Singh, Dharmendra Pratap; Paul, Kaustav; Pawar, Rahul; Rai, Soni; Mohanty, Ranjan Kumar; Laksar, Amzad Hussain; Maurya, Abhayanand Singh (2026): TOC and d13C variability in the NW Himalaya Peat Record during 4.2 ka event [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996524 (DOI registration in progress)
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Published: 2026-08-13
Abstract:
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.
Supplement to:
Singh, Dharmendra Pratap; Paul, Kaustav; Pawar, Rahul; Rai, Soni; Mohanty, Ranjan Kumar; Laksar, Amzad Hussain; Maurya, Abhayanand Singh (2026): North Atlantic linkage to hydroclimatic weakening in the NW Himalaya during the 4.2 ka event. Palaeogeography, Palaeoclimatology, Palaeoecology, 700, 114101, https://doi.org/10.1016/j.palaeo.2026.114101
Funding:
Coverage:
Latitude: 32.472022 * Longitude: 77.612433
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.435 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Depth, sediment/rock, top/minimum | Depth sed top | m | Singh, Dharmendra Pratap | ||
| 2 | Depth, sediment/rock, bottom/maximum | Depth sed bot | m | Singh, Dharmendra Pratap | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Singh, Dharmendra Pratap | Geocode | |
| 4 | AGE | Age | ka BP | Singh, Dharmendra Pratap | Age model, Bayesian | Geocode |
| 5 | Carbon, organic, total | TOC | % | Singh, Dharmendra Pratap | Elemental Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS) | |
| 6 | δ13C, total organic carbon | δ13C TOC | ‰ PDB | Singh, Dharmendra Pratap | Elemental Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS) | |
| 7 | Sedimentation rate | SR | cm/ka | Singh, Dharmendra Pratap |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
219 data points