NOAA/WDS Paleoclimatology - Tham Doun Mai Cave, Laos 1900 Year Speleothem d18O and d13C Data
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Cave. The data include parameters of speleothems with a geographic location of Laos, Southeastern Asia. The time period coverage is from 2001 to 71 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
Dataset Citation
- Cite as: Wang, J.K.; Johnson, K.R.; Borsato, A.; Amaya, D.J.; Griffiths, M.L.; Henderson, G.M.; Frisia, S.; Mason, A.J. (2019-08-12): NOAA/WDS Paleoclimatology - Tham Doun Mai Cave, Laos 1900 Year Speleothem d18O and d13C Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/2bzt-2w08. Accessed [date].
- Please refer to Credit tab for full citation information.
Dataset Identifiers
- doi:10.25921/2bzt-2w08
- noaa-cave-27332
- NCEI DSI 1200_02
- NCEI DSI 1200_01
ISO 19115-2 Metadata
noaa-cave-27332
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: -51 CE to 1879 CE; Date Range: 2001 cal yr BP to 71 cal yr BP; |
Time Period | -51 to 1879 |
Spatial Bounding Box Coordinates |
West: 102.65
East: 102.65
South: 20.75
North: 20.75
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns |
Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information | STUDY NOTES: Speleothem oxygen (d18O) and carbon (d13C) data from northern Laos spanning the last two millennia ABSTRACT SUPPLIED BY ORIGINATOR: The spatiotemporal variability of the Asian Monsoon (AM) over the last two millennia has been attributed to a combination of external solar and volcanic forcing and/or internal coupled atmosphere-ocean dynamics, but the relative importance of these mechanisms remains unresolved. The present knowledge of multidecadal to centennial-scale AM variability over Mainland Southeast Asia is not well-constrained, despite substantial progress in understanding seasonal to decadal variability from tree ring records. Here we present the first high-resolution stable isotope (d13C and d18O) speleothem record from northern Laos spanning the Common Era (~50 BCE to 1880 CE). The d13C record reveals substantial centennial-scale fluctuations primarily driven by local water balance. Notably, the driest period at our site occurred from ~1280 to 1430 CE, during the time of the Angkor droughts, supporting previous findings that this megadrought likely impacted much of Mainland Southeast Asia. In contrast, variations in stalagmite d18O reflect changes in rainfall upstream from our study site. Interestingly, the d18O record exhibits a positive correlation with solar activity that persists after 1200 CE, contrary to the findings in previous studies. Solar-forced climate model simulations reveal that these d18O variations may be driven by solar-forced changes in upstream rainout over the tropical Indian Ocean, which modify the d18O of moisture transported to our study site without necessarily affecting local rainfall amount. We conclude that future rainfall changes in Mainland Southeast Asia are likely to be superimposed on multidecadal to centennial-scale variations in background climate driven primarily by internal climate variability, whereas solar forcing may impact upstream rainout over the Indian Ocean. |
Purpose | Records of past temperature, precipitation, and other aspects of climate derived from mineral deposits found in caves. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Last Modified: 2023-12-18
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov