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Conditions of Use
The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:
1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:
Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml
4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:
Data sets were provided by the Arctic LTER. 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.
5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.
By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.
Disclaimer
While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.
| Dataset URLs: | METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data |
| Dataset ID: | 2007dlMATO.03 |
| Dataset Title: | Soil and canopy temperature data from the Arctic LTER Moist Acidic Tussock Experimental plots for 2007, Toolik Filed Station, North Slope, Alaska. |
| Investigator 1: | |
| First Name: | Gus | | Last Name: | Shaver | | Organization: | Marine Biological Lab | | Address line 2: | The Ecosystems Center | | Address line 3: | 7 MBL St | | City: | Woods Hole | | State: | MA | | Zip Code: | 02543 | | Country: | USA | | Investigator 2: | |
| First Name: | Jim | | Last Name: | Laundre | | Organization: | Marine Biological Lab | | Address line 2: | The Ecosystems Center | | Address line 3: | 7 MBL St | | City: | Woods Hole | | State: | MA | | Zip Code: | 02543 | | Country: | USA | | Associate Investigators: | |
| Keywords: | weather, soil temperature, canopy temperature |
| Abstract: | Soil and canopy temperature data from the LTER Moist Acidic Tussock Experimental plots. In 1989 a treatment plots were established in a moist acidic tundra. Treatments include nitrogen and phosphorus addition, warming with a simple greenhouse, warming with nitrogen and phosphorus addition, shading with shade cloth and shading with nitrogen and phosphorus. In 1990 data logger was installed in block 2 to measure soil temperatures and basic meteorological data. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized sites. |
For questions about the Metadata and data contact the Investigators.
For information about this web site contact: |
Arctic LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7496
Email: arc_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/ARC/ |
| DATA FILE INFORMATION: |
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| Data File URL |
http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10018&urlTail=weather/tu/data/2007dlmato.csv |
| Data File Name |
2007dlmato.dat |
| Beginning Date |
1/1/2007 |
| End Date |
12/31/2007 |
| Number of Data Records |
2920 |
| Other Files to Reference |
http://ecosystems.mbl.edu/arc/meta_template.asp?FileName=./weather/tu/2007dlmath.html
http://ecosystems.mbl.edu/arc/meta_template.asp?FileName=./weather/tu/2007dlmatd.html |
| Availability Status |
1 |
| Quality Control Information |
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| Maintenance Description |
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| Log of Changes: |
Version 1: DATA FILE ENTERED BY: J. Laundre; Deleted soil data where the soil probes have frost heaved and are 3 cm or more higher then set depth. |
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Version 2: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url. |
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Version 3: Metadata updated to newer form (with sites sheet). Discrepancy with variable names fixed. CH April 2013. |
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| RESEARCH LOCATION: |
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| Location Name |
LTER Moist Acidic Tussock Tundra |
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| Geographic Description |
Toolik Lake Field Station (68 38' N, 149 36'W), LTER moist acidic tussock site on hill south of Toolik Lake, North Slope of Alaska. |
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68.624 |
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-149.607 |
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| Elevation |
745 |
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| TAXONOMIC COVERAGE: |
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| Methods: | A data logger, in the LTER moist acidic experimental plots (in block 2), is used to monitor weather and soil temperatures.
Sensors in the control plot include: global solar radiation, photosynthetic active radiation, unfrozen precipitation, air temperature, relative humidity, wind speed, and wind direction at 3 meters. Additional seasons in greenhouses and shade houses plots measure air temperature, relative humidity and photosynthetic active radiation during the growing season. These sensors are read every minute and averaged or totaled every hour.
Two profiles of soil temperature are measured per treatment plot with copper/constantin thermocouple wires (TC) installed at depths of 10, 20, and 40 cm in inter-tussock areas. The following label codes are used: CT = control, GH = greenhouses, SH = shade houses, F = fertilized, GF= greenhouse fertilized, SF = shade house fertilized, plus a 1 or a 2 for the profile number. All soil sensors are read every 15 minutes and averaged every 3 hours.
Hourly, three hourly and daily summaries are in files yyyyDLMATH.DAT, yyyyDLMATO.DAT, and yyyyDLMATD.DAT respectively, where yy is the year in which the data are collected. The original data are in file yyDLMATDAT.ZIP which is archived at The Marine Biological Lab, Woods Hole, MA.
NOTES:
The covers on greenhouses and shade houses are removed every fall and reinstalled every spring. Seee comment variable for dates.
Soil temperatures are problematic since frost heaving of the probes caused depth of measurements to change. Probes were measured on 15Aug2007 and then reset to the correct depth if possible, see below. Data that were 3 cm or more off the expected depths were deleted. See Frost heaving was assummed to occurred in early June.
