AmeriFlux site visit report and data for the Glacier Lakes Ecosystem Experiments Site (US-GLE)

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Frank, John M.
Originator: Massman, William J.
Originator: Chan, W. Stephen
Originator: Dengel, Sigrid
Originator: Biraud, Sébastien C.
Originator: Billesbach, David P.
Originator: Hanson, Chad V.
Publication_Date: 2019
Title:
AmeriFlux site visit report and data for the Glacier Lakes Ecosystem Experiments Site (US-GLE)
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2019-0013
Description:
Abstract:
This report and data summarize the AmeriFlux Tech team site visit to the Glacier Lakes Ecosystem Experiments Site (GLEES) in southeastern Wyoming. For this campaign, the AmeriFlux portable eddy covariance system (PECS) was deployed near the in situ GLEES micro-meteorological sensors. The resulting intercomparison of eddy covariance, radiation, and meteorological observations is used to inform key recommendations and improvements in the measurements. This package includes both the report and underlying data recorded by both the AmeriFlux PECS and the GLEES in situ instrumentation during the 14 day period in September 2016.
Purpose:
The AmeriFlux network of eddy covariance ecosystem flux sites was established to foster collaboration between different research groups with long term monitoring of the ecosystem exchange of water vapor, carbon dioxide, and energy between the land surface and the atmosphere. A service of the AmeriFlux Tech team is to perform periodic site visits across the network where the PECS is deployed and used as a baseline for comparing the accuracy between the various sites. The USDA Forest Service, Rocky Mountain Research Station managed GLEES site (US-GLE) has been active from 2004-present, with this being its third visit by the network.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20160906
Ending_Date: 20160919
Currentness_Reference:
Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As Needed
Spatial_Domain:
Description_of_Geographic_Extent:
GLEES is located in the Snowy Range mountains of the Medicine Bow National Forest in southeastern Wyoming (WY), 55 kilometers (km) west of Laramie, WY and 15 km northwest of Centennial, WY. GLEES constitutes approximately 600 hectares in and around the watersheds of East Glacier, West Glacier, and Brooklyn Lakes. The AmeriFlux site visit intercomparison was conducted atop of the GLEES AmeriFlux scaffold, which is located within the GLEES boundaries at 41.366417 (41° 21' 59.1") north and 106.239949 (106° 14' 23.8") degrees west with an elevation of about 3190 meters above sea level (UTM 396297 E, 4580176 N, NAD 83, Zone 13). GLEES is in a subalpine forest/alpine ecotone. Vegetation near the instrumentation is dominated by an Engelmann spruce and subalpine fir forest.
Bounding_Coordinates:
West_Bounding_Coordinate: -106.282
East_Bounding_Coordinate: -106.228
North_Bounding_Coordinate: 41.384
South_Bounding_Coordinate: 41.362
Bounding_Altitudes:
Altitude_Minimum: 3600
Altitude_Maximum: 3122
Altitude_Distance_Units: meters
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme_Keyword: climatologyMeteorologyAtmosphere
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Climate change
Theme_Keyword: Carbon
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Hydrology, watersheds, sedimentation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: eddy covariance
Theme_Keyword: AmeriFlux
Theme_Keyword: sonic anemometry
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Glacier Lakes Ecosystem Experiments Site
Place_Keyword: GLEES
Place_Keyword: Medicine Bow National Forest
Place_Keyword: Wyoming
Access_Constraints: None
Use_Constraints:
These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Frank, John M.; Massman, William J.; Chan, W. Stephen; Dengel, Sigrid; Biraud, Sébastien C.; Billesbach, David P.; Hanson, Chad V. 2019. AmeriFlux site visit report and data for the Glacier Lakes Ecosystem Experiments Site (US-GLE). Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2019-0013
Data_Set_Credit:
This study was funded by the USDA Forest Service, Rocky Mountain Research Station as well as The AmeriFlux Management Project, which is supported by the Office of Biological and Environmental Research in the U.S. Department of Education (DOE), Office of Science as part of Terrestrial Ecosystem Science Program under the Contract DE-AC0205CH11231 to the Lawrence Berkeley National Laboratory.
Cross_Reference:
Citation_Information:
Originator: Frank, John M.
Originator: Massman, William J.
Originator: Ewers, Brent E.
Originator: Williams, David G.
Publication_Date: 2018
Title:
Data and source code for "Bayesian analyses of seventeen winters of water vapor fluxes show bark beetles reduce sublimation"
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: Forest Service Research Data Archive
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2018-0032
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
This intercomparison can be interpreted as an accuracy report. In general, the statistical comparisons between the PECS and the in situ system quantify the possible uncertainties in the eddy covariance, radiation, and meteorological observations.
Logical_Consistency_Report:
The accuracy of the PECS is described in Schmidt et. al (2012).

