Holl, David; Wille, Christian; Sachs, Torsten; Schreiber, Peter; Runkle, Benjamin R K; Beckebanze, Lutz; Langer, Moritz; Boike, Julia; Pfeiffer, Eva-Maria; Fedorova, Irina V; Bolshiyanov, Dimitry Yu; Grigoriev, Mikhail N; Kutzbach, Lars (2018): A long-term (2002 to 2017) record of closed path and open path eddy covariance CO₂ net ecosystem exchange fluxes from the Siberian Arctic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.892751, Supplement to: Holl, D et al. (2019): A long-term (2002 to 2017) record of closed-path and open-path eddy covariance CO2 net ecosystem exchange fluxes from the Siberian Arctic. Earth System Science Data, 11(1), 221-240, https://doi.org/10.5194/essd-11-221-2019
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2018-08-01 • DOI registered: 2019-02-04
Abstract:
Ground-based observations of atmospheric variables are necessary to progressively improve global climate models. Observed data can be used for model evaluation and to develop or tune process models. In arctic permafrost regions, climate-carbon feedbacks might potentially be intense. Therefore, increased efforts to better represent these regions in global climate models have been made in recent years.
We present a multiannual time series of soil-atmosphere carbon dioxide fluxes measured in situ with the eddy covariance technique in the Siberian Arctic (72° 22' N, 126° 30' E). The site is part of the international network of carbon dioxide flux observation stations (FLUXNET, Site ID: Ru-Sam). The data set includes consistently processed fluxes based on concentration measurements of closed path and open path gas analyzers. With parallel records from both sensor types, we were able to apply a site-specific correction to open path fluxes. This correction is necessary due to a deterioration of data, caused by heat generated by the electronics of open path gas analyzers. Parameterizing this correction for subperiods of distinct sensor setups yielded good agreement between open and closed path fluxes. We compiled a long-term (2002 to 2017) carbon dioxide flux time series that we additionally gap-filled with a standardized approach.
Further details:
Finkelstein, Peter L; Sims, Pamela F (2001): Sampling error in eddy correlation flux measurements. Journal of Geophysical Research: Atmospheres, 106(D4), 3503-3509, https://doi.org/10.1029/2000JD900731
Kittler, Fanny; Eugster, Werner; Foken, Thomas; Heimann, Martin; Kolle, Olaf; Göckede, Mathias (2017): High-quality eddy-covariance CO₂ budgets under cold climate conditions. Journal of Geophysical Research: Biogeosciences, 122(8), 2064-2084, https://doi.org/10.1002/2017JG003830
Mauder, Matthias; Foken, Thomas (2004): Documentation and instruction manual of the eddy covariance software package TK2. Universität Bayreuth, Abt. Mikrometeorologie, 26, 1-45
Reichstein, Markus; Falge, Eva; Baldocchi, Dennis; Papale, Dario; Aubinet, Marc; Berbigier, Paul; Bernhofer, Christian; Buchmann, Nina; Gilmanov, Tagir; Granier, André; Grünwald, Thomas; Havránková, Katka; Ilvesniemi, Hannu; Janous, Dalibor; Knohl, Alexander; Laurila, Tuomas; Lohila, Annalea; Loustau, Denis; Matteucci, Giorgio; Meyers, Tilden; Miglietta, Franco; Ourcival, Jean‐Marc; Pumpanen, Jukka; Rambal, Serge; Rotenberg, Eyal; Sanz, M-J; Tenhunen, John; Seufert, Günther; Vaccari, Francesco; Vesala, Timo; Yakir, Dan; Valentini, Riccardo (2005): On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm. Global Change Biology, 11(9), 1424-1439, https://doi.org/10.1111/j.1365-2486.2005.001002.x
Coverage:
Latitude: 72.366670 * Longitude: 126.500000
Date/Time Start: 2002-07-11T09:30:00 * Date/Time End: 2017-10-01T00:00:00
Event(s):
Comment:
The uploaded file contains quality screened half-hourly time series of carbon dioxide fluxes measured with open and closed path gas analyzers. Based on those measurements, we compiled and gap filled a net ecosystem exchange time series that includes quality flags and eddy covariance source area estimates. Please refer to the Parameter comment for a description of the available variables and to the publications mentioned under "Further details" for details about data processing.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Date/Time local | Date/Time local | Kutzbach, Lars | Timestamp referring to end of 30 minute flux calculation period in local time (UTC+9h) | ||
| 2 | DATE/TIME | Date/Time | Kutzbach, Lars | Geocode – Timestamp referring to end of 30 minute flux calculation period in UTC | ||
| 3 | Carbon dioxide, flux, closed path | CO2 flux CP | µmol/m2/s | Kutzbach, Lars | ||
| 4 | Carbon dioxide, flux, closed path, quality classes | QC CO2 flux CP | Kutzbach, Lars | Quality classes 0,1 and 2 (Mauder and Foken, 2004) | ||
| 5 | Carbon dioxide, flux, closed path | CO2 flux CP | µmol/m2/s | Kutzbach, Lars | Random uncertainty estimate (Finkelstein and Sims, 2001) | |
| 6 | Carbon dioxide, flux, open path | CO2 flux OP | µmol/m2/s | Kutzbach, Lars | ||
| 7 | Carbon dioxide, flux, open path | CO2 flux OP | µmol/m2/s | Kutzbach, Lars | Corrected (Kittler et al., 2017) | |
| 8 | Carbon dioxide, flux, open path, quality classes | QC CO2 flux OP | Kutzbach, Lars | Quality classes 0,1 and 2 (Mauder and Foken, 2004) | ||
| 9 | Carbon dioxide, flux, open path | CO2 flux OP | µmol/m2/s | Kutzbach, Lars | Random uncertainty estimate (Finkelstein and Sims, 2001) | |
| 10 | Carbon dioxide, flux | CO2 flux | µmol/m2/s | Kutzbach, Lars | Time series compiled of open and closed path Mauder and Foken (2004) class 0 and 1 fluxes | |
| 11 | Carbon dioxide, flux | CO2 flux | µmol/m2/s | Kutzbach, Lars | Gap filled CO2 flux time series | |
| 12 | Carbon dioxide, flux, quality classes | QC CO2 flux | Kutzbach, Lars | Quality flag of gap filled fluxes, between 0 and 3 (Reichstein et al., 2005) | ||
| 13 | Carbon dioxide, flux, standard deviation | CO2 flux std dev | ± | Kutzbach, Lars | of gap filled flux estimates, calculated from the data used for averaging | |
| 14 | Eddy covariance footprint, contribution of surface class | FP CC | Kutzbach, Lars | dry tundra | ||
| 15 | Eddy covariance footprint, contribution of surface class | FP CC | Kutzbach, Lars | wet tundra | ||
| 16 | Eddy covariance footprint, contribution of surface class | FP CC | Kutzbach, Lars | overgrown water | ||
| 17 | Eddy covariance footprint, contribution of surface class | FP CC | Kutzbach, Lars | open water |
License:
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC-BY-NC-SA-3.0)
Size:
1782160 data points
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