uid=ARC,o=lter,dc=ecoinformatics,dc=org all public read 2003-2009gssoiltemp.06 Arctic LTER Program Gus Shaver

The Ecosystems Center Marine Biological Laboratory 7 MBL St. Woods Hole MA 2543 USA

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/ Mark van Wijk Associated Researcher Lorna Street Associated Researcher Brooke Kaye Associated Researcher Jim Laundre Associated Researcher Mathew Williams Associated Researcher Cath Thompson Associated Researcher Carrie McCalley Associated Researcher Beth Bernhardt Associated Researcher Bob Douma Associated Researcher Celine Ronfort Associated Researcher Kerry Dinsmore Associated Researcher Robert Bell Associated Researcher Peter van Buuren Associated Researcher Craig Menzies Associated Researcher Scott Graham Associated Researcher Jen Peters Associated Researcher 2010 Soil temperature, moisture content and thaw depth of the ITEX flux survey plots. Survey plots were located in the Toolik Lake LTER fertilization experiment in Alaska; at Imnavait Creek, Alaska; at Paddus, Latnjajaure and the Stepps site near Abisko in northern Sweden; at various sites in Adventdalen, Svalbard; in the Zackenberg valley, Northeast Greenland; at BEO near Barrow, Alaska and at the Anaktuvuk River Burn in Alaska. Measurements were made during the growing seasons 2003 to 2009. ITEX flux survey soil temperature depth of thaw soil volumetric water content 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/2003-2009gssoiltemp.html Toolik Lake (68 degrees 38N, 149 degrees 34W) -149.61058 -149.61058 68.62405 68.62405 Imnavait Creek (68 degrees 37N, 149 degrees 18W) Alaska, U.S. -149.31 -149.31 68.6167 68.6167 "Stepps" site (68 degrees 18N, 18 degrees 51E) near Abisko, Sweden. 18.85 18.85 68.3 68.3 Paddus (68 degrees 19N, 18 degrees 51E) near Abisko, Sweden. 18.85 18.85 68.3167 68.3167 Latnjajaure (68 degrees 21N, 18 degrees 30E) near Abisko, Sweden. 18.5 18.5 68.35 68.35 Adventdalen (78 degrees 13N, 15 degrees 38E) Svalbard, Norway. 15.6333333333333 15.6333333333333 78.2166666666667 78.2166666666667 Zackenberg research area zone 1a (74º28’ N, 20º34’ W), Northeast Greenland. -19.4333333333333 -19.4333333333333 74.4666666666667 74.4666666666667 Barrow ( 71° 18' N, 156° 36' W) Alaska, USA. -156.6 -156.6 71.31 71.31 Anaktuvuk River Burn (68° 56-59' N, 150° 12-16' W) Alaska, USA. -150.2 -150.2 68.9 68.9 2003-07-06 2009-08-17 Added 2006 data and updated metadat.txt with new site descriptions, references, files to reference etc. Also added a new identifier column called "plot size" because 2006 data include measurements made on 0.3m x 0.3m plots. Changed date in file name from 2005 to 2006. Oct 2006 LStreet Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files. Version 4: Updated LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url. Version 5: Added 2009 data. Changed name from 2006 to 2009. Added sixth replicate columns for all measurement types. Version 6: Updated metadata form to newer version (without site sheet). Missing values changed to #N/A. CH 25Jan2013. Updated to newer metadata with site sheet. CH March 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/ RESEARCH LOCATIONS: Imnavait Creek, Alaska 2003: Measurements were made on 8 1m x 1m flux plots in different vegetation types along the topographic sequence of the west facing slope of Imnavait Creek catchment. Imnavait Creek, Alaska 2004: Measurements were made on 15 1m x 1m plots along the topographic sequence of the west facing slope of Imnavait Creek catchment, in the same area as 2003. Toolik Lake, Alaska 2004: Measurements were made on a total of 20 flux plots in treatment (N +P) and control blocks of the LTER fertilization experiment at Toolik Lake, including the moist acidic tussock, non-acidic