Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years

Meyer, Vera; Hefter, Jens; Lohmann, Gerrit; Max, Lars; Tiedemann, Ralf; Mollenhauer, Gesine

doi:10.5194/cp-13-359-2017

Cited by 20 publications

(16 citation statements)

References 129 publications

(241 reference statements)

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“…In this study, the HTM appears to reflect a bias towards a summer signal. 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).…”

Section: Introductionmentioning

confidence: 99%

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: 99%

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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“…Widespread deposition of laminations occurred in North Pacific sediments during the Bølling‐Allerød (14.9–12.9 ka) and Pre‐Boreal (~11.7–10.7 ka) (Mangerud et al, ; Van der Plicht et al, ) warm periods. The early Holocene was characterized globally by warmer temperatures (Meyer et al, ), and in the Bering Sea by increased productivity and laminated sediments (e.g., Kuehn et al, ). Laminations from these time periods are found along the northwest coast of Mexico (Ganeshram & Pedersen, ), Gulf of California (Barron et al, ; Keigwin, ; Sancetta, ), Santa Barbara Basin (Hendy & Kennett, ; Kennett & Ingram, ), California margin (Gardner et al, ; Mix et al, ), northwestern Pacific (Brunelle et al, ; Keigwin et al, ; Shibahara et al, ), Sea of Japan (Takahashi, ), and the Bering Sea (Brunelle et al, ; Caissie et al, ; Cook et al, ; Itaki et al, ; Khim et al, ; Kim et al, ; Kuehn et al, ; Okazaki et al, ; Schlung et al, ).…”

Section: Introductionmentioning

confidence: 99%

Oceanographic and Climatic Change in the Bering Sea, Last Glacial Maximum to Holocene

Pelto

Caissie

Petsch

et al. 2018

Paleoceanog and Paleoclimatol

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Post‐glacial sea level rise led to a direct connection between the Arctic and Pacific Oceans via the Bering Strait. Consequently, the Bering Sea experienced changes in connectivity, size, and sediment sources that were among the most drastic of any ocean basin in the past 30,000 years. However, the sedimentary response to the interplay between climate change and sea level rise in high‐latitude settings such as Beringia remains poorly resolved. To ascertain changes in sediment delivery, productivity, and regional oceanography from the Last Glacial Maximum (LGM) to the Holocene, we analyzed sedimentological, geochemical, and isotopic characteristics of three sediment cores from the Bering Sea. Interpretations of productivity, terrestrial input, nutrient utilization, and circulation are based on organic carbon isotopes (δ13Corg), total organic carbon (TOC), bulk nitrogen isotopes, total organic nitrogen, carbon/nitrogen ratios, elemental X‐ray fluorescence data, grain size, and presence of laminated or dysoxic, green intervals. Principal component analysis of these data captures key climatic intervals. The LGM was characterized by low productivity across the region. In the Bering Sea, deglaciation began around 18–17 ka, with increasing terrestrial sediment and TOC input. Marine productivity increased during the Bølling‐Allerød when laminated sediments revealed dysoxic bottom waters where denitrification was extreme. The Younger Dryas manifested increased terrestrial input and decreased productivity, in contrast with the Pre‐Boreal, when productivity markedly rebounded. The Pre‐Boreal and Bølling‐Allerød were similarly productive, but changes in the source of TOC and a δ13Corg depletion suggest the influence of a gradually flooding Bering Shelf during the Pre‐Boreal and Holocene.

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“…LGM summer temperatures close to present-day values (Meyer et al, 2017), suggesting that these processes are likely only part of the story. Existing and new coupled climate model results can shed light on these intriguing geological observations.…”

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confidence: 83%

“…Although situated at high northern latitudes, geological evidence suggests that Siberia was covered by continental ice sheets during some glacial periods, but remained largely ice free during, for instance, the LGM. Increased atmospheric dust deposition and a precipitation-shadow cast by the Eurasian ice sheets to the west are often highlighted as possible causes, however, such mechanisms cannot readily explain the absence of a Siberian ice sheet in some glacial periods, but its presence in others, nor explain reconstructions of Siberian LGM summer temperatures close to present-day values (Meyer et al, 2017). This is suggesting that these processes are likely only part of the story, and here we argue for the importance of changes in meridional atmospheric heat transport and the exact configuration of northern hemisphere continental ice sheets.…”

Section: Pmip3mentioning

confidence: 99%

“…Warming in Alaska and Siberia is linked to increased poleward heat transport induced by changes in the atmospheric stationary waves and to local feedbacks involving the surface albedo and atmospheric water vapor content (Liakka and Lofverstrom, 2018). An independent compilation of LGM temperature reconstructions based on various land proxy data provides support to these inferences showing that LGM summer temperatures in Northern Siberia were overall not very different from the relatively mild present-day temperatures in the region (Meyer et al, 2017).…”

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confidence: 92%

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Hypersensitivity of glacial temperatures in Siberia

Bakker

Rogozhina

Merkel

et al. 2019

Preprint

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Abstract. Climate change in Siberia is currently receiving a lot of attention as large permafrost-covered areas could provide a strong positive feedback to global warming through the release of carbon that has been sequestered there on glacial-interglacial time scales. Geological evidence and climate model experiments show that the Siberian region also played an exceptional role during glacial periods. The region that is currently known for its harsh cold climate did not experience major glaciations during the last ice age, including its severest stages around the Last Glacial Maximum (LGM). On the contrary, it is thought that glacial summer temperatures were comparable to present-day. We combine LGM experiments from the second and third phases of the Paleoclimate Modelling Intercomparison Project (PMIP2 and PMIP3) with sensitivity experiments with the Community Earth System Model (CESM). Together these climate model experiments reveal that the intermodel spread in LGM summer temperatures in Siberia is much larger than in any other region of the globe and suggest that temperatures in Siberia are highly susceptible to changes in the imposed glacial boundary conditions, the included feedbacks and processes, and to the model physics of the different components of the climate model. We find that changes in the large-scale atmospheric stationary wave pattern and associated northward heat transport drive strong local snow and vegetation feedbacks and that this combination explains the susceptibility of LGM summer temperatures in Siberia. This suggests that a small difference between two glacial periods in terms of climate, ice buildup or their respective evolution towards maximum glacial conditions, can lead to strongly divergent summer temperatures in Siberia, that are sufficiently strong to allow for the buildup of an ice sheet during some glacial periods, while during others, above-freezing summer temperatures will preclude a multi-year snow-pack from forming.

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Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years

Cited by 20 publications

References 129 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)

Oceanographic and Climatic Change in the Bering Sea, Last Glacial Maximum to Holocene

Hypersensitivity of glacial temperatures in Siberia

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Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years

Cited by 20 publications

References 129 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)

Oceanographic and Climatic Change in the Bering Sea, Last Glacial Maximum to Holocene

Hypersensitivity of glacial temperatures in Siberia

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Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years