Arctic LTER

Weather at Toolik

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:	2003_to_present_Imnavait_Thaw_Kling.05
Dataset Title:	Imnavait Watershed Thaw Depth Survey Summary for 2003 to present, Arctic LTER, Toolik Research Station, Alaska.
Investigator 1:
First Name:	George
Last Name:	Kling
Organization:	University of Michigan
Address line 2:	Department of Ecology and Evolutionary Biology
Address line 3:	830 North University
City:	Ann Arbor
State:	MI
Zip Code:	48109-1048
Country:	United States of America
Investigator 2:
First Name:	Chris
Last Name:	Wallace
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 3:
First Name:	Amanda
Last Name:	Field
Associate Investigators:
Keywords:	Imnavait Creek, tussock tundra, thaw depth, permafrost
Abstract:	Starting in 2003, thaw depth has been measured in the Imnavait Creek watershed on a weekly to biweekly basis during the summer season. A ruled stainless steel rod was inserted in non tussock microhabitat until the frozen layer was reached, and the distance was measured to the top of the organic mat (beneath the uppermost moss). Three measurements were made at each point, and were made within a 20 cm radius of each location point.
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:
Data File URL	http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1626&urlTail=landwater/soils/data/2003_present_Imnavait_Thaw_Kling.csv
Data File Name	2003_present_Imnavait_Thaw_Kling.02
Beginning Date	6/17/2003
End Date	8/11/2009
Number of Data Records	37
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Entered metadata into new metadata form.
	Version 2: LTERNET Data Access server proxy changed from das.lternet.edu to metacat.lternet.edu.
	Version 3: Added LTERNET Data Access server proxy for Excel files.
	1/26/2010 JMK- Updated to add the 2009 Data
	Version 4: Update LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url. Feb 210 JimL
	Version 5: Updated the form to new version; updated the title to .. To present. JimL 22Aug11

RESEARCH LOCATION:	Site 1	Site 2
Geographic Description	Imnavait Creek Watershed, North Slope, Alaska (approximately 68º30'N and 149º15'W, elevation at Imnavait Weir = 884 m)
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude	67.5
Longitude	-149.25
Elevation


TAXONOMIC COVERAGE:
Organisms studied

Methods:	Sampling Description: Starting in 2003, thaw depth has been measured in the Imnavait Creek watershed on a weekly to biweekly basis during the summer season. The UTM stake grid (stakes are in a grid at every 100 meters) was used to locate the points. A ruled stainless steel rod was inserted in non tussock microhabitat until the frozen layer was reached, and the distance was measured to the top of the organic mat (beneath the uppermost moss). Three measurements were made at each point, and were made within a 20 cm radius of each location point.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Date	Day, Month, and Year that sample was taken	datetime		ddmmmyyyy		.
Calendar_Day	Day of Year	number	nominalDay			.
Mean	Average Thaw Depth for the Sampling	number	centimeter			.
Standard_Devation	Standard Deviation of Thaw Depth for the Sampling	number	centimeter			.
Standard_Error	Standard Error of Thaw Depth for the Sampling	number	centimeter			.
N	Number of Measurements in the Sampling	number	centimeter			.
Minimum	Minimum Thaw Depth for the Sampling	number	centimeter			.
Maximum	Maximum Thaw Depth for the Sampling	number	centimeter			.
%CV	Coeffiecent of Variation	number	percent			.

	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.