Results 1 to 10 of about 4,904 (146)

Regional variability of diatoms in ice cores from the Antarctic Peninsula and Ellsworth Land, Antarctica [PDF]

open access: yesThe Cryosphere, 2022
The presence of marine microfossils (diatoms) in glacier ice and ice cores has been documented from numerous sites in Antarctica, Greenland, as well as from sites in the Andes and the Altai mountains, and attributed to entrainment and transport by winds.
D. R. Tetzner   +3 more
doaj   +1 more source

Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy [PDF]

open access: yesClimate of the Past, 2022
The Southern Hemisphere westerly winds are among the most important drivers of recently observed environmental changes in West Antarctica. However, the lack of long-term wind records in this region hinders our ability to assess the long-term context of ...
D. R. Tetzner   +4 more
doaj   +1 more source

Hotspots for warm and dry summers in Romania [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2022
The combined effect of hot and dry extremes can have disastrous consequences for society, the economy, and the environment. While a significant number of studies have been conducted regarding the variability of the individual hot or dry extremes in ...
V. Nagavciuc   +5 more
doaj   +1 more source

Decadal Scale Variability of Larsen Ice Shelf Melt Captured by Antarctic Peninsula Ice Core

open access: yesGeosciences, 2022
In this study, we used the stable water isotope record (δ18O) from an ice core drilled in Palmer Land, southern Antarctic Peninsula (AP). Utilizing δ18O we identified two climate regimes during the satellite era.
B. Daniel Emanuelsson   +3 more
doaj   +1 more source

Geochemical signatures of sedimentary and diagenetic processes in the trace fossil Rosselia from the Pliocene in Taiwan

open access: yesScientific Reports, 2022
Trace fossils are structures left in a substrate as the result of the activities of living organisms. The producer of the spindle-shaped trace fossil Rosselia incorporates fine-grained organic rich material into concentric layers surrounding the central ...
Yu‑Hsuan Liou   +3 more
doaj   +1 more source

On the Evolution of Paleoclimate and Paleoenvironment in Eastern Beijing Plain in the Last 70,000 Years Based on the Sediment Chronological Framework [PDF]

open access: yesE3S Web of Conferences, 2021
To study the paleoenvironment and paleoclimate of eastern Beijing Plain, this paper, based on particle size analysis and sporopollen analysis, constructs a sediment chronological framework.
Li Tengfei
doaj   +1 more source

Response of Arctic benthic foraminiferal traits to past environmental changes

open access: yesScientific Reports, 2023
The Arctic is subjected to all-encompassing disruptions in marine ecosystems caused by anthropogenic warming. To provide reliable estimates of how future changes will affect the ecosystems, knowledge of Arctic marine ecosystem responses to past ...
Katrine Elnegaard Hansen   +2 more
doaj   +1 more source

A Synoptic Scale Perspective on Greenland Ice Core δ18O Variability and Related Teleconnection Patterns

open access: yesAtmosphere, 2021
The variability of stable oxygen isotope ratios (δ18O) from Greenland ice cores is commonly linked to changes in local climate and associated teleconnection patterns. In this respect, in this study we investigate ice core δ18O variability from a synoptic
Norel Rimbu   +2 more
doaj   +1 more source

Compound Hot and Dry Events in Europe: Variability and Large-Scale Drivers

open access: yesFrontiers in Climate, 2021
An important aspect of inevitable surprises, for the climate system, is the potential of occurrence of compound extreme events. These can be events that occur at the same time over the same geographic location or at multiple locations within a given ...
Monica Ionita   +3 more
doaj   +1 more source

Ice Core Chronologies from the Antarctic Peninsula: The Palmer, Jurassic, and Rendezvous Age-Scales

open access: yesGeosciences, 2022
In this study, we present the age scales for three Antarctic Peninsula (AP) ice cores: Palmer, Rendezvous, and Jurassic. The three cores are all intermediate-depth cores, in the 133–141 m depth range.
B. Daniel Emanuelsson   +4 more
doaj   +1 more source

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