Jesper Olsen
Dados Biográficos
| ID | 75167 |
|---|---|
| NOME | Jesper Olsen |
| PRENOMES | Jesper |
| SOBRENOME | Olsen |
| ASSINATURA | OLSEN J |
| AFILIAÇÕES | Aarhus University |
| ORCID | 0000-0002-4445-5520 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 133 |
| TOTAL DE CITAÇÕES | 1623 |
| TOTAL COMO AUTOR | 133 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1981 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2026 |
| ÍNDICE H | 10 |
Land Tenure and Resilience in Early Iron Age northern Denmark investigated using high-definition dating
The Early Iron Age in southern Scandinavia is often seen as a period of landscape degradation and unsustainable economic practices: Celtic fields expand and the open land with heath and grass pasture reaches a peak, sometimes with episodes of sand drift. However, past land tenure may have been more resilient than such conceptualisations imply. At Aalborg Barracks, northern Jutland, Denmark, an Early Iron Age landscape with Celtic fields, a fence,…
Diet during the Reformation in Nya Lödöse (1473–1624)
This study employs an interdisciplinary approach to investigate diet at the Swedish town of Nya Lödöse (1473–1624 CE). The primary aim is to determine the proportions of aquatic and terrestrial foods consumed in the diet and to examine whether these proportions shifted after the Reformation in 1527. A secondary aim is to analyze variations in diet related to biological sex or social status. δ 13 C and δ 15 N stable isotope ratio analysis of bulk …
Forests, pastures, and furnaces in the south-eastern Alps
Drawing on the Lake Caldonazzo sedimentary record (Valsugana, Italy), this study reconstructs palaeoecological dynamics from the 6th to 1st millennium BCE, revealing the environmental imprint of pre-protohistoric copper mining in the south-eastern Alps. Integrating bio- and geochemical proxies (micro-botanical data, micro-charcoal, faecal biomarkers, and trace elements) we reconstruct the interplay between environmental dynamics and anthropogenic…
A comprehensive exposure-age dating approach to interpreting complex glacial and periglacial landscapes
Our aim was to use two exposure dating techniques in combination to understand the age and development of the full complement of glacial and periglacial landforms in the Alnesdalen drainage basin, southern Norway. This required the development of a comprehensive, landscape-scale approach based on 32 10 Be dates from 9 landforms and 121 Schmidt-hammer dates from 106 landforms, which identified a palimpsest landscape consisting of a mosaic of landf…
A late Pleistocene glacial maximum during MIS 3 in the Chersky Mountains, central northeast Siberia
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 glaciated valley in the Tas-Kystabyt Range of the Chersky Mountains in central northeast Siberia. Based on measurements from moraine boulders and bedrock samples, we find evidence for deglaciation of the valley 45.…
Wood exploitation in northern Europe during the Early Neolithic
Paleolithic occupations in the Lahn Valley of Central Germany
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 this region is an exception. Based on early excavations of a series of now destroyed sites, the Lahn Valley has yielded sparse evidence of Neanderthal occupation from the Middle Paleolithic and has produced a more …
Increased C4 cultivation and consumption as an impetus for population growth at Badia Pozzeveri, Italy (11th–13th centuries CE)
The diet of the people buried at Badia Pozzeveri was mainly a mix of C 3 and C 4 terrestrial resources. • 15 of the analysed individuals experienced dietary changes over their lives. • Late Medieval diets in northwest Tuscany were characterized by increased millet consumption. • The gradual shift to millet consumption was likely due to population growth. The focus of this study is to target the paucity of bioarchaeological information related to …
Isotopic and historical evidence of regional stockfish trade in the Skagerrak during the 16th century
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 bones and documentary data from customs records originating from the early modern Swedish town of Nya Lödöse (1473–1624 CE), shedding new light on the import of stockfish (dried cod). The combined results show …
Two millennia of climate change, wildfires, and caribou hunting in west Greenland
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 methods include chemical proxies and a palynological analysis. The investigated site is located 15 km from the Aasivissuit Inuit summer hunting ground, which has been in use for caribou hunting for more than 2000 year…
It was a dog's breakfast! A radiocarbon and isotope‐based study of dogs exploring dietary change during the Mesolithic–Neolithic transition in Denmark
This paper examines newly acquired and previously published carbon and nitrogen isotope values in bone collagen from 58 dogs ( Canis familiaris ) dated to the Mesolithic–Neolithic transition. Using the Bayesian mixing model FRUITS, we estimate the marine or freshwater dietary fractions. These estimates, together with a radiocarbon‐based Bayesian statistical model, have allowed us to calculate the freshwater reservoir age for selected Danish regio…
Fuel use in medieval iron production in central Jutland, Denmark
Banatian DeathMetals
The lack of radiocarbon measurements of funerary contexts is a major shortcoming of the Late Bronze Age and Early Iron Age of the Eastern Carpathian Basin, especially in the Banat region. The present batch of samples tries to address these drawbacks, by detailing sampling strategies, employed pre-treatment and by providing a robust and coherent dataset of radiocarbon measurements. Implications of the new radiocarbon dates is discussed from a supr…
Túrkeve-Terehalom in the Eastern Carpathian Basin. Bronze Age multi-stratified site provides high-precision chronology with continental implications
The multi-stratified site of Túrkeve-Terehalom presents an exceptional opportunity to establish the start and the end of the Middle Bronze Age in the Eastern Carpathian Basin and to refine its inner chronology. The chronological potential of the site rests on the meticulous excavation campaigns over a decade. This potential has been harvested by linking stratified finds, particularly pottery, to narrow, calibrated age-ranges. The result has impli…
Comparing Methods for Co 2 Purification of Cremated Bone Samples
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 SO 2 using “Sulfix” prior to CO 2 reduction. Recently it was reported that the use of Sulfix may cause the resulting 14 C age to be too old. Here we report on the use Sulfix at the Aarhus AMS Centre. Further, we …
Ramped pyrolysis radiocarbon dating of lime lumps
Ramped pyrolysis radiocarbon dating was carried out on lime lumps from what was believed to be the oldest remains of Turku Cathedral, Finland, the first sacristy. Lumps extracted from bulk mortar from five sampling locations were analysed. For each sample, 5–6 fractions of CO2 from different temperature fractions were radiocarbon dated. One of the five samples exhibited significant contamination for its lowest temperature fractions. For the remai…
Radiocarbon dating of lime plaster from a Roman period cistern in ancient Gerasa, Jerash in Jordan
Ancient Gerasa (Jerash, since the Islamic period) is a city with a rich archaeological heritage from prehistory onwards, with the periods from Roman times into the Early Islamic period best attested. A Danish-German team has been working in the Northwest Quarter of the city since 2011. Among the findings was a Roman period monumental cistern that was intentionally filled in, at one point in time. The complexity of the archaeology raised chronolog…
Targeted radiocarbon dating of animal bones from ritual wetland depositions in early Iron Age (Denmark)
The Chronology of Kilwa Kisiwani, AD 800–1500
Incorporating decadal climate variability information in the operation and design of water infrastructure
The high thermal and mechanical inertia of the oceans results in slow changes in sea surface temperatures (SSTs). Changes in SSTs, in turn, can impact atmospheric circulation including water vapor transport, precipitation, and temperatures throughout the world. The Pacific Decadal Oscillation (PDO), the tropical Atlantic SST gradient variability, and the West Pacific Warm Pool are patterns of natural climate variability that tend to persist over …
Revisiting radiocarbon dating of lime mortar and lime plaster from Jerash in Jordan
Ancient Gerasa (its Greco-Roman name)/Islamic Jerash (its later Arab name) is one of the most well-known pre-modern urban sites in northern Jordan, which flourished throughout antiquity and into the early Islamic period. Direct dating of mortar and plaster in Jerash is challenging due to the area’s abundance of geological carbonates that hamper the use of radiocarbon mortar methodologies as shown by previous attempts. Therefore, this study revisi…
