Arctic Hydrological Regime Shift in a Warming Climate, Svalbard 78°02′42″N 13°48′36″E / 78.045°N 13.810°E, Lake Linnevatnet, covering the last ~2000 years (collected 2019-2023) ...

• Main Authors: Lapointe, François, Bradley, Raymond, Retelle, Michael
• Format: Dataset
• Language: English
• Published: NSF Arctic Data Center 2023
• Subjects: Linnévatnet, Linnébreen, LOI, grain-size, Calcium, Carbonates, temperature, precipitation, global warming; Arctic; Linnébreen; Linnéelva; Linnévatnet; Svalbard; glacier; Global warming; Magnetic susceptibility; Spitsbergen
• Online Access: https://dx.doi.org/10.18739/a2qr4ns2x; https://arcticdata.io/catalog/view/doi:10.18739/A2QR4NS2X

In this study, we delve into a newly constructed composite sedimentary sequence obtained from Linnévatnet in western Spitsbergen, covering approximately the last ~2,000 years. Micro-X-ray fluorescence (μ-XRF) results show that calcium constitutes the major component of sediment deposited in the delta-proximal basin, where the sedimentary record was obtained. Percentage of organic material, as determined through loss-on-ignition measurements, exhibits an inverse relationship with calcium and magnetic susceptibility. This implies that the sediment input at the core site is mainly influenced by the alternation of calcium sourced from the carbonates on the eastern valley slopes and coal-bearing sandstone from Linnéelva, which originates from the central valley's main river inflow. Linnéelva primarily receives its water from the snow and glacier meltwaters of Linnébreen, a small valley glacier situated 7 kilometers south of Linnévatnet. Since Linnébreen is underlain by coal-bearing sandstone, the organic content ...