noaa-fire-19922 Dunnette fire data from Chickaree Lake, Rocky Mountain National Park, Colorado - IMPD USCHK001 Dunnette, P.V.; Higuera, P.E.; McLauchlan, K.K.; Derr, K.M.; Briles, C.E.; Keffe, M.H. Dunnette fire data from Chickaree Lake, Rocky Mountain National Park, Colorado - IMPD USCHK001 2015-03-28 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19922 Investigator P.V. Dunnette Investigator P.E. Higuera Investigator K.K. McLauchlan Investigator K.M. Derr Investigator C.E. Briles Investigator M.H. Keffe earth science paleoclimate fire history|paleolimnology delta 15N,sediment,null,per mil AIR,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology delta 13C,sediment,null,per mil PDB,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology depth at sample start,null,null,centimeter,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology nitrogen,sediment,null,percent,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology carbon,sediment,null,percent,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate notes,null,null,null,null,,null,null,C,null earth science paleoclimate fire history|paleolimnology depth at sample end,null,null,centimeter,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology age at sample end,null,null,calendar year before present,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology organic matter,sediment,null,weight percent,null,fire history|paleolimnology,null,loss on ignition,N,combusted 550 degrees C four 4 hours earth science paleoclimate fire history|paleolimnology carbonate,sediment,null,weight percent,null,fire history|paleolimnology,null,loss on ignition,N,combusted 1000 degrees C four 4 hours earth science paleoclimate fire history|paleolimnology age at sample start,null,null,calendar year before present,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology carbon/nitrogen,sediment,null,dimensionless,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology magnetic susceptibility,sediment,null,dimensionless (SI system),null,fire history|paleolimnology,null,null,N,Magnetic susceptibility/sediment accumulation rate earth science paleoclimate fire history|paleolimnology magnetic susceptibility,sediment,null,dimensionless (SI system),null,fire history|paleolimnology,anomalized,null,N,shifted by adding the minimum values earth science paleoclimate fire history|paleolimnology volume,wet sediment,null,milliliter,null,fire history|paleolimnology,null,null,N,null earth science paleoclimate fire history|paleolimnology density,sediment,null,gram per cubic centimeter,null,fire history|paleolimnology,null,null,N,dry grams per wet cm cubed earth science paleoclimate fire history|paleolimnology magnetic susceptibility,sediment,null,dimensionless (SI system),null,fire history|paleolimnology,raw,null,N,null earth science paleoclimate fire history|paleolimnology charcoal,sediment,null,count,null,fire history|paleolimnology,null,null,N,>125 um earth science paleoclimate fire history charcoal sediment geoscientificInformation 4508 cal yr BP -60 cal yr BP Complete 40.334249 40.334249 -105.84727 -105.84727 2796 2796 Continent North America United States Of America Colorado Chickaree Lake>LATITUDE 40.334249>LONGITUDE -105.84727 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Paul V. Dunnette, Philip E. Higuera, Kendra K. McLauchlan, Kelly M. Derr, Christy E. Briles and Margaret H. Keefe 2014 New Phytologist 203 900 - 912 10.1111/nph.12828

Wildfires can significantly alter forest carbon (C) storage and nitrogen (N) availability, but the long-term biogeochemical legacy of wildfires is poorly understood. We obtained a lake-sediment record of fire and biogeochemistry from a subalpine forest in Colorado, USA, to examine the nature, magnitude, and duration of decadal-scale, fire-induced ecosystem change over the past c. 4250 yr. The high-resolution record contained 34 fires, including 13 high-severity events within the watershed. High-severity fires were followed by increased sedimentary N stable isotope ratios (d15N) and bulk density, and decreased C and N concentrations – reflecting forest floor destruction, terrestrial C and N losses, and erosion. Sustained low sediment C : N c. 20–50 yr post-fire indicates reduced terrestrial organic matter subsidies to the lake. Low sedimentary d15N c. 50–70 yr post-fire, coincident with C and N recovery, suggests diminishing terrestrial N availability during stand development. The magnitude of post-fire changes generally scaled directly with inferred fire severity. Our results support modern studies of forest successional C and N accumulation and indicate pronounced, long-lasting biogeochemical impacts of wildfires in subalpine forests. However, even repeated high-severity fires over millennia probably did not deplete C or N stocks, because centuries between high-severity fires allowed for sufficient biomass recovery. STUDY NOTES: Contact person: Philip E. Higuera; Contact person email address: phiguera@uidaho.edu; Sampling date: 2010-08; Water depth (cm): 790; Sampling device: modified Livingstone piston corer; Diameter (cm): 5.0 and 7.6 cm diameter; Supplemental Material Data File Content Details (27 files total): Contents: I. Biogeochemical Data Files (file count: 1) II. Biogenic Silica Data Files (file count: 1) III. Charcoal Data Files (file count: 3) IV. Chronology Data Files (file count: 14) V. Loss-on-ignition Data Files (file count: 1) VI. Magnetic Susceptibility Data Files (file count: 3) VII. Pollen Data Files (file count: 3) Note: All 27 Supplemental Material Data Files of this dataset, listed below, begin with the IMPD code for this dataset: "usck001", and are locate at: http://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/supplemental/ I. Biogeochemical Data Files (file count: 1) A. uschk001-ch10-biogeochemdata.csv Biogeochemical Data This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_biogeochemData.csv This file includes the following raw data (by column): 1. core_ID: Sediment core identifier 2. drive_ID: Drive identifier 3. top_sam #: Top sample number 4. bot_sam #: Bottom sample number 5. top_cm: Top depth of sample (cm) 6. bot_cm: Bottom depth of sample (cm) 7. top_age: Top age of sample (cal. yr before CE 1950) 8. bot_age: Bottom age of sample (cal. yr before CE 1950) 9. d15N: Nitrogen isotopic composition (delta 15N; per mil) 10. %N: Percent Nitrogen (by weight) 11. d13C: Carbon isotopic composition (delta 13C; per mil) 12. %C: Percent Carbon (by weight) 13. C:N_atomic_ratio: Ratio of %C to %N (atomic) 14. bulk_density: Bulk density (dry g wet cm-3) 15. C_acc: Carbon accumulation rate (g cm-2 yr-1) 16. MS_SI : Magnetic susceptibility (SI units) Missing Values: NaN Checksum values: 635 rows (with headers), 16 columns Column 3 (top_sam #): 58551 Column 5 (top_cm): 201836 Column 10 (%N): 626.83 Column 15 (C_acc): 341.58 II. Biogenic Silica Data Files (file count: 1) A. uschk001-ch10-bsi-data.csv Biogenic Silica Data File This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_BSiData This file includes the following raw data (by column): 1. top_cm: top depth of sample (cm) 2. bot_cm: bottom depth of sample (cm) 3. top_age: top age of sample (cal. yr before CE 1950) 4. bot_age: bottom age of sample (cal. yr before CE 1950) 5. %BSi: Percent biogenic silica (by weight) 6. d15NAIR: Nitrogen isotopic composition (delta 15N; per mil) 7. %N: Percent Nitrogen (by weight) 8. d13CVPDB_17O_corrected: Carbon isotopic composition delta 13C; per mil) 9. %C: Percent Carbon (by weight) 10. C:N_atomic_ratio: Ratio of %C to %N (atomic) 11. bulk_density: Bulk density (dry g / wet cm3) Missing Values: None Checksum values: 41 rows (with headers), 11 columns Column 3 (top_cm): 69935 Column 5 (%BSi): 1042.45 Column 10 (C:N): 591.52 III. Charcoal Data Files (file count: 3) Three files, described below, provide the raw input data, the parameters used, and the output data for charcoal analysis via the program CharAnalysis (see Dunnette et al. 2014, Materials and Methods, and https://sites.google.com/site/charanalysis/). A. uschk001-ch10-char-data.csv The raw input data This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_charData.csv,. This file also contains the same information as the charcoal data file for this dataset, which is located at: http://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/uschk001.txt This file includes the following raw data (by column): 1. cmTop: top depth (cm) of the sample 2. cmBot: bottom depth (cm) of the sample 3. ageTop: estimated age at top of sample (cal. yr before CE 1950) 4. ageBot: estimated age at bottom of sample (cal. yr before CE 1950) 5. charVol: volume of sediment subsample from which charcoal was prepared (cm3) 6. charCount: pieces of charcoal counted in the sample (#) Missing values: None Checksum values: 1202 rows (with headers), 6 columns Column 3 (ageTop): 2446519 Column 6 (charCount): 38218 B. uschk001-ch10-char-params.csv The parameters used This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_charParams.csv See CharAnalysis User's Guide for description of parameters file, available at the web site link above. Missing values: -9999 (column 3) or blank cell (all others) Checksum values: 26 rows (with headers), 5 