On Aug 15 error in depth was measured and we are assuming any error due to frost heave occurred in June.
15-Aug-07 GH GH1 20 5 0
15-Aug-07 GH GH1 40 5 0
15-Aug-07 NP NP2 10 -3 -3 0 is below grade by 3 cm
15-Aug-07 NP NP2 20 -3 -3 0 is below grade by 3 cm
15-Aug-07 NP NP2 40 -3 -3 0 is below grade by 3 cm
15-Aug-07 SH SHNP1 20 5 5 In the graph of the data SHNP2 is higher temperature then SHNP1?? Maybe this is SHNP2.
15-Aug-07 SH SHNP1 40 16 16 In the graph of the data SHNP1 40 does not look like it is 16 cm up. Maybe this is SHNP2.
15-Aug-07 SH SHNP2 10 1 1 not recorded by logger
15-Aug-07 SH SHNP2 20 1 1
15-Aug-07 SH SHNP2 40 1 1 not measured by logger
Missing values are indicated by #N/A. Where values were deleted due to errors in depth due to frost heaving a blank is entered.
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Sensor Description
Following are brief descriptions of the sensors used at the weather monitoring station. Included with each description is a list of stations using the sensor and the number of sensors at that site. Company addresses follow the list.
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PYRANOMETER:
Li-Cor, Pyranometer: Model LI-200SA- Sensor measures global solar radiation (sun plus sky). Specs: Sensitivity - 80mA per 1000 Watts m-2. Absolute error max ±5% but typically ±3
QUANTUM:
Li-Cor, Quantum. Model LI-190SB. Quantum measure photosynthetically active radiation (PAR) in ?mol s-1 m-2. Specs: range 400-700nm wavelength. Sensitivity 8mA/1000 ?mol s-1 m-2. Relative error less then ±10% for plant canopies or less then ±5% for growth chambers. Toolik.
RELATIVE HUMIDITY/TEMPERATURE:
Campbell Scientific, CS500 Temperature and Relative Humidity Probe. Uses PRT for temperature measurement; capacitive RH chip for RH. Accuracy is ±3% over 10-90% RH; ±6% over 90-100% RH. Manufactured by Vaisala, Inc.
WIND DIRECTION:
MET-ONE, (supplied by Campbell Scientific) Wind direction use a light weight, air foil vane and a potentiometer to produce an output that varies proportional with wind direction. Specs: Minimum Wind speed to get accurate reading = 1.0 mph. Accuracy ±5° Temperature range -50 to 70°C.
WIND SPEED:
MET-ONE, (supplied by Campbell Scientific) Wind speed sensor Model 014A. Sensor uses a 3-cup anemometer assembly and simple magnet-read switch assembly to produce a series of contact closures whose frequency is proportional to wind speed. Specs: Operating Range - 0 to 125 mph or 0-60 m/s. Accuracy ±1.5% or 0.25 mph. Working temperature range - -50 to 85°C
RAIN GAUGE:
Texas Electronics, Inc. (supplied by Campbell Scientific) Tipping Bucket Electric Rain Gauge. A complex spun collector funnel with a knife edge that diverts the water to a tipping bucket mechanism. For each tip a magnet causes an electronic pulse that is recorded. Each alternate tip occurs for each 0.01 inch of rainfall. Specs: Accuracy 1% at 2 inches/hr or less. Accurate Temperature Range: 0 - 37°C. Alter wind shield installed around gauge.
THERMOCOUPLES:
Omega Engineering, Copper-Constantan wire. Range -200 to 350 °C. Limits of error: Standard wire 1.0°C or 0.75% above 0°C and 1.0°C or 1.5% below 0°C. Special wire 0.5°C or 0.4%.
List of manufactories and suppliers.
Campbell Scientific, Inc.
81 W. 1800 N.
Logan, Utah 84321-1784
(435)750-1739
Druck Inc.
4 Dunham Drive
New Fairfield, CT 06812
(203)746-0400
Li-Cor
4421 Superior St
P.O. Box 4425
Lincoln, Nebraska 68504
(800)447-3576
Omega Engineering, Inc.
P.O. Box 4047
Stamford, CT 06907-0047
(800)826-6342
Reference Citations: Buck, A.L. 1981 New equations for computing vapor pressure and enhancement factor. Journal of Applied Meteorology 20:1527-1532.