Ramped pyroxidation
Leprosy in Medieval Denmark
Palaeolithic bone and antler artefacts from Lateglacial and Early Holocene Denmark
The Danish Palaeolithic began during the Lateglacial (approximately 12,350 calBC) and lasted for about four thousand years. Only a handful of sites and organic stray finds have been precisely dated. And it is primarily on these that a preliminary chronological framework has been built. Similarly, numerous hypotheses on palaeohistory, typology, and settlement patterns have been proposed. However, due to the preservation of sediments that allow the…
Late Palaeolithic Nørre Lyngby – a northern outpost close to the west coast of Europe
The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
Radiocarbon ( 14 C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14 C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth syste…
Coast–inland mobility and diet in the Danish Mesolithic and Neolithic
Marine20—The Marine Radiocarbon Age Calibration Curve (0–55,000 cal BP)
The concentration of radiocarbon ( 14 C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14 C in the marine environment therefore need a marine-specific calibration curve and cannot be calibrated directly against the atmospheric-based IntCal20 curve. This paper presents Marine20, an update to the internationally agreed marine radiocarbon age calibration curve that provides a non-polar global-aver…
Characterisation and blind testing of radiocarbon dating of cremated bone
Old wood’ effect in radiocarbon dating of prehistoric cremated bones
Dietary Habits and Freshwater Reservoir Effects in Bones from a Neolithic NE German Cemetery
Within a project on Stone Age sites of NE Germany, 26 burials from the Ostorf cemetery and some further Neolithic sites have been analyzed by more than 40 accelerator mass spectrometry (AMS) dates. We here present the results of stable isotope and radiocarbon measurements together with reference 14 C dates on grave goods from terrestrial animals such as tooth pendants found in 10 of the graves. Age differences between human individuals and their …
A field guide to mortar sampling for radiocarbon dating
Radiocarbon dating of mortars is a method for absolute dating of historical mortared stone structures. Successful mortar dating studies have answered chronological questions, while other studies have revealed that mortar samples can have complications and contaminants. These can cause inconclusive results even with present state‐of‐the‐art techniques. Previous research shows that adequate and proper sampling of mortar samples is of fundamental im…
Radiocarbon Analysis on the New Aarams 1MV Tandetron
We report here on the radiocarbon performance on the AARAMS HVE 1MV Tandetron. 14 C analysis is carried out in charge state 2+. We have avoided Li interference by appropriate settings of the high-energy electrostatic analyzer and the 30° second high-energy magnet. The 14 C machine background is determined using unprocessed graphite, which yielded 58,650±2032 14 C yr determined as the average and standard deviation of four measurements. Internatio…
Early Maglemosian culture in the Preboreal landscape
The transition from Late Palaeolithic to early Mesolithic cultures is strongly associated with the major environmental and climatic changes occurring with the shift from the Younger Dryas to the Holocene in northern Europe. In this paper, we present an interdisciplinary study combining archaeological and palaeoenvironmental research in an attempt to examine the relationship between environment and culture during this transition. Lundby Mose is a …
Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison
The radiocarbon ( 14 C) calibration curve so far contains annually resolved data only for a short period of time. With accelerator mass spectrometry (AMS) matching the precision of decay counting, it is now possible to efficiently produce large datasets of annual resolution for calibration purposes using small amounts of wood. The radiocarbon intercomparison on single-year tree-ring samples presented here is the first to investigate specifically …
Eight New Late Pleistocene/Early Holocene AMS Dates from the Southeastern Baltic
Only a limited number of radiometric dates for the Final Palaeolithic and the first half of the Mesolithic are available from the southeastern Baltic. This paper presents eight new Late Pleistocene/Early Holocene radiocarbon accelerator mass spectrometry ( 14 C AMS) ages of osseous artifacts housed at the Kaliningrad Regional Museum of History and Art. These artifacts include one piece of worked reindeer ( Rangifer tarandus ) antler, three axes o…