columns Column 3 (Parameters): -39779 C. uschk001-ch10-char-results.csv The output data for charcoal analysis This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_charResults.csv This file includes the following derived data (reflecting interpolation): 1. cmTop_i: top depth (cm) of interpolated sample 2. ageTop_i: bottom depth (cm) of interpolated sample 3. charCount_i: pieces of charcoal in interpolated sample 4. charVol_i: volume of interpolated sample 5. charCon_i: charcoal concentration in interpolated sample (pieces/cm3) 6. charAcc_i: charcoal accumulation rate, based in interpolated concentration and age (pieces/cm2 yr) 7. charBkg: background charcoal, Cback, smoothed based on methods selected in _charParams.csv file, (pieces/cm2 yr) 8. charPeak: peak charcoal, Cpeak, based on methods selected in _charParams.csv file, (pieces/cm2*yr) 9. thresh1: threshold value (pieces/cm2 yr) based on first threshold entered in _charParams.csv file 10. thresh2: same as thresh1, but for second threshold entered 11. thresh3: same as thresh1, but for third threshold entered 12. threshFinalPos: positive threshold value (pieces/cm2 yr), based on fourth threshold value entered in *charParams.csv file 13. threshFinalNeg: negative threshold value (pieces/cm2 yr), based on fourth threshold value entered in *charParams.csv file 14. SNI: signal-to-noise index values, based on threshdFinalPos values 15. threshGOF: P value from KS goodness-of-fit test between fitted noise distribution and empirical data below the sample-specific threshold 16. peaks1: samples that exceed thresh1 values are identified by "1"; only the first sample is identified 17. peaks2: same as peaks1, but for the second threshold value 18. peaks3: same as peaks1, but for the third threshold value 19. peaksFinal: same as peaks1, but for the final threshold value 20. peaksInsig.: peaks that exceeded threshFinalPos (the final threshold), but did not pass the minimum-count test are identified with a "1" 21. peakMag: peak magnitude is the total pieces of charcoal accumulated in a given peak (pieces/cm2*peak); if a peak is only one sample long, then peak magnitude is simply CHAR minus the positive threshold. If a peak is more than one sample long, then each sample exceeding threshFinal is summed 22. smPeak Frequ: frequency of peaks (from peaksFinal) smoothed over time, as set in *_charParams.csv file 23. smFRIs: fire return intervals (from peaksFinal) smoothed over time, as set in *_charParams.csv file Missing values: NaN Checksum values: 458 rows (with headers), 23 columns Column 2 (age Top_i): 1014540 Column 6 (char Acc_i): 753.8938 Column 19 (peaks Final): 36S IV. Chronology Data Files (file count: 14) A. uschk001-ch10_14Cdates.zip Chronology Data - .zip archive includes the .B00` files output from CALIB This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_14Cdates.zip. B. uschk001-ch10-210pb-data.xls Chronology Data - Microsoft Excel format file containing Pb210 Data, Pb210 Params, and PB210 Results (210Pb Ages, and 210Pb Age Model). This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_210Pb_data.xls. c. uschk001-ch10-210pb-input-data.csv Chronology Data - 210Pb Data This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_210Pb_data.xls, tab: Pb210Data. D. uschk001-ch10-210pb-params.csv Chronology Data - 210Pb Parameter Choices This data is also contained in usck001-ch10-210pb-data.xls tab: Pb210Params. This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_210Pb_data.xls, tab: Pb210Params. E. uschk001-ch10-210pb-results-ages.csv Chronology Data - 210Pb Ages This data is also contained in usck001-ch10-210pb-data.xls tab: Pb210Results, table within tab: 210Pb Ages. This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_210Pb_data.xls, tab: Pb210Results, table within tab: 210Pb Ages. F. uschk001-ch10-210pb-results-age-model.csv Chronology Data - 210Pb Age Model This data is also contained in usck001-ch10-210pb-data.xls tab: Pb210Results, table within tab: 210Pb Age Model. This file contains the same information as Dunnette et al. 2014 Supporting Information, CH10_210Pb_data.xls, tab: Pb210Results, table within tab: 210Pb Age Model. G. uschk001-ch10-age-depth-data.csv Supplemental Material: Chronology Data - age-depth data This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.csv. This file includes the following raw data (by column): 1. Top depth of sample (cm) 2. Calibrated age at sample top (cal yr BP) 3. Upper 95% confidence intervals for data in column two 4. Lower 95% confidence intervals for data in column two 5. Sedimentation rate (cm/yr) 6. Upper 95% confidence