Pollen-based continental climate reconstructions at 6 and 21 ka: a global synthesis

Bartlein, Patrick J.; Harrison, Sandy P.; Brewer, Simon; Connor, Simon; Davis, Basil; Gajewski, Konrad; Guiot, Joël; Harrison-Prentice, T I; Henderson, Acg; Peyron, Odile; Prentice, I. Colin; Scholze, Marko; Seppä, Heikki; Shuman, Bryan N.; Sugita, S.; Thompson, Robert S.; Viau, André E.; Williams, John W.; Wu, Haibin

doi:10.1007/s00382-010-0904-1

Cited by 627 publications

(795 citation statements)

References 138 publications

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“…Following Davis et al (2003), we only used sites with chronologies based on radiometric or other independent dating . This contrasts with most previous studies (Huntley and Prentice, 1988;Guiot et al, 1993;Cheddadi et al, 1997;Wu et al, 2007;Bartlein et al, 2010) which have relied heavily on the data set of Huntley and Birks (1983) where around 35 % of the sites had no 14C dates or other independent dating control (Guiot et al, 1993). In addition to existing data quality checks on the surface sample training set we also undertook a further check on the geo-referencing using a high-resolution digital elevation model (DEM) (Jarvis et al, 2008).…”

Section: Methodsmentioning

confidence: 94%

“…The latter time window approach can result in samples being treated as concurrent, when in fact they can be up to 1000 years distant from each other and up to 500 years from the target time. Using our 4-D method, we reconstructed the climate parameters of summer and winter temperatures and precipitation that have been widely used in previous pollen-climate studies (Bartlein et al, 2010). An evaluation of the climate reconstruction method based on n-fold leave-one-out crossvalidation is shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

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The influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparison

Mauri

Davis

Collins³

et al. 2014

Clim. Past

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113

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Abstract. The atmospheric circulation is a key area of uncertainty in climate model simulations of future climate change, especially in mid-latitude regions such as Europe where atmospheric dynamics have a significant role in climate variability. It has been proposed that the mid-Holocene was characterized in Europe by a stronger westerly circulation in winter comparable with a more positive AO/NAO, and a weaker westerly circulation in summer caused by anticyclonic blocking near Scandinavia. Model simulations indicate at best only a weakly positive AO/NAO, whilst changes in summer atmospheric circulation have not been widely investigated. Here we use a new pollen-based reconstruction of European mid-Holocene climate to investigate the role of atmospheric circulation in explaining the spatial pattern of seasonal temperature and precipitation anomalies. We find that the footprint of the anomalies is entirely consistent with those from modern analogue atmospheric circulation patterns associated with a strong westerly circulation in winter (positive AO/NAO) and a weak westerly circulation in summer associated with anti-cyclonic blocking (positive SCAND). We find little agreement between the reconstructed anomalies and those from 14 GCMs that performed mid-Holocene experiments as part of the PMIP3/CMIP5 project, which show a much greater sensitivity to top-of-the-atmosphere changes in solar insolation. Our findings are consistent with datamodel comparisons on contemporary timescales that indicate that models underestimate the role of atmospheric circulation in recent climate change, whilst also highlighting the importance of atmospheric dynamics in explaining interglacial warming.

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Section: Methodsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

The influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparison

Mauri

Davis

Collins³

et al. 2014

Clim. Past

Self Cite

113

View full text Add to dashboard Cite

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“…The lack of evidence for beeswax use at Neolithic sites north of the 57th parallel North may suggest an ecological limit to the natural occurrence of honeybees. Indeed, harsh high latitude conditions, even with temper atures warmer than today 29 , would affect the foraging capabilities of honeybees 30 . Critically, in the absence of a Holocene fossil record for A. mellifera 7 these findings provide the first ancient biomolecule based palaeoecological map of the distribution of an economically and cul turally important animal (Fig.…”

Section: Letter Researchmentioning

confidence: 99%

Widespread exploitation of the honeybee by early Neolithic farmers

Roffet‐Salque

Regert

Evershed

et al. 2015

Nature

162

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“…europeanpollendatabase.net) have compiled numerous pollen data from surface lake sediments. These pollen data have been successfully used as modern calibration sets for quantitatively reconstructing the late Quaternary climatic changes in North America and Europe (e.g., Bartlein et al, 2011). In East Asia, many modern pollen databases have also been established (e.g., Sun et al, 1999;Lu et al, 2011;Zheng et al, 2013), and they have provided robust references to help interpret fossil pollen assemblages.…”

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confidence: 99%

Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate

Feng

Zhao

et al. 2015

Sci. China Earth Sci.

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The modern pollen assemblages of surface lake sediments and topsoils in northwestern China were studied to understand the relationship of modern pollen data with contemporary vegetation and climate, and the differences between the pollen assemblages of surface lake sediments and topsoils. The results show that Chenopodiaceae and Artemisia are dominant elements in the pollen assemblages of northwestern China. Additionally, Ephedra, Cyperaceae, Asteraceae, Poaceae, Picea, Pinus, and Betula are also important pollen taxa. Both pollen assemblages and principal component analysis indicate that pollen data from surface lake sediments and topsoils can be used to differentiate the main vegetation types of this region (desert, steppe, meadow and forest). However, differences exist between modern pollen assemblages of the two types of sediments due to the different relevant source areas of pollen and degrees of pollen preservation. For example, the larger relevant source area of surface lake sediment results in a higher abundance of Betula in pollen assemblage from surface lake sediment, whereas the tendency to disintegrate thin-walled pollen types in topsoil leads to a higher proportion of resistant pollen, such as Asteraceae. Linear regression analysis indicates that the Artemisia/Chenopodiaceae (A/C) ratio in pollen assemblages of surface lake sediments can be used to indicate humidity changes in the study area. However, the A/C ratio in topsoils should be used carefully. Our results suggest that pollen data from surface lake sediments would be better references for interpreting the fossil pollen assemblages of lake cores or lacustrine profiles. Pollen data have been used to unravel the vegetation succession and climatic changes of the past since the pioneering work of von Post in 1916(Davis, 2000. The deciphering of fossil pollen data must be performed on the basis of the investigation of modern pollen assemblages. Numerous studies (e.g., Wright et al., 1967;Gaillard et al., 1992;Sugita, 1994;Cour et al., 1999;Davis, 2000;Shen et al., 2006;Ma et al., 2008;Zhao and Herzschuh, 2009;Herzschuh et al., 2010;Lu et al., 2011;Fall, 2012;Zheng et al., 2013;Tian et al., 2014) have been conducted to understand the relationship of modern pollen assemblages with contemporary vegetation and climate. Modern pollen assemblages are mainly collected from airborne pollen collectors (e.g., Cour et al

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Pollen-based continental climate reconstructions at 6 and 21 ka: a global synthesis

Cited by 627 publications

References 138 publications

The influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparison

The influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparison

Widespread exploitation of the honeybee by early Neolithic farmers

Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate

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