Climate and ice conditions of East Siberian Sea during Holocene: Reconstructions based on sedimentary geochemical multiproxy ...

• Main Authors: Astakhov, Anatolii S, Babich, Valeriy V, Shi, Xuefa, Hu, Limin, Obrezkova, Maria S, Aksentov, Kirill I, Alatortsev, Alexander V, Darin, Andrey V, Kalugin, Ivan A, Karnaukh, Viktor N, Melgunov, Mikhail S
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: SAGE Journals 2022
• Subjects: Geography; History; East Siberian Sea
• Online Access: https://dx.doi.org/10.25384/sage.c.6255828.v1; https://sage.figshare.com/collections/Climate_and_ice_conditions_of_East_Siberian_Sea_during_Holocene_Reconstructions_based_on_sedimentary_geochemical_multiproxy/6255828/1

Reconstruction of ice conditions and climate of the East Siberian Sea during the Late Middle Holocene was implemented for the first time using a transfer function method based on marine sedimentation proxies. Transfer functions were developed based on a hydrometeorological time series of changes in mean annual air temperature (ΔT 10 ) and the ice-free period (IF 10 ) for the last 70–90 years and a geochemical time series of bottom sediments accumulated during this time, which were obtained using a submillimeter scanning of the core in the X-ray fluorescence analysis of synchrotron radiation. Geochemical time series of Holocene deposits were obtained from X-ray fluorescence analysis of the core in a step of 1–2 cm. Reconstruction of ice conditions and average annual air temperature revealed a decreasing trend of ΔT 10 and IF 10 , which started from the middle Holocene up to the Little Ice Age due to an orbitally determined decrease in insolation. A synchronous periodicity of changes in ice cover and air ...