noaa-cave-11937 eng; USA utf8 dataset Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2019-06-18 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Central and Northeast India 1000 Year Stalagmite Oxygen Isotope Data 2011-08-07 publication noaa-cave-11937 NCEI DSI 1200_01 Sinha, A. originator Sinha, A. author Berkelhammer, M.B. originator Berkelhammer, M.B. author Stott, L.D. originator Stott, L.D. author Mudelsee, M. originator Mudelsee, M. author Cheng, H. originator Cheng, H. author Biswas, J. originator Biswas, J. author NOAA National Centers for Environmental Information publisher tableDigital 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 India, Southcentral Asia. The time period coverage is from 875 to -58 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. 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. completed Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncdc.noaa.gov/c/images/pc-default-cave.png Paleoclimatology - Speleothem PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Land Records > Cave Deposits Earth Science > Climate Indicators > Paleoclimate Indicators > Speleothems Earth Science > Paleoclimate > Land Records > Cave Deposits theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher earth science > paleoclimate > speleothems earth science > paleoclimate > speleothems earth science > paleoclimate > speleothems > oxygen isotopes theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Monsoon theme Continent > Asia > Southcentral Asia > India> Wah Shikar Cave > LATITUDE 25.25 > LONGITUDE 91.8667 Continent > Asia > Southcentral Asia > India> Jhumar Cave > LATITUDE 18.8667 > LONGITUDE 81.8667 place otherRestrictions Cite as: Sinha, A.; Berkelhammer, M.B.; Stott, L.D.; Mudelsee, M.; Cheng, H.; Biswas, J. (2011-08-07): NOAA/WDS Paleoclimatology - Central and Northeast India 1000 Year Stalagmite Oxygen Isotope Data . [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/11937. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. otherRestrictions None otherRestrictions Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. eng; USA geoscientificInformation Date Range: 1075 AD to 2008 AD; Date Range: 875 cal yr BP to -58 cal yr BP; 81.8667 91.8667 18.8667 25.25 1075 2008 STUDY NOTES: Stalagmite oxygen isotope (d18O) data from two caves located in central and northeast India, plus a composite Core Monsoon Zone stalagmite d18O record, composed of Jhumar Cave d18O data combined with previously published Dandak Cave d18O data. The instrumentally calibrated stalagmite oxygen isotope record (JHU-1) from Jhumar Cave in Central India provides a millennial length (AD 1075 to 2007) history of monsoon rainfall variations over the core monsoon zone of India (CMZ). The record contains 642 oxygen isotope measurements with an average temporal resolution of 1.45 years and its chronology is established by counting annual growth layers. A maximum uncertainty of ~10 years at the bottom of the stalagmite is inferred from multiple counts of growth laminae. A suite of 230Th dates were also obtained to test the annual nature of the laminations (Table S2). While all 230Th ages fall on or near the slope that describe the laminae-based age model, we did not use 230Th dates in constructing the age model because of high detrital thorium of JHU-1 stalagmite, which produced substantially large error in 230Th dates (2 sigma > 200 years). The multicentennial-length (AD 1399 to 2007) speleothem d18O record (WS-B) from Wah Shikar Cave in northeast India is established by 625 d18O measurements with an average temporal resolution of 0.97 years (Table S1). The record provides a history of monsoon rainfall variations over northeast India (NEI). The age model for the WS-B stalagmite is developed from seven 230Th dates, which are in correct stratigraphic order, with 2 sigma error ranging from 28 to 70 years (Table S2). Four additional 230Th dates produced unreasonably high error (> 100 years) and were subsequently discarded. The age model is developed by linearly interpolating between individual dates except for the segment between the bottom two dates where we calculated the age at the bottom of the stalagmite by extrapolating the age-depth curve from two prior better-constrained dates. The Jhumar Cave stalagmite d18O data provides a history of monsoon rainfall variations over the core monsoon zone of India (CMZ). The record complements our previously reported millennial-length (AD 625 to 1562), absolute-dated oxygen isotope record (DAN-D) from Dandak Cave (Berkelhammer et al., 2009; Sinha et al, 2007), which is located ~20 km west of Jhumar Cave. Both oxygen isotope time series were linearly interpolated to an annual timescale and averaged (over the period of overlap) to produce a composite oxygen isotope record that provides a continuous history of the CMZ's monsoon rainfall variations over the past ~1400 years (AD 2007-625) (Table S1). The composite record captures nearly every major drought during the instrumental period as well as historic failures of monsoon, including extended intervals of substantially weaker monsoon during the 14th and 17th century. The latter are independently corroborated by historical accounts and other regional proxy records. Site Locations: Jhumar Cave, Central India: 18°52'N, 81°52'E, 600 masl Wah Shikar Cave, Northeast India: 25°15'N, 91°52'E, 1290 masl Dandak Cave: 19°N, 82°E, 400 masl ABSTRACT SUPPLIED BY ORIGINATOR: The "internally" generated intraseasonal variability of the Indian Summer Monsoon is characterized by intermittent periods of enhanced ("active") and deficient ("break") precipitation, which produce a quasi east-west precipitation dipole over the Indian subcontinent. Here we present multicentennial-length and near annually-resolved reconstructions of monsoon precipitation, inferred from absolute-dated and instrumentally calibrated speleothem oxygen isotope records from regions (central and northeast India) that have diametric responses to active-break monsoon circulation patterns. On centennial timescales (AD 1400-2008), precipitation variability from these two regions exhibit opposing behavior, oscillating between periods with a persistently "active-dominated" (AD ~1700 to 2007) and a "break- dominated" (AD 1400 to ~1700) regime. The switch between these regimes occurs abruptly (within decades) at a time (AD ~1650-1700) when a proxy record of upwelling intensity from the Arabian Sea suggest an abrupt increase in the monsoon winds. On the basis of these observations, we hypothesize that the frequency distribution of active-break periods varies on centennial timescales, implying a leading role of internal dynamics in governing the ISM response to slowly-evolving changes in the external boundary conditions. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-cave-11937 HTTPS Landing Page NCEI landing page for this dataset Dataset landing page with general information and links to access the data. information https://www.ncdc.noaa.gov/paleo/study/11937 HTTPS Web Browser NCEI Study Page Study page with dataset access information. search https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/speleothem HTTPS Information NCEI Cave Page General information for this data type. information https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/india/jhumar-wah-shikar2011.txt HTTPS Download /speleothem/asia/india/jhumar-wah-shikar2011.txt Speleothem download https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/india/jhumar-wah-shikar2011.xls HTTPS Download /speleothem/asia/india/jhumar-wah-shikar2011.xls Speleothem download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25