Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://ror.org/00582g326 Paul Kaustav kaustav.paulslg@gmail.com Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://ror.org/00582g326 Pawar Rahul rahul_p@es.iitr.ac.in Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://ror.org/00582g326 Rai Soni s_rai@es.iitr.ac.in Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://ror.org/00582g326 Mohanty Ranjan Kumar ranjanmohanty227@gmail.com Physical Research Laboratory PRL http://www.prl.ernet.in/ https://ror.org/02p0p4q62 Laksar Amzad Hussain amzad@prl.res.in Physical Research Laboratory PRL http://www.prl.ernet.in/ https://ror.org/02p0p4q62 Maurya Abhayanand Singh Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://ror.org/00582g326 2026 TOC and d13C variability in the NW Himalaya Peat Record during 4.2 ka event dataset https://doi.pangaea.de/10.1594/PANGAEA.996524 2026-08-13T14:45:41 This dataset contains high-resolution geochemical measurements from the CT-02 alpine peat profile collected from the Chandra Valley, northwestern Himalaya, Himachal Pradesh, India (32.472022° N, 77.612433° E; 4309 m a.s.l.). The 44 cm peat sequence spans approximately 5.6 to 1.0 ka BP and was sampled at 1 cm intervals. Total organic carbon (TOC, wt.%) and stable carbon isotope ratios of organic matter (δ13C, ‰ VPDB) were measured using an Elemental Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS). The chronology is constrained by six AMS radiocarbon dates obtained from bulk peat organic carbon and calibrated using the IntCal20 calibration curve; an age-depth model was constructed using the Bayesian Bacon approach. TOC values range from 41.39 to 70.76 wt.%, and δ13C values range from −26.04‰ to −23.94‰ VPDB. The record documents centennial- to millennial-scale hydroclimatic variability in a winter precipitation- and snowmelt-sensitive alpine environment, including a pronounced interval of reduced organic accumulation and isotopic enrichment broadly corresponding to the 4.2 ka climatic transition. The dataset provides one of the few published peat-based hydroclimatic records from the westerly-influenced northwestern Himalaya and is suitable for studies of Holocene moisture variability, winter westerly dynamics, snowmelt-driven hydrology, and regional comparisons of the 4.2 ka event across South Asia and western Eurasia. Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Paul Kaustav kaustav.paulslg@gmail.com Pawar Rahul rahul_p@es.iitr.ac.in Rai Soni s_rai@es.iitr.ac.in Mohanty Ranjan Kumar ranjanmohanty227@gmail.com Laksar Amzad Hussain amzad@prl.res.in Maurya Abhayanand Singh 2026 North Atlantic linkage to hydroclimatic weakening in the NW Himalaya during the 4.2 ka event journal article Palaeogeography, Palaeoclimatology, Palaeoecology 700 https://doi.org/10.1016/j.palaeo.2026.114101 114101 77.612433 77.612433 32.472022 32.472022 77.612433 32.472022 0.005 0.435 Indian Institute of Technology Roorkee IITR http://www.iitr.ac.in/ https://doi.org/10.13039/501100003511 FIG-100889 CT-02_peat_profile 32.472022 77.612433 Chandra Valley, northwestern Himalaya, India 4309.0 Peat profile 219 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Depth, sediment/rock, top/minimum Depth sed top m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock http://purl.obolibrary.org/obo/ENVO_00001995 minimum Length L http://dbpedia.org/resource/Length Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Depth sed top [m] Depth, sediment/rock, bottom/maximum Depth sed bot m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock http://purl.obolibrary.org/obo/ENVO_00001995 maximum Length L http://dbpedia.org/resource/Length Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Depth sed bot [m] DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Depth sed [m] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Age model, Bayesian Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 Age [ka BP] Carbon, organic, total TOC % carbon C https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27594 organic total https://www.oxforddictionaries.com/definition/american_english/total Dimensionless Ratio ψ Elemental Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS) Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 TOC [%] δ13C, total organic carbon δ13C TOC ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes total organic carbon TOC Elemental Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS) Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 δ13C TOC [‰ PDB] Sedimentation rate SR cm/ka sedimentation rate Singh Dharmendra Pratap dharmendra.singh@es.iitr.ac.in 0000-0001-5563-1633 SR [cm/ka] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels d13C Himalayas Peat author117229 author118675 author118676 author118677 author118678 author74609 author89420 award5207 curlevel30 event3424291 funder22743 geocode1 geocode1600 geocode1601 geocode2205 geocode8128 inst1883 inst22743 journal12485 license21 method14139 method15191 method19513 param178882 param518755 param518756 param67 param7 pi74609 ref141067 term1073089 term1073130 term1073131 term1073132 term1073135 term38253 term38263 term38303 term38477 term38492 term41019 term41056 term43398 term43794 term43863 term43975 term44419 term47498 term53817 term77412 term78493