intervals for data in column five 7. Lower 95% confidence intervals for data in column five 8. Sample resolution (yr/sample) 9. Upper 95% confidence intervals for data in column eight 10. Lower 95% confidence intervals for data in column eight Missing values: None Checksum values: 1596 rows (with headers), 10 columns Column 1 (sampleCm): 642150.9 Column 2 (calAge): 4679522 Column 5 (sedAcc): 211.236 Column 8 (sampleRes): 6860.85 H. uschk001-ch10-age-depth-data.xls Chronology Data - age-depth data in Microsoft Excel file format This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.xls. I. uschk001-ch10-age-depth-input-data-tab Chronology Data - age-depth input data This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.xls, Tab: InputData This file also contains the same content as uschk001-ch10-age-depth-data.xls, Tab: InputData (described above). J. uschk001-ch10-age-depth-input-params-tab Chronology Data - age-depth input parameters This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.xls, Tab: InputParams This file also contains the same content as uschk001-ch10-age-depth-data.xls, Tab: InputParams (described above). K. uschk001-ch10-age-depth-pb210-data-tab Chronology Data - age-depth pb21 data This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.xls, Tab: pb210Data This file also contains the same content as uschk001-ch10-age-depth-data.xls, Tab: pb210Data (described above). L. uschk001-ch10-age-depth-calib-dates-tab Chronology Data - age-depth input parameters This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.xls, Tab: calibDates This file also contains the same content as uschk001-ch10-age-depth-data.xls, Tab: calibDates (described above). M. uschk001-ch10-age-depth-chron-tab Chronology Data - age-depth input parameters This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_ageDepthData.xls, Tab: chronology This file also contains the same content as uschk001-ch10-age-depth-data.xls, Tab: chronology (described above). N. uschk001-ch10_radiometric-samples.csv Chronology Data - radiometric samples. This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_radiometricSamples.csv. This file also contains the same content as the Chronology section of this dataset for the Charcoal, Loss-on-ignition, and Magnetic Susceptibility data files, respectively named uschk001.txt, uschk001.loi, and uschk001.mag, and all located at http://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/ V. Loss-on-ignition Data Files (file count: 1) A. uschk001-ch10-loi-data.csv Loss-on-ignition data This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_LOI_Data.csv. This file also contains the same content as the Data section of the Loss-on-ignition file for this dataset, located at: http://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/uschk001.loi Note: for usck001.loi, core_ID, drive_id, top_sam#, and bot_sam# have been concatenated into the last column with heading, Notes. This file includes the following raw data (by column): 1. core_ID: Sediment core identification number 2. drive_ID: Drive identifier 3. top_sam #: Top sample number 4. bot_sam #: Bottom sample number 5. top_cm: top depth of sample (cm) 6. bot_cm: bottom depth of sample (cm) 7. top_age: top age of sample (cal. yr before CE 1950) 8. bot_age: bottom age of sample (cal. yr before CE 1950) 9. d15N: Nitrogen isotopic composition (delta 15N; per mil) 10. %N: Percent nitrogen (by weight) 11. d13C: Carbon isotopic composition (delta 13C; per mil) 12. %C: Percent carbon (by weight) 13. C:N_atomic_ratio: Ratio of %C to %N (atomic) 14. bulk_density: Bulk density (dry g wet cm-3) 15. LOI_550: Loss on ignition at 550 C (% organic matter; multiply by 100) 16. LOI_1000: Loss on ignition at 1000 C (% organic matter; multiply by 100) Missing Values: None Checksum values: 124 rows (with headers), 16 columns Column 3 (top_samp #): 12010 Column 5 (top_cm): 31833.7 Column 10 (%N): 161.05 Column 15 (LOI_550): 38.63 VI. Magnetic Susceptibility Data Files (file count: 3) Three files (Cuschk001-ch10-ms-char-data.csv, uschk001-ch10-ms-char-params.csv, uschk001-ch10-ms-char-results.csv, described below) provide the raw input data, the parameters used, and the output data for peak analysis of magnetic susceptibility (MS) data, using the program CharAnalysis (see Materials and Methods in main text, and web site https://sites.google.com/site/charanalysis/). The column headers for all files are the same as for charcoal analysis (CH10_char* files), but NOTE that the units for MS have been manipulated to be able to be used in CharAnalysis (see below). A. uschk001-ch10-ms-char-data.csv