The quality assurance/quality control (QA/QC) processing of the in situ GLEES system is summarized through each of these steps, referred to as versions.

QA/QC of the ambient meteorological data
Version 1.0 - Collating and preliminary QA/QC of original data
Version 1.1 - Diagnostic testing, despiking, and more QA/QC of data
Version 1.2 - Not used with the new scaffold
Version 1.3 - CO2 processing
Version 1.4 - CO2 processing and downsampling to 30 minute averages
Version 1.5 - WD and RH processing
Version 1.6 - Derived measurements calculated and data gap filled
Version 2.0 - Data was considered ready for release at this point

QA/QC of the fast-response eddy-covariance data.
Version 1.0 - Original time series data
Version 1.1 - Despiked time series data
Version 1.2 - Calibration adjusted time series data, first order statistics calculation, and QA/QC of data
Version 1.3 - Covariance calculation
Version 1.4 - Planar fit rotation
Version 1.5 - Time lag adjustment
Version 1.6 - Spectral correction
Version 1.7 - WPL correction


Schmidt, Andres; Hanson, Chad; Chan, W. Stephen; Law, Beverly E. 2012. Empirical assessment of uncertainties of meteorological parameters and turbulent fluxes in the AmeriFlux network. J. Geophys. Res. 117: G04014. https://doi.org/10.1029/2012JG002100
Completeness_Report:
Gaps in the dataset for individual measurements indicate periods where the entire measurement system was not operating correctly, which was generally related to weather. Since these data were used for intercomparison, no missing data were gap filled. Missing data are recorded as "NaN".
Lineage:
Methodology:
Methodology_Type: Field
Methodolgy_Identifier:
Methodolgy_Keyword_Thesaurus:
None
Methodology_Keyword: eddy covariance
Methodology_Description:
The USDA Forest Service, Rocky Mountain Research Station managed GLEES site (US-GLE) has been active from 2004-present, and is considered an AmeriFlux research site. In September 2016 the AmeriFlux Tech team came out to perform a periodic site visit to compare the AmeriFlux PECS sensors with the GLEES in situ data already being measured.

The GLEES in situ system is described as the following.

Eddy-covariance instrumentation:
-Sample rate: 20 hertz (Hz)
-Sonic anemometer: SATI/3Vx, Applied Technologies, Azimuth: 270°, Height on tower: 22.65 meters (m)
-Fast-response H2O/CO2 sensor: LI7500, Li-Cor, Location from sonic center: -0.235 m longitudinal (behind), 0.08 m lateral (south), vertically aligned.

Meteorological instrumentation:
-Temperature: RTD-810 resistance thermometer, Omega Engineering, Height on tower: 23.4 m
-Relative humidity: 083D, Met One Instruments, Height on tower: 23.4 m
-Wind velocity and direction: 05103-5 Wind Monitor, R.M. Young Company, Height on tower: 25.8 m
-Pressure: 61202V Barometric pressure sensor, R.M. Young, Height on tower: 23.4 m
-Net radiation: Q*5.571 Net Radiometer, Radiation and Energy Balance Systems, Height on tower: 24.4 m
-4 way net radiation: PSP and PIR (downwelling and upwelling), Eppley Laboratory, Height on tower: 24.4 m
-PAR: LI-190SA Quantum Sensor (downwelling and upwelling), Li-Cor, Height on tower: 24.4 m

