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.

Abstract: 

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.

Project Keywords: 

Data set ID: 

10133

EML revision ID: 

5

Short name: 

2012_GS_ITEX_BF3_DiffuseLightData
People

Keywords: 

Arctic LTER keywords: 

Taxa: 

Dates

Date Range: 

Saturday, June 23, 2012 to Wednesday, August 8, 2012

Publication Date: 

Thursday, December 12, 2013

Methods: 

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.

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.

Sites sampled.

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

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy

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

Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
YEAR
  • Label: YEAR
  • Definition: year of measurement
  • Type: Date/time
  • Date format: YYYY
  • Missing values: None specified
Date
  • Label: Date
  • Definition: Date of Measurement
  • Type: Date/time
  • Date format: dd-mmm-yy
  • Missing values: None specified
TIMESTAMP
  • Label: TIMESTAMP
  • Definition: Date and 24-hour time of measurement
  • Type: Date/time
  • Date format: dd-mmm-yyyy hh:mm
  • Missing values: None specified
SITE
  • Label: SITE
  • Definition: Toolik (e.g. Toolik Field Station or TFS)
  • Type: Nominal
  • Missing values: None specified
GROUP
  • Label: GROUP
  • Definition: 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.
  • Type: Nominal
  • Missing values: None specified
DOM VEG
  • Label: DOM VEG
  • Definition: 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.
  • Type: Nominal
  • Missing values: None specified
TREATMENT
  • Label: TREATMENT
  • Definition: Where applicable, the treatment associated with the specific "Plot".
  • Type: Nominal
  • Missing values: None specified
MEASUREMENT
  • Label: MEASUREMENT
  • Definition: Type of measurement this data was recorded for (e.g. chamber flux, point frame, or recorded by a datalogger)
  • Type: Nominal
  • Missing values: None specified
PLOT
  • Label: PLOT
  • Definition: Where applicable, refers to Individual plot identifier
  • Type: Nominal
  • Missing values: None specified
N LAT
  • Label: N LAT
  • Definition: Latitude IVO where BF3 was logging (+/- 5m) decimal degrees N
  • Type: Physical quantity
  • Unit: degree
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
W LONG
  • Label: W LONG
  • Definition: Longitude IVO where BF3 was logging (+/- 5 m) decimal degress W
  • Type: Physical quantity
  • Unit: degree
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
ELEVATION
  • Label: ELEVATION
  • Definition: GoogleEarth elevation estimate (m above sea level)
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
TIME
  • Label: TIME
  • Definition: 24-hour time of measurement
  • Type: Date/time
  • Date format: HH:MM:SS
  • Missing values:
    • NaN = Missing or Not Measured
ID_1
  • Label: ID_1
  • Definition: SunScan file record number 1 associated with measurement
  • Type: Nominal
  • Missing values: None specified
ID_2
  • Label: ID_2
  • Definition: SunScan file record number 2 or datalogger record nuimber associated with measurement
  • Type: Nominal
  • Missing values: None specified
SunScan WAND AVG
  • Label: SunScan WAND AVG
  • Definition: Where applicable, average of 64-PAR sensors on the SunScan wand
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
WAND SPREAD
  • Label: WAND SPREAD
  • Definition: Where applicable, standard deviation of the 64-PAR sensors on the SunScan wand (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
BF3 TOT IRRAD
  • Label: BF3 TOT IRRAD
  • Definition: Total irradiance (direct and diffuse) measured by the BF3 sensor (umol total PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
BF3 DIFFUSE
  • Label: BF3 DIFFUSE
  • Definition: Total diffuse light measured by the BF3 sensor (umol diffuse PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
DIFFUSE LIGHT FRACTION
  • Label: DIFFUSE LIGHT FRACTION
  • Definition: Fraction (%) of diffuse light = (Diffuse Light) / (Total Irradiance); measured by BF3 sensor
  • Type: Physical quantity
  • Unit: micromolePerMicromole
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 1
  • Label: PAR 1
  • Definition: Individual PAR reading for each PAR sensor 1; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 2
  • Label: PAR 2
  • Definition: Individual PAR reading for each PAR sensor 2; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 3
  • Label: PAR 3
  • Definition: Individual PAR reading for each PAR sensor 3; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 4
  • Label: PAR 4
  • Definition: Individual PAR reading for each PAR sensor 4; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 5
  • Label: PAR 5
  • Definition: Individual PAR reading for each PAR sensor 5; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 6
  • Label: PAR 6
  • Definition: Individual PAR reading for each PAR sensor 6; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 7
  • Label: PAR 7
  • Definition: Individual PAR reading for each PAR sensor 7; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 8
  • Label: PAR 8
  • Definition: Individual PAR reading for each PAR sensor 8; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 9
  • Label: PAR 9
  • Definition: Individual PAR reading for each PAR sensor 9; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 10
  • Label: PAR 10
  • Definition: Individual PAR reading for each PAR sensor 10; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 11
  • Label: PAR 11
  • Definition: Individual PAR reading for each PAR sensor 11; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 12
  • Label: PAR 12
  • Definition: Individual PAR reading for each PAR sensor 12; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 13
  • Label: PAR 13
  • Definition: Individual PAR reading for each PAR sensor 13; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 14
  • Label: PAR 14
  • Definition: Individual PAR reading for each PAR sensor 14; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 15
  • Label: PAR 15
  • Definition: Individual PAR reading for each PAR sensor 15; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 16
  • Label: PAR 16
  • Definition: Individual PAR reading for each PAR sensor 16; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 17
  • Label: PAR 17
  • Definition: Individual PAR reading for each PAR sensor 17; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 18
  • Label: PAR 18
  • Definition: Individual PAR reading for each PAR sensor 18; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 19
  • Label: PAR 19
  • Definition: Individual PAR reading for each PAR sensor 19; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 20
  • Label: PAR 20
