Results 21 to 30 of about 899,223 (198)

Complex “human−vegetation−climate” interactions in the Late Holocene and their significance for paleotemperature reconstructions [PDF]

open access: yesProceedings of the National Academy of Sciences, 2020
Using 3,980 14C ages and 43,669 pollen data from 632 globally distributed lakes (∼88% of them in North America and Europe; Fig. 1 A ), Jenny et al. (1) demonstrate that increased soil erosion rates (Fig. 1 B ) and decreased tree coverage (Fig. 1 C ) have occurred in lake watersheds across a substantial portion of Earth’s surface since ∼4,000 y BP ...
Yunxia, Li   +7 more
openaire   +2 more sources

North Pacific Paleotemperature and Paleoproductivity Reconstructions Based on Diatom Species [PDF]

open access: yesPaleoceanography and Paleoclimatology, 2018
AbstractRegionally developed diatom‐based transfer functions reconstruct both summer sea surface temperature and primary productivity (PP) in the North Pacific based on a calibration data set including the eastern subtropical gyre (California and Oregon), the Gulf of Alaska, the western Pacific, and Bering Sea.
C. Lopes, A. C. Mix
openaire   +1 more source

Reconstruction of paleo-temperature and pressure of oil reservoirs based on PVTx simulation: problems, strategies and case studies

open access: yesShiyou shiyan dizhi, 2021
The PVTx simulation of fluid inclusions is a valuable method for the reconstruction of paleo-temperature and pressure of oil reservoir. Since the accurate composition of oil-bearing inclusion is very difficult to be obtained and the composition may be ...
Binbin XI   +4 more
doaj   +1 more source

Accuracy and Reproducibility of Coral Sr/Ca SIMS Timeseries in Modern and Fossil Corals

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Coral strontium‐to‐calcium ratios (Sr/Ca) provide quantitative estimates of past sea surface temperatures (SST) that allow for the reconstruction of changes in the mean state and climate variations, such as the El Nino‐Southern Oscillation, through time.
Hussein R. Sayani   +3 more
doaj   +1 more source

Growing season thermal climate reconstructed at six pine stands in northern Lapland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1994
At the northern coniferous timberline of the boreal region, growing season temperature is generally the major environmental factor limiting the growth processes of Scots pine (Pinus sylvestris L.). Variations in annual ring-widths of pines can be related
M. Lindholm, J. Meriläinen
doaj   +1 more source

Implications for the branched tetraether membrane lipid temperature proxy in Arctic paleoclimate reconstruction––Evidence over the Holocene from Baffin Island lacustrine sediment [PDF]

open access: yes, 2020
This thesis aims to assess the validity of bacterial branched glycerol dialkyl glycerol tetraethers (brGDGTs) temperature reconstructions in Arctic lake settings from a Holocene (~11,700 BP) lacustrine sediment core from Baffin Island, Eastern Canadian ...
Eaman, Katelyn A.
core   +6 more sources

Paleotemperature reconstruction using environmental isotopes and noble gases in groundwater in Morocco [PDF]

open access: yesHydrogeology Journal, 2020
AbstractA Turonian limestone-dolomite aquifer from the Tadla basin of Morocco was analysed using a multi-tracer approach (δ18O, δ2H, δ13C, 3H, 14C and noble gases) to reconstruct the paleotemperature evolution from the late Pleistocene to the Holocene.
Marianna Túri   +5 more
openaire   +1 more source

Paleoenvironment Variability during Termination I at the Reykjanes Ridge, North Atlantic

open access: yesGeosciences, 2018
The micropaleontological study (radiolarians and foraminifera) of the sediment core AMK-340, Reykjanes Ridge, North Atlantic, combined with the radiocarbon dating and oxygen and carbon isotopic record, provided data for the reconstruction of the summer ...
Alexander Matul   +4 more
doaj   +1 more source

Mg∕Ca, Sr∕Ca and stable isotopes from the planktonic foraminifera T. sacculifer: testing a multi-proxy approach for inferring paleotemperature and paleosalinity [PDF]

open access: yesBiogeosciences, 2021
Over the last decades, sea surface temperature (SST) reconstructions based on the Mg∕Ca of foraminiferal calcite have frequently been used in combination with the δ18O signal from the same material to provide estimates of the δ18O of water (δ18Ow), a ...
D. Dissard   +7 more
doaj   +1 more source

Planktonic foraminiferal Mg/Ca as a proxy for past oceanic temperatures: a methodological overview and data compilation for the Last Glacial Maximum [PDF]

open access: yes, 2005
As part of the Multi-proxy Approach for the Reconstruction of the Glacial Ocean (MARGO) incentive, published and unpublished temperature reconstructions for the Last Glacial Maximum (LGM) based on planktonic foraminiferal Mg/Ca ratios have been ...
Tachikawa, Kazuyo   +12 more
core   +1 more source

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