CO2 canopy profile:
-Location: A vertical profiles on the scaffolding with inlets at 22.65, 19.3, 16.1, 12.9, 9.7, 6.5, 3.3, and 0.1 m. The profile system cycles through the 8 tubes once per minute.
-Fast-response H2O/CO2 sensor: LI7000, Li-Cor

The AmeriFlux PECS1 sensors were deployed on the GLEES AmeriFlux scaffold to minimize separation, both horizontal and vertical, from the in situ sensors to avoid interfering with existing infrastructure and to prevent shadowing or wake effects (i.e., generally within 1-2 meters). The AmeriFlux PECS1 was deployed with two infrared gas analyzers (an enclosed-path, LI-7200, and an open-path analyzer, LI-7500A). Both gas analyzers are calibrated prior to and after each deployment, with this comparison focusing on the AmeriFlux open-path IRGA as it is similar to the in situ eddy covariance system. Data processing of the AmeriFlux PECS1 data was handled by EddyPro® (Version 5.2.1), an open-source eddy covariance software package developed by LI-COR (http://licor.com/env/products/eddy_covariance/software.html). The system was checked daily by the AmeriFlux Tech team and removed after 14 days of deployment.

Site visits generally occur every 4-6 years, with this being the 3rd visit to the GLEES AmeriFlux scaffold. Additional details about the methodology of the PECS and the AmeriFlux Tech team site visits are described in Schmidt et al. (2012).
Methodology_Citation:
Citation_Information:
Originator: Schmidt, Andres
Originator: Hanson, Chad
Originator: Chan, W. Stephen
Originator: Law, Beverly E.
Publication_Date: 2012
Title:
Empirical assessment of uncertainties of meteorological parameters and turbulent fluxes in the AmeriFlux network
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: J. Geophys. Res.
Issue_Identification: 117: G04014
Online_Linkage: https://doi.org/10.1029/2012JG002100
Methodology_Citation:
Citation_Information:
Originator: Frank, John M.
Originator: Massman, William J.
Originator: Ewers, Brent E.
Originator: Williams, David G.
Publication_Date: 2018
Title:
Data and source code for "Bayesian analyses of seventeen winters of water vapor fluxes show bark beetles reduce sublimation"
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: Forest Service Research Data Archive
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2018-0032
Process_Step:
Process_Description:
See methodology section
Process_Date: Unknown
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
This publication contains data from the 2016 AmeriFlux site visit report for the Glacier Lakes Ecosystem Experiments Site (US-GLE). Two files are included in the download.

