Vegetation and climate changes during the Middle to Upper Palaeolithic transition in the southwestern Mediterranean: What happened to the last Neanderthals during Heinrich stadial 4?

Quaternary Science Reviews, Год журнала: 2025, Номер 359, С. 109345 - 109345

Опубликована: Апрель 28, 2025

Язык: Английский

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Decoupled winter and summer climate changes in southern Europe during the Dansgaard-Oeschger cycles

Quaternary Science Reviews, Год журнала: 2025, Номер 359, С. 109273 - 109273

Опубликована: Апрель 28, 2025

Язык: Английский

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Large‐Volume Injection and Assessment of Reference Standards for n‐Alkane δD and δ¹³C Analysis via Gas Chromatography Isotope Ratio Mass Spectrometry

Rapid Communications in Mass Spectrometry, Год журнала: 2024, Номер 39(3)

Опубликована: Ноя. 26, 2024

Compound-specific stable isotope analysis of hydrogen (δD) and carbon (δ

Язык: Английский

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Tracing Holocene temperatures and human impact in a Greenlandic Lake: Novel insights from hyperspectral imaging and lipid biomarkers

Quaternary Science Reviews, Год журнала: 2024, Номер 339, С. 108851 - 108851

Опубликована: Июль 25, 2024

Global warming particularly impacts terrestrial and aquatic ecosystems in the Arctic. To constrain sensitivity of Arctic lakes make meaningful predictions about future change under global warming, we need to examine their response previous warm phases. Lake sediments from Greenland's deglaciated area offer valuable archives investigate past climate variability associated lake changes. Here, applied hyperspectral imaging lipid biomarker thermometry a Holocene-length sediment record 578 Eastern Settlement Norse (61.08° N, 45.62° W; ∼155 m a.s.l) local temperature, productivity, anoxia histories. We calibrated branched glycerol dialkyl tetraethers (brGDGTs) with summer mean water temperatures (SMWT) using previously published site-specific calibration analyzed pigment fluxes based on imaging. Notably, reconstructions were corroborated two independent proxies (GDGT-0/Crenarchaeol bacterio pheophytins). investigated lake's environmental history identified periods significant by employing generalized additive models (GAMs). Our results reveal transitions driven both natural shifts anthropogenic impacts. During early Holocene, low SMWT productivity coupled high suggest strong seasonality prolonged inverted thermal stratification, possibly enhanced extended ice cover. The mid-Holocene showed higher along anoxia, indicating dimictic system. Holocene temperature rise lagged that Northern Hemisphere, but closely followed Atlantic-Fennoscandian stack. Thermal Maximum (7.5–4.5 cal ka BP) aligns other regional reconstructions. After 3 BP, observed Neoglacial cooling characterized increased reduced due stratification. At around 1.0 saw surge which attribute land use damming Norse. Despite post-Norse decline disappearance never reverted its pre-Norse state, modern sheep farming further intensifying recent decades. While resulted cold during period was anthropogenically induced. This research underscores value integrating biomarkers for detailed changes within lakes. It provides crucial insights anticipating ecologic climatic resilience ongoing influence.

Язык: Английский

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Fine-Tuning of Sub-Annual Resolution Spectral Index Time Series from Eifel Maar Sediments, Western Germany, to the NGRIP δ18O Chronology, 26–60 ka

Quaternary, Год журнала: 2024, Номер 7(3), С. 33 - 33

Опубликована: Авг. 1, 2024

Recent technological advancements in spectral imaging core-scanning techniques have proved to be a promising tool study lake sediments at extremely high resolution. We used this novel analytical approach scan core AU3 of the Pleistocene Auel maar, Western Germany. The resulting ultra-high-resolution RABD670 index, proxy for lake’s primary production, shows an almost complete succession Greenland Interstadials NGRIP ice chronology back around 60,000 years. Using ELSA-20 and its anchor points record as stratigraphic basis, we were able compare fine-tune prominent climate signals occurring both regions. This in-depth correlation yields strong evidence that climates Central Europe not only strongly coupled on timescales stadials interstadials but even multidecadal scales, showing cycles between 20 125 As changes these regions ultimately driven by variations North Atlantic meridional heat transport, their coupling becomes most apparent during cold arid intervals. In contrast, longer-lasting warmer more humid phases caused activation various regional feedback mechanisms (e.g., soil formation, forest growth), complex patterns records.

Язык: Английский

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Detecting ecological signatures of long-term human activity across an elevational gradient in the Šumava Mountains, Central Europe

Quaternary Science Reviews, Год журнала: 2024, Номер 344, С. 108944 - 108944

Опубликована: Сен. 17, 2024

Язык: Английский

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Chironomid-inferred summer temperature during the Last Glacial Maximum in the Southern Black Forest, Central Europe

Quaternary Science Reviews, Год журнала: 2024, Номер 345, С. 109016 - 109016

Опубликована: Окт. 30, 2024

Язык: Английский

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