globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2012.12.006
Scopus记录号: 2-s2.0-84878921228
论文题名:
Reconstruction of palaeoprecipitation based on pollen transfer functions - the record of the last 16ka from Laguna Potrok Aike, southern Patagonia
作者: Schäbitz F.; Wille M.; Francois J.-P.; Haberzettl T.; Quintana F.; Mayr C.; Lücke A.; Ohlendorf C.; Mancini V.; Paez M.M.; Prieto A.R.; Zolitschka B.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 71
起始页码: 175
结束页码: 190
语种: 英语
英文关键词: ICDP-project PASADO ; Late Quaternary ; Modern pollen samples ; Palaeoclimate ; Pollen ; Precipitation reconstruction ; Southern Hemisphere Westerlies ; Transfer function
Scopus关键词: ICDP-project PASADO ; Late quaternary ; Modern pollen samples ; Palaeoclimate ; Pollen ; Precipitation reconstruction ; Southern Hemisphere ; Moisture ; Statistical methods ; Transfer functions ; Lasers ; carbonate ; concentration (composition) ; environmental factor ; Holocene ; numerical model ; pollen ; precipitation (climatology) ; reconstruction ; Southern Hemisphere ; temperature effect ; Argentina ; Laguna Potrok Aike ; Patagonia ; Santa Cruz [Argentina]
英文摘要: Based on modern pollen samples from different vegetation units in southern Patagonia, showing a close relation to yearly amounts of precipitation and mean annual temperatures, different pollen-climate transfer functions are developed and tested. Comparing the performance of MAT (Modern Analogue Techniques), WA (Weighted Average), as well as WAPLS (Weighted Average Partial Least Square) statistical techniques, it is possible to determine the statistically most robust model (WAPLS for precipitation). This transfer function is then used to estimate palaeoprecipitation amounts based on Laguna Potrok Aike pollen results for the last 16,000 years. Generally, the results of the precipitation model indicate less precipitation during the Lateglacial and alternating wet and dry periods during the Holocene. The Holocene started with higher amounts of precipitation until about 8kacal.BP, followed by a period with lower amounts between 8 and 2.5kacal.BP, while the Late Holocene shows a general increase in precipitation. Comparisons with former shoreline reconstructions and carbonate concentrations in the sediments of Laguna Potrok Aike not always show similarities due to the complex environmental factors recorded by these proxies. Moreover, changes in the moisture availability due to the interplay of precipitation and temperature, cannot be reconstructed directly. Nevertheless, the general long-term trend of palaeoprecipitation is in accordance with the absolute moisture content in the air, which is determined mainly by temperature: during cold periods with less absolute moisture, the model shows less precipitation. Moreover, the model also points to a relation with the position and strength of the Southern Hemisphere Westerlies. © 2013 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60620
Appears in Collections:过去全球变化的重建

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作者单位: Seminar für Geographie und ihre Didaktik, University of Cologne, Gronewaldstr. 2, D-50931 Cologne, Germany; Physical Geography, Institute of Geography, University of Jena, Löbdergraben 32, D-07743 Jena, Germany; Centro Regional Universitario Bariloche, Instituto de Investigaciones en Biodiversidad y Medioambiente, San Carlos de Bariloche, Argentina; Institute of Geography, University of Erlangen-Nuremberg, Kochstr. 4/4, D-91054 Erlangen, Germany; Institute of Paleontology and Geobiology, University of Munich, Richard-Wagner-Str. 10, D-80333 Munich, Germany; Institute of Bio- and Geosciences, Research Center Jülich, IBG-3: Agrosphere, D-52425 Jülich, Germany; GEOPOLAR, Institute of Geography, University of Bremen, Celsiusstr. FVG-M, D-28359 Bremen, Germany; Laboratorio de Palinología, Universidad Nacional de Mar del Plata, Funes 3254, 7600 Mar del Plata, Argentina

Recommended Citation:
Schäbitz F.,Wille M.,Francois J.-P.,et al. Reconstruction of palaeoprecipitation based on pollen transfer functions - the record of the last 16ka from Laguna Potrok Aike, southern Patagonia[J]. Quaternary Science Reviews,2013-01-01,71
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