Fire in Arctic Landscape

Weather at Toolik

Fire in the Arctic Landscape Project Data - Conditions of Use

The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1 ) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.

2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.

3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. The metadata for each dataset contains the recommended citation for the dataset.

4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:

Data sets were provided by the MBL Fire in the Arctic Landscape Project. This material is based upon work supported by the National Science Foundation under Grants NSF-ARC-0856853 and NSF-ARC-0808789.

5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.

6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.

Disclaimer

While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

Arctic LTER Database

Conditions of Use

1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:

Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml

4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:

Data sets were provided by the Arctic LTER. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493.

5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

Disclaimer

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	2008ARFluxUnburned.4
Dataset Title:	Anaktuvuk River Burn Eddy Flux Measurements, 2008 Unburned Site, North Slope Alaska
Investigator 1:
First Name:	Gus
Last Name:	Shaver
Organization:	MBL
Address line 2:	7 MBL St.
Address line 3:
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Investigator 2:
First Name:	Adrian
Last Name:	Rocha
Organization:	MBL
Address line 2:	7 MBL St.
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	USA
Associate Investigators:
Keywords:	NEE, Energy and Mass Exchange, Anaktuvuk River fire, AON, disturbance, Eddy flux
Abstract:	We deployed three eddy covariance towers along a burn severity gradient (i.e. severely-, moderately-, and un-burned tundra) to monitor post fire Net Ecosystem Exchange of CO2 (NEE) within the large 2007 Anaktuvuk River fire scar during the summer of 2008. This data represents the first post fire growing season's energy and mass exchange at the unburned site.
For questions about the Metadata and data contact the Investigators. For information about this web site contact:	Arctic LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7496 Email: arc_im@mbl.edu Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL	http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10084&urlTail=burn/terrestrial/data/2008ARFluxUnburned.csv
Data File Name	2008ARFluxUnburned.csv
Beginning Date	1/1/2008
End Date	12/31/2008
Number of Data Records	17520
Other Files to Reference
Availability Status	Type 1
Quality Control Information
Maintenance Description	Data collection and processing complete
Log of Changes:	Version 2, May 2011, Bonnie Kwiatkowski: Updated Metadata sheet. Updated dataset adding new variables.
	Version 3: Updated metadata form to new version (with sites sheet). CH March 2013.
	Version 4: Metadata error repaired - Surface temperature is in Kelvin degrees (previously metadata indicated Celcius degrees)

RESEARCH LOCATION:

