by the Duplin River and Barn Creek. EC fluxes were processed in EddyPro 7. Additional biophysical variables included are air temperature, relative humidity, vapor pressure deficit, and water table height from a nearby tidal creek and the marsh platform.
DOI: 10.6073/pasta/c65b7eb8d7c46f1ff50a98d032125ebf
Key Words: air temperature, carbon dioxide, carbon fluxes, Climate Monitoring, Duplin River, eddy covariance, Long-term Data, net primary productivity, photosynthetically active radiation, salt marshes, Sapelo Island, Spartina alterniflora, vapor pressure, water level, wind direction, wind speed
LTER Core Area: Primary Production
Research Themes: Marsh Ecology, Meteorology
Study Period: 01-Jan-2014 to 31-Dec-2022
Study Sites:
GCE_Flux -- GCE Flux Tower Marsh, Sapelo Island, Georgia
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Research Protocols:

Protocol for calculating sampling error in CO2 flux measurements (Journal of Geophysical Research)

Impact of post-field data processing on eddy covariance flux estimates and energy balance closure (Meteorologische Zeitschrift)

Averaging Detrending and Filtering of Eddy Covariance Time Series (Handbook of Micrometeorology)

A system to measure surface fluxes of momentum, sensible heat, water vapour and carbon dioxide (Journal of Hydrology)

Quality Control and Flux Sampling Problems for Tower and Aircraft Data (Journal of Atmospheric and Oceanic Technology)

Correction of flux measurements for density effects due to heat and water vapour transfer (Quarterly Journal of the Royal Meteorological Society)

Sonic Anemometer Tilt Correction Algorithms (Boundary-Layer Meteorology)


Hawman, P., Cotten, D.L. and Mishra, D. 2024. Canopy Heterogeneity and Environmental Variability Drive Annual Budgets of Net Ecosystem Carbon Exchange in a Tidal Marsh. JGR Biogeosciences. (DOI: 10.1029/2023JG007866)

Downloads: Information

Data Table: MSH-GCET-2402a (Main data table for data set MSH-GCET-2402a, 157786 records)

Access: Public (released 19-Mar-2024)

Metadata: Text (ESA FLED), XML (Ecological Metadata Language)

Data Formats: Spreadsheet (CSV) [17777.75kb],  Text File [19442.34kb],  MATLAB (GCE Toolbox) [12930.80kb],  MATLAB (Variables) [12930.28kb],  Text Report [20434.29kb]

Column List:(hide)

Column Name Units Type Description
1 datetime yyyy-mm-dd HH:MM:SS - GMT string Calendar date and time of observation
2 wind_speed m/s floating-point Wind speed, 30 minute mean
3 wind_dir degrees floating-point Wind direction, 30 minute mean
4 ustar m/s floating-point Friction velocity
5 L meters floating-point Monin-Obukhov length
6 Z_L none floating-point Monin-Obukhov stability parameter (z-d)/L
7 v_var m/s floating-point Variance of lateral velocity fluctuations
8 co2_flux umol/m^2/s floating-point Corrected carbon dioxide flux
9 qc_co2_flux none integer Quality flag for gas flux
10 rand_err_co2_flux umol/m^2/s floating-point Random error for carbon dioxide flux
11 co2_strg umol/m^2/s floating-point Estimate of storage carbon dioxide flux
12 Mean_PAR_Incident umol/m^2/s floating-point Photosynthetically active radiation, 30 minute mean
13 Mean_Temp_Air °C floating-point Air temperature, 30 minute mean
14 Mean_Humidity % floating-point Relative humidity, 30 minute mean
15 VPD kPa floating-point Vapor pressure deficit, 30 minute mean
16 Mean_Water_Table_Creek meters floating-point Water table level in creek, 30 minute mean
17 Mean_Water_Table_Marsh meters floating-point Water table level on marsh, 30 minute mean
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Hawman, Peter. 2024. Eddy covariance 30-minute CO2 fluxes with accompanying biophysical variables from the GCE-LTER flux tower site from January 2014 to December 2022 for sensor Flux2. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/c65b7eb8d7c46f1ff50a98d032125ebf

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This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959, OCE-1237140 and OCE-1832178. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.