Chronology of the Danish Bronze Age Based on 14 C Dating of Cremated Bone Remains
The relative Bronze Age chronology for Scandinavia was established as early as 1885. It is traditionally divided into 6 periods (I–VI). Earlier attempts to make an absolute Bronze Age chronology for southern Scandinavia were derived from burials and settlements and were mainly based on radiocarbon-dated charcoal or carbonized cereals, often with undefined archaeological periods. Here, we present high-precision 14 C dating on burials with well-def…
Mid- to late-Holocene reservoir-age variability and isotope-based palaeoenvironmental reconstruction in the Limfjord, Denmark
Palaeoenvironmental and 14 C reservoir age variability in the Limfjord, a sound through northern Jutland, Denmark, was investigated for the period 7300 to 1300 cal yr BP. Shells and bulk sediment samples from a core from a former inlet, Kilen, were analysed by radiocarbon dating and stable isotope (C/N) measurements. A strong correlation between the C/N ratios and δ 13 C values verifies that these are good carbon source indicators and thus allow …
A New Annual 14 C Dataset for Calibrating the Thera Eruption
Annually resolved tree-ring samples of the time period 1625–1510 BCE were analyzed from the German oak tree-ring chronology. Blocks of the same tree rings were previously used to generate IntCal calibration data. The new dataset shows an offset to the calibration data IntCal13 of 24 years and resembles annual data for the same time period derived from tree-ring records in other growth locations. A subset of samples of the period 1625–1585 BCE was…
Dating the Trollesgave site and the Bromme culture – chronological fix-points for the Lateglacial settlement of Southern Scandinavia
The Bromme culture belongs to the Lateglacial, the period when people settled in the recently deglaciated Southern Scandinavia. Until now there have been only a few imprecise fix-points relating to the chronological position of this archaeological culture. This situation can now be improved with the aid of research results from a Bromme culture settlement at Trollesgave in SE Denmark. Using pollen and plant macrofossil data, Lateglacial lacustrin…
Freshwater Radiocarbon Reservoir Effects at the Burial Ground of Minino, Northwest Russia
If ancient carbon is incorporated into lakes and rivers, it can be transferred along the foodchain where it can cause radiocarbon dates to appear erroneously old. This effect is known as the 14 C freshwater reservoir effect (FRE), and causes particular problems when dating human remains. Several studies have attempted to use carbon and/or nitrogen stable isotopes to predict the size of the FRE, with mixed success. We have examined whether the FRE…
Ramped pyroxidation
Delayed Hardening and Reactivation of Binder Calcite, Common Problems in Radiocarbon Dating of Lime Mortars
When sampling mortars for radiocarbon ( 14 C) dating it is crucial to ensure that the sample has hardened rapidly relative the resolution of the dating method. Soft and porous lime mortars usually fulfill this criterion if the samples are taken from an uncovered surface from less than a few centimeters deep. However, hard, concrete-like mortars may be impermeable for carbon dioxide and even the outermost centimeters may still contain uncarbonated…
What Is the Carbon Origin of Early-Wood
Substantial amounts of annual radiocarbon ( 14 C) data have recently been produced with the purpose of increasing the time resolution of 14 C records used for constructing the calibration curve and for studying the occurrence of abrupt cosmic-ray events. In this study, we investigate if it is possible to resolve sub-annual scale changes in the atmospheric 14 C content by measuring radiocarbon in early-wood and late-wood fractions from Danish oak.…
Batch Processing of Tree-Ring Samples for Radiocarbon Analysis
We here present a comparison of methods for the pretreatment of a batch of tree rings for high-precision measurement of radiocarbon at the Aarhus AMS Centre (AARAMS), Aarhus University, Denmark. The aim was to develop an efficient and high-throughput method able to pretreat ca. 50 samples at a time. We tested two methods for extracting α-cellulose from wood to find the most optimal for our use. One method used acetic acid, the other used HCl acid…