Location Name

Unburned flux tower

Select Site or enter New One

Geographic Description

Unburned flux tower site Anaktuvuk River burn, North Slope, Alaska

Enter Description

Location Bounding Box

West Bounding Coordinate

East Bounding Coordinate

North Bounding Coordinate

South Bounding Coordinate

OR if single point location

Latitude

68.9344444444445

In Decimal Degrees

Longitude

-150.272777777778

In Decimal Degrees

Elevation

In Meters

Link to Google Map

View on Google Map


TAXONOMIC COVERAGE:
Organisms studied

Methods:	We deployed three eddy covariance towers with identical instrumentation across a burn severity gradient (Rocha and Shaver 2009). The three sites (i.e. Severe burn, Moderate burn, and Unburned) were 40 km to the west of the nearest road and were selected during a helicopter survey of the southern area of the Anaktuvuk River Fire scar in late May 2008 (Figure 1; Table 1). Because the fire had burned through September of the previous year, initial deployment of flux towers occurred prior to any significant vegetative regrowth, and our sampling campaign captured the full 2008 growing season (June 1-August 28). Each site was equipped with a Campbell Scientific® CR5000 datalogger that recorded data from micrometeorological instrumentation located on a stainless steel tripod (CM110; Campbell Scientific; Logan Utah, USA) at a height of 2.6 m. Data were stored on a 2 Gb PCMCIA card and downloaded every two to three weeks. Power for the datalogger and instrumentation was located 15 m to the east or west of the tower and consisted of a south-facing solar panel and two 12 V 80 amp-hour batteries enclosed in a polyethylene box. Towers ran continuously through the summer of 2008 with the exception of the severe burn site, which was damaged by a bear during the last week of August. The towers have been in operation since June 2008. Environmental data were recorded as half hour averages. Net radiation was monitored with a NRLITE net radiometer (Campbell Scientific; Logan Utah, USA). Incoming and reflected solar and longwave radiation were measured with a CNR-1 Radiometer (Campbell Scientific; Logan Utah, USA), while incoming and reflected Photosynthetically Active Radiation (PAR) were measured with a silicon quantum sensor (LI-COR; Lincoln, NE, USA). Air temperature and relative humidity was measured with an HMP45C-L sensor (Campbell Scientific; Logan Utah, USA) enclosed in a naturally aspirated radiation shield, while precipitation was measured with a tipping bucket rain gauge (TE525; Campbell Scientific; Logan Utah, USA). Volumetric water content at a depth of 2.5 cm was measured with two reflectometers (CS616; Campbell Scientfic; Logan Utah, USA), soil temperature at a depth of 2 and 6 cm was measured with two averaging soil thermocouples (TCAV-L; Campbell Scientific; Logan, Utah, USA), and soil heat flux at a depth of 8 cm was measured with four soil heat flux plates (HFP01; Campbell Scientific; Logan, Utah, USA). Measurements of the soil environment were recorded on separate CR1000 dataloggers at the severely and moderately burned sites. Turbulent fluxes of momentum, sensible heat, latent heat and CO2 were determined by the eddy covariance technique (Baldocchi et al. 1988). Half hourly CO2 and H2O fluxes were calculated as the covariance between the turbulent departures from the mean of the 10 Hz vertical wind speed measured with a 3D sonic anemometer (CSAT3; Campbell Scientific; Logan, Utah, USA) and the CO2 and H2O mixing ratio measured with an open path InfraRed Gas Analyzer (IRGA; LI7500; LI-COR; Lincoln, NE, USA). Fluxes were processed using EdiRe software (University of Edinburgh; Moncrieff et al. 1997) and reported using the meteorological sign convention where negative NEE indicates carbon uptake and positive NEE indicates carbon loss from the ecosystem. Ten Hz data were despiked, rotated to the mean wind streamlines, and corrected for the density effect due to sensible heat transfer (i.e. WPL correction; Webb et al. 1980). Turbulent fluxes of sensible and latent heat captured 78 to 80% of the available energy at each of the sites, which is consistent with energy budget closure observed for other eddy covariance studies (Wilson et al. 2002). The unburned site consists of a tussock tundra vegetation community with 40% of the ground covered with Sphagnum and feather mosses, and the remaining ground cover was composed of Tussocks, Cloudberry, Labrador Tea, Cranberry and dwarf birch [Betula nana L.]. References: Rocha, A.V. and G.R. Shaver (2009) Advantages of a two band EVI derived from solar and photosynthetically active radiation fluxes. Agricultural and Forest Meteorology. 149:1560-1563, doi:10.1016/j.agrformet.2009.03.016. Rocha, A.V. and G.R. Shaver (2011) Burn severity influences post-fire CO2 exchange in arctic tundra. Ecological Applications. 21:477-489. Rocha, A.V. and G.R. Shaver (2011) Postfire energy exchange in arctic tundra: the importance and climatic implications of burn severity. Global Change Biology. doi:10.1111/j.1365-2486.2011.02441.x.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Year	Year	number	number			NAN=Missing or Not Measured
DOY	Unitless Fractional Day of Year from January 1, 2008	number	number			NAN=Missing or Not Measured
Pressure	Atmospheric pressure	number	kilopascal			NAN=Missing or Not Measured
Air Temperature	Air temperature at 2.6m	number	celsius			NAN=Missing or Not Measured
Surface Temperature (Apogee)	Kelvin degrees at surface	number	kelvin			NAN=Missing or Not Measured
Soil Temperature	Soil Temperature-Average of 2cm and 6cm measurements	number	celsius			NAN=Missing or Not Measured
Ambient Vapor Pressure	Ambient Vapor Pressure	number	kilopascal			NAN=Missing or Not Measured
Incoming Shortwave	Incoming Shortwave	number	wattPerMeterSquared			NAN=Missing or Not Measured
Outgoing Shortwave	Outgoing Shortwave	number	wattPerMeterSquared			NAN=Missing or Not Measured
Incoming Longwave	Incoming Longwave	number	micromolePerMeterSquaredPerSecond			NAN=Missing or Not Measured
Outgoing Longwave	Outgoing Longwave	number	micromolePerMeterSquaredPerSecond			NAN=Missing or Not Measured
Net Radiation	Net Radiation	number	wattPerMeterSquared			NAN=Missing or Not Measured
Incoming PAR	Incoming photosynthetically active radiation	number	micromolePerMeterSquaredPerSecond			NAN=Missing or Not Measured
Outgoing PAR	Outgoing photosynthetically active radiation	number	micromolePerMeterSquaredPerSecond			NAN=Missing or Not Measured
IRGA AGC	Count of IRGA AGC flag	number	number			NAN=Missing or Not Measured
Friction Velocity	Calculated friction velocity	number	meterSquaredPerSecond			NAN=Missing or Not Measured
Wind Direction	Sonic pointed North	number	degree			NAN=Missing or Not Measured
Wind Speed	Wind Speed	number	meterPerSecond			NAN=Missing or Not Measured
Latent Heat Flux	Latent Heat Flux	number	wattPerMeterSquared			NAN=Missing or Not Measured
Sensible Heat Flux	Sensible Heat Flux	number	wattPerMeterSquared			NAN=Missing or Not Measured
Ground Heat Flux	Ground Heat Flux	number	wattPerMeterSquared			NAN=Missing or Not Measured
Net Ecosystem Exchange of CO2	Net Ecosystem Exchange of CO2	number	micromolePerMeterSquaredPerSecond			NAN=Missing or Not Measured

	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.