Data · dataset · 2026
Modern precipitation δ18O and trajectory analysis over the Himalaya-Tibet Orogen from ECHAM5-wiso simulations
Listed in National Center for Atmospheric Research
Variations in oxygen isotope ratios (O-18) measured from modern precipitation and geologic archives provide a promising tool for understanding modern and past climate dynamics and tracking elevation changes over geologic time.
Description
In areas of extreme topography, such as the Tibetan Plateau, the interpretation of O-18 has proven challenging. This study investigates the climate controls on temporal (daily and 6h intervals) and spatial variations in present-day precipitation O-18 (O-18(p)) across the Tibetan Plateau using a 30year record produced from the European Centre/Hamburg ECHAM5-wiso global atmospheric general circulation model (GCM).
Results indicate spatial and temporal agreement between model-predicted O-18(p) and observations. Large daily O-18(p) variations of -25 to +5 occur over the Tibetan Plateau throughout the 30 simulation years, along with interannual O-18(p) variations of similar to 2. Analysis of extreme daily O-18(p) indicates that extreme low values coincide with extreme highs in precipitation amount.
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During the summer, monsoon vapor transport from the north and southwest of the plateau generally corresponds with high O-18(p), whereas vapor transport from the Indian Ocean corresponds with average to low O-18(p). Thus, vapor source variations are one important cause of the spatial-temporal differences in O-18(p). Comparison of GCM and Rayleigh Distillation Model (RDM)-predicted O-18(p) indicates a modest agreement for the Himalaya region (averaged over 86 degrees-94 degrees E), confirming application of the simpler RDM approach for estimating O-18(p) lapse rates across Himalaya.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d7fj2jfw ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/modern-precipitation-i18o-and-trajectory-analysis-over… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=bb4cf649-77dc-42ee-94be-16b5d991c… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
- Inferred from text
- Isotope geochemistry 76% · Simulation 75%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | bb4cf649-77dc-42ee-94be-16b5d991cbaa | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:field:370303 | enrichment · data ucar edu | taxonomy-embedding@1.1.0 | title+keywords+description (76%) |
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[method].local:method:simulation | enrichment · data ucar edu | keyword-concept-rules@1.0.0 | title+description (75%) |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |