uid=ARC,o=lter,dc=ecoinformatics,dc=org all public read 2012_GS_ITEX_BF3_DiffuseLightData.02 Arctic LTER Program Gaius Shaver

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Arctic LTER Program

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ Edward Rastetter

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Associated Researcher Mathew Williams

University of Edinburgh School of Geosciences Darwin Building Edinburgh EH9 EJU United Kingdom

Associated Researcher James Laundre

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Data Manager Laura van der Pol

Ecosystems Center at the Marine Biological Laboratory 7 MBL Street Woods Hole MA 02543 United States

Field Crew 2013 This file contains irradiance (PAR) and diffuse light data logged from a beam fraction (BF3) sensor near Toolik Lake, Alaska during the summer of 2012. The data comes from a compilation of automated datalogger readings as well as measurements taken during the field season in conjunction with the Delta-T SunScan wand to measure PAR in tall shrub canopies dominated by Betula nana or Salix pulchra species. The sensor was leveled and mounted to a 2m tripod in each location, and programmed to record instantaneous readings in 30 second to 5 minute intervals. photosynthesis shrub canopy diffuse light fraction total irradiance chamber flux point frame datalogger photosynthetica active radiation PAR Acceptance and utilization of LTER data requires that: The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions. The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications A copy of any resultant publications should be sent to: Principal Investigator Ecosystems Center Marine Biological Laboratory Woods Hole, MA 02543 http://ecosystems.mbl.edu/ARC/meta_template.php?FileName=./terrest/tracegas/xlsfiles/2012_GS_ITEX_BF3_DiffuseLightData.html Upland site; co-located in Block 1 of the Shrub LTER sites; IVO 68° 38'18.8" N, 149° 34' 07.2" W +/- 50m. Plots are outside of the designated LTER treatments, though are exposed to the same environmental conditions. All plots were chosen by the dominant shrub canopy (either Salix pulchraor Betula nana) and preferentially selected to be 90cm+ in height. -149.568666666666 -149.568666666666 68.6385555555555 68.6385555555555 Outlet site; co-located in Block 2 of the Shrub LTER sites; IVO 68° 38'008.1" N, 149° 35' 017.1" W +/- 50m. Plots are outside of the designated LTER treatments, though are exposed to the same environmental conditions. All plots were chosen by the dominant shrub canopy (either Salix pulchraor Betula nana) and preferentially selected to be 90cm+ in height. -149.588083333333 -149.588083333333 68.6355833333333 68.6355833333333 Lab2; used briefly as a location for the beam fraction sensor (BF3) to autolog. This site is located on the shore of Toolik Lake behind the Lab 2 building. It was chosen for convenient access, though ultimately was changed because of the prevalence of nearby structures. -149.598469444444 -149.598469444444 68.6271861111111 68.6271861111111 Toolik Gate; this was the preferred logging location for the beam fraction sensor (BF3). This site was located just up the road from the entrance to the field station. It was chosen for the complete absence of nearby structures and the ease of access. -149.585425 -149.585425 68.6272416666666 68.6272416666666 2012-06-23 2012-08-08 Organisms Studied Genus Betula Species nana Genus Salix Species pulchra 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. Updated Metadata sheet Version 2: Updated metadata to newer form (with sites sheet). CH April 2013. Data Manager

