Jesper Olsen
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View article: Quantifying uncertainty in stratigraphic alignment of geological signals using probabilistic dynamic time warping
Quantifying uncertainty in stratigraphic alignment of geological signals using probabilistic dynamic time warping Open
Aligning stratigraphic records is essential for constructing unified and coherent chronological frameworks for Earth's history and advancing our understanding of past environments and geological processes. However, the alignment process is…
View article: A late Pleistocene glacial maximum during MIS 3 in the Chersky Mountains, central northeast Siberia
A late Pleistocene glacial maximum during MIS 3 in the Chersky Mountains, central northeast Siberia Open
The glacial history of northeast Siberia is poorly understood compared with other high-latitude regions. Using 10 Be and 26 Al exposure dating together with remote sensing, we have investigated the glacial history of a remote, formerly gla…
View article: Multi‐million‐year evolution of the Greenland Ice Sheet in Inglefield Land, North Greenland
Multi‐million‐year evolution of the Greenland Ice Sheet in Inglefield Land, North Greenland Open
Information on past sensitivity of the Greenland Ice Sheet to climate change is of importance for optimizing models simulating the future evolution of ice mass loss. While the ice‐sheet change during the Lateglacial and Holocene is relativ…
View article: Unraveling burial histories with CosmoChron
Unraveling burial histories with CosmoChron Open
Cosmogenic nuclides measured in depth-profiles are a valuable tool for reconstructing the depositional and erosional history of sedimentary sequences. The burial ages of these sequences can be determined by measuring cosmogenic nuclide pai…
View article: An advance of the Eurasian Ice Sheet to the Central European Uplands preceded MIS
An advance of the Eurasian Ice Sheet to the Central European Uplands preceded MIS Open
Records of ice-rafted detritus (IRD) from the global oceans indicate the expansion of large Northern Hemisphere ice sheets prior to the Plio–Pleistocene transition. Yet, the geometry of these early ice sheets remains unclear due to l…
View article: Paleolithic occupations in the Lahn Valley of Central Germany: New dating and ZooMS results from Wildscheuer, Wildweiberlei, and Wildhaus
Paleolithic occupations in the Lahn Valley of Central Germany: New dating and ZooMS results from Wildscheuer, Wildweiberlei, and Wildhaus Open
There is limited evidence of repeated occupations by Neanderthals or modern humans in the part of Central Germany that roughly corresponds to the present-day Federal State of Hesse. The Lahn Valley located in the southwestern sector of thi…
View article: Increased aeolian activity linked to Neoglacial cooling and glacier advance in southern Greenland
Increased aeolian activity linked to Neoglacial cooling and glacier advance in southern Greenland Open
Wind activity is a powerful force that shapes the landscapes of deserts, coastal areas, and regions adjacent to ice sheets, and it has significant implications for human settlement. In southern Greenland, it has been proposed that the incr…
View article: A radiocarbon bomb pulse model for estimating the age of North Atlantic cetaceans
A radiocarbon bomb pulse model for estimating the age of North Atlantic cetaceans Open
The tusk of the male narwhal is a prolonged canine tooth, reaching a size of up to 3 m in length. The tusk erupts through the young narwhal’s upper left lip and, over time, develops into an elongated structure composed of dentine growth la…
View article: The Greenland shark (Somniosus microcephalus) genome provides insights into extreme longevity
The Greenland shark (Somniosus microcephalus) genome provides insights into extreme longevity Open
The Greenland shark (Somniosus microcephalus) is the longest-lived vertebrate known, with an estimated lifespan of ~ 400 years. Here, we present a chromosome-level assembly of the 6.45 Gb Greenland shark, rendering it one of the largest no…
View article: Increased C4 cultivation and consumption as an impetus for population growth at Badia Pozzeveri, Italy (11th–13th centuries CE)
Increased C4 cultivation and consumption as an impetus for population growth at Badia Pozzeveri, Italy (11th–13th centuries CE) Open
The focus of this study is to target the paucity of bioarchaeological information related to the population growth that characterized the Late Middle Ages in Italy. Specifically, we used stable isotope analysis to investigate the potential…
View article: Two millennia of climate change, wildfires, and caribou hunting in west Greenland
Two millennia of climate change, wildfires, and caribou hunting in west Greenland Open
Changing climatic conditions is a perpetual circumstance for mankind. In this study, we investigate local environmental and climatic changes near Kangerlussuaq, west Greenland. Our reconstruction is based on a lake sediment core and method…
