Supplement 3. Raw and analyzed charcoal data for the past 3000 years for Raven, Uchugrak, Poktovik, and Little Isac lakes.

File List LI07_charData.csv<br> LI07_charParams.csv<br> LI07_charResults.csv<br> PO07_charData.csv<br> PO07_charParams.csv<br> PO07_charResults.csv<br> RA07_charData.csv<br> RA07_charParams.csv<br> RA07_charResults.csv<br> UC07_charData.csv<br> UC07_charParams.csv<br> UC07_charResults.csv Description For each site, three files provide the raw input data, the parameters used, and the output data for charcoal analysis via the program CharAnalysis (see ‘Methods’ in main text). File names reference site codes: LI (Little Isac), PO (Poktovik), RA (Raven), and UC (Uchugrak). The “*_charResults.csv” files has data on fire return intervals and smoothed fire frequency removed, given that these calculations were done outside of the program and do not reflect the time intervals given in the *_charParams.csv files. Missing values denoted by -9999 (*_charParams.csv) or NaN (*_charResults.csv). **07_charData.csv includes the following <b>raw</b> data (by column): cmTop: top depth (cm) of the sample<br> cmBot: bottom depth (cm) of the sample<br> ageTop: estimated age at top of sample (cal. yr before CE 1950)<br> ageBot: estimated age at bottom of sample (cal. yr before CE 1950)<br> charVol: volume of sediment subsample from which charcoal was prepared (cm³)<br> charCount: pieces of charcoal counted in the sample (#) Checksum values:<br> LI07_charData.csv: 192 rows (with headers), 6 columns Column 3 (ageTop (yr BP)): 313963<br> Column 6 (charCount (#)):1586 PO07_charData.csv: 234 rows (with headers), 6 columns Column 3 (ageTop (yr BP)): 438415<br> Column 6 (charCount (#)): 823 RA07_charData.csv: 302 rows (with headers), 6 columns Column 3 (ageTop (yr BP)): 448677<br> Column 6 (charCount (#)): 556 UC07_charData.csv: 393 rows (with headers), 6 columns Column 3 (ageTop (yr BP)): 534182<br> Column 6 (charCount (#)): 543 **07_charParams.csv: See CharAnalysis User’s Guide for description of parameters file, available at the web site linked to above. Checksum values: LI07_charParams.csv: 26 rows (with headers), 5 columns Column 3 (Parameters): -49519.821 PO07_ charParams.csv: 26 rows (with headers), 5 columns Column 3 (Parameters): -52975.821 RA07_ charParams.csv: 26 rows (with headers), 5 columns Column 3 (Parameters): -5199.821 UC07_ charParams.csv: 26 rows (with headers), 5 columns Column 3 (Parameters): -51479.821 **07_charResults.csv includes the following <b>derived</b> data (reflecting interpolation) cmTop_i: top depth (cm) of interpolated sample<br> ageTop_i: bottom depth (cm) of interpolated sample<br> charCount_i: pieces of charcoal in interpolated sample<br> charVol_i: volume of interpolated sample<br> charCon_i: charcoal concentration in interpolated sample (pieces/cm³)<br> charAcc_i: charcoal accumulation rate, based in interpolated concentration and age (pieces/cm²*yr)<br> charBkg: background charcoal, C_back, smoothed based on methods selected in *_charParams.csv file, (pieces/cm²*yr)<br> charPeak: peak charcoal, C_peak, based on methods selected in *_charParams.csv file, (pieces/cm²*yr)<br> thresh1: threshold value (pieces/cm²*yr) based on first threshold entered in *_charParams.csv file<br> thresh2: same as thresh1, but for second threshold entered<br> thresh3: same as thresh1, but for third threshold entered<br> threshFinalPos: positive threshold value (pieces/cm²*yr), based on fourth threshold value entered in *charParams.csv file.<br> threshFinalNeg: negative threshold value (pieces/cm²*yr), based on fourth threshold value entered in *charParams.csv file.<br> SNI: signal-to-noise index values, based on threshdFinalPos values.<br> threshGOF: <i>P</i> value from KS goodness-of-fit test between fitted noise distribution and empirical data below the sample-specific threshold. <br> peaks1: samples that exceed thresh1 values are identified by “1”; only the first sample is identified.<br> peaks2: same as peaks1, but for the second threshold value<br> peaks3: same as peaks1, but for the third threshold value<br> peaksFinal: same as peaks1, but for the final threshold value<br> peaksInsig.: peaks that exceeded threshFinalPos (the final threshold), but did not pass the minimum-count test are identified with a “1”<br> 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. Checksum values: LI07_charResults.csv: 206 rows (with headers), 21 columns Column 2 (age Top_i): 301965<br> Column 6 (char Acc_i): 9.139<br> Column 19 (peaks Final): 14 PO07_charResults.csv: 206 rows (with headers), 21 columns Column 2 (age Top_i): 301965<br> Column 6 (char Acc_i): 4.5649<br> Column 19 (peaks Final): 12 RA07_charResults.csv: 206 rows (with headers), 21 columns Column 2 (age Top_i): 301965<br> Column 6 (char Acc_i): 3.1762<br> Column 19 (peaks Final): 17 UC07_charResults.csv: 206 rows (with headers), 21 columns Column 2 (age Top_i): 301965<br> Column 6 (char Acc_i): 3.655<br> Column 19 (peaks Final): 24