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ ARC LTER

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_im@mbl.edu http://ecosystems.mbl.edu/ARC/ This dataset is a compilation of data taken with the beam fraction sensor (called the BF3 sensor, manufactured by Delta-T Devices Ltd, Burwell Cambridge, UK) during the summer of 2012 at the Toolik Field Station in Alaska. While the goal was for the BF3 sensor to monitor conditions continuously throughout the growing season, the sensor experienced frequent malfunctions, causing there to be significant gaps in the data record. As this is a compilation of time when the BF3 sensor was logging, the interval between measurements and the device regulating the data collection vary. Before describing the methods used in each kind of collection, it is useful to describe the BF3 set-up that was common to all collection times: * The BF3 sensor was mounted and leveled on the tripod sent with the instrument from the manufacturer (at height approximately 2 m) every time it was used. Care was taken to ensure that the BF3 was not near any structures that might influence the PAR readings, and that it would not be located in a highly trafficked area. * The BF3 sensor consists of seven PAR sensors arranged in a mathematically formulated way and shaded with a uniquely shaped "shield" that enables the device to calculate the fraction of diffuse light regardless of the sun angle or time of day. This "shield" has a strip through the center that is open through the diameter of the hemisphere where the PAR sensors are located. As recommended by the manufacturer, this open strip was always arranged such that it was oriented in an East - West direction. [This supposedly ensures one PAR sensor will always be shaded; an important component to the BF3 calculations. See the BF3 Instruction manual for further details.] BF3 Data Logging with a CR800 Whenever possible, the beam fraction sensor 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 automated logging 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. The positions and elevations of these sites were estimated from GoogleEarth maps. Autologging during Chamber Flux or Point Frame Measurements For the duration of fielld days when chamber flux (CH) or point frame (PF) measurements were being made, the BF3 sensor was set to autolog with the Trimble PDA and SunScan wand (also Delta-T) designed for use with the BF3 sensor. The log interval was set to take an instantaneous reading either every sixty or thirty seconds. The location of the sensor was within five meters of the latitude and longitude associated with the "Plot" listed on the data page, though the exact position of the BF3 sensor was not recorded. 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. In some cases, the SunScan wand (which logs 64-PAR readings along the 1-m wand in synch with the BF3 sensor) was placed beneath a plot previously sampled. In these intances, the Plot ID of the canopy associated with the SunScan wand is listed in the "Notes" section. The raw output of these PAR readings are listed in PAR 1... PAR 64(tip). SunScan PAR Measurements: The SunScan wand was used to characterize PAR at many heights within each canopy; as the BF3 sensor was also used for these measurements, those data have been included here as ambient BF3 and total irradiance data. The PAR data for all plots are summarized in the file, "SunScan_PAR" , and the collection methods are summarized here: The methods used to collect PAR at many heights within each canopy were the same used to collect LAI (see "SunScan_LAI_Data"), the primary difference being the settings in the Delta-T software. We measured PAR at 64 points within a 1-m horizontal profile using a DeltaT SunScan wand in conjuction with the BF3 sensor . The BF3 sensor recorded total irradiance and incident diffuse light simultaneously with the SunScan wand's 64-PAR readings evenly spaced along the 1m long wand. Readings were taken by inserting the SunScan wand as near to the ground as possible--typically ~5cm from the ground as the wand rested on top of moss--and then measured vertically every 15 cm with the last measurement being above the canopy. Measurements were taken from the side of the chamber or point frame opposite the sun at three locations for each height under both direct (ambient) and diffuse light conditions. In many cases the replicates at each height were differentiated by row (1-3, or occasionaly 3-8 which correspond to the point frame pins). Typically diffuse light conditions were achieved by shading only the shrub canopy with photographic diffuser panels (the BF3 sensor was not shaded). On occasion, measurements were taken during cloudy light conditions where the diffuse light fraction was greater than 0.7 and no diffuser panel was needed; on these occasions the direct and diffuse light estimates may have been taken in slightly different locations as they were taken at different times and the precise position of the SunScan wand could not be replicated exactly. pers-1 For Delta-T SunScan wand used to measure PAR and LAI: SS1 User Manual v2.0. Delta-T Devices Ltd., May 19, 2008. User Manual for the Sunshine Sensor type BF3 v1.0. Delta-T ltd., May 2002. Gus Shaver

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 gshaver@mbl.edu Lead PI Jim Laundre