View article: Early Pleistocene onset of glacial incision in the Baltic Basin revealed by 10Be-26Al burial dating of the Hattem Beds
Early Pleistocene onset of glacial incision in the Baltic Basin revealed by 10Be-26Al burial dating of the Hattem Beds Open
In Northwest Europe, the earliest presence of the Fennoscandian Ice Sheet (FIS) is registered in the Dutch-German border region, where fluvio-deltaic sediments of the ancient Eridanos river system contain weathered Nordic erratics within t…
View article: Redrawing early human dispersal patterns with cosmogenic nuclides 
Redrawing early human dispersal patterns with cosmogenic nuclides  Open
Burial dating with two cosmogenic nuclides (e.g. 26Al and 10Be) is unveiling the last 5 million years of the sedimentary record. There is no dating method of comparable reliability for the fragmentary records typical of terrestrial setting…
View article: Unveiling the early Eurasian glaciations with new advances of 10Be-26Al burial dating
Unveiling the early Eurasian glaciations with new advances of 10Be-26Al burial dating Open
Cosmogenic nuclide burial dating exploits the differential decay rate of a nuclide pair, typically 26Al and 10Be. There are three basic approaches; simple burial dating, the isochron method and P-PINI (Particle Pathway Inversion of Nuclide…
View article: Isotopic and historical evidence of regional stockfish trade in the Skagerrak during the 16th century
Isotopic and historical evidence of regional stockfish trade in the Skagerrak during the 16th century Open
Preserved fish was one of the main traded commodities in medieval and early modern times, and herring and cod were the socioeconomically most important species. This paper brings together stable isotope ratio analysis of archaeological cod…
View article: Middle Neolithic trackway A20 at Kastbjerg Å
Middle Neolithic trackway A20 at Kastbjerg Å Open
In 2015-2017, East Jutland Museum excavated a series of well-preserved prehistoric and early historic trackways at Kastbjerg Å in the Kastbjerg Å river valley (eastern Jutland, Denmark). In this article, we will present the earliest of the…
View article: Deglaciation of the highest mountains in Scandinavia at the Younger Dryas–Holocene transition: evidence from surface exposure‐age dating of ice‐marginal moraines
Deglaciation of the highest mountains in Scandinavia at the Younger Dryas–Holocene transition: evidence from surface exposure‐age dating of ice‐marginal moraines Open
Surface exposure–age dating was applied to rock surfaces associated with ice‐marginal moraines at elevations of ~1520–1780 m a.s.l. on the slopes of Galdhøpiggen and Glittertinden, the two highest mountains in Scandinavia located in the Jo…
View article: Comment on gchron-2023-7
Comment on gchron-2023-7 Open
Abstract. Knowledge of the marine reservoir age is fundamental for creating reliable chronologies of marine sediment archives based on radiocarbon dating. This age difference between the 14C age of a marine sample and that of its contempor…
View article: COMPARING METHODS FOR CO<sub>2</sub>PURIFICATION OF CREMATED BONE SAMPLES
COMPARING METHODS FOR CO<sub>2</sub>PURIFICATION OF CREMATED BONE SAMPLES Open
During the last two decades the radiocarbon ( 14 C) dating of hydroxyapatite archaeological cremated bones has become standard practice. Various pretreatment procedures exist among different laboratories of which some include fixation of S…
View article: Absence of Large‐Scale Ice Masses in Central Northeast Siberia During the Late Pleistocene
Absence of Large‐Scale Ice Masses in Central Northeast Siberia During the Late Pleistocene Open
Ongoing speculation regarding the existence of large Late Pleistocene ice masses in Northeast Eurasia reflects the dearth of age constraints on glaciations across this vast region. Here, we report the first dates from the central part of N…
View article: The marine reservoir age of Greenland coastal waters
The marine reservoir age of Greenland coastal waters Open
Knowledge of the marine reservoir age is fundamental for creating reliable chronologies of marine sediment archives based on radiocarbon dating. This age difference between the 14C age of a marine sample and that of its contemporaneous atm…
View article: East Siberian glaciers have contracted over the last two glacial cycles
East Siberian glaciers have contracted over the last two glacial cycles Open
Satellite-based maps of glacial landforms reveal that the mountain landscapes of northeast Eurasia contain over one million km2 of glaciated terrain. Previous work has speculated on the existence of large ice masses during the Last Glacial…
View article: Drought Attribution Studies and Water Resources Management
Drought Attribution Studies and Water Resources Management Open
Attribution studies can provide insights into changing drought processes that can inform planning for future water supply, reservoir allocation decisions, and drought triggers.