This "Vaughan_2019_Climate_effect_on_PP_wood_density.txt" file was generated on 20190717 by Damon Vaughan ------------------- GENERAL INFORMATION ------------------- Title of Dataset: Climate has a larger effect than stand basal area on wood density in Pinus ponderosa var. scopulorum in the southwestern USA [Data file] Author Information: Principal Investigator: David Auty, Northern Arizona University School of Forestry 200 E Pine Knoll Drive Flagstaff AZ 86011, david.auty@nau.edu Associate or Co-investigator: Damon Vaughan, Northern Arizona University School of Forestry 200 E Pine Knoll Drive Flagstaff AZ 86011, drv59@nau.edu Date of data collection: 20170501 - 20181031 Geographic location of data collection: NW of Flagstaff, AZ, USA. GPS coordinates: 35°16’11’’N, 11°44’30’’W Information about funding sources or sponsorship that supported the collection of the data: Funding for the project was provided by McIntire-Stennis appropriations to Northern Arizona University and the State of Arizona. Additional funding was provided by the Ecological Restoration Institute. -------------------------- SHARING/ACCESS INFORMATION -------------------------- Licenses/restrictions placed on the data, or limitations of reuse: None Recommended citation for the data: Vaughan, D.R., Auty, D. (2019). Climate has a larger effect than stand basal area on wood density in Pinus ponderosa var. scopulorum in the southwestern USA [Data file]. OpenKnowledge@NAU. http://openknowledge.nau.edu/id/eprint/5503 -------------------- DATA & FILE OVERVIEW -------------------- File list and brief description of all data files: "Climate_Data.csv": Annual and quarterly climatic variables including Palmer Drought Severity Index (PDSI; dimensionless index), total precipitation (PRCP; mm), and average temperature (TAVG; Celsius) "Density_Summaries.csv": Annual summaries of wood density metrics, including average density, minimum density, maximum density, and earlywood/latewood components. Relationship between files: Climate data, at an annual or quarterly scale, are used as predictor varables for wood density data. If data was derived from another source, list source: PRCP and TAVG were obtained from the Global Summaries of the Month, produced by the National Centers for Environmental Information (NCEI, National Oceanic and Atmospheric Administration [NOAA]). PDSI was downloaded from the National Climatic Data Center (NCDC, NOAA), using Arizona Division 2. -------------------------- METHODOLOGICAL INFORMATION -------------------------- Data collection and processing: Vaughan et al. 2019. Climate has a larger effect than stand basal area on wood density in Pinus ponderosa var. scopulorum in the southwestern USA. Annals of Forest Science (in press). Description of methods used for collection/generation of data: In brief, we destructively sampled 54 trees to produce pith-to-bark samples for X-ray densitometry. Samples were collected from multiple heights in each tree: every 8 feet from ground level, with an additional sample taken from breast height. Methods for processing the data: We scanned the samples on a QTRS X-ray densitometer, and summarised the density readings to an annual scale. Quality-assurance procedures performed on the data: We performed statistical cross-dating to validate the tree ring dating, using dplR in the R programming environment. People involved with sample collection, processing, analysis and/or submission: Manuscript authors were Damon Vaughan, David Auty, Thomas Kolb, Andrew Sanchez Meador, Kurt Mackes, Joseph Dahlen, and W. Keith Moser. James Forst and Scarlet Jackson assisted with sample collection. -------------------------- DATA-SPECIFIC INFORMATION ("Climate_Data.csv") -------------------------- Number of variables: 16 Number of cases/rows: 98 Variable list, defining any abbreviations, units of measure, codes or symbols used: grow.yr: Water year, which runs from previous October to current September PDSI.1: Palmer Drought Severity Index for first quarter of water year. Dimensionless index from -5 (severe drought) to +5 (wet year) PDSI.2: second quarter PDSI.3: third quarter PDSI.4: fourth quarter PRCP.1: Total precipitation for first quarter of water year. mm. PRCP.2: second quarter PRCP.3: third quarter PRCP.4: fourth quarter TAVG.1: Average temperature for first quarter of water year. Celsius TAVG.2: second quarter TAVG.3: third quarter TAVG.4: fourth quarter PRCPtot: Total annual precipitation TAVGavg: Average annual temperature PDSIavg: Average annual PDSI Missing data codes: No missing data -------------------------- DATA-SPECIFIC INFORMATION ("Density_Summaries.csv") -------------------------- Number of variables: 21 Number of cases/rows: 16844 Variable list, defining any abbreviations, units of measure, codes or symbols used: SampleID: Unique ID for each sample, including site, plot, tree, and vertical position SiteID: All are TW for Taylor Woods PlotID: 1-18 TreeID: Unique tree identifier, combination of Plot and Tree # Position: Numbered position identifying height. 1 = .5 ft, 45 = 4.5 feet (breast height disk), 2 = 8, 3 = 16, 4 = 24... Sample.HT: Sample height in meters. This is the height from which the disk was cut. Year: Year corresponding to radial growth Ring.Num: Cambial age. The ring adjacent to the pith was always 1. RD: Ring density in kg m-3 minD: Minimum density in kg m-3 MXD: Maximum latewood density in kg m-3 EWD: Average earlywood density in kg m-3 LWD: Average latewood density in kg m-3 RW: Ring width in mm mmRingStart: Distance to start of ring along the pith-to-bark profile (mm) distToMin: Within-ring distance to the minimum density value (mm) EWW: Earlywood width in mm LWW: Latewood width in mm GSL: Plot-level growing stock level, in ft2 acre-1 LWP: Latewood proportion BAI: Basal area increment in cm2 Missing data codes: NA