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
LI07_charParams.csv
LI07_charResults.csv
PO07_charData.csv
PO07_charParams.csv
PO07_charResults.csv
RA07_charData.csv
RA07_charParams.csv
RA07_charResults.csv
UC07_charData.csv
UC07_charParams.csv
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 raw data (by column):
cmTop: top depth (cm) of the sample
cmBot: bottom depth (cm) of the sample
ageTop: estimated age at top of sample (cal. yr before CE 1950)
ageBot: estimated age at bottom of sample (cal. yr before CE 1950)
charVol: volume of sediment subsample from which charcoal was prepared (cm3)
charCount: pieces of charcoal counted in the sample (#)Checksum values:
LI07_charData.csv: 192 rows (with headers), 6 columnsColumn 3 (ageTop (yr BP)): 313963PO07_charData.csv: 234 rows (with headers), 6 columns
Column 6 (charCount (#)):1586Column 3 (ageTop (yr BP)): 438415RA07_charData.csv: 302 rows (with headers), 6 columns
Column 6 (charCount (#)): 823Column 3 (ageTop (yr BP)): 448677UC07_charData.csv: 393 rows (with headers), 6 columns
Column 6 (charCount (#)): 556Column 3 (ageTop (yr BP)): 534182
Column 6 (charCount (#)): 543**07_charParams.csv:
**07_charResults.csv includes the following derived data (reflecting interpolation)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 columnsColumn 3 (Parameters): -49519.821PO07_ charParams.csv: 26 rows (with headers), 5 columnsColumn 3 (Parameters): -52975.821RA07_ charParams.csv: 26 rows (with headers), 5 columnsColumn 3 (Parameters): -5199.821UC07_ charParams.csv: 26 rows (with headers), 5 columnsColumn 3 (Parameters): -51479.821cmTop_i: top depth (cm) of interpolated sample
ageTop_i: bottom depth (cm) of interpolated sample
charCount_i: pieces of charcoal in interpolated sample
charVol_i: volume of interpolated sample
charCon_i: charcoal concentration in interpolated sample (pieces/cm3)
charAcc_i: charcoal accumulation rate, based in interpolated concentration and age (pieces/cm2*yr)
charBkg: background charcoal, Cback, smoothed based on methods selected in *_charParams.csv file, (pieces/cm2*yr)
charPeak: peak charcoal, Cpeak, based on methods selected in *_charParams.csv file, (pieces/cm2*yr)
thresh1: threshold value (pieces/cm2*yr) based on first threshold entered in *_charParams.csv file
thresh2: same as thresh1, but for second threshold entered
thresh3: same as thresh1, but for third threshold entered
threshFinalPos: positive threshold value (pieces/cm2*yr), based on fourth threshold value entered in *charParams.csv file.
threshFinalNeg: negative threshold value (pieces/cm2*yr), based on fourth threshold value entered in *charParams.csv file.
SNI: signal-to-noise index values, based on threshdFinalPos values.
threshGOF: P value from KS goodness-of-fit test between fitted noise distribution and empirical data below the sample-specific threshold.
peaks1: samples that exceed thresh1 values are identified by “1”; only the first sample is identified.
peaks2: same as peaks1, but for the second threshold value
peaks3: same as peaks1, but for the third threshold value
peaksFinal: same as peaks1, but for the final threshold value
peaksInsig.: peaks that exceeded threshFinalPos (the final threshold), but did not pass the minimum-count test are identified with a “1”
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 columnsColumn 2 (age Top_i): 301965PO07_charResults.csv: 206 rows (with headers), 21 columns
Column 6 (char Acc_i): 9.139
Column 19 (peaks Final): 14Column 2 (age Top_i): 301965RA07_charResults.csv: 206 rows (with headers), 21 columns
Column 6 (char Acc_i): 4.5649
Column 19 (peaks Final): 12Column 2 (age Top_i): 301965UC07_charResults.csv: 206 rows (with headers), 21 columns
Column 6 (char Acc_i): 3.1762
Column 19 (peaks Final): 17Column 2 (age Top_i): 301965
Column 6 (char Acc_i): 3.655
Column 19 (peaks Final): 24