Abstract: The glaciers on Mt. Yulong, China (5596 m), are the southernmost in mainland Eurasia. The largest is Baishui No.1 Glacier. Up to 90% of the annual precipitation there falls in summer, when warm, moisture-rich air masses associated with the southwest monsoon reach the area from the Indian Ocean. The winter climate is influenced by air masses with a continental origin and by the southern branch of the westerlies. The snow which accumulates on Baishui No.1 Glacier includes marine aerosols associated with the summer monsoon, and dust brought from Central/West Asia, from Africa or from the Thar Desert area, in winter. Studies in May 2006 at two sites, one in the accumulation area (4900 m) and one in the ablation area (4750 m), revealed differences between the ionic composition of the snow which had accumulated in the 2005-06 winter and that of the snow which had been deposited during the preceding summer monsoon. Differences of the chemistry of the summer-accumulated snow at the two sites probably reflected local differences of ablation and elution rates, rather than differences of ion supplies. Differences of the chemistry of the winter-accumulated snow may reflect the influence of up-valley winds, which bring more crustal material to the lower site.