Comparison of Thermal Decomposition and Sequential Dissolution—two Sample Preparation Methods for Radiocarbon Dating of Lime Mortars
Dating lime mortar samples using the radiocarbon ( 14 C) method can be difficult. This is because the contamination is similar to the primary dating material (CaCO 3 ) and consequently difficult to remove. Mortar can also have late-in-formation pyrogenic carbonate from interactions with the environment after the initial hardening phase, such as recrystallization, fire damage or delayed hardening. When 14 C dating a system of primary dating materi…
The history of seabird colonies and the North Water ecosystem
The North Water (NOW) polynya is one of the most productive marine areas of the Arctic and an important breeding area for millions of seabirds. There is, however, little information on the dynamics of the polynya or the bird populations over the long term. Here, we used sediment archives from a lake and peat deposits along the Greenland coast of the NOW polynya to track long-term patterns in the dynamics of the seabird populations. Radiocarbon da…
New data on agro-pastoral diets in southern Italy from the Neolithic to the Bronze Age
The socio-cultural and economic developments that took place from the Neolithic to the Bronze Age are poorly understood, despite the fact that they were essential for the establishment of fully agro-pastoral economies in Europe. In this study, we aim to assess dietary changes in communities living in southern Italy during this period by examining stable carbon and nitrogen isotope ratios on human bone collagen. In particular, we investigated skel…
Circumstantial evidence of non-pollen palynomorph palaeoecology
Late Holocene landscape development around a Roman Iron Age mass grave, Alken Enge, Denmark
Social selection in seeking medical care for reduced fecundity among women in Denmark
This study is based on a representative sample of 709 Danish women aged between 25 and 45 who were interviewed in 1979. The purpose was to estimate the proportion of women with reduced fecundity who seek medical care and to identify sociodemographic variables associated with presentation to the medical care system. The study showed that the majority of women with reduced fecundity did not seek medical care. The propensity to seek care was not sig…
Alcohol use, conception time, and birth weight
Predictors of birth weight and birth length were studied using sociodemographic data collected from 2259 women who resided in Funen County, Denmark, and delivered a healthy child during the period 1978-9 at Odense University Hospital. Low birth weight was significantly related to tobacco use in the year of delivery (p less than 0.01), alcohol use during the same period (p less than 0.05), and a delay in conception of over six months (p less than …
Occupational causes of laryngeal cancer
In a case-control study of all new cases of laryngeal cancer in Denmark from 1980 to 1982, 326 cases and 1134 community selected controls participated. Questionnaires were used to obtain information on education, occupation, and number of occupational exposures as well as smoking and drinking habits. High risk ratios for laryngeal cancer were found for semiskilled and unskilled workers, workers exposed to dust, out of doors workers, drivers, and …
Interaction of alcohol and tobacco as risk factors in cancer of the laryngeal region
The aim of this study is to present risk assessments for the combined effect of alcohol and tobacco in cancer of the larynx. The case control study included all newly diagnosed laryngeal cancer patients under the age of 75 in Denmark during the years 1980-2. Four age and sex matched controls were selected using the municipal person registry in which the case was listed. Ninety six per cent of all cases and 78% of controls participated in the stud…
Effect of combined alcohol and tobacco exposure on risk of cancer of the hypopharynx
The effect of moderate to heavy exposure to alcohol and tobacco on the risk of cancer of the hypopharynx is estimated in a case-control study. All incident hypopharyngeal cancer patients in Denmark who were under 75 years of age were compared with incident cases of laryngeal cancer and population sampled controls. The ascertainment of cases and controls took place during March 1980 to March 1982. Thirty-two patients with cancer of the hypopharynx…
Birth weight and gestational age among children of Danish pharmacy assistants