Raw input data This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_MS_charData.csv. This file also contains the same content as the Data section of the Magnetic Susceptibility file for this dataset, locted at: http://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/uschk001.mag, minus the "dummyVar" column. This file Includes the following raw data (by column): 1. cmTop: top depth (cm) of the sample 2. cmBot: bottom depth (cm) of the sample 3. ageTop: estimated age at top of sample (cal. yr before CE 1950) 4. ageBot: estimated age at bottom of sample (cal. yr before CE 1950) 5. dummyVar: dummy variable set to 1, to facilitate use in CharAnalysis program 6. MS_shifted_trans: Shifted MS data (from col. 8), transformed by dividing by the sediment accumulation rate (cm/yr). Thus, when these transformed values are multiplied by the sediment accumulation rate (cm/yr), as done in CharAnalysis, the result is the transformed MS values (column 8). 7. MS_raw_SI: Raw magnetic susceptibility measurements (SI units) 8. MS_shifted: Raw MS values, shifted by adding the minimum values in MS_raw_SI to each value, such that the minimum value becomes 0. CharAnalysis cannot work with negative data. Missing values: None Checksum values: 1477 rows (with headers), 8 columns Column 3 (ageTop): 3970165 Column 6 (setRate/MS): 0.3626761 B. uschk001-ch10-ms-char-params.csv The parameters used This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_MS_charParams.csv C. uschk001-ch10-ms-char-results.csv Output data for peak analysis of magnetic susceptibility (MS) data This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_MS_charResults.csv. VII. Pollen Data Files (file count: 3) A. uschk001-ch10-pollen-counts.csv Raw pollen data reported as pollen counts This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_PollenCounts.csv B. uschk001-ch10-pollen-counts.xls Raw pollen data reported as pollen counts (in Microsoft Excel format file) This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_PollenCounts.xls This file also contains the same content as uschk001-ch10-pollen-counts.csv uschk001-ch10-pollen-counts.csv and uschk001-ch10-pollen-counts.xls (described above), include the following raw data (by column): 1. Sample_ID : Identification of sample, by lake (CH), year (07 or 10), core (1 or 2), and drive (A, B,C,...). 2. Sample_number: Sample number for each drive 3. Top_cm: Top depth of each sample (cm) 4. age_yrBP: Age of each sample, in calibrated years before present (CE 1950) 5. Pinus hap: Haploxilon Pinus pollen grains counted 6. Pinud dip: Diploxilon Pinus pollen grains counted 7. Pinus undiff: Undifferentiated Pinus pollen grains counted 8. Picea: Picea pollen grains counted 9...112: Column heads are the taxonomic identification for each pollen grain counted 9. Charcoal: NOT COUNTED 10. EU: Exotic pollen grains, added as spike. Missing values: NaN. Checksum values: 46 rows (with headers), 113 columns Column 2 (sample_number): 6143 Column 4 (age_yrBP): 86683 Column 10 (Pseudotsuga/Larix): 42 Column 113 (EU): 8793 C. uschk001-ch10-pollen-percentages.csv Pollen percentages This file contains the same content as Dunnette et al. 2014 Supporting Information, CH10_pollenPercentages.csv This file includes the following raw data (by column): 1. Sample_ID : Identification of sample, by lake (CH), year (07 or 10), core (1 or 2), and drive (A, B, C,...). 2. Sample_number: Sample number for each drive 3. Top_cm: Top depth of each sample (cm) 4. age_yrBP: Age of each sample, in calibrated years before present (CE 1950) 5. Pinus hap: Haploxilon Pinus pollen grains counted 6. Pinud dip: Diploxilon Pinus pollen grains counted 7. Pinus undiff: Undifferentiated Pinus pollen grains counted 8. Picea: Picea pollen grains counted 9...107: Columns heads are the taxonomic identification for each pollen grain counted Missing values: None. Checksum values: 46 rows (with headers), 106 columns Column 2 (sample_number): 6143 Column 4 (age_yrBP): 86683 Column 10 (Pseudotsuga/Larix): 12 Column 102 (Nuphar): 13.19

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/uschk001.loi Loss-on-ignition Data; uschk001.loi GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/uschk001.mag Magnetic Susceptibility Data; uschk001.mag GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/supplemental/uschk001/ Data Folder; Supplemental Material: MS, LOI, chronology, biogenc Silica, bigeochemical, & pollen data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/charcoal/northamerica/uschk001.txt Charcoal Data; uschk001.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11