\Data\AmeriFlux_Site_Visit_US_GLE_2016.csv: Comma delimited ASCII text file with half-hour micrometeorological data from the AmeriFlux Portable Eddy Covariance System (PECS) and the in situ GLEES sensors. The file contains 672 rows of the following variables:
(1) timestamp, PECS = Decimal day referenced to January 1, 0 AD
(2) timestamp, in situ = Decimal day of year 2016
(3) CO2 flux, PECS = Carbon dioxide (CO2) turbulent flux (micromoles per square meter per second [umol/m2/s])
(4) CO2 flux, in situ = CO2 turbulent flux (umol/m2/s)
(5) Latent heat, PECS = Latent heat flux (Watts per square meter [W/m2])
(6) Latent heat, in situ = Latent heat flux (W/m2)
(7) Sensible heat, PECS = Sensible heat flux (W/m2)
(8) Sensible heat, in situ = Sensible heat flux (W/m2)
(9) u star, PECS = Friction velocity (meters per second [m/s])
(10) u star, in situ = Friction velocity (m/s)
(11) u_{rot}, PECS = Sonic anemometer wind velocity (m/s)
(12) u_{rot}, in situ = Sonic anemometer wind velocity (m/s)
(13) Ts, PECS = Sonic anemometer temperature (Celsius [C])
(14) Ts, in situ = Sonic anemometer temperature (C)
(15) var(u)_{rot}, PECS = Horizontal wind variance (m2/s2)
(16) var(u)_{rot}, in situ = Horizontal wind variance (m2/s2)
(17) var(v)_{rot}, PECS = Crosswind horizontal wind variance (m2/s2)
(18) var(v)_{rot}, in situ = Crosswind horizontal wind variance (m2/s2)
(19) var(w)_{rot}, PECS = Vertical wind variance (m2/s2)
(20) var(w)_{rot}, in situ = Vertical wind variance (m2/s2)
(21) var(Ts), PECS = Sonic anemometer temperature variance (C2)
(22) var(Ts), in situ = Sonic anemometer temperature variance (C2)
(23) CO_2, PECS = CO2 density (millimole per cubic meters [mmol/m3])
(24) CO_2, in situ = CO2 density (mmol/m3)
(25) H_2O, PECS = Water (H2O) density (mmol/m3)
(26) H_2O, in situ = H2O density (mmol/m3)
(27) var(CO_2), PECS = CO2 variance (mmol2/m6)
(28) var(CO_2), in situ = CO2 variance (mmol2/m6)
(29) var(H_2O), PECS = H2O variance (mmol2/m6)
(30) var(H_2O), in situ = H2O variance (mmol2/m6)
(31) w'T', PECS = Vertical wind/temperature covariance (m/s C)
(32) w'T', in situ = Vertical wind/temperature covariance (m/s C)
(33) w'CO_2', PECS = Vertical wind/CO2 covariance (mmol/m2/s)
(34) w'CO_2', in situ = Vertical wind/CO2 covariance (mmol/m2/s)
(35) w'H_2O', PECS = Vertical wind/H2O covariance (mmol/m2/s)
(36) w'H_2O', in situ = Vertical wind/H2O covariance (mmol/m2/s)
(37) Wind spd, PECS = Wind velocity (m/s)
(38) Wind spd, in situ = Wind velocity (m/s)
(39) Wind dir, PECS = Wind direction (degrees)
(40) Wind dir, in situ = Wind direction (degrees)

\Supplements\AmeriFlux_Site_Visit_US_GLE_2016_report.pdf: Adobe Acrobat PDF/a file containing the 2016 AmeriFlux site visit report for the Glacier Lakes Ecosystem Experiments Site (US-GLE).
Entity_and_Attribute_Detail_Citation:
See the site visit report included in this data publication.
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Research and Development
Contact_Position: Research Data Archivist
Contact_Address:
Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: CO
Postal_Code: 80526
Country: USA
Contact_Voice_Telephone: see Contact Instructions
Contact Instructions: This contact information was current as of April 2019. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Resource_Description: RDS-2019-0013
Distribution_Liability:
Metadata documents have been reviewed for accuracy and completeness. Unless otherwise stated, all data and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. However, neither the author, the Archive, nor any part of the federal government can assure the reliability or suitability of these data for a particular purpose. The act of distribution shall not constitute any such warranty, and no responsibility is assumed for a user's application of these data or related materials.

The metadata, data, or related materials may be updated without notification. If a user believes errors are present in the metadata, data or related materials, please use the information in (1) Identification Information: Point of Contact, (2) Metadata Reference: Metadata Contact, or (3) Distribution Information: Distributor to notify the author or the Archive of the issues.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Version_Number: see Format Specification
Format_Specification:
Comma-delimited ASCII text file (CSV)
File_Decompression_Technique: Files zipped with 7-Zip 18.05
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/RDS-2019-0013
Digital_Form:
Digital_Transfer_Information:
Format_Name: PDF
Format_Version_Number: see Format Specification
Format_Specification:
Adobe Acrobat PDF or PDF/a file
File_Decompression_Technique: Files zipped with 7-Zip 18.05
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/RDS-2019-0013
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20190412
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John Frank
Contact_Organization: USDA Forest Service, Rocky Mountain Research Station
Contact_Position: Electronics Engineer
Contact_Address:
Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: CO
Postal_Code: 80526
Country: USA
Contact_Voice_Telephone: 970-498-1319
Contact_Electronic_Mail_Address: john.frank@usda.gov
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
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