location year season sample_type depth UCIAMS_num Fm Fm_stdev d14C d14C_stdev C14_age C14_age_stdev HOT 2014 Summer Total DOC 7.5 158141 0.7911 0.0026 -215.1 2.6 1880 30 HOT 2014 Summer Total DOC 400 158145 0.6343 0.0023 -370.6 2.3 3655 30 HOT 2014 Summer Total DOC 850 158144 0.5375 0.0026 -466.7 2.6 4985 40 HOT 2014 Summer Total DOC 2500 158143 0.4663 0.0020 -537.4 2.0 6130 35 HOT 2015 Spring Total DOC 7.5 164612 0.7715 0.0019 -234.5 1.9 2085 25 HOT 2015 Spring Total DOC 400 164613 0.6308 0.0017 -374.1 1.7 3700 25 HOT 2015 Spring Total DOC 850 168551 0.5140 0.0018 -490.0 1.8 5345 30 HOT 2015 Spring Total DOC 2500 168540 0.4519 0.0022 -551.6 2.2 6380 40 BATS 2016 Spring Total DOC 7.5 180280 0.8204 0.0018 -186.1 4.0 1590 20 BATS 2016 Spring Total DOC 400 180269 0.6793 0.0016 -326.1 4.0 3105 20 BATS 2016 Spring Total DOC 850 180271 0.5662 0.0016 -438.3 4.0 4570 25 BATS 2016 Spring Total DOC 2500 180276 0.6129 0.0018 -392.0 4.0 3930 25