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7496 arc_imr@mbl.edu Information Manager The goal of Arctic LTER project is to predict the future ecological characteristics of the site based upon our knowledge of the controls of ecosystem structure and function as exerted by physical setting and geologic factors, climatic factors, biotic factors, and the changes in fluxes of water and materials from land to water. To achieve this goal the Arctic LTER uses several approaches: Long-term monitoring and surveys of natural variation of ecosystem characteristics in space and time. Includes: climate, plant communities and productivity, thaw depth, stream flow, chemistry of streams and lakes, temperatures of streams and lakes, lake chlorophyll lake productivity, zooplankton abundance. Experimental manipulation of ecosystems for years and decades. Includes: tundra warming, shading, and fertilizing, grazer exclusions, fertilization of lakes and streams, addition and subtraction of predators. Synthesis of results and predictive modeling at ecosystem and watershed scales. Includes: stream N cycling, lake physics, bioenergetics of fish populations, water movement and transfer of DOC and nutrients from land to water, soil respiration, cycling and storage of C in tundra under different scenarios of future climates. 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. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The Arctic LTER research site (68°N and 149°W) is in the foothills region of the North Slope of Alaska and includes the entire Toolik Lake watershed and the adjacent watershed of the upper Kuparuk River, down to the confluence of these two watersheds. This area is typical of the northern foothills of the Brooks Range, with continuous permafrost, no trees, a complete snow cover for 7 to 9 months, winter ice cover on lakes, streams, and ocean, and cessation of river flow during the winter. Tussock tundra vegetation of sedges and grasses mixed with dwarf birch and low willows form the dominant vegetation type with areas of drier heath tundra on ridge tops and other well-drained sites as well as areas of river-bottom willow communities. -149.75 -149.0433 68.8 68.5 610 1360 meter 2012_GS_ITEX_BF3_DiffuseLightData.csv Total and diffuse photosynthetically active radiation (PAR) recorded by a beam fraction (BF3) sensor during the summer of 2012 in vicinity of Toolik Lake, Alaska. 2012_GS_ITEX_BF3_DiffuseLightData.csv 1 \r\n column , " http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10133&urlTail=terrest/tracegas/data/2012_GS_ITEX_BF3_DiffuseLightData.csv YEAR YEAR year of measurement yyyy DATE DATE Date of measurement dd-mon-yy TIMESTAMP TIMESTAMP Date and 24-hour time of measurement m/dd/yyyy hh24:mi SITE SITE Toolik (e.g. Toolik Field Station or TFS) Toolik (e.g. Toolik Field Station or TFS) GROUP GROUP Upland and Outlet sites are descriptions in relation to Toolik Lake LTER Shrub plots; In vicinity of Block1 = Upland, IVO Block 2 = Outlet; measurements were occasionally logged behind Lab 2 at Toolik Field Station (TFS); they were also logged near the entrance gate to TFS (Toolik gate) due to the absence of obstructions. Upland and Outlet sites are descriptions in relation to Toolik Lake LTER Shrub plots; In vicinity of Block1 = Upland, IVO Block 2 = Outlet; measurements were occasionally logged behind Lab 2 at Toolik Field Station (TFS); they were also logged near the entrance gate to TFS (Toolik gate) due to the absence of obstructions. DOM VEG DOM VEG Where applicable, this vegetation refers to the dominant shrub canopy species associated with the specific "Plot"; the BF3 was alwayss kept above all vegetation when logging. Where applicable, this vegetation refers to the dominant shrub canopy species associated with the specific "Plot"; the BF3 was alwayss kept above all vegetation when logging. TREATMENT TREATMENT Where applicable, the treatment associated with the specific "Plot". Where applicable, the treatment associated with the specific "Plot". MEASUREMENT MEASUREMENT Type of measurement this data was recorded for (e.g. chamber flux, point frame, or recorded by a datalogger) Type of measurement this data was recorded for (e.g. chamber flux, point frame, or recorded by a datalogger) PLOT PLOT Where applicable, refers to Individual plot identifier Where applicable, refers to Individual plot identifier N LAT N LAT Latitude IVO where BF3 was logging (+/- 5m) decimal degrees N degree real NaN Missing or Not Measured W LONG W LONG Longitude IVO where BF3 was logging (+/- 5 m) decimal degress W degree real NaN Missing or Not Measured ELEVATION ELEVATION GoogleEarth elevation estimate (m above sea level) meter real NaN Missing or Not Measured TIME TIME 24-hour time of measurement hh24:mi:ss NaN Missing or Not Measured ID_1 ID_1 SunScan file record number 1 associated with measurement SunScan file record number 1 associated with measurement ID_2 ID_2 SunScan file record number 2 or datalogger record nuimber associated with measurement SunScan file record number 2 or datalogger record nuimber associated with measurement SunScan WAND AVG SunScan WAND AVG Where applicable, average of 64-PAR sensors on the SunScan wand micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured WAND SPREAD WAND SPREAD Where applicable, standard deviation of the 64-PAR sensors on the SunScan wand (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured BF3 TOT IRRAD BF3 TOT IRRAD Total irradiance (direct and diffuse) measured by the BF3 sensor (umol total PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured BF3 DIFFUSE BF3 DIFFUSE Total diffuse light measured by the BF3 sensor (umol diffuse PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured DIFFUSE LIGHT FRACTION DIFFUSE LIGHT FRACTION Fraction (%) of diffuse light = (Diffuse Light) / (Total Irradiance); measured by BF3 sensor micromolePerMicromole real NaN Missing or Not Measured PAR 1 PAR 1 Individual PAR reading for each PAR sensor 1; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 2 PAR 2 Individual PAR reading for each PAR sensor 2; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 3 PAR 3 Individual PAR reading for each PAR sensor 3; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 4 PAR 4 Individual PAR reading for each PAR sensor 4; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 5 PAR 5 Individual PAR reading for each PAR sensor 5; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 6 PAR 6 Individual PAR reading for each PAR sensor 6; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 7 PAR 7 Individual PAR reading for each PAR sensor 7; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 8 PAR 8 Individual PAR reading for each PAR sensor 8; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 9 PAR 9 Individual PAR reading for each PAR sensor 9; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 10 PAR 10 Individual PAR reading for each PAR sensor 10; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 11 PAR 11 Individual PAR reading for each PAR sensor 11; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 12 PAR 12 Individual PAR reading for each PAR sensor 12; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 13 PAR 13 Individual PAR reading for each PAR sensor 13; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 14 PAR 14 Individual PAR reading for each PAR sensor 14; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 15 PAR 15 Individual PAR reading for each PAR sensor 15; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 16 PAR 16 Individual PAR reading for each PAR sensor 16; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 17 PAR 17 Individual PAR reading for each PAR sensor 17; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 18 PAR 18 Individual PAR reading for each PAR sensor 18; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 19 PAR 19 Individual PAR reading for each PAR sensor 19; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 20 PAR 20 Individual PAR reading for each PAR sensor 20; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 21 PAR 21 Individual PAR reading for each PAR sensor 21; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 22 PAR 22 Individual PAR reading for each PAR sensor 22; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 23 PAR 23 Individual PAR reading for each PAR sensor 23; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 24 PAR 24 Individual PAR reading for each PAR sensor 24; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 25 PAR 25 Individual PAR reading for each PAR sensor 25; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 26 PAR 26 Individual PAR reading for each PAR sensor 26; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 27 PAR 27 Individual PAR reading for each PAR sensor 27; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 28 PAR 28 Individual PAR reading for each PAR sensor 28; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 29 PAR 29 Individual PAR reading for each PAR sensor 29; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 30 PAR 30 Individual PAR reading for each PAR sensor 30; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 31 PAR 31 Individual PAR reading for each PAR sensor 31; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 32 PAR 32 Individual PAR reading for each PAR sensor 32; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 33 PAR 33 Individual PAR reading for each PAR sensor 33; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 34 PAR 34 Individual PAR reading for each PAR sensor 34; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 35 PAR 35 Individual PAR reading for each PAR sensor 35; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 36 PAR 36 Individual PAR reading for each PAR sensor 36; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 37 PAR 37 Individual PAR reading for each PAR sensor 37; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 38 PAR 38 Individual PAR reading for each PAR sensor 38; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 39 PAR 39 Individual PAR reading for each PAR sensor 39; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 40 PAR 40 Individual PAR reading for each PAR sensor 40; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 41 PAR 41 Individual PAR reading for each PAR sensor 41; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 42 PAR 42 Individual PAR reading for each PAR sensor 42; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 43 PAR 43 Individual PAR reading for each PAR sensor 43; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 44 PAR 44 Individual PAR reading for each PAR sensor 44; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 45 PAR 45 Individual PAR reading for each PAR sensor 45; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 46 PAR 46 Individual PAR reading for each PAR sensor 46; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 47 PAR 47 Individual PAR reading for each PAR sensor 47; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 48 PAR 48 Individual PAR reading for each PAR sensor 48; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 49 PAR 49 Individual PAR reading for each PAR sensor 49; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 50 PAR 50 Individual PAR reading for each PAR sensor 50; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 51 PAR 51 Individual PAR reading for each PAR sensor 51; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 52 PAR 52 Individual PAR reading for each PAR sensor 52; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 53 PAR 53 Individual PAR reading for each PAR sensor 53; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 54 PAR 54 Individual PAR reading for each PAR sensor 54; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 55 PAR 55 Individual PAR reading for each PAR sensor 55; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 56 PAR 56 Individual PAR reading for each PAR sensor 56; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 57 PAR 57 Individual PAR reading for each PAR sensor 57; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 58 PAR 58 Individual PAR reading for each PAR sensor 58; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 59 PAR 59 Individual PAR reading for each PAR sensor 59; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 60 PAR 60 Individual PAR reading for each PAR sensor 60; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 61 PAR 61 Individual PAR reading for each PAR sensor 61; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 62 PAR 62 Individual PAR reading for each PAR sensor 62; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured PAR 63 PAR 63 Individual PAR reading for each PAR sensor 63; (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured tip-PAR 64 tip-PAR 64 Individual PAR reading for each PAR sensor 64; "tip" indicates end of wand, furthest from the field technician (umol PAR per square m per sec) micromolePerMeterSquaredPerSecond real NaN Missing or Not Measured HEIGHT FROM GROUND HEIGHT FROM GROUND Where applicable, the height of the SunScan wand above the ground (cm above soil) Where applicable, the height of the SunScan wand above the ground (cm above soil) LIGHT CONDITION LIGHT CONDITION Where applicable, the light condition for the SunScan wand measurements Where applicable, the light condition for the SunScan wand measurements NOTES and ROW# NOTES and ROW# For SunScan measurements, the row number indicating repetition number (1-3) or comments about the measurement For SunScan measurements, the row number indicating repetition number (1-3) or comments about the measurement 9332 2012_GS_ITEX_BF3_DiffuseLightData.xlsx An excel file that has worksheets with the metadata and data. 2012_GS_ITEX_BF3_DiffuseLightData.xlsx Microsoft Excel http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10133&urlTail=terrest/tracegas/xlsfiles/2012_GS_ITEX_BF3_DiffuseLightData.xlsx Microsoft Excel file micro Einsteins (1E-06 moles of photons) per square meter per second (radiant flux density) micromoles of substance per micromole