Assessing atmospheric and oceanic teleconnections between the eastern and western Mediterranean over the past 8000 years
Bibliographic Data
| ID | 12266065 |
|---|---|
| Authors | Sandrine Le Houëdec (0000-0002-4938-5613, Department of Earth Sciences, University of Geneva, Switzerland, corresponding author), Diederik Liebrand (0000-0002-6925-7889, British Ocean Sediment Core Research Facility (BOSCORF), National Oceanography Centre, Southampton, UK), Rick Hennekam (0000-0002-8823-4519, Department of Ocean Systems, NIOZ Royal Netherlands Institute for Sea Research, The Netherlands), Meryem Mojtahid (0000-0002-7000-4002, Univ Angers, Nantes Université, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, France) |
| Year | 2023 |
| Volume | 34 |
| Issue | 2 |
| Pages | 162-174 |
| Publication date | 2023-11-29 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1177/09596836231211807 |
| OpenAlex | W4389203436 |
| Language | EN |
| References cited | 76 |
Holocene climate records from the Mediterranean are marked by pervasive millennial to centennial-scale climate variability. Here, we investigate East-West Mediterranean atmospheric and oceanic teleconnections by computing phase-relationships between oxygen isotope (δ 18 O) records generated on Soreq (East) and Chorchia (West) spelaeothems, as well as between δ 18 O and carbon isotope (δ 13 C) records from planktonic and benthic foraminifera from core PS009PC (East, Levantin Basin), ODP Site 963D (Central, Sicily Strait), and core KESC9-14 (West, Ligurian Basin). These marine sites are all located at intermediate water depths (560–460 m depth). Hence, the benthic foraminiferal δ 18 O records reflect mainly the intermediate ocean temperature/δ 18 O of the water mass, and the benthic δ 13 C is a proxy for the intensity of water flowing at the studied depth called Levantine Intermediate Water (LIW). For both western and eastern cores, the planktonic stable isotopic records reflect the climate-induced activity of the nearby river system. We find broadly in-phase relationships between the spelaeothem δ 18 O records and between the planktonic δ 18 O and δ 13 C records at most multi-centennial and millennial periodicities. This is indicative of closely linked (hydro-) climatic conditions in Southern Europe, the Levant, and North Africa over the last 8000 years. Conversely, at intermediate water depths, we find a distinct out-of-phase relationship between the East/Central and West Mediterranean benthic δ 18 O and δ 13 C records at 1000–2000 years periodicities. We interpret this see-saw pattern as indicative of a persistent regional influence of LIW on oceanographic conditions in the intermediate depths of the eastern basin. Conversely, we suggest a strong influence of the modified Atlantic Ocean inflow (MAW) in the intermediate water formation in the Western Mediterranean (‘Winter Intermediate Water’; WIW). This WIW overprints, at least partially, the LIW signal that reaches the western Mediterranean causing the out-of-phase relationship between the east and the west oceanographic signals at intermediate depths
Archaeology · Benthic zone · Climatology · El Niño Southern Oscillation · Foraminifera · Geography · Holocene · Mediterranean climate · Mediterranean sea · Plankton · Teleconnection · Water mass · Archaeology and ancient environmental studies · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Geology · Oceanography
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| Highly cited | No |
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