# Scotty Creek Northwest Territories Picea mariana Tree-Ring d13C Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite original publication, online resource and date accessed when using these data, # If there is no publication information, please cite investigator, title, online resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/26110 # Description: NOAA Landing Page of study # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana557-noaa.rwl # Description: Raw Measurements - NOAA Template File # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana557.rwl # Description: Raw Measurements - Tucson Decadal File # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/northamerica/canada/scotty-creek2016d13c.txt # Description: Carbon isotope data - NOAA Template File # # Archive: Treering # # Dataset_DOI: # # Parameter_Keywords: ring width, carbon isotopes #------------------- # Contribution_Date # Date: 2019-02-13 #------------------- # File_Last_Modified_Date # Date: 2020-09-10 #------------------- # Title # Study_Name: Scotty Creek Northwest Territories Picea mariana Tree-Ring d13C Data #------------------- # Investigators: Sniderhan, A.E.; Baltzer, J.L. #------------------- # Description_Notes_and_Keywords # Description: Ring width and carbon isotope data from trees sampled near Scotty Creek, Northwest Territories. # Ring width data archived in the ITRDB, site code CANA557. # NOAA Template Raw Measurements file added 2020-01-02. d13C data file added 2020-09-10. #------------------- # Publication # Authors: Anastasia E. Sniderhan, Jennifer L. Baltzer # Journal_Name: Journal of Geophysical Research: Biogeosciences # Published_Title: Growth dynamics of black spruce (Picea mariana) in a rapidly thawing discontinuous permafrost peatland # Published_Date_or_Year: 2016 # Volume: 121 # Pages: 2988-3000 # Report_Number: # DOI: 10.1002/2016JG003528 # Full_Citation: # Abstract: High-latitude warming has led to radical changes in abiotic conditions influencing forest growth. In the North American boreal forest, widespread declines in forest productivity (particularly in western regions) and changing climate-growth relationships have been documented. Previous studies have proposed that this decline can be attributed to drought stress as increasing temperatures may cause evapotranspirative demand to exceed available moisture. We used tree ring studies to document growth dynamics of black spruce, one of the most dominant boreal tree species, in a boreal peatland experiencing rapid permafrost thaw. We specifically look at how changing permafrost conditions influence growth. Growth of black spruce at this site has declined steadily since the mid-1900s and exhibited a shift from positive responses to temperature pre-1970 to predominantly negative responses in recent decades, despite precipitation increasing over time at this site. Our results show that there is no apparent effect of landscape position or rate of lateral permafrost thaw on growth trends of black spruce, despite gradients in soil moisture and active layer thickness across the mosaic of wetlands and drier permafrost plateaus at this site. However, this does not imply no effect of permafrost thaw on growth; our results support growing evidence that vertical permafrost thaw (i.e., active layer thickening) is causing drought stress in these slow-growing, shallow-rooted trees. To our knowledge, this study is the first to investigate permafrost as a driver of within-site variability in growth-climate responses, and we provide insight into the widespread growth declines and divergence of climate-growth relationships in high-latitude forests. #------------------- # Site Information # Site_Name: Scotty Creek # Location: Northwest Territories # Northernmost_Latitude: 61.308 # Southernmost_Latitude: 61.308 # Easternmost_Longitude: -121.299 # Westernmost_Longitude: -121.299 # Elevation: 280 #------------------- # Data Collection # Collection_Name: CANA557 # Earliest_Year: 1842 # Most_Recent_Year: 2013 # Time_Unit: AD # Notes: #------------------- # Species # Species_Name: Picea mariana (Mill.) Britton, Sterns, & Poggenb. # Common_Name: black spruce # Tree_Species_Code: PCMA #------------------- # Chronology_Information # Chronology: #--------------------- # Variables # Data variables follow that are preceded by '##' in columns one and two. # Variables list, one per line; shortname-tab- components: what, material, error, units, seasonality, data_type, detail, method, C or N for Character or Numeric data,additional information) # ## age_AD age, , , year Common Era, , Tree Ring, , ,C, 5 year sample interval ## d13A007 delta 13C, wood,,per mil VPDB,,Tree Ring, , ,N, sample SCA007 whole wood ## d13E069 delta 13C, wood,,per mil VPDB,,Tree Ring, , ,N, sample SCE069 whole wood ## d13E183 delta 13C, wood,,per mil VPDB,,Tree Ring, , ,N, sample SCE183 whole wood ## d13F003 delta 13C, wood,,per mil VPDB,,Tree Ring, , ,N, sample SCF003 whole wood ## d13G020 delta 13C, wood,,per mil VPDB,,Tree Ring, , ,N, sample SCG020 whole wood ## d13TE08 delta 13C, wood,,per mil VPDB,,Tree Ring, , ,N, sample SCTE08 whole wood # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: (Value used to flag missing data in the table below) # age_AD d13A007 d13E069 d13E183 d13F003 d13G020 d13TE08 1947 - 1951 -25.72 -25.33 -25.15 -24.08 -26.61 -24.78 1952 - 1956 -24.27 -24.60 -24.83 -23.73 -26.16 -24.50 1957 - 1961 -24.30 -25.20 -24.90 -24.06 -26.39 -24.85 1962 - 1966 -24.91 -26.05 -25.20 -24.48 -26.15 -24.05 1967 - 1971 -25.32 -25.82 -24.71 -25.15 -26.51 -24.75 1972 - 1976 -25.44 -25.71 -24.23 -25.20 -26.40 -23.97 1977 - 1981 -25.71 -26.18 -24.65 -25.24 -26.62 -24.41 1982 - 1986 -26.37 -26.03 -25.55 -24.51 -26.94 -24.69 1987 - 1991 -27.06 -26.65 -25.80 -25.80 -27.25 -25.00 1992 - 1996 -26.82 -27.14 -25.37 -25.51 -26.58 -24.93 1997 - 2001 -27.02 -26.56 -25.68 -25.51 -27.29 -25.72 2002 - 2006 -27.78 -26.93 -25.96 -25.60 -27.07 -25.88