https://doi.pangaea.de/10.1594/PANGAEA.996524Singh, Dharmendra PratapDharmendra PratapSingh0000-0001-5563-1633Indian Institute of Technology RoorkeePaul, KaustavKaustavPaulIndian Institute of Technology RoorkeePawar, RahulRahulPawarIndian Institute of Technology RoorkeeRai, SoniSoniRaiIndian Institute of Technology RoorkeeMohanty, Ranjan KumarRanjan KumarMohantyPhysical Research LaboratoryLaksar, Amzad HussainAmzad HussainLaksarPhysical Research LaboratoryMaurya, Abhayanand SinghAbhayanand SinghMauryaIndian Institute of Technology RoorkeePANGAEA2026d13CHimalayasPeatDepth, sediment/rock, top/minimumDepth, sediment/rock, bottom/maximumDEPTH, sediment/rockAGECarbon, organic, totalδ13C, total organic carbonSedimentation ratePeat profileAge model, BayesianElemental Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS)Dataset10.1016/j.palaeo.2026.114101219 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis 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.77.61243332.472022Chandra Valley, northwestern Himalaya, IndiaIndian Institute of Technology Roorkeehttps://doi.org/10.13039/501100003511FIG-100889