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Data Table
| Variable Name |
Variable Description |
Data Type |
Units |
DateTime Format |
Code Information |
Missing Value Code |
| DATE |
Date |
datetime |
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dd-mmm-yyyy |
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| Month |
Month in integer form |
datetime |
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mm |
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| Days |
Julian day plus fraction of day |
number |
number |
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| ID |
The datalogger program output step number |
number |
number |
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| YEAR |
Year |
datetime |
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yyyy |
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| JULIAN |
Julian date |
number |
number |
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| HOUR |
Time - Alaska standard time 2400 format |
datetime |
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hhmm |
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| BATTERY |
Battery volts |
number |
volt |
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#N/A OR BLANK=Missing or Not Measured |
| CT1 10CM |
Soil Temperature in control plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| CT1 20CM |
Soil Temperature in control plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| CT1 40CM |
Soil Temperature in control plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| CT2 10CM |
Soil Temperature in control plot, set 2 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| CT2 20CM |
Soil Temperature in control plot, set 2 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| CT2 40CM |
Soil Temperature in control plot, set 2 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH1 10CM |
Soil Temperature in greenhouse plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH1 20CM |
Soil Temperature in greenhouse plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH1 40CM |
Soil Temperature in greenhouse plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH2 10CM |
Soil Temperature in greenhouse plot, set 2 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH2 20CM |
Soil Temperature in greenhouse plot, set 2 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH2 40CM |
Soil Temperature in greenhouse plot, set 2 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SH1 10CM |
Soil Temperature in shade house plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SH1 20CM |
Soil Temperature in shade house plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SH1 40CM |
Soil Temperature in shade house plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SH2 10CM |
Soil Temperature in shade house plot, set 2 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SH2 20CM |
Soil Temperature in shade house plot, set 2 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SH2 40CM |
Soil Temperature in shade house plot, set 2 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP1 10CM |
Soil Temperature in nitrogen and phosphorus fertilized plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP1 20CM |
Soil Temperature in nitrogen and phosphorus fertilized plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP1 40CM |
Soil Temperature in nitrogen and phosphorus fertilized plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP2 10CM |
Soil Temperature in nitrogen and phosphorus fertilized plot, set 2 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP2 20CM |
Soil Temperature in nitrogen and phosphorus fertilized plot, set 2 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP2 40CM |
Soil Temperature in nitrogen and phosphorus fertilized plot, set 2 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GHNP1 10CM |
Soil Temperature in nitrogen and phosphorus fertilized greenhouse plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GHNP1 20CM |
Soil Temperature in nitrogen and phosphorus fertilized greenhouse plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GHNP1 40CM |
Soil Temperature in nitrogen and phosphorus fertilized greenhouse plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GHNP2 10CM |
Soil Temperature in nitrogen and phosphorus greenhouse fertilized plot, set 2 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SHNP1 10CM |
Soil Temperature in nitrogen and phosphorus fertilized shade house plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SHNP1 20CM |
Soil Temperature in nitrogen and phosphorus fertilized shade house plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SHNP1 40CM |
Soil Temperature in nitrogen and phosphorus fertilized shade house plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| SHNP2 20CM |
Soil Temperature in nitrogen and phosphorus fertilized shade house plot, set 2 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| CT In |
Air temperature in the canopy of control plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH In |
Air temperature in the canopy of greenhouse plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GHNP In |
Air temperature in the canopy of nitrogen and phosphorus greenhouse fertilized plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP In |
Air temperature in the canopy of nitrogen and phosphorus fertilized plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX1 10 |
Soil Temperature in nitrogen and phosphorus fertilized exclosure plot, set 1 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX1 20 |
Soil Temperature in nitrogen and phosphorus fertilized exclosure plot, set 1 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX1 40 |
Soil Temperature in nitrogen and phosphorus fertilized exclosure plot, set 1 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX1 Above |
Air temperature above the canopy of nitrogen and phosphorus fertilized exclosure plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX1 In |
Air temperature in the canopy of nitrogen and phosphorus fertilized exclosure plot |
number |
celsius |
|
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#N/A OR BLANK=Missing or Not Measured |
| NPEX2 10 |
Soil Temperature in nitrogen and phosphorus fertilized exclosure plot, set 2 at 10 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX2 20 |
Soil Temperature in nitrogen and phosphorus fertilized exclosure plot, set 2 at 20 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NPEX2 40 |
Soil Temperature in nitrogen and phosphorus fertilized exclosure plot, set 2 at 40 cm |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GH Above |
Air temperature above the canopy of greenhouse plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| GHNP Above |
Air temperature above the canopy of the nitrogen and phosphorus fertilized greenhouse plot |
number |
celsius |
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#N/A OR BLANK=Missing or Not Measured |
| NP Above |
Air temperature above the canopy of the nitrogen and phosphorus fertilized plot |
number |
celsius |
|
|
#N/A OR BLANK=Missing or Not Measured |
| Comments |
comments about data |
text |
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Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site. |
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