tussock, non acidic non-tussock, inlet wet sedge and heath sites. Abisko, Sweden 2004: 11 plots were located at the Stepps site, 13 plots at Paddus and 12 plots at Latnjajaure in a range of vegetation types. Abisko, Sweden 2005: Measurements were made on 15 plots at the Stepps site. Svalbard 2005: Measurements were made on 41 plots at various sites in Adventdalen. Zackenberg 2006: Measurements were made on 35 1m x 1m plots and 25 0.3m x 0.3m plots at various sites within 2km of the ZERO research station - in research zone 1a. Toolik 2009: Data were collected on nine 1m x 1m plots, three in each vegetation type. Vegetation types included moist acidic tundra (MAT), dry heath (HTH) and wet sedge (WSG). Each plot was measured at approximately 2 weeks intervals from mid-June to mid-August 2009. Anaktuvuk River Burn 2009: Data was collected on five 0.7m x 0.7m plots along a burn severity gradient during mid-June 2009. Barrow 2009: Data was collected on thirteen 0.7m 0.7m plots along a moisture gradient during late-July to early-August 2009. EXPERIMENTAL DESIGN AND METHODS: We measured soil characteristics every time CO2 flux measurements were made on a plot. Sorting variables correspond to those in other ITEX flux survey files. The following data are available at the following sites: Toolik 2003 - thaw depth Toolik 2004 - thaw depth, VWC, soil temperature at 5cm Abisko 2004 - VWC, soil temperature at 5cm and 10cm Abisko 2005 - VWC, soil temperature at 5cm and 10cm Svalbard 2005 - VWC, soil temperature at 5cm and 10cm Zackenberg 2006 - VWC, soil temperature at 5cm and 10cm Toolik 2009- Surface temp, VWC, soil temperature at 5cm and 10cm, depth of thaw for some plots only Barrow 2009- Surface temp, VWC, soil temperature at 5cm and 10cm, depth of thaw for some plots only AR Burn 2009- Surface temp, VWC, soil temperature at 5cm and 10cm We measured soil temperature at 5cm and 10cm below the soil surface 5 times per plot (3 times for 0.3m x 0.3m plots), using traceable soil temperature probes (Fischer Scientific). Where possible we also took 5 soil VWC (%) measurements (1-3 for 0.3m x 0.3m plots) and 5 thaw depth measurements. VWC was measured using a Hydrosense Water Content Sensor (TDR probe) with 20cm tines (Campbell Scientific). The TDR probe was inserted into the soil to the full depth of 20cm whenever possible. If not the tines were inserted at an angle; the approximate depth reached is indicated in the notes column. We measured thaw depth using a graduated steel rod pushed down through the soil to the top of the permafrost. At times it was evident from the abruptness of change in penetrability that it was rock and not permafrost underlying the thawed soil, this is indicated in the notes column. If the soil was too rocky to penetrate to take temperature measurements this is also indicated in the notes column. Calculations: The TDR probe is calibrated at manufacture for use in agricultural soils; for tundra soils meter readings were corrected using the equation: actual VWC (%) = 0.5952*(meter reading) + 7.684 R2 = 0.8649 (J Powers, unpublished data, 2003) COMMENTS: FOR MORE INFORMATION CONTACT: Gus Shaver, The Ecosystems Center, Woods Hole, MA, 02543, USA REFERENCE CITATIONS: Street, L.E., Shaver, G.R., Williams, M., van Wijk, M.T. (in press) What is the relationship between changes in canopy leaf area and changes in photosynthetic CO2 flux in arctic ecosystems? Journal of Ecology Williams, M., Street, L.E., van Wijk, M.T., and Shaver, G.R. (2006) Identifying Differences in Carbon Exchange among Arctic Ecosystem Types. Ecosystems, 9, 288-304. FORMAT OF DATA FILE: ASCII pers-1 See Methods 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 2003-2009gssoiltemp.csv Soil temperature, volumetric water content and depth of thaw for ITEX CO2 flux survey plots 2003-2009. 