This Yu_Readme20191031.txt file was generated on 20191031 by Kailiang Yu Links to Publication Field updated. 2021-12-09, SES ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Data for ‘Pervasive decreases in living vegetation carbon turnover time across forest climate zones’ PNAS 2. Author Information Principal Investigator Contact Information Name: Yu, Kailiang Institution: University of Utah Address: Department of Biology, University of Utah, Salt Lake City, UT 84112 Email: ky9hc@virginia.edu Alternate Contact Information Name: Anderegg, William Institution: University of Utah Address: Department of Biology, University of Utah, Salt Lake City, UT 84112 Email: anderegg@utah.edu 3. Date of data collection (single date, range, approximate date) <2018-2019> Research weas conducted 2018-2019; data range varied depending on source 4. Geographic location of data collection (where was data collected?): South and North America and Europe 5. Information about funding sources that supported the collection of the data: W.R.L.A. acknowledges funding from the David and Lucille Packard Foundation, NSF Grants 1714972 and 1802880, the USDA National Institute of Food and Agriculture, the Agricultural and Food Research Initiative Competitive Programme, and Ecosystem Services and Agro-ecosystem Management, grant no. 2018-67019-27850. J.S and J.P. acknowledge funding from the European Research Council Synergy grant ERC-SyG-2013-610028 IMBALANCE-P. A.T.T. acknowledges support from the USDA National Institute of Food and Agriculture Postdoctoral Research Fellowship Grant No. 2018-67012-28020. K.Z. acknowledges funding from the Faculty Research Grant awarded by the Committee on Research from the University of California, Santa Cruz. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: Please acknowledge the use of this data in any publications. This data is provided as is without any express or implied warranties whatsoever. 2. Links to publications that cite or use the data: Yu, K., Smith, W. K., Trugman, A. T., Condit, R., Hubbell, S. P., Sardans, J., ... & Anderegg, W. R. (2019). Pervasive decreases in living vegetation carbon turnover time across forest climate zones. Proceedings of the National Academy of Sciences, 116(49), 24662-24667. https://doi.org/10.1073/pnas.1821387116 3. Links to other publicly accessible locations of the data:NA 4. Links/relationships to ancillary data sets:NA 5. Was data derived from another source? If yes, list source(s): NPP and carbon stocks of eight Earth system models from Phase 5 of the Coupled Model Intercomparison Project (CMIP5) are publicly available at https://cmip.llnl.gov/cmip5/data_portal.html Historical and projected annual CO2 concentrations (RCP 8.5) assuming no spatial variation downloaded from https://tntcat.iiasa.ac.at/RcpDb/dsd?Action=htmlpage&page=download. For forest plot analysis, climate data of annual precipitation and temperate used for temperate and cold forests were acquired from Climate data for North America (ClimateNA) https://sites.ualberta.ca/~ahamann/data/climatena.html with a spatial resolution of 1 km 6. Recommended citation for the data: Yu K, Smith WK, Trugman A, Condit R, Hubbell SP, Sardans J, Peng CH, Peñuelas J, Cailleret M, Levanic T, Gessler A, Schaub M, Ferretti M, and Anderegg WRL. 2019 Data for "Pervasive decreases in living vegetation carbon turnover time across forest climate zones" PNAS.The Hive: University of Utah Research Data Repository. Please acknowledge the use of this data in any publications. --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: data_deposite_plot_scale_PNAS Short description: The forest plot dataset containing time series of growth, carbon stock, carbon loss from mortality, and living vegetation carbon turnover time, forest age (when available), as well as climate at each plot. 2. Relationship between files:NA 3. Additional related data collected that was not included in the current data package: NA 4. Are there multiple versions of the dataset? no -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Quantification of growth, carbon loss from mortality, carbon stock, and living vegetation carbon turnover time: Quantification of living vegetation carbon turnover time requires time series data of carbon stock and growth. Carbon stock is quantified as a point measurement at a given time (plot census) and can change with time while growth and carbon loss are variables quantified over the time interval between plot censuses. Thus, in this study the instantaneous living vegetation carbon turnover time is quantified as carbon stock in the previous time step divided by carbon loss in the current time interval. In forest plot data, we considered only long-term forest plots that did not experience disturbances such as fires or harvest during the measurement period. Carbon stock, defined as aboveground carbon in living vegetation with time, was quantified using equation, dCS/dt=Growth- carbon loss, where carbon loss is flux of vegetation carbon out of living vegetation pools. Assuming no human disturbance, aboveground living vegetation carbon loss is primarily associated with tree mortality. Growth was quantified including components of recruitment of new trees and growth of surviving trees while carbon loss was quantified through tree mortality in each census interval. Carbon stock (kg m2-) was normalized by diving by plot area, while growth (kg m2- y-1) and carbon loss (kg m2- y-1) were normalized by diving by plot area and time interval. Quantification of climate: We used historical and projected annual CO2 concentrations (RCP 8.5) assuming no spatial variation downloaded from https://tntcat.iiasa.ac.at/RcpDb/dsd?Action=htmlpage&page=download. For our forest plot analysis, climate data of annual precipitation and temperate used for temperate and cold forests were acquired from Climate data for North America (ClimateNA) (https://sites.ualberta.ca/~ahamann/data/climatena.html) with a spatial resolution of 1 km. For our forest plots located in the tropical climate zone, as well as temperate and cold climate zones in Europe, ClimateNA was unavailable. Thus we used the Climatic Research Unit (CRU) Time-Series (TS) version 4.00 of high-resolution (0.5 * 0.5 km) gridded annual climate data. Latitude, longitude and elevation (if available) of each plot were used to extract climate data based on proximity of forest plots. To evaluate the dependence of temporal trends of forest growth, carbon loss and living vegetation carbon turnover time on climate, mean values of annual climate (precipitation and temperature) and its anomaly were quantified for each census interval. Climate anomalies were quantified as Z-scores. Methods are described in: Yu K, Smith WK, Trugman A, Condit R, Hubbell SP, Sardans J, Peng CH, Peñuelas J, Cailleret M, Levanic T, Gessler A, Schaub M, Ferretti M, and Anderegg WRL. Pervasive decreases in living vegetation carbon turnover time across forest climate zones. Proceedings of the National Academy of Sciences of the United States of America Yu_Supporting_Materail20191031.pdf 1. Number of variables: 13 (Plot,Latitude,Longitude,Climate_zones,Carbon_turnover, Growth, Carbon_loss, Carbon_stock, Year, Pre, CO2, Tem, Age) 2. Number of cases/rows: 2307 3. Variable List A. Name: Plot Description: Plot name B. Name: Latitude Description: Degrees latitude C. Name: Longitude Description: Degrees longitude D. Name: Climate_zones Description: Classified by Köppen-Geiger climate classification E. Name: Carbon_turnover Description: Carbon turnover time (yr) F. Name: Growth Description: Woody production (Kg m-2 y-1) G. Name: Carbon_loss Description: Carbon loss from mortality (Kg m-2 y-1) H. Name: Carbon_stock Description: Carbon stock (Kg m-2) I. Name: Year Description: Forest inventory year J. Name: Pre Description: Precipitation (mm) K. Name: C02 Description: atmospheric CO2 concentration (ppm) L. Name: Tem Description: Temperature (Celsius) M. Name: Age Description: Forest age (yr); some plots do not have forest age data 4. Missing data codes: Code/symbol nan (ocean values)