STUDY OBJECTIVE--The aim was to investigate whether specific types of work or exposures among pharmacy assistants were correlated with changes in birth weight or gestational age. DESIGN--The study was a nationwide historical cohort with open entry of all female members of the union of pharmacy assistants during 1979 to 1984. PARTICIPANTS--The cohort comprised 4939 pharmacy assistants under 40 years of age. The questionnaire was answered by 93%. M…
Does maternal tobacco smoking modify the effect of alcohol on fetal growth
Smoking and drinking habits were registered by a self-administered questionnaire in 36th week of gestation in 11,698 pregnant women, more than 80 percent of all such women in two Danish cities 1984-87. Alcohol consumption of 120 g/week or more was associated with a greater reduction in the average birthweight in the babies of smokers than of non-smokers (about 40 grams for the non-smokers and about 200 grams for the smokers). This is particularly…
Variability of self reported measures of alcohol consumption
STUDY OBJECTIVE--To describe the intra-subject variability of self reported maternal alcohol consumption using different ways of collecting information and to analyse the implications of this variability for research into the effect of low to moderate maternal alcohol consumption on birth weight. DESIGN--This was a longitudinal study. Self reported maternal alcohol consumption before, during, and after pregnancy was assessed on four occasions ove…
Options in making use of pregnancy history in planning and analysing studies of reproductive failure
BACKGROUND--Although more epidemiological studies of reproductive health have been published recently, important scientific achievements remain few. Among the reasons for this are existing methodological constraints. Fertility is low in most parts of the industralized world, making the observation time short. Pregnancy itself is under extremely close medical surveillance with intensive health care interventions such as prenatal screening, induced…
Socioeconomic and work related determinants of pregnancy outcome in southern Thailand
STUDY OBJECTIVE: To examine the effect of socioeconomic status on pregnancy outcome in an urbanised area in a rapidly developing country. METHODS: A cohort of 1797 pregnant women who attended antenatal care clinics at the two 700 bed hospitals in Hatyai city was recruited from September 1994 to November 1995. The pregnant women were followed up from the 17th week of gestation until delivery. The socioeconomic indicators selected were family socio…
Study of environmental, social, and paternal factors in preterm delivery using sibs and half sibs. A population-based study in Denmark
OBJECTIVE: The aim of this study was to evaluate the influence on preterm delivery of changes in putative genetic and environmental risk factors between two consecutive births. Low social status is a suspected risk indicator of preterm delivery, but the impact of social mobility has not been studied before. PARTICIPANTS: The study uses national cohorts in which women act as their own controls. Subjects were identified by means of registries: 10,4…
The PDS in Western Germany
Even though its leadership continues to insist that the PDS is a national party of the left, it is de facto an eastern German regional party. In the last several years, however, the PDS has found some measure of success at the local level in western Germany, where it now claims over 100 seats in local parliaments. Emboldened by this success, party leaders have suggested that the PDS-West is gradually 'putting down roots' in the old states of Germ…
What characterises a useful concept of causation in epidemiology
It has recently been suggested that epidemiologists should avoid thinking of causes in deterministic terms. This would mean giving up the component-cause model in its original form. A model that has provided important contributions as to how we develop hypotheses, design our study, analyse data, interpret and communicate our results. The component-cause model has considerably more to offer than a simple probabilistic concept. What a causal model …
A synchronized dating of three Greenland ice cores throughout the Holocene
As part of the effort to create the new Greenland Ice Core Chronology 2005 (GICC05) a synchronized stratigraphical timescale for the Holocene parts of the DYE‐3, Greenland Ice Core Project (GRIP), and North Greenland Ice Core Project (NGRIP) ice cores is made by using volcanic reference horizons in electrical conductivity measurements to match the cores. The main annual layer counting is carried out on the most suited records only, exploiting tha…
