IPYsnowshrub2007 Jeff Welker

Ecosystem/Biomedical Lab University of Alaska Anchorage AK 99508 USA

Paddy Sullivan

Ecosystem/Biomedical Lab University of Alaska Anchorage AK 99508 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/ 2011 This is a study of how soil temperatures at 10 cm and soil moisture change across the summer at our IPY snow fence site IPY fences 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=./Welker/IPY_Snow_shrub/NF_soil_temp_and_soil_water_08.html three locations on the eastern side of the Toolik River where by snow fences were established as part of IPY -149.5712167 -149.5712167 68.381182 68.381182 2008-06-07 2008-08-31 Version 1 : Mar 2011 Received file from Jeff Welker. Updated the metadata sheet and created eml files and web files. JimL 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/ This is soil temperature from three locations on the eastern side of the Toolik River where by snow fences were established as part of IPY. Measurements were taken at 3 locations (3 replicates) with four treatments, control, drift, drift and shoveled and drift, shoveled and watered ( C, D, DS, DSW). The three replicates were called: upper, south, north (U, S, N). At approximatly biweek periods we have measured soil temperature (oC) at 10 cm using a hand held thermometer probe inserted into the soil and we used a Water sense probe (dielectic method) to measure soil water content by volume. These measurments were taken in conjunction with our periodic CO2 flux measurements. pers-1 Jeff Welker

Ecosystem/Biomedical Lab University of Alaska Anchorage AK 99508 USA

afjmw1@uaa.alaska.edu Lead PI Mechanisms and feedback consequences of shrub expansion following long-term increases in winter snow depth in northern Alaska: a legacy for IPY NSF-OPP 0612534 The primary aims of this project have been to understand the mechanisms and feedback consequences of shrub increases in northern Alaska using experimental, observational and expedition research. We have undertaken studies at Toolik Lake, Alaska and across the north slope along the Colville and Noatak rivers and in the Chandalar River drainage. Our studies have implement new snow manipulation experiments and we have utilized a snow experiment that was initiated by NSF OPP in 1994. We implemented the first wind turbine powered research at Toolik Lake that powered our CO2 sensors over winter allowing for winter-long quantification of C losses in areas where shrubs have been increasing and in ambient areas. We conducted vegetation surveys along the major river drainages and have characterized areas with expanding and stagnate shrub growth which appear to be related to disturbance history, subsequent soil properties, plant water and nutrient relations and growth. We have also used 14C measurements to depict the loss of ancient C to the atmosphere as snow accumulates when shrubs become an increasing large component of the landscape. This material is based upon work supported by the National Science Foundation under Grants #NSF-OPP 0612534. 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. uid=ARC,o=lter,dc=ecoinformatics,dc=org all public read NF_soil_temp_and_soil_water_08.csv Welker IPY snow shrub 2008 soil temperatuers and soil water content Toolik, Alaska. NF_soil_temp_and_soil_water_08.csv 1 column , http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10112&urlTail=Welker/IPY_Snow_shrub/data/NF_soil_temp_and_soil_water_08.csv Block Block Block-these are the locations of the set of treatments-one block consist of all four snow treatments: upper, south, north Block-these are the locations of the set of treatments-one block consist of all four snow treatments: upper, south, north Treatment Treatment Treatment-these are the four different snow mannipulaiton treatments, control where now fence was put up, a drift treatment which is behind the snow fence (1 m x 15 m), the drift plus shoveling which involved snow removal before melt and drift, plus shoveling plus added water after melt. Treatment-these are the four different snow mannipulaiton treatments, control where now fence was put up, a drift treatment which is behind the snow fence (1 m x 15 m), the drift plus shoveling which involved snow removal before melt and drift, plus shoveling plus added water after melt. Date Date Date is the calender day of flux measurements dd/mm/yyyy Plot Plot Plot is the subsamples within a treatment Plot is the subsamples within a treatment Type Type Type is measurments in between tussocks or on tussocks Type is measurments in between tussocks or on tussocks Soil temperature Soil temperature soil temps celsius real soil water content soil water content soil water percent real NF_soil_temp_and_soil_water_08.xls An excel file that has worksheets with the metadata and data. NF_soil_temp_and_soil_water_08.xls Microsoft Excel http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10112&urlTail=Welker/IPY_Snow_shrub/xlsfiles/NF_soil_temp_and_soil_water_08.xls Microsoft Excel file ratio of two quantities as percent composition (1:100)