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Arctic LTER Database
Arctic LTER Database
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: | 92dltuo.3 |
| Dataset Title: | Soil temperature data from the Toolik Tussock Experimental plots, Arctic LTER 1992. |
| Investigator 1: | |
| First Name: | Gus | | Last Name: | Shaver | | Organization: | Marine Biological Laboratory | | Address line 2: | The Ecosystems Center | | Address line 3: | 7 MBL Street | | City: | Woods Hole | | State: | MA | | Zip Code: | 02543 | | Country: | USA | | Investigator 2: | |
| First Name: | Jim | | Last Name: | Laundre | | Organization: | Marine Biological Laboratory | | Address line 2: | The Ecosystems Center | | Address line 3: | 7 MBL Street | | City: | Woods Hole | | State: | MA | | Zip Code: | 02543 | | Country: | USA | | Associate Investigators: | |
| Keywords: | weather, temperature, relative humidity, radiation, wind |
| Abstract: | Soil temperature data from the Toolik Tussock Experimental plots. In 1990 a Campbell CR21X datalogger was installed in block 2 of the Toolik LTER experimental tussock plots. The plots are located on a hillside near Toolik Lake (68 38' N, 149 36'W). Sensors were placed in a control, fertilized, greenhouse, greenhouse fertilized, shade house and shade house fertilized plots. All soil sensors are read every 15 minutes and averaged every 3 hours. |
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.1557&urlTail=weather/tu/data/92dltuo.csv |
| Data File Name |
92dltuo |
| Beginning Date |
5/1/1992 |
| End Date |
9/1/1992 |
| Number of Data Records |
1256 |
| Other Files to Reference |
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| Availability Status |
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| Quality Control Information |
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| Maintenance Description |
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| Log of Changes: |
Log of changes:
17Nov92 Collated data from .dat files and added form notes. JL 29Dec92 Deleted data when battery dropped below 9 volts on 92244. JL
Apr96 Finished entering data and documenting JL
19Oct00 Added year and y2k date. Standardized the variables across years. JimL
For Archival Use:
DATE RECEIVED: 8Jun92
DATA FILE ENTERED BY: J.Laundre
DATA FILE VALIDATION: 18Oct92
NAME:JL
DATE: |
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Version 3: Metadata updated to newer form (with sites sheet). Units updated to current standards. 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 tussock site on hill south of Toolik Lake, North Slope of Alaska. |
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| Latitude |
68.624411 |
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-149.609589 |
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| Elevation |
750 |
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| TAXONOMIC COVERAGE: |
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| Methods: |
A Campbell CR21x datalogger, in the LTER acidic experimental plots (block 2), is used to monitor weather and soil temperatures.
Sensors in the control plot include: global solar radiation, photosynthetically 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 photosynthetically 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 yyDLTUH.DAT, yyDLTUO.DAT, and yDLTUD.DAT respectively, where yy is the year in which the data are collected. The original data are in file yyDLTDAT.ZIP which is archived at The Marine Biological Lab, Woods Hole, MA.
Note: The covers on greenhouses and shade houses are removed every fall and reinstalled every spring.
Notes: The data logger failed in winter 91-92. Battery voltage dropped below 9 volts. Last day collected was 1991 Julian 313. A new 21x was installed and the old one sent to be serviced. An error was made when setting up the new program - minute readings was averaged every minute. As a result data overflowed the memory and only one day worth of data was saved. The problem was corrected 1992 Julian 193. Lost data when battery dropped below 9 volts on Julian 244.
Soil temperatures are problematic since frost heaving of the probes caused depth of measurements to change. Missing values are indicated by #N/A. Only unfrozen precipitation is reported. Wind speeds less then 0.447 are considered calm. For the global solar radiation sensors no attempt is made to correct for frost or snow on the sensors during the winter months. Therefore winter radiation data should be view as suspect and used only qualitatively. The control and shade RH sensor are faulty, never getting above 82%. Data are report but not used in vapor pressure calculation.
Reference Citations: Buck, A.L. 1981 New equations for computing vapor pressure and enhancement factor. Journal of Applied Meteorology 20:1527-1532.
Sampling Description.
DAYS: JULIAN + (HOUR/2400)
Control plot soil thermocouples CT1 are in a E.vag tussock a tindicated depth. CT2 are in a moss inter-tussock area at indicated depth Greenhouse soil thermocouples GH1 are in a E.vag tussock at indicated depth. GH2 are in a moss inter-tussock area at indicated depth Shadehouse soil thermocouples SH1 are in a E.vag tussock at indicated depth. SH2 are in a moss inter-tussock area at indicated depth Fertilized plot soil thermocouples F1 are in a E.vag tussock at indicated depth. F2 are in a moss inter-tussock area at indicated depth Greenhouse fertilized soil thermocouples Celsius GF1 are in a E.vag tussock at indicated depth. GF2 are in a moss inter-tussock area at indicated depth Shadehouse fertilized soil thermocouples Celsius SF1 are in a E.vag tussock at indicated depth. SF2 are in a moss inter-tussock area at indicated depth |
Data Table
| Variable Name |
Variable Description |
Data Type |
Units |
DateTime Format |
Code Information |
Missing Value Code |
| YEAR |
Year |
datetime |
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YYYY |
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| DATE |
Date |
datetime |
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DD-MMM-YYYY |
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| Month |
Month of record |
datetime |
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mm |
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| DAYS |
Julian day + fraction of a day |
datetime |
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ddd |
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| ID |
Program step that output the data |
text |
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| JULIAN |
Julian Date |
datetime |
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ddd |
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| HOUR |
Time- Alaskan standard time |
datetime |
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hhmm |
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| CT1 10CM |
Set 1 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| CT1 20CM |
Set 1 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| CT1 40CM |
Set 1 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| CT2 10CM |
Set 2 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| CT2 20CM |
Set 2 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| CT2 40CM |
Set 2 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GH1 10CM |
Set 1 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GH1 20CM |
Set 1 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GH1 40CM |
Set 1 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GH2 10CM |
Set 2 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GH2 20CM |
Set 2 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GH2 40CM |
Set 2 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SH1 10CM |
Set 1 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SH1 20CM |
Set 1 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SH1 40CM |
Set 1 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SH2 10CM |
Set 2 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SH2 20CM |
Set 2 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SH2 40CM |
Set 2 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| F1 10CM |
Set 1 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| F1 20CM |
Set 1 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| F1 40CM |
Set 1 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| F2 10CM |
Set 2 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| F2 20CM |
Set 2 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| F2 40CM |
Set 2 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GF1 10CM |
Set 1 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GF1 20CM |
Set 1 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GF1 40CM |
Set 1 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| GF2 20CM |
Set 2 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SF1 10CM |
Set 1 daily average soil temperature at 10cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SF1 20CM |
Set 1 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SF1 40CM |
Set 1 daily average soil temperature at 40cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| SF2 20CM |
Set 2 daily average soil temperature at 20cm |
number |
celsius |
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#N/A=Missing or Not Measured |
| COMMENTS |
Comments about individual datum points. |
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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