From Gla­ciers to Rain­fall: Ten Years in the Andes

A weather station next to a field in the Rio Santa Valley Scientists at the University of Innsbruck have been studying the water cycle and glaciers in the Andes near Huaraz in northern Peru for a long time. They recently documented a previously unreported rainfall phenomenon. These light rainfalls, known locally as "Pushpa", mark the beginning of the sowing season. Their unpredictability from one year to the next complicates matters for farmers, a situation potentially worsened by climate change. In 2018, a group of students from the Universities of Innsbruck, Austria, and Hamburg, Germany, were on a research excursion close to the village of Llupa in the Rio Santa valley in the Peruvian Andes. While they were busy installing a weather station in preparation for their research project, they were surprised by unexpected rainfall-a brief yet notable shower. To the students, this seemed highly unusual.