NOAA/WDS Paleoclimatology - Lago dell'Accesa Italy 11.7-4.6KYr Pollen Climate Reconstructions
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title: NOAA/WDS Paleoclimatology - Lago dell'Accesa Italy 11.7-4.6KYr Pollen Climate Reconstructions
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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|pollen with a geographic location of Italy, Southern Europe. The time period coverage is from 11500 to 4530 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|pollen
keyword: earth science > paleoclimate > climate reconstructions|pollen
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keyword: Continent > Europe > Southern Europe > Italy > Lago dell'Accesa > LATITUDE 42.9888 > LONGITUDE 10.8972
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otherConstraints: Cite as: Finsinger, W.; Colombaroli, D.; de Beaulieu, J.-L.; Valsecchi, V.; Vannière, B.; Vescovi, E.; Chapron, E.; Lotter, A.F.; Magny, M.; Tinner, W. (2010-09-27): NOAA/WDS Paleoclimatology - Lago dell'Accesa Italy 11.7-4.6KYr Pollen Climate Reconstructions. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/nvsj-k131. 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: 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.
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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: Early to mid-Holocene climate change at Lago dell'Accesa (central Italy): climate signal or anthropogenic bias?
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organisationName: Journal of Quaternary Science
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description: Date Range: 11500 cal yr BP to 4530 cal yr BP;
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supplementalInformation: STUDY NOTES: Pollen-inferred summer precipitation and January temperature for Lago dell'Accesa, central Italy. ABSTRACT SUPPLIED BY ORIGINATOR: Despite the high potential of pollen records for climate reconstruction, pollen-climate relationships may be biased due to past and present human activities on the landscape. We use (i) transfer functions based on modern pollen-climate relationships to infer seasonal temperature and summer precipitation for the period 11 500-4500 cal. a BP and (ii) lake-level change records based on different sedimentary proxies in multiple cores that are mainly indicative for summer hydrology at Lago dell'Accesa (central Italy). Quantitative reconstructions indicate lowest summer precipitation during two phases (8500-7700 cal. a BP and after 6000 cal. a BP) and a gradual winter temperature increase from 11 500 to ca. 8000 cal. a BP. Lowest summer precipitation was reconstructed during these phases characterised by vegetation shifts from open forests dominated by summergreen oaks (Quercus) to forests dominated by evergreen oaks (Quercus ilex), which are at present most abundant where summer drought is stronger. Similarly, the lake-level record indicates two long-lasting low summer precipitation phases (8800-7700 and 6400-4400 cal. a BP) that were interrupted by short-term high summer precipitation events. Based on the broad agreement between the pollen-inferred summer precipitation and the low-frequency lake-level changes, we suggest that the duration of the high summer precipitation events may have been too short to maintain drought-sensitive trees, which may have been affected by high mortality rates when summer dry conditions returned. Although past and modern pollen-climate relationships may very likely have been affected by human activities since the Neolithic (i.e. when exploitation of the landscape started), we reject the hypothesis of a significant anthropogenic bias in the pollen-based climate reconstruction. In addition, we suggest that pollen-based and lake-level reconstructions may have different inherent abilities of capturing high- and low-frequency precipitation signals.
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