A Possible Role of Dust in Resolving the Holocene Temperature Conundrum

Liu, Yonggang; Zhang, Ming; Liu, Zhengyu; Xia, Yan; Huang, Yi; Peng, Yiran; Zhu, Jiang

doi:10.1038/s41598-018-22841-5

Cited by 49 publications

(47 citation statements)

References 43 publications

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“…Qualitative temperature records from Eurasia (Baker et al, 2017) and quantitative temperature reconstructions from Eastern Russia (Meyer et al, 2017) support the warming trend through the Holocene evidenced by Marsicek et al (2018). Several discrepancies between proxyinferred climate reconstructions and model outputs persist and suggest: i) large regional heterogeneities (Davis et al, 2003;Kaufman et al, 2004;Jansen et al, 2007Jansen et al, , 2008Renssen et al, 2012;Peyron et al, 2017;Marsicek et al, 2018); ii) different trends depending on the season considered (Mauri et al, 2014(Mauri et al, , 2015Rehfeld et al, 2016;Marsicek et al, 2018); iii) seasonal biases in proxies (Marcott et al, 2013;Liu et al, 2014;Rehfeld et al, 2016;Samartin et al, 2017;Marsicek et al, 2018;Hou et al, 2019); iv) under-estimation of some forcing factors by models (mineral dust, Liu et al, 2018, or deglaciation, Renssen et al, 2009, and v) biases in the climate sensitivity of current climate models (Liu et al, 2014;Mauri et al, 2014;Zhang et al, 2018). Therefore, climate changes during the Holocene at local, regional and global scales remain an area of active research and debate.…”

Section: Introductionmentioning

confidence: 89%

Early Holocene Thermal Maximum recorded by branched tetraethers and pollen in Western Europe (Massif Central, France)

Martin

Ménot

Thouveny

et al. 2020

Quaternary Science Reviews

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The evolution of temperatures during the Holocene is controversial, especially for the early Holocene. The occurrence of the Holocene Thermal Maximum (HTM) during the early Holocene has recently been reconsidered and seasonal biases have been suggested in the paleoclimatic proxies. High regional variability and a low number of reliable and continuous quantitative reconstructions compared with the oceanic realm further complicate study of the Holocene climate in the continental realm. We analyzed branched glycerol dialkyl glycerol tetraethers (brGDGTs), an organic paleothermometer, and palynological signals as part of a multiproxy analysis of the sedimentary record from Lake St Front, in the Massif Central (France). Identification of a shift in brGDGT sources through the Holocene required removing terrigenous influences from the temperature signal. BrGDGT-and pollen-inferred paleotemperature reconstructions (based on the Modern Analog Technique and the Weighted Averaging Partial Least Squares method) were compared. Both showed a thermal maximum during the early Holocene followed by a decrease of temperatures. We evaluated biases which could potentially influence the reconstructed signal. There was no evidence for a summer temperature bias either for brGDGT-derived temperatures or for pollen-derived temperatures. The Lake St Front data, in agreement with other regional records, confirm the occurrence of the HTM as a general warm period during the early Holocene followed by mid-Holocene cooling in Western Europe and suggest that seasonal biases are not the main explanation of the Holocene conundrum d the disagreement between model simulations and proxy-based temperature reconstructions for the northern hemisphere.

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Section: Introductionmentioning

confidence: 89%

Early Holocene Thermal Maximum recorded by branched tetraethers and pollen in Western Europe (Massif Central, France)

Martin

Ménot

Thouveny

et al. 2020

Quaternary Science Reviews

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“…This disparity is referred to as the "Holocene temperature conundrum" (Liu et al, 2014). The exact reasons for the Holocene temperature conundrum remain unclear, but possible causes including seasonal bias in the proxy reconstructions (e.g., underrepresentation of winter proxies) (Baker et al, 2017;Meyer et al, 2015) and uncertainties in current climate models (e.g., incomplete forcing and underestimated sensitivities) (Liu et al, 2014(Liu et al, , 2018Zhang, Renssen et al 2018) have been proposed. Some studies show that the warming trends were limited to regions where the cooling forced by the remnant continental ice sheets (the Fennoscandia ice sheet and the Laurentide ice sheet) exceeded the warming forced by the high Northern Hemisphere summer insolation (NHSI) during the early to mid-Holocene (Baker et al, 2017;Marsicek et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Temperature Trends in the Northwestern Tibetan Plateau Constrained by Ice Core Water Isotopes Over the Past 7,000 Years