2003-2009gssoiltemp.csv 1 \r\n column , " http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1604&urlTail=terrest/tracegas/data/2003-2009gssoiltemp.csv YEAR YEAR Year measurement taken yyyy DATE DATE Date measurement taken dd-mon-yy SITE SITE Abisko, Toolik, Svalbard or Zackenberg Abisko, Toolik, Svalbard or Zackenberg GROUP GROUP Location of flux plots at each site Location of flux plots at each site PLOT PLOT Individual plot identifier Individual plot identifier TREATMENT TREATMENT Control or fertilized with N and P fertilizer Control or fertilized with N and P fertilizer PHASE PHASE Measurement series (round of measurement within each year) Measurement series (round of measurement within each year) PLOT SIZE PLOT SIZE Plot size of 1m x 1m, 0.3m x 0.3m or 0.7m x 0.7m Plot size of 1m x 1m, 0.3m x 0.3m or 0.7m x 0.7m td_1 td_1 thaw depth replicate 1 centimeter real #N/A Missing or Not Measured td_2 td_2 thaw depth replicate 2 centimeter real #N/A Missing or Not Measured td_3 td_3 thaw depth replicate 3 centimeter real #N/A Missing or Not Measured td_4 td_4 thaw depth replicate 4 centimeter real #N/A Missing or Not Measured td_5 td_5 thaw depth replicate 5 centimeter real #N/A Missing or Not Measured td_6 td_6 thaw depth replicate 6 centimeter real #N/A Missing or Not Measured td_mean td_mean thaw depth mean centimeter real #N/A Missing or Not Measured temp5_1 temp5_1 soil temp at 5cm replicate 1 celsius real #N/A Missing or Not Measured temp5_2 temp5_2 soil temp at 5cm replicate 2 celsius real #N/A Missing or Not Measured temp5_3 temp5_3 soil temp at 5cm replicate 3 celsius real #N/A Missing or Not Measured temp5_4 temp5_4 soil temp at 5cm replicate 4 celsius real #N/A Missing or Not Measured temp5_5 temp5_5 soil temp at 5cm replicate 5 celsius real #N/A Missing or Not Measured temp5_6 temp5_6 soil temp at 5cm replicate 6 celsius real #N/A Missing or Not Measured temp_mean temp_mean soil temp at 5cm mean celsius real #N/A Missing or Not Measured temp10_1 temp10_1 soil temp at 10cm replicate 1 celsius real #N/A Missing or Not Measured temp10_2 temp10_2 soil temp at 10cm replicate 2 celsius real #N/A Missing or Not Measured temp10_3 temp10_3 soil temp at 10cm replicate 3 celsius real #N/A Missing or Not Measured temp10_4 temp10_4 soil temp at 10cm replicate 4 celsius real #N/A Missing or Not Measured temp10_5 temp10_5 soil temp at 10cm replicate 5 celsius real #N/A Missing or Not Measured temp10_6 temp10_6 soil temp at 10cm replicate 6 celsius real #N/A Missing or Not Measured temp10_mean temp10_mean soil temp at 10cm mean celsius real #N/A Missing or Not Measured VWC_1 VWC_1 volumetric soil water content replicate 1 percent real #N/A Missing or Not Measured VWC_2 VWC_2 volumetric soil water content replicate 2 percent real #N/A Missing or Not Measured VWC_3 VWC_3 volumetric soil water content replicate 3 percent real #N/A Missing or Not Measured VWC_4 VWC_4 volumetric soil water content replicate 4 percent real #N/A Missing or Not Measured VWC_5 VWC_5 volumetric soil water content replicate 5 percent real #N/A Missing or Not Measured VWC_6 VWC_6 volumetric soil water content replicate 6 percent real #N/A Missing or Not Measured VWC_mean VWC_mean volumetric water content mean percent real #N/A Missing or Not Measured COMMENTS COMMENTS comments comments #N/A Missing or Not Measured 446 2003-2009gssoiltemp.xls An excel file that has worksheets with the metadata and data. 2003-2009gssoiltemp.xls Microsoft Excel http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.1604&urlTail=terrest/tracegas/xlsfiles/2003-2009gssoiltemp.xls Microsoft Excel file ratio of two quantities as percent composition (1:100)