======= README for data package accompanying Cobb et al. 2017 ======== Version 1, 2017-05-29 This data package accompanies: Cobb, A.R., A.M. Hoyt, L. Gandois, Jangarun E., R. Dommain, Kamariah A.S., F.M. Kai, N. Salihah H.S., and C.F. Harvey (2017) How temporal patterns in rainfall determine the geomorphology and carbon fluxes of tropical peatlands. Proceedings of the National Academy of Sciences of the United States of America. http://www.pnas.org/cgi/doi/10.1073/pnas.1701090114 This package includes daily average soil CO2 flux measurements and radiocarbon dates appearing in the paper. I would love to hear from you if you find further uses for the data in these files. Please contact me if you find errors or inconsistencies. ====================== Data package contents ========================= - README.txt: This file. - Cobb_et_al_co2_flux_data.txt: Comma-separated text table containing daily averages of barometrically corrected water table height and soil surface CO2 flux, as described in the "Soil respiration" section of the SI Methods. These data appear in Figure 4b of the paper. Fields in the table: - Mean soil surface CO2 flux, umol m-2 s-1: Daily average soil surface CO2 flux averaged across three multiplexed automated soil respiration chambers. - Water table height zeta, cm: Daily average of barometrically corrected water table height. Water table height, represented by Greek letter lowercase zeta in the text, is elevation of the water table minus elevation of the local land surface, as explained in the text. There are no special codes or missing data in the table. - Cobb_et_al_radiocarbon_data.txt: Comma-separated text table containing calibrated radiocarbon dates from peat samples, shown in Figure 7 of the paper. Of the data in the table, 22 the dates from 7 cores first appeared in Gandois et al. (2014), and 7 dates from 1 core first appeared in Dommain et al. (2015), in addition to the 6 dates from 1 core first appearing here, as noted in the "Source" column of the table. Fields in the table: - Laboratory: The laboratory that performed the radiocarbon analysis. NOSAMS -- National Ocean Sciences Accelerator Mass Spectrometry facility at Woods Hole Oceanographic Institution, USA LLNL -- Center for Accelerator Mass Spectrometry at Lawrence Livermore National Laboratory, USA - Core name: A unique name for the peat core from which samples were obtained. - Distance from boundary, km: Distance from dome boundary to core location. - 14C age, yr BP: 14C age provided by the radiocarbon facility. - Sigma range, 14C BP: Sigma range provided by the radiocarbon facility. - Median cal age, yr BP: Median calibrated radiocarbon age obtained from Calib 7.1.0 with the IntCal13 calibration curve. - Material: Material that was submitted to the radiocarbon facility. - Sample ID: Sample ID supplied to the radiocarbon facility. - Site: Core site. - Surface elevation: Surface elevation at the core site, obtained from LiDAR digital terrain map as described in the text (SI Methods, LiDAR data and topography). - Sample depth below surface, m: Depth beneath the local peat surface of the middle of the sample submitted to the radiocarbon facility. - Source: Publication in which the radiocarbon data were first used (references below). - Source DOI: Digital object identifier for the publication in which the radiocarbon data were first used. There are no special codes or missing data in the table. Further notes on radiocarbon dates: The dates listed for core MDM11A-2A are the dates from that core accepted by Dommain et al. (2015) excluding those from pollen, because in that study pollen dates were found to be younger than bulk peat dates. Dates from the core first appearing in this study (MDM11-1A) were used to produce the boundary age model for simulating the development of the Mendaram peat dome. We used sample "MDM11-1A-2L-1 2-3.5 B" (14 Cyperaceae seeds), sample "MDM11-1A-1L-1 50-51A" (bulk peat), and the modern peat surface for the boundary age model. Note that dates from this boundary core are not included in the sample-model comparison plot (Figure 7A) because data from this core were used to force peat accumulation at the model boundary. ========================= Reference list ============================= Gandois, L., R. Teisserenc, A.R. Cobb, Ing C.H., L.B.L. Lim, Kamariah A.S., A. Hoyt and C.F. Harvey (2014) Origin, composition, and transformation of dissolved organic matter in tropical peatlands. Geochimica et Cosmochimica Acta 137:35--47. doi:10.1016/j.gca.2014.03.012. Dommain, R., A.R. Cobb, H. Joosten, P.H. Glaser, A.F.L. Chua, L. Gandois, F.M. Kai, A. Noren, Kamariah A.S., Salihah S. and C.F. Harvey (2015) Forest dynamics and tip-up pools drive pulses of high carbon accumulation rates in a tropical peat dome in Borneo (Southeast Asia). Journal of Geophysical Research: Biogeosciences 120(4):617--640. doi:10.1002/2014JG002796. ========================== Acknowledgements ========================== All co-authors on the paper were involved in collecting the cores for the radiocarbon dates, as were Amy Chua, Rahayu Sukmaria binti Haji Sukri, Watu bin Awok, Azlan Pandai, Rosaidi Mureh, and Muhammad Wafiuddin Zainal Ariffin. In addition, Bernard Jun Long Ng and Watu bin Awok helped to install the soil respiration chambers. We also thank the Brunei Darussalam Heart of Borneo Center, the Brunei Darussalam Ministry of Industry and Primary Resources, and the Brunei Darussalam Forestry Department for making the field work behind these measurements possible. This research was supported by the National Research Foundation Singapore through the Singapore-MIT Alliance for Research and Technology's Center for Environmental Sensing and Modeling interdisciplinary research program and by the US National Science Foundation under Grants 1114155 and 1114161 (to C.F.H.). ========================== Revision history ========================== Version 1.0 - 2017-05-23: Initial packaging. ======================== Contact information ========================= Alex Cobb Singapore-MIT Alliance for Research and Technology Center for Environmental Sensing and Modeling 1 CREATE Way, CREATE Tower #09-03 Singapore 138602 Singapore tel.: +65 6516 6170 fax.: +65 6778 5654 e-mail: alex.cobb@smart.mit.edu