Caspian sea-level changes during the last millennium: historical and geological evidence from the south Caspian Sea

Beni, Abdolmajid Naderi; Lahijani, Hamid; Harami, Reza Mousavi; Arpe, Klaus; Leroy, Suzanne A.G.; Marriner, Nick; Berberian, Manuel; Andrieu‐Ponel, Valérie; Djamali, Morteza; Mahboubi, Asadollah; Reimer, Paula J.

doi:10.5194/cp-9-1645-2013

Cited by 76 publications

(18 citation statements)

References 57 publications

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“…The Gorgan transect ostracods imply a larger reservoir offset (747 ± 29 yr) than previous studies (i.e. from 290 to 410 yr; Leroy et al, 2011;Naderi Beni et al, 2013), but may not be as reliable for dating in general as filter-feeding molluscs due to differences in habitat.…”

Section: Radiocarbon Datingcontrasting

confidence: 59%

“…Much too often, economic activities around the Caspian Sea cannot adapt to these rapid changes. Caspian Sea level has varied by as much as 10 m over the past millennium (Naderi Beni et al, 2013), although this has been partly due to human impact (Haghani et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The area chosen for this study is the south-east corner of the Caspian Sea (offshore Gorgan, SW Iran), as several palaeorecords have already been obtained in this region (e.g. Leroy et al, 2011Leroy et al, , 2013aNaderi Beni et al, 2013;Kakroodi et al, 2015) (Fig. 1B).…”

Section: Introductionmentioning

confidence: 99%

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Multi-proxy indicators in a Pontocaspian system: a depth transect of surface sediment in the SE Caspian Sea

Leroy¹,

Chalié²,

Wesselingh³

et al. 2018

Geol. Belg.

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The response of large water-bodies to global change in terms of ecosystem services and economical value is a major concern. The Caspian Sea, the world's largest enclosed water-body, has a poorly-known water-level history, but observed changes are a hundred times faster than recent global sea-level rise. This ancient lake, characterised by brackish waters, is rich in endemic species; some of them have spread to similar environments worldwide. However, the ecology of Pontocaspian species remains poorly understood and must be studied in their original habitat. This work aims at improving the capacity to reconstruct Quaternary environments of the Pontocaspian region and to provide a benchmark for biodiversity turnover studies. A transect of surface sediment across a wide shelf was subjected to multidisciplinary analyses: stable isotopes, pollen, dinocysts, diatoms, foraminifers, ostracods and molluscs and vertical oceanographic profiles. Three depositional environments with characteristic communities were found: shore face, shelf and slope. Invasion impact was strongly felt by the molluscs. All biota groups, except diatoms, reflected high endemism. The radiocarbon reservoir effect is highlighted in differential 14 C ages for different groups. Understanding such discrepancies require detailed insight into reworking processes. Tephra presence in the sediment shows a potential for tephrochronology. Stable isotope ratios in ostracods appear to reflect temperature depth gradients. Our results provide a baseline for calibrating proxy data to the present Pontocaspian environment.

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Section: Radiocarbon Datingcontrasting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

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Multi-proxy indicators in a Pontocaspian system: a depth transect of surface sediment in the SE Caspian Sea

Leroy¹,

Chalié²,

Wesselingh³

et al. 2018

Geol. Belg.

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“…The Caspian Sea and its rapid fluctuations at sea level during the Holocene have been the subject of many studies over the past two decades (Lahijani et al, 2009, Leroy et al, 2011Kakroodi et al, 2012b, NaderiBeni et al, 2013a, NaderiBeni et al, 2013b. The Caspian Basin, after separating from the open sea, became a lake at the time of Pliocene, and from then on, a series of tectonic activities, fluctuations in water levels, wave effects and their flows, and rivers, have shaped the present state of its morphology (NaderiBeni et al, 2014).…”

mentioning

confidence: 99%

“…The Caspian Basin, after separating from the open sea, became a lake at the time of Pliocene, and from then on, a series of tectonic activities, fluctuations in water levels, wave effects and their flows, and rivers, have shaped the present state of its morphology (NaderiBeni et al, 2014). Climate is the most important reason for changes in the water level of the Caspian Sea (Kroonenberg et al, 2007, NaderiBeni et al, 2013a, Leroy et al, 2013. These fluctuations at sea level have different impacts on costal evolution and relatively on coastal deposits (NaderiBeni et al, 2013b).…”

