Glacier Lakes Ecosystem Experiments Site (GLEES) hourly meteorology tower data: 1989-2005

Metadata:

Identification_Information
Data_Quality_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: John L. Korfmacher

Originator: Douglas M. Hultstrand

Publication_Date: 2006

Title:

Geospatial_Data_Presentation_Form: tabular digital data

Publication_Information:

Publication_Place: Fort Collins, CO
Publisher: USDA Forest Service, Rocky Mountain Research Station

Other_Citation_Details:

doi:10.2737/RDS-2006-0003

Online_Linkage: http://dx.doi.org/10.2737/RDS-2006-0003

Description:

Abstract:: This dataset contains hourly meteorological tower data collected from 1989-2005 at the Glacier Lakes Ecosystem Experiments Site (GLEES), in the Snowy Range near Centennial, Wyoming.
Purpose:: The GLEES, a 600 hectare research watershed at 3200-3400 meters elevation in the Snowy Range of southeastern Wyoming, was established in 1987 to examine the effects of atmospheric deposition on alpine and subalpine ecosystems. The site is not in a designated wilderness area, but was selected for research because it closely replicates conditions in federally designated Class I wilderness.
Supplemental_Information:: Additional information about the Glacier Lakes Ecosystem Experiments Site can be found at http://www.fs.fed.us/rm/landscapes/Locations/Glees/GLEES.shtml.

Original metadata date was 10/03/06. Metadata modified on 02/08/11 to include the addition of a DOI (digital object identifier).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19890101
Ending_Date: 20051231

Currentness_Reference:

observed

Status:

Progress: In work
Maintenance_and_Update_Frequency: Annually

Spatial_Domain:

Description_of_Geographic_Extent:

The GLEES constitutes approximately 600 hectares in and around the watersheds of East Glacier, West Glacier, and Brooklyn Lakes, located in the Medicine Bow National Forest in the Snowy Range in southeastern Wyoming. Common species in this area are Picea englemannii and Abies lasiocarpa. The meteorology tower where these data were collected is in the southern corner of the West Glacier Lake watershed. The collection point is a 15-meter tower southeast of the outlet of West Glacier Lake. The tower is locationed at approximately 3300 meters elevation.

Bounding_Coordinates:

West_Bounding_Coordinate: -106.282
East_Bounding_Coordinate: -106.22800
North_Bounding_Coordinate: 41.38400
South_Bounding_Coordinate: 41.362
Bounding_Altitudes:

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: meteorology
Theme_Keyword: subalpine

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Wyoming
Place_Keyword: Snowy Range
Place_Keyword: Glacier Lakes
Place_Keyword: Glacier Lakes Experimental Site

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 1989-2005

Access_Constraints: None

Use_Constraints:

These data were collected by USDA Forest Service researchers 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 citation below when citing the dataset:

Korfmacher, John L. and Hultstrand, Douglas M. 2006. Glacier Lakes Ecosystem Experiments Site hourly meteorology tower data: 1989-2005. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. doi:10.2737/RDS-2006-0003

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Robert C. Musselman
Contact_Organization: USDA Forest Service, Rocky Mountain Research Station, Unit RWU4352

Contact_Position: GLEES Administrator

Contact_Address:

Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: Colorado
Postal_Code: 80526

Contact_Voice_Telephone: 970-498-1239

Data_Set_Credit:

R.C. Musselman, J. Frank, A. Ellsworth, and other past employees have assisted in the collection of these data through field and technical assistance.

Native_Data_Set_Environment:

Original files are Microsoft Excel 2002 spreadsheets. Final file formats are comma-delimited ascii text files.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: Precision of measurements corresponds to the number of decimal places indicated for each variable, e.g., scalar windspeed is considered precise to the nearest 0.01 meter per second. Accuracy of measurements is governed by the equipment used. Equipment was checked weekly to ensure correct function, and was repaired as necessary. Data recorded by obviously malfunctioning sensors were deleted.

Logical_Consistency_Report:

Initial quality assurance / quality control (QA/QC) checks were done graphically for all data and obvious outliers were eliminated. A systematic error of about 160 compass degrees occurred in all wind direction data collected from mid-May, 1995 to mid-September, 1996. The data were corrected. Additional post-collection processing was required for precipitation. The sensor recorded gage depth, which was subject to changes due to evaporation and recharge of the gage antifreeze. Precipitation level was rounded to the nearest millimeter, and the differential from one hour to the next was recorded as the amount of precipitation received during that hour. It was assumed that when zero or negative values (e.g., due to evaporation) were recorded that no precipitation was received during that hour.
Further QA/QC was conducted by comparing the data graphically to data collected with instrumentation nearby at the National Atmospheric Deposition Program (NADP) site WY00, located approximately 250 meters northwest of the Glacier Lakes meteorology tower. A number of additional minor errors were corrected.

