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Knowledge of peatland dynamics and its response to the intensity of the Indian summer monsoon (ISM) is crucial to predict the future fate of the peatlands in the southwestern China under climate warming scenarios. In this study, we obtained a sediment core from the Napahai wetland in southwestern China and analyzed geochemical indices, including loss on ignition at 550 °C, carbonate content, as well as magnetic susceptibility, and ash-free bulk density, to investigate the peatland development since the last deglaciation. Results show that peat formation at ca. 13.3 cal. kyr BP in the Napahai wetland was likely attributed to climate warming during the Bølling-Allerød period. The results clearly suggest the peat continuously accumulated from 13.3 to 7.2 cal. kyr BP and weakened from the Middle to Late Holocene (7.2–1.5 cal. kyr BP), indicating notably wet conditions during the Early to Middle Holocene (11.8–7.2 cal. kyr BP) and a clear long-term drying trend in the Middle to Late Holocene. A comparison of the Napahai records with other monsoon intensity and related hydroclimatic records in areas dominated by the ISM suggests that the development of the Napahai peatland at orbital–suborbital timescales corresponded to the variations in the ISM intensity and the summer insolation. • Napahai peatland initiated at ~13.3 cal kyr BP. • Napahai peat evolution at orbital timescale corresponded to Holocene ISM variations. • Records suggest a humid Early Holocene and a drying trend during Mid- to Late Holocene. [ABSTRACT FROM AUTHOR]

The Keda Torus eXperiment (KTX) is a medium-sized reversed field pinch (RFP) device under construction at the University of Science and Technology of China. The KTX has a major radius of 1.4 m and a minor radius of 0.4 m with an Ohmic discharge current up to 1 MA. The expected electron density and temperature are, respectively, 2 × 1019 m−3 and 800 eV. A combination of a stainless steel vacuum chamber and a thin copper shell (with a penetration time of 20 ms) surrounding the plasma provides an opportunity for studying resistive wall mode instabilities. The unique double-C design of the KTX vacuum vessel allows access to the interior of the KTX for easy first-wall modifications and investigations of power and particle handling, a largely unexplored territory in RFP research leading to demonstration of the fusion potential of the RFP concept. An active feedback mode control system is designed and will be implemented in the second phase of the KTX program. The recent progress of this program will be presented, including the design of the vacuum vessel, magnet systems and power supplies. [ABSTRACT FROM AUTHOR]