Plot descriptions and location data from datalogger, 1m x 1m chamber flux and point frame plots sampled near Toolik Field Station in Alaska the summer of 2012.

Abstract: 

"2012_GS_PFandCH_GPS" contains GPS locations of all datalogger, 1m x 1m chamber flux and point frame plots sampled IVO Toolik Field Station in Alaska during the summer of 2012. The sorting variables (YEAR, DATE, SITE, GROUP, PLOT, TREAT, PLOT SIZE) are identical to those in other files with data collected that season. The main purpose of this file is for reference and as an aid in interpretation of data analyses and among-site comparisons.

Project Keywords: 

Data set ID: 

10138

EML revision ID: 

6
Published on EDI/LTER Data Portal

Citation: 

Shaver, G. 2012. Plot descriptions and location data from datalogger, 1m x 1m chamber flux and point frame plots sampled near Toolik Field Station in Alaska the summer of 2012. Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/926e2979102d5d34c193582969a97bca
People

Owner/Creator: 

Contact: 

Additional People: 

Data Manager
Field Crew
Associated Researcher
Associated Researcher
Dates

Date Range: 

Saturday, June 23, 2012 to Tuesday, August 7, 2012

Publication Date: 

2012

Methods: 

For the point frame (PF) and chamber flux (CH) measurements, GPS coordinates were measured with a handheld Garmin Etrex GPS unit while tracking at least five satellites.

Elevation for all sites was estimated from GoogleEarth; where position measurements were not recorded in the field, such as with the sites of dataloggers and monitoring sites, the position was also estimated from GoogleEarth maps.

Datalogger Sites - PAR and Relative Humidity
In order to monitor canopy conditions of the shrub species of interest--Betula nana and Salix pulchra--two CR1000 dataloggers (Campbell Scientific, 815 W. 1800, North Logan, UT, USA) were installed at the sites used for the ITEX shrub canopy studies at Toolik Field Station in Alaska the summer of 2012. The sites (see "Group" category) are labeled as "Upland" and "Outlet"--descriptions of the sample site in relation to Toolik Lake. The Upland site is colocated with Block 1 of the LTER shrub vegetation plots; the Outlet site is colocated with Block 2. The dataloggers were adjacent to, rather than within, LTER plots with the exception of B2BET which was located within the control (CT) plot of the LTER Shrub Block 2.

The following sensors were located at each datalogger site [B1BET, B1SALP, B2BET, B2SALP]:
PAR (LI-190SB Quantum Sensor):
(1) Mid-way within the canopy (approximately 40 cm above the soil)
(1) Below the canopy (approximately 10 cm above the soil)
Relative humidity (RH) and temperature sensors: HMP50/HMP60 Probe :
(1) Below the canopy (approximately 10 cm above the soil)

BF3 Data Logging
Whenever possible, the beam fraction sensor (BF3 sensor, manufactured by Delta-T Devices Ltd, Burwell Cambridge, UK) was programmed to log total and diffuse irradiance every five minutes on a CR800 datalogger (Campbell Scientific, 815 W. 1800, North Logan, UT, USA). The site initially chosen for this was behind a laboratory near Toolik Lake; this site was called "Lab2". While at least 10 meters from the nearest structure, it was thought that the proximity of the lab buildings might influence or even shade the BF3 sensor at low sun angles. Thus a second site was chosen--"Toolik Gate". This site is located at the entrance to the gravel pad of Toolik Field Station and had no nearby structures that could interfere with the BF3 readings.

Version Changes: 

This was a season-long project, though it followed similar methods to ITEX projects performed starting in 2003 that are likely to be replicated in the future for reasearch at the Toolik Field Station, AK.
Version 2: Discrepancy with file name fixed. Missing values changed to #N/A. CH 28Jan2013
Version 3: Metadata updated to newer form (with sites sheet). CH April 2013.
Version 4: Corrected eml excel file name wrong extension. JimL 16May13
Version 5: Corrected Distrubution URL. It had xlsfiles in the path. Jim L 19Jun14
Version 6: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

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To cite this data set see the citation example on the LTER Network Data Portal page for this data set.

File 2012_GS_PFandCH_GPS.csv

Plot descriptions and... File Details

File 2012_GS_PFandCH_GPS.xlsx

Excel file with... File Details