Completeness_Report:

Gaps in the dataset for individual parameters are due to instrument malfunction, replacement, and/or calibration of the instrument. Gaps for all data indicate periods where the entire sensor array was not operating, e.g., failure of power supply, or datalogger malfunction. The files contain records for the entire period of measurement; where data were missing, null records were inserted to bring each datafile to a uniform size of 8670 hourly records (8784 in leap years).

Lineage:

Methodology:

Methodology_Type: Field
Methodology_Description:: The facilities used to collect these data were installed in 1987, although meteorological data have been collected in the area, by various agencies, since the 1960's. Each meteorological parameter was sampled every ten seconds, and mean or sum values, as appropriate, were recorded by a datalogger every hour. Blank spreadsheet cells indicate missing, inaccurate, or unobserved data. The tower used is 15 meters in height and rises above the tops of surrounding subalpine forest. Instrumentation on the tower consists of Met One anemometer, wind direction indicator and combination humidity/temperature sensor; LI-COR pyranometer, and RM Young wetness sensor. Dataloggers in use on the site are Campbell Scientific models CR-21 (1989-2002) and CR-23X (2002-present). Power is supplied by a 10W solar panel. Precipitation is measured using an alter-shielded Belfort raingage. The gage is located 20 meters east of the tower and the opening is 3 meters above the ground. The weight of the gage bucket is converted to an electric resistance signal read by the datalogger. Workers visit the site weekly, year-round, to inspect instrumentation and retrieve datalogger memory storage modules. Malfunctioning equipment is either repaired immediately or on the next weekly visit.

Process_Step:

Process_Description:: Datalogger storage modules are retrieved from the site weekly, returned to the laboratory, and downloaded. Data are inspected for obvious outliers and are stored in ASCII comma-delimited format as separate weekly files. The weekly files are then combined into one file for each year and stored as Microsoft Excel spreadsheets. Precipitation then goes through the post-collection process of rounding to the nearest millimeter, and then calculating the differential from one hour to the next as the amount of precipitation received during that hour. For more information see the Logical Consistency Report above.
Process_Date: Unknown

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:: Dataset includes:
YEAR=Calendar year;
MONTH=calendar month;
J_DAY=serial or Julian day of calendar year; TIME=time of day (0000 to 2400 hours);
DATE=day of calendar year (month/day/year);
DEC_DAY=serial date of calendar year in decimal equivalent (=J_DAY+TIME/2400);
SITE_ID=identifier to distinguish these data from data collected at other meteorology sites at the GLEES. This is 'gg/gl' for all of these files;
PPT=precipitation in millimeters;
TAIR=air temperature in degrees celsius;
TAIR_SD=standard deviation of air temperature in degrees celsius;
RAD=solar radiation in Watts/square meter;
RAD_SD=standard deviation of solar radiation in Watts/square meter;
RH=relative humidity in percent;
RH_SD=standard deviation of relative humidity;
WS=scalar wind speed in meters/second;
WSVM=vector or net wind speed in meters/second. This parameter was no longer collected after October, 1994;
WS_SD=standard deviation of scalar wind speed in meters/second;
WD=wind direction in compass degrees; WD_SD=standard deviation of wind direction in compass degrees;
TS05=soil temperature in degrees celsius at 5 centimeters below the surface;
TS20=soil temperature in degrees celsius at 20 centimeters below the surface;
DRY and WET=step function for wetness sensor (when the sensor was wet, value is 1; when dry, value is 0).
Entity_and_Attribute_Detail_Citation:: None

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USDA Forest Service, Rocky Mountain Research Station

Contact_Position: Station Archivist

Contact_Address:

Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: Colorado
Postal_Code: 80526

Contact_Voice_Telephone: 970-498-1206

Contact_Voice_Telephone: 970-498-1100

Distribution_Liability:

This metadata document has been reviewed for accuracy and completeness. The data are considered to satisfy the Rocky Mountain Research Station's quality standards relative to the purpose for which the data were collected. However, the Forest Service cannot 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 by the Forest Service 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 Forest Service of the issues. Additional information is available at http://www.fs.fed.us/qoi.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: CSV
Format_Version_Date: 2005
File_Decompression_Technique: Files in this data product were zipped using WinZip.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://www.fs.fed.us/rm/data_archive

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20110208

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USDA Forest Service, Rocky Mountain Research Station, Statistics Unit

Contact_Position: Station Archivist

Contact_Address:

Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: Colorado
Postal_Code: 80526

Contact_Voice_Telephone: 970-498-1206

Contact_Voice_Telephone: 970-498-1100

Metadata_Standard_Name: Content Standard for National Biological Information Infrastructure Metadata

Metadata_Standard_Version: FGDC-STD-001.1-1999