>32 μm% (GS32) dataset of Holocene and modern surface sediments in Lake Ximenglongtan, southwestern China.

This dataset includes >32 μm% (GS32) data of Holocene and modern surface sediments in Lake Ximenglongtan, southwestern China. The grain size of sediments was measured by the Malvern Mastersizer 3000 laser particle sizer. Before measurement, the organic matter and carbonates in samples are removed using H2O2 and HCl, respectively. All the samples were dispersed in an ultrasonic bath for 15 min after the addition of (NaPO3)6. Each sample was measured three times and the three results needed to be highly similar to be considered qualified. A final average value of three times was obtained to reduce the measurement errors. The GS32 in the lake center area is a sensitive proxy of low lake-level change and is also used to reconstruct the lake-level change across the Holocene in Lake Ximenglongtan, northeastern South Asian monsoon region.