NOAA/WDS Paleoclimatology - Sugan Lake, NW China 1000 Year Chironomid Salinity Reconstruction
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title: NOAA/WDS Paleoclimatology - Sugan Lake, NW China 1000 Year Chironomid Salinity Reconstruction
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date: 2012-03-09
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Anchor: DOI doi:10.25921/5xz4-w563
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abstract: 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 Climate Reconstruction. The data include parameters of climate reconstructions|insect|paleolimnology with a geographic location of China, Eastern Asia. The time period coverage is from 960 to -52 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
purpose: Records of past temperature, precipitation, and other climate variables derived from paleoclimate proxies. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations.
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keyword: Earth Science > Climate Indicators > Paleoclimate Indicators > Paleoclimate Reconstructions
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keyword: earth science > paleoclimate > climate reconstructions|insect|paleolimnology
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keyword: earth science > paleoclimate > climate reconstructions|insect|paleolimnology
keyword: earth science > paleoclimate > reconstructions > lake salinity
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keyword: What: salinity; Material: lake water|midge assemblage
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keyword: Continent > Asia > Eastern Asia > China > Sugan Lake > LATITUDE 38.8667 > LONGITUDE 93.8833
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otherConstraints: Cite as: Chen, J.; Chen, F.; Zhang, E.L.; Brooks, S.J.; Zhou, A.F.; Zhang, J.-W. (2012-03-09): NOAA/WDS Paleoclimatology - Sugan Lake, NW China 1000 Year Chironomid Salinity Reconstruction. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/5xz4-w563. Accessed [date].
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otherConstraints: 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.
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otherConstraints: 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.
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title: A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Basin, arid Northwest China, and its palaeoclimatic significance
date: (CI_Date)
date: 2009
dateType: (CI_DateTypeCode) publication
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individualName: Chen, J.H., F.H. Chen, E.L. Zhang, S.J. Brooks, A.F. Zhou, and J.W. Zhang
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description: Chen, J.H., F.H. Chen, E.L. Zhang, S.J. Brooks, A.F. Zhou, and J.W. Zhang, 2009: A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Basin, arid Northwest China, and its palaeoclimatic significance. Chinese Science Bulletin, 54, 3749-3759, 10.1007/s11434-009-0201-8
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description: Date Range: 990 CE to 2002 CE; Date Range: 960 cal yr BP to -52 cal yr BP;
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westBoundLongitude: 93.8833
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supplementalInformation: STUDY NOTES: Chironomid-inferred water salinity data from Sugan Lake, Qaidam Basin, NW China, for the last millennium. Salinity was estimated using a chironomid-salinity transfer function for Tibetan Plateau lakes developed by Zhang et al (2007). The salinity record was standardized to have a zero mean and unit standard deviation. Chronology was established by varve counting (Zhou et al., 2007, 2009). ABSTRACT SUPPLIED BY ORIGINATOR: A 1000-year high-resolution (~10 years) chironomid record from varved sediments of Sugan Lake, Qaidam Basin on the northern Tibetan Plateau, is presented. The chironomid assemblages are mainly composed of the relatively high-saline-water taxa Psectrocladius barbimanus-type and Orthocladius/ Cricotopus, and the relatively low-saline-water taxa Procladius and Psectrocladius sordidellus-type. Variations in the chironomid fauna and inferred salinities suggest that over the last millennium, the Sugan Lake catchment has alternated between contrasting climatic conditions, having a dry climate during the period 990-1550 AD, a relatively humid climate during the Little Ice Age (LIA) (1550-1840 AD), and a dry climate again from 1840 AD onwards. At the decadal to centennial scale, a wet event around 1200-1230 AD, interrupting the generally arid period (990-1550 AD), and a dry event around 1590-1700 AD, punctuating the generally humid period (1550-1840 AD), are clearly documented. Trends in the chironomid-based salinity time series indicate a highly unstable climate during the LIA when salinity fluctuations were of greater magnitude and higher frequency. The effective moisture evolution in the Sugan Lake catchment during the last millennium reconstructed by chironomid analysis is in broad agreement with previous palaeo-moisture data derived from other sites in arid Northwest China (ANC). The LIA, characterized by generally humid conditions over the westerly-dominated ANC was distinctly different from that in monsoonal China, implying an "out-of-phase" relationship between moisture evolution in these two regions during the past 1000 years.
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