Detrital events and hydroclimate variability in the Romanian Carpathians during the mid-to-late Holocene

Longman, Jack; Ersek, Vasile; Vereș, Daniel; Salzmann, Ulrich

doi:10.1016/j.quascirev.2017.04.029

Cited by 29 publications

(61 citation statements)

References 105 publications

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“…Compared to the hydrology of central-western Europe, which is primarily influenced by Atlantic forcings, meteorological observations 14,28,29 and proxy data 25,26,30 show south-eastern Europe is periodically subjected to the North Atlantic, Siberian and Mediterranean atmospheric pressure systems. As a result, local to regional climate is seasonally and sometimes abruptly affected by shifts in these systems 23,30–32 .…”

Section: Introductionmentioning

confidence: 95%

Runoff events and related rainfall variability in the Southern Carpathians during the last 2000 years

Longman

Vereș

Ersek

et al. 2019

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The occurrence of heavy rainfall events is expected to undergo significant changes under increasing anthropogenic forcing. South-eastern Europe is reacting rapidly to such changes, therefore understanding and forecasting of precipitation variability is vital to better comprehending environmental changes in this area. Here we present a sub-decadal reconstruction of enhanced rainfall events for the past 2000 years from the Southern Carpathians, Romania using peat geochemistry. Five clear periods of enhanced rainfall are identified at 125–250, 600–900, 1050–1300, 1400–1575 and 1725–1980 CE. Significant runoff is observed during the second half of the Medieval Warm Period, whilst the Little Ice Age was characterised by significant variability. The North Atlantic Oscillation appears to be the main control on regional precipitation, but changes in solar irradiance also seem to play a significant role, together with the Siberian High. Comparison of the data presented here with model outputs confirms the ability of models to predict general trends, and major shifts, but highlights the complexity of the region’s hydrological history.

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Section: Introductionmentioning

confidence: 95%

Runoff events and related rainfall variability in the Southern Carpathians during the last 2000 years

Longman

Vereș

Ersek

et al. 2019

Sci Rep

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“…To determine this, the impact of different modes of atmospheric (and moisture) circulation patterns and their imprint within paleoclimate archives must be investigated through better regional coverage following high-resolution multi-proxy approaches (e.g. Longman et al, 2017;Haliuc et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Periodic input of dust over the Eastern Carpathians during the Holocene linked with Saharan desertification and human impact

et al. 2017

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Abstract. Reconstructions of dust flux have been used to produce valuable global records of changes in atmospheric circulation and aridity. These studies have highlighted the importance of atmospheric dust in marine and terrestrial biogeochemistry and nutrient cycling. By investigating a 10 800-year-long paleoclimate archive from the Eastern Carpathians (Romania) we present the first peat record of changing dust deposition over the Holocene for the CarpathianBalkan region. Using qualitative (X-ray fluorescence (XRF) core scanning) and quantitative inductively coupled plasma optical emission spectrometer(ICP-OES) measurements of lithogenic (K, Si, Ti) elements, we identify 10 periods of major dust deposition between 9500-9200, 8400-8100, 7720-7250, 6350-5950, 5450-5050, 4130-3770, 3450-2850, 2000-1450, 800-620, and 60 cal yr BP to present. In addition, we used testate amoeba assemblages preserved within the peat to infer local palaeohydroclimatic conditions. Our record highlights several discrepancies between eastern and western European dust depositional records and the impact of highly complex hydrological regimes in the Carpathian region. Since 6100 cal yr BP, we find that the geochemical indicators of dust flux have become uncoupled from the local hydrology. This coincides with the appearance of millennial-scale cycles in the dust input and changes in geochemical composition of dust. We suggest that this is indicative of a shift in dust provenance from local-regional (likely loess-related) to distal (Saharan) sources, which coincide with the end of the African Humid Period and the onset of Saharan desertification.

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“…The first detectable signs of significant anthropogenic impact over south-eastern Europe are traceable back to the Late Neolithic circa 7500 years ago, following the early advent of agriculture [14], shifts in land-use [15] and metal processing in this region [16]. Furthermore, as the Carpathian area sits at the junction of three major atmospheric pressure systems in Europe, the Atlantic, Mediterranean and Siberian High [17], retrieving reliable paleolimnological data from natural archives in this region underscores the need to reliably disentangle natural hydroclimate forcing on one hand [18][19][20][21] from longer term anthropogenic signals on the other [22,23]. It has been shown that even for relatively remote highaltitude environments in the Carpathians, recent human activities have greatly altered landscape stability and thereby the lacustrine depositional regimes [24,25].…”

Section: Introductionmentioning

confidence: 99%

Climate and land-use as the main drivers of recent environmental change in a mid-altitude mountain lake, Romanian Carpathians

et al. 2020

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Recent decades have been marked by unprecendented environmental changes which threaten the integrity of freshwater systems and their ecological value. Although most of these changes can be attributed to human activities, disentagling natural and anthropogenic drivers remains a challenge. In this study, surface sediments from Lake Ighiel, a mid-altitude site in the Carpathian Mts (Romania) were investigated following high-resolution sedimentological, geochemical, environmental magnetic and diatom analyses supported by historical cartographic and documentary evidence. Our results suggest that between 1920 and 1960 the study area experienced no significant anthropogenic impact. An excellent correspondence is observed between lake proxy responses (e.g., growth of submerged macrophytes, high detrital input, shifts in diatom assemblages) and parameters tracking natural hydroclimate variability (e.g., temperature, NAO). This highlights a dominant natural hydroclimatic control on the lacustrine system. From 1960 however, the depositional regime shifted markedly from laminated to homogenous clays; since then geochemical and magnetic data document a trend of significant (and ongoing) subsurface erosion across the catchment. This is paralleled by a shift in lake ecosystem conditions denoting a strong response to an intensified anthropogenic impact, mainly through forestry. An increase in detrital input and marked changes in the diatom community are observed over the last three decades, alongside accelerated sedimentation rates following enhanced grazing and deforestation in the

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Detrital events and hydroclimate variability in the Romanian Carpathians during the mid-to-late Holocene

Cited by 29 publications

References 105 publications

Runoff events and related rainfall variability in the Southern Carpathians during the last 2000 years

Runoff events and related rainfall variability in the Southern Carpathians during the last 2000 years

Periodic input of dust over the Eastern Carpathians during the Holocene linked with Saharan desertification and human impact

Climate and land-use as the main drivers of recent environmental change in a mid-altitude mountain lake, Romanian Carpathians

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