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Author

Jan-Pieter Buylaert

Other affiliations: Ghent University, Aarhus University
Bio: Jan-Pieter Buylaert is an academic researcher from Technical University of Denmark. The author has contributed to research in topics: Thermoluminescence dating & Loess. The author has an hindex of 41, co-authored 145 publications receiving 5520 citations. Previous affiliations of Jan-Pieter Buylaert include Ghent University & Aarhus University.


Papers
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Journal ArticleDOI
01 Jul 2012-Boreas
TL;DR: In this paper, the authors proposed a post-IR IRSL (IRSL) method for the dating of Middle and Late Pleistocene sediments, which appears to avoid signal instability.
Abstract: Luminescence dating is used extensively to provide absolute chronologies for Late Pleistocene sediments. Nowadays, most optical dates are based on quartz optically stimulated luminescence (OSL). However, the application of this signal is usually limited to the last ∼100 ka because of saturation of the quartz luminescence signal with dose. In contrast, the feldspar infrared stimulated luminescence (IRSL) dose–response curve grows to much higher doses; this has the potential to extend the datable age range by a factor of 4–5 compared with quartz OSL. However, it has been known for several decades that this IRSL signal is unstable, and this instability often gives rise to significant age underestimation. Here we test against independent age control the recently developed feldspar post-IR IRSL approach to the dating of sediments, which appears to avoid signal instability. A physical model explaining our observations is discussed, and the method is shown to be accurate back to 600 ka. The post-IR IRSL signal is reduced by exposure to daylight more slowly than that from quartz and low-temperature IRSL, preventing its general application to young (e.g. Holocene) sediments. Nevertheless, this new approach is widely applicable (feldspar of appropriate luminescence behaviour is even more ubiquitous than quartz). These characteristics make this a method of great importance for the dating of Middle and Late Pleistocene deposits.

573 citations

Journal ArticleDOI
TL;DR: Thomsen et al. as mentioned in this paper proposed a post-IR IR dating protocol on K-feldspar extracts from a variety of locations and depositional environments and compare the results with those from the conventional IR at 50°C protocol.

521 citations

Journal ArticleDOI
TL;DR: In this paper, a post-IR IR stimulated luminescence (IRSL) dating protocol was applied to polymineral fine-grain samples of the loess/palaeosol sequence in Stratzing, Lower Austria.

515 citations

Journal ArticleDOI
TL;DR: In this article, the difference in relative bleaching rates of quartz optically stimulated luminescence (OSL) and feldspar residual signals after natural bleaching prior to deposition was investigated for identifying well-bleached quartz samples.

231 citations

Journal ArticleDOI
TL;DR: In this article, the authors applied instrumental neutron activation analysis (INAA) to determine the U and Th concentrations in quartz fractions extracted from three covers and samples from the southern Netherlands.

190 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors synthesize palaeoclimate records from the mid-latitude arid Asian region dominated today by the Westerlies ("arid central Asia" (ACA)) to evaluate spatial and temporal patterns of moisture changes during the Holocene.

947 citations

Journal ArticleDOI
01 Jan 2016-Boreas
TL;DR: In this paper, the authors present a new time-slice reconstruction of the Eurasian ice sheets (British-Irish, Svalbard-Barents-Kara Seas and Scandinavian) documenting the spatial evolution of these interconnected ice sheets every 1000 years from 25 to 10 years and at four selected time periods back to 40 years.
Abstract: We present a new time-slice reconstruction of the Eurasian ice sheets (British–Irish, Svalbard–Barents–Kara Seas and Scandinavian) documenting the spatial evolution of these interconnected ice sheets every 1000 years from 25 to 10 ka, and at four selected time periods back to 40 ka. The time-slice maps of ice-sheet extent are based on a new Geographical Information System (GIS) database, where we have collected published numerical dates constraining the timing of ice-sheet advance and retreat, and additionally geomorphological and geological evidence contained within the existing literature. We integrate all uncertainty estimates into three ice-margin lines for each time-slice; a most-credible line, derived from our assessment of all available evidence, with bounding maximum and minimum limits allowed by existing data. This approach was motivated by the demands of glaciological, isostatic and climate modelling and to clearly display limitations in knowledge. The timing of advance and retreat were both remarkably spatially variable across the ice-sheet area. According to our compilation the westernmost limit along the British–Irish and Norwegian continental shelf was reached up to 7000 years earlier (at c. 27–26 ka) than the eastern limit on the Russian Plain (at c. 20–19 ka). The Eurasian ice sheet complex as a whole attained its maximum extent (5.5 Mkm2) and volume (~24 m Sea Level Equivalent) at c. 21 ka. Our continental-scale approach highlights instances of conflicting evidence and gaps in the ice-sheet chronology where uncertainties remain large and should be a focus for future research. Largest uncertainties coincide with locations presently below sea level and where contradicting evidence exists. This first version of the database and time-slices (DATED-1) has a census date of 1 January 2013 and both are available to download via the Bjerknes Climate Data Centre and PANGAEA (www.bcdc.no; http://doi.pangaea.de/10.1594/PANGAEA.848117).