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confidence: 99%

Gradation and geochemistry of the Fenced Lagoon sediments (Bandar Anzali) with regard to source rock and tectonic location

Moghadam¹,

Rezaei²,

Solgi³

et al. 2020

Journ. Geol., Geogr., and Geoec..

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The location of the Fenced Lagoon in the urban basin of Bandar Anzali, which should be considered due to its impact on the lives of the people of the region in terms of the conservation of the wetland and its environmental issues, and, on the other hand, the potential of this area to be introduced as a geotourism center determine the need to investigate the area’s sedimentology and geochemistry. Therefore, to study sedimentary and geochemical properties of the Fenced Lagoon sediments located in Bandar Anzali, 33 samples were taken in the form of 6 cores and 12 grabs, and basic sedimentation tests and heavy metals measurement were carried out on them .Studies show that the sediments range from sand to clay in terms of gradation and have mainly coastal-river origin. The sediments of this lake are classified into four sedimentary types: Muddy Sand, Slightly Gravelly Muddy Sand, Sand and Slightly Gravelly Sand, and sand is the main component of all of these sediments. The most abundant sedimentary types belong to Muddy Sand and Sand and the least abundant sedimentary types belong to Slightly Gravelly Muddy Sand and Slightly Gravely Sand. The nature of the source rock is derived from acidic to intermediate combination and in general, sedimentary rocks of the area under study are within the continental arch islands and, to a lesser extent, the active continental margin.

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Precipitation and temperature of the southwest Caspian Sea region during the last 55 years: their trends and teleconnections with large‐scale atmospheric phenomena

Molavi-Arabshahi

Arpe

Leroy

2015

Intl Journal of Climatology

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Climate data from the southwest coast of the Caspian Sea (CS) were statistically analysed to find connections with large-scale atmospheric variabilities and regional impacts. The study area is characterized by a subtropical humid climate. This enclave of high precipitation is extremely important for Iranian food production and is recognized for its high biodiversity.The data sets were investigated for inconsistencies before carrying out the main investigations, and several problems have been identified. The results show three distinct climatic periods in the temperature time series since 1956: 1956 to 1975 with values near to the overall mean, 1977 to 1995 with values lower by 0.5 ∘ C and from 1996 to 2010 with values higher by 0.5 ∘ C. These periods can be positively correlated with rapid sea level changes of the CS. Moreover, an agreement exists between the three climatic periods and the North Atlantic Oscillation (NAO) variability. The sea surface temperature of the southern CS is shown to be the driving force of the 2 m temperatures in the study area. While temperature changes are in accordance with NAO variability, the precipitation variations show connections with ENSO and less with NAO. The trends of precipitation during the period are diverse but display mostly a weak decrease, while the trends of temperature display a clear increase, larger than that for global mean temperatures, overlaid with inter-decadal variations.

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Caspian sea-level changes during the last millennium: historical and geological evidence from the south Caspian Sea

Cited by 76 publications

References 57 publications

Multi-proxy indicators in a Pontocaspian system: a depth transect of surface sediment in the SE Caspian Sea

Multi-proxy indicators in a Pontocaspian system: a depth transect of surface sediment in the SE Caspian Sea

Gradation and geochemistry of the Fenced Lagoon sediments (Bandar Anzali) with regard to source rock and tectonic location

Precipitation and temperature of the southwest Caspian Sea region during the last 55 years: their trends and teleconnections with large‐scale atmospheric phenomena

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