et al. 2020

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The reasons for the Holocene temperature conundrum, known as the inconsistency between the reconstructed cooling and the inferred warming simulations during the Holocene, remain unclear. Temperature reconstructions from the Tibetan Plateau (TP) provide important insights for understanding the Holocene temperature conundrum due to enhanced sensitivity to climate at high altitudes. Given the significant positive correlation between air temperature and δ 18 O in precipitation over the northern TP, the stable isotopic records of ice cores recovered from this area are widely used for paleotemperature reconstruction. Here we present a new high-resolution δ 18 O record from the Chongce ice cores to bedrock, dated back to 7 ka BP by the accelerator mass spectrometry (AMS) 14 C dating technique. Our reconstructed temperature record shows a long-term warming trend until~2 ka BP, followed by an abrupt change to a relatively cool period until the start of the industrial-era warming. This record challenges the widely recognized Holocene reconstruction from the neighboring Guliya ice core. It is also different from many previous temperature reconstructions, most of which have summer biases and show a long-term cooling trend over the past two millennia. In addition, our record shows that temperatures during the recent decades are almost the highest during the past 7 ka BP, highlighting the unusual warming forced by anthropogenic greenhouse gases.

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“…However, except for the African Humid Period (AHP) (deMenocal et al, 2000;Ehrmann et al, 2017;McGee et al, 2013), the influence of the Holocene centennial climate variability on the past dust cycle remains poorly quantified (Cockerton et al, 2014;Mulitza et al, 2010), but it can be a key element of the forcing of climatic variations and therefore deserves to be integrated in transient climate simulations of the Holocene (Albani et al, 2015). For instance, the neglect of atmospheric dust reduction in the early to mid-Holocene in climate models could partly explain the model-data temperature discrepancy in the Northern Hemisphere (Liu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The respective influence of fluvial versus eolian input and the low time resolution of marine sedimentary records over the Holocene period do not allow for studies of short-term (decadal to centennial) variability. Other continental archives such as peat bogs (Le Roux et al, 2012;Longman et al, 2017) and lakes (Zielhofer et al, 2017) demonstrate the possibility to record African dust. A recent study in the Iberian Peninsula shows the potential for highelevation lake sediment to record African dust (Jiménez-Espejo et al, 2014), despite the low resolution of the sequence.…”

Section: Introductionmentioning

confidence: 99%

Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the Intertropical Convergence Zone, the North Atlantic Oscillation, and total solar irradiance

et al. 2020

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North Africa is the largest source of mineral dust on Earth, which has multiple impacts on the climate system; however, our understanding of decadal to centennial changes in African dust emissions over the last few millenniums is limited. Here, we present a high-resolution multiproxy analysis of sediment core from high-elevation Lake Bastani, on the island of Corsica, to reconstruct past African dust inputs to the western Mediterranean area over the last 3150 cal BP. Clay mineralogy with palygorskite and a clay ratio associated with geochemical data allow us to determine that terrigenous fluxes are almost exclusively related to atmospheric dust deposition from the western Sahara and Sahel areas over this period. High-resolution geochemical contents provide a reliable proxy for Saharan dust inputs with long-term (millennial) to short-term (centennial) variations. Millennial variations have been correlated with the long-term southward migration of the Intertropical Convergence Zone (ITCZ), with an increase in dust input since 1070 cal BP. This correlation suggests a strong link with the ITCZ and could reflect the increased availability of dust sources to be mobilized with an increase in wind and a decrease in precipitation over western and North Africa. For centennial to decadal variations, wavelet analyses show that since 1070 cal BP, the North Atlantic Oscillation (NAO) has been the main climatic forcing, with an increase in Saharan dust input during the positive phase, as suggested by previous studies over the last decades. However, when the ITCZ is in a northern position, before 1070 cal BP, wavelet analyses indicate that total solar irradiance (TSI) is the main forcing factor, with an increase in African dust input during low TSI. With climate reanalysis over the instrumental era, during low TSI we observe a significant negative anomaly in pressure over Africa, which is known to increase the dust transport. These two climatic forcing factors (NAO, TSI) modulate Saharan dust inputs to the Mediterranean area at a centennial timescale through changes in wind and transport pathways.Published by Copernicus Publications on behalf of the European Geosciences Union.

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A Possible Role of Dust in Resolving the Holocene Temperature Conundrum

Cited by 49 publications

References 43 publications

Early Holocene Thermal Maximum recorded by branched tetraethers and pollen in Western Europe (Massif Central, France)

Early Holocene Thermal Maximum recorded by branched tetraethers and pollen in Western Europe (Massif Central, France)

Temperature Trends in the Northwestern Tibetan Plateau Constrained by Ice Core Water Isotopes Over the Past 7,000 Years

Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the Intertropical Convergence Zone, the North Atlantic Oscillation, and total solar irradiance

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