Characterisation and blind testing of radiocarbon dating of cremated bone
Coast–inland mobility and diet in the Danish Mesolithic and Neolithic
The composition of Mesolithic food
Integrating Continuous-Flow Mass Spectrometry and Automatic CO 2 Collection for AMS
Accelerator mass spectrometry (AMS) radiocarbon measurements of organic samples require combustion to obtain CO 2 for graphitization. Furthermore, determination of δ 13 C values is required in order to correct the 14 C age due to carbon isotope fractionation effects. δ 13 C analysis is commonly carried out by stable isotope mass spectrometry because most applications demand high-precision δ 13 C values in addition to the requirements of 14 C dati…
Multiproxy evidence for terrestrial and aquatic ecosystem responses during the 8.2 ka cold event as recorded at Højby Sø, Denmark
A sediment succession from Højby Sø, a lake in eastern Denmark, covering the time period 9400-7400 cal yr BP was studied using high-resolution geochemistry, magnetic susceptibility, pollen, macrofossil, diatom, and algal pigment analysis to investigate responses of the terrestrial and aquatic ecosystems to the 8.2 ka cold event. A reduced pollen production by thermophilous deciduous tree taxa in the period c. 8250–8000 cal yr BP reveal that the f…
Dietary Habits and Freshwater Reservoir Effects in Bones from a Neolithic NE German Cemetery
Within a project on Stone Age sites of NE Germany, 26 burials from the Ostorf cemetery and some further Neolithic sites have been analyzed by more than 40 accelerator mass spectrometry (AMS) dates. We here present the results of stable isotope and radiocarbon measurements together with reference 14 C dates on grave goods from terrestrial animals such as tooth pendants found in 10 of the graves. Age differences between human individuals and their …
Late-Holocene sea-surface conditions offshore Newfoundland based on dinoflagellate cysts
Dinoflagellate cysts and XRF core scanning data from two marine sediment cores from embayments north (Bonavista Bay) and south (Placentia Bay) of Newfoundland show significant changes in ocean and atmospheric conditions of the SW Labrador Sea region during the last 5700 years. Fresh and cold conditions, probably accompanied by seasonal sea ice, prevailed both north and south of Newfoundland from c. 5.7 to 4.0 cal. kyr BP. This may be linked to in…
Evidence of Suess solar-cycle bursts in subtropical Holocene speleothem δ 18 O records
Several studies indicate that changes in solar activity may have driven Holocene subtropical monsoon variability on decadal and centennial timescales, but the strength and nature of this link remains debated. In this study, we combine a recent mapping of the Holocene solar-cycle activity with four subtropical speleothem δ 18 O records, which allows a strong test of the link between solar activity, monsoon activity (or intensity), and the hydrolog…
P2-153 Prenatal stress following maternal bereavement during pregnancy and overweight in the offspring
Introduction It has been suggested that prenatal stress contributes to the risk of obesity later in life. In a population-based cohort study, we examined whether prenatal stress related to maternal bereavement during pregnancy was associated with the risk of overweight in the offspring in young adulthood. Methods We conduct a cohort study of 109 919 Danish men who were born in 1986-1990 and presented for conscription in 2006–2009. By linkage of t…
Chronology of the Danish Bronze Age Based on 14 C Dating of Cremated Bone Remains
The relative Bronze Age chronology for Scandinavia was established as early as 1885. It is traditionally divided into 6 periods (I–VI). Earlier attempts to make an absolute Bronze Age chronology for southern Scandinavia were derived from burials and settlements and were mainly based on radiocarbon-dated charcoal or carbonized cereals, often with undefined archaeological periods. Here, we present high-precision 14 C dating on burials with well-def…
Variability of the North Atlantic Oscillation over the past 5,200 years
Archaeology (90 obras) · Geography (84 obras) · Archaeology and ancient environmental studies (66 obras) · Geology (58 obras) · History (58 obras) · History (46 obras) · Geology and Paleoclimatology Research (37 obras) · Ancient history (36 obras) · Radiocarbon dating (36 obras) · Paleontology (32 obras)