报告题目