Holocene Paleoenvironmental Implications of Diatom, Non-Pollen Palynomorph, and Organic Carbon Records from the Kandalaksha Bay of the White Sea (European Arctic)
oleh: Yelena Polyakova, Elizaveta Agafonova, Ekaterina Novichkova, Anne de Vernal
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2023-02-01 |
Deskripsi
Variations in sea surface conditions and sea level through the Holocene in the Kandalaksha Bay, the White Sea, were reconstructed based on the study of core sediments from the outer Kandalaksha Bay, using the modern analog technique applied to dinocysts in addition to diatoms, TOC, δ<sup>13</sup>C<sub>org</sub>, CaCO<sub>3</sub>, and grain size data. The chronostratigraphy of the core sediments was defined from accelerator mass spectrometry <sup>14</sup>C dates on mollusk shells. The results indicated an increase in water depth in the outer Kandalaksha Bay and in the central Dvina Bay until the late Holocene. From about 9.5 to 7.5 cal kyr BP, the data suggested a general trend of increasing sea surface temperatures (up to 14 °C), at least in areas with inflow of Atlantic waters. The last 2.5 kyr were characterized by increased freshwater runoff to the White Sea.