The next event in the PhDTalks series will take place on Tuesday, November 19 in the Grandori Room (Building 4) from 5:15 pm to 6:30 pm CET.

PhDTalks is a series of seminars and discussions among PhD students, aiming to provide a space for networking and connecting with the various projects developed within our department.

Xu Han will be the speaker, presenting a seminar entitled “A downscaling method based on wet spell and analysis of future climate variation under CMIP6 Scenarios in the Upper Yangtze River Basin, China.“

A light refreshment, funded by the department, will be available at the end of the event.

It will also be possible to attend the conference online at the following link.

Abstract

According to recent studies, the past decade was the hottest on record, and climate change is speeding up. As the largest basin, and the primary source of hydropower in China, the impact of climate change on the Upper Yangtze river Basin (UYRB) is particularly crucial. We downscaled GCMs’ outputs of precipitation (wet/dry spells considered to reduce GCMS wet days overestimation) and temperature projections (2024-2100), under four typical Shared Socioeconomic Pathways (SSPs), and we pursued a trend analysis on these potential future climate projections. We found significant trends of precipitation in all months, unless for August, across all socioeconomic pathways. This could lead to future heatwaves, and droughts. Additionally, for SSP370 and SSP585, there were no significant trends of precipitation in December, but there were significant upward trends in temperature. This may result in drier winters than now, increased potential evapotranspiration, and reduced surface (snow) water storage, impacting water resources availability. Consecutive dry/wet days at station, and basin scale show spatial-temporal heterogeneity, but generally wet spells are longer, and dry spells shorten moving from S-E to N-W. In addition, we carried out a comprehensive evaluation of past (1980-2014) monthly, and annual climate output of chosen models.

Speaker’s bio

My name is Xu Han, my hometown is in Handan, northern China, not far from Beijing. I came to Italy to study in 2021. My research is mainly related to meteorology and hydrology, specifically climate change, model evaluation, downscaling methods, extreme weather, etc.

I like traveling, music, movies, running