Articolele autorului Vasile Ersek
Link la profilul stiintific al lui Vasile Ersek

Water isotopic variability in Mallorca: a path to understanding past changes in hydroclimate
Unveiling exceptional Baltic bog ecohydrology, autogenic succession and climate change during the last 2000 years in CE Europe using replicate cores, multi-proxy data and functional traits of testate amoebae
Bursa doctorala: Reconstructing monsoon variability in Vietnam using high-resolution stalagmite records

Using speleothems from northern Vietnam you will investigate the past dynamics of the Southeast Asian monsoon. Preliminary investigations in this area indicate the presence of speleothems suitable for palaeoclimate investigations with growth periods covering key intervals of climate change in the late Pleistocene and Holocene. You will develop a programme to monitor the cave hydrologic and environmental characteristics, and the connection to local

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A 9000 year record of cyclic vegetation changes identified in a montane peatland deposit located in the Eastern Carpathians (central-Eastern Europe): Autogenic succession or regional climatic influences?

We present a high-resolution, continuous plant macrofossil remains record complemented by a pollen sequence from Tăul Muced bog, in the Eastern Carpathian Mountains (Romania). The record spans the last 9000 years and we test whether peatland development in the Eastern Carpathians is linked to climate change or to autogenic succession. We find that Sphagnum magellanicum was the dominant peat-forming species for ca. 8000 years but we also identify

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Robust global ocean cooling trend for the pre-industrial Common Era

The oceans mediate the response of global climate to natural and anthropogenic forcings. Yet for the past 2,000 years — a key interval for understanding the present and future climate response to these forcings — global sea surface temperature changes and the underlying driving mechanisms are poorly constrained. Here we present a global synthesis of sea surface temperatures for the Common Era (ce) derived from 57 individual marine reconstructions

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Constraining Holocene hydrological changes in the Carpathian-Balkan region using speleothem d18O and pollen-based temperature reconstructions

Here we present a speleothem isotope record (POM2) from Ascunsã Cave (Romania) that provides new data on past climate changes in the Carpathian-Balkan region from 8.2 ka until the present. This paper describes an approach to constrain the effect of temperature changes on calcite δ18O values in stalagmite POM2 over the course of the middle Holocene (6-4 ka), and across the 8.2 and 3.2 ka rapid climate change events. Independent pollen temperature

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Funded PhD in Palaeoenvironment and Palaeoclimate at Northumbria University, UK

This project will develop a combination of peat bog and speleothem records with the aim to address the following objectives: 1. Establish a representative regional network of sedimentary records that would allow assessing at high resolution and through a multi-proxy (Pb, O, C isotopes, and elements that are normally associated with mining and smelting, e.g. Cu, Zn, Au, Ag, etc) approach at the Holocene scale the imprint of past anthropogenic activities.

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Holocene winter climate variability in mid-latitude western North America

Water resources in western North America depend on winter precipitation, yet our knowledge of its sensitivity to climate change remains limited. Similarly, understanding the potential for future loss of winter snow pack requires a longer perspective on natural climate variability. Here we use stable isotopes from a speleothem in southwestern Oregon to reconstruct winter climate change for much of the past 13,000 years. We find that on millennial

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Composition and sources of lipid compounds in speleothem calcite from southwestern Oregon and their paleoenvironmental implications

We analyzed speleothem calcite from the Oregon Caves National Monument, southwestern Oregon, to determine the preservation, distribution, concentrations and sources of aliphatic lipid compounds preserved in the calcite. Maximum speleothem growth rate occurs during interglaciations and minimum during glacial intervals. Concentrations of the total lipid compounds range from 0.5 to 12.9 ug g-1. They increase at times of low speleothem growth rate, suggesting

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Variations of [delta]18O in rainwater from southwestern Oregon

We examine the relation between d18O in rainwater collected in southwestern Oregon and climate variables including temperature, parcel trajectory, precipitation amount, and specific humidity. Local surface air temperature at the time of sample collection explains a large proportion of d18O variability suggesting that paleoclimatic archives that are related to rainfall d18O should be useful for qualitative temperature reconstructions. Models of Rayleigh

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