757 citations

Journal ArticleDOI
TL;DR: In this article, the authors determined fading rates for various sedimentary feldspar samples using different stimulation and detection windows, and found that the initial and final parts of the OSL signal bleach at approximately the same rate.

641 citations

Journal ArticleDOI
TL;DR: In this article, the authors present a synthesis of the literature on the 32 biggest rivers in the world and propose a governance framework to monitor these rivers, finance their continual upkeep and help ameliorate increasing anthropogenic pressures, including large-scale damming, hydrological change, pollution, introduction of non-native species and sediment mining.
Abstract: The world’s big rivers and their floodplains were central to development of civilization and are now home to c. 2.7 billion people. They are economically vital whilst also constituting some of the most diverse habitats on Earth. However, a number of anthropogenic stressors, including large-scale damming, hydrological change, pollution, introduction of non-native species and sediment mining, challenge their integrity and future, as never before. The rapidity and extent of such change is so great that large-scale, and potentially irreparable, transformations may ensue in periods of years to decades, with ecosystem collapse being possible in some big rivers. Prioritizing the fate of the world’s great river corridors on an international political stage is imperative. Future sustainable management, and establishment of environmental flow requirements for the world’s big rivers, must be supported through co-ordinated international funding, and trans-continental political agreement to monitor these rivers, finance their continual upkeep and help ameliorate increasing anthropogenic pressures. To have any effect, all of these must be set within an inclusive governance framework across scales, organizations and local populace. Stressors such as large-scale damming, hydrological change, pollution, the introduction of non-native species and sediment mining are challenging the integrity and future of large rivers, according to a synthesis of the literature on the 32 biggest rivers.

598 citations

Journal ArticleDOI
01 Jul 2012-Boreas
TL;DR: In this paper, the authors proposed a post-IR IRSL (IRSL) method for the dating of Middle and Late Pleistocene sediments, which appears to avoid signal instability.
Abstract: Luminescence dating is used extensively to provide absolute chronologies for Late Pleistocene sediments. Nowadays, most optical dates are based on quartz optically stimulated luminescence (OSL). However, the application of this signal is usually limited to the last ∼100 ka because of saturation of the quartz luminescence signal with dose. In contrast, the feldspar infrared stimulated luminescence (IRSL) dose–response curve grows to much higher doses; this has the potential to extend the datable age range by a factor of 4–5 compared with quartz OSL. However, it has been known for several decades that this IRSL signal is unstable, and this instability often gives rise to significant age underestimation. Here we test against independent age control the recently developed feldspar post-IR IRSL approach to the dating of sediments, which appears to avoid signal instability. A physical model explaining our observations is discussed, and the method is shown to be accurate back to 600 ka. The post-IR IRSL signal is reduced by exposure to daylight more slowly than that from quartz and low-temperature IRSL, preventing its general application to young (e.g. Holocene) sediments. Nevertheless, this new approach is widely applicable (feldspar of appropriate luminescence behaviour is even more ubiquitous than quartz). These characteristics make this a method of great importance for the dating of Middle and Late Pleistocene deposits.

573 citations