China claims to have created first artificial snowfall

Chinese weather experts claim to have triggered the first artificial snow showers by releasing tiny particles into clouds over the Tibetan plateau.

The experiment was hailed as a success for the drought-stricken region, where freshwater lakes are drying up as warmer temperatures force thousands of glaciers into rapid retreat.

A spokesman for the Tibet meteorological office said artificial snowfall was created by seeding the clouds with particles of silver iodide. The fine particles encourage the formation of ice crystals in the clouds, which grow until they fall as snowflakes.

The state news agency, Xinhau, said the snow reached a depth of 1cm and accumulated on the Qinghai-Tibetan plateau, which feeds the Yangtze river. The experiment proves it is "possible to change the weather through human efforts on the world's highest plateau", Yu Zhongshui, an engineer with the Tibet meteorological office, told Xinhau. "To launch artificial precipitation can help alleviate drought on the grassland in northern Tibet."

Many weather experts doubt the effectiveness of cloud seeding, in part because it is impossible to prove a cloud would not have shed snow or rain without being seeded.