  • Definition: Individual PAR reading for each PAR sensor 20; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 21
  • Label: PAR 21
  • Definition: Individual PAR reading for each PAR sensor 21; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 22
  • Label: PAR 22
  • Definition: Individual PAR reading for each PAR sensor 22; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 23
  • Label: PAR 23
  • Definition: Individual PAR reading for each PAR sensor 23; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 24
  • Label: PAR 24
  • Definition: Individual PAR reading for each PAR sensor 24; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 25
  • Label: PAR 25
  • Definition: Individual PAR reading for each PAR sensor 25; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 26
  • Label: PAR 26
  • Definition: Individual PAR reading for each PAR sensor 26; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 27
  • Label: PAR 27
  • Definition: Individual PAR reading for each PAR sensor 27; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 28
  • Label: PAR 28
  • Definition: Individual PAR reading for each PAR sensor 28; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 29
  • Label: PAR 29
  • Definition: Individual PAR reading for each PAR sensor 29; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 30
  • Label: PAR 30
  • Definition: Individual PAR reading for each PAR sensor 30; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 31
  • Label: PAR 31
  • Definition: Individual PAR reading for each PAR sensor 31; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 32
  • Label: PAR 32
  • Definition: Individual PAR reading for each PAR sensor 32; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 33
  • Label: PAR 33
  • Definition: Individual PAR reading for each PAR sensor 33; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 34
  • Label: PAR 34
  • Definition: Individual PAR reading for each PAR sensor 34; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 35
  • Label: PAR 35
  • Definition: Individual PAR reading for each PAR sensor 35; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 36
  • Label: PAR 36
  • Definition: Individual PAR reading for each PAR sensor 36; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 37
  • Label: PAR 37
  • Definition: Individual PAR reading for each PAR sensor 37; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 38
  • Label: PAR 38
  • Definition: Individual PAR reading for each PAR sensor 38; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 39
  • Label: PAR 39
  • Definition: Individual PAR reading for each PAR sensor 39; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 40
  • Label: PAR 40
  • Definition: Individual PAR reading for each PAR sensor 40; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 41
  • Label: PAR 41
  • Definition: Individual PAR reading for each PAR sensor 41; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 42
  • Label: PAR 42
  • Definition: Individual PAR reading for each PAR sensor 42; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 43
  • Label: PAR 43
  • Definition: Individual PAR reading for each PAR sensor 43; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 44
  • Label: PAR 44
  • Definition: Individual PAR reading for each PAR sensor 44; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 45
  • Label: PAR 45
  • Definition: Individual PAR reading for each PAR sensor 45; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 46
  • Label: PAR 46
  • Definition: Individual PAR reading for each PAR sensor 46; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 47
  • Label: PAR 47
  • Definition: Individual PAR reading for each PAR sensor 47; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 48
  • Label: PAR 48
  • Definition: Individual PAR reading for each PAR sensor 48; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 49
  • Label: PAR 49
  • Definition: Individual PAR reading for each PAR sensor 49; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 50
  • Label: PAR 50
  • Definition: Individual PAR reading for each PAR sensor 50; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 51
  • Label: PAR 51
  • Definition: Individual PAR reading for each PAR sensor 51; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 52
  • Label: PAR 52
  • Definition: Individual PAR reading for each PAR sensor 52; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 53
  • Label: PAR 53
  • Definition: Individual PAR reading for each PAR sensor 53; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 54
  • Label: PAR 54
  • Definition: Individual PAR reading for each PAR sensor 54; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 55
  • Label: PAR 55
  • Definition: Individual PAR reading for each PAR sensor 55; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 56
  • Label: PAR 56
  • Definition: Individual PAR reading for each PAR sensor 56; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 57
  • Label: PAR 57
  • Definition: Individual PAR reading for each PAR sensor 57; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 58
  • Label: PAR 58
  • Definition: Individual PAR reading for each PAR sensor 58; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 59
  • Label: PAR 59
  • Definition: Individual PAR reading for each PAR sensor 59; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 60
  • Label: PAR 60
  • Definition: Individual PAR reading for each PAR sensor 60; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 61
  • Label: PAR 61
  • Definition: Individual PAR reading for each PAR sensor 61; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 62
  • Label: PAR 62
  • Definition: Individual PAR reading for each PAR sensor 62; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
PAR 63
  • Label: PAR 63
  • Definition: Individual PAR reading for each PAR sensor 63; (umol PAR per square m per sec)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
tip-PAR 64
  • Label: tip-PAR 64
  • Definition: 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)
  • Type: Physical quantity
  • Unit: micromolePerMeterSquaredPerSecond
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NaN = Missing or Not Measured
HEIGHT FROM GROUND
  • Label: HEIGHT FROM GROUND
  • Definition: Where applicable, the height of the SunScan wand above the ground (cm above soil)
  • Type: Nominal
  • Missing values: None specified
LIGHT CONDITION
  • Label: LIGHT CONDITION
  • Definition: Where applicable, the light condition for the SunScan wand measurements
  • Type: Nominal
  • Missing values: None specified
NOTES and ROW#
  • Label: NOTES and ROW#
  • Definition: For SunScan measurements, the row number indicating repetition number (1-3) or comments about the measurement
  • Type: Nominal
  • Missing values: None specified