Recent warming-induced changes in hydrology and sulfur cycling of permafrost in Lake Böön Tsagaan, Gobi Desert of Mongolia
Description
Due to recent warming since Little Ice Age, the sediment core was collected in Lake Boom Tsagaan, Gobi Desert of Mongolia and were investigated to understand the change in hydrological and biogeochemical processes of watershed in the southern edge of Siberian permafrost zone. A sediment core BTS02 (0.28 m) were collected at N45º36’19.5’’ and E99º12’28.9’’ in August 2014 using the gravity core sampler. The age of BTS02 core is 273 years based on the combined ages of excess 210Pb and 137Cs. Biogeochemical proxies were reconstructed by total organic carbon, total nitrogen, and total sulfur contents and the stable isotope compositions, analyzed with the isotope-ratio mass spectrometer. Median rain sizes of silicate fraction (fai) and dry bulk density were measured using a laser-reflection analyzer and pycnometer, respectively.
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Institutions
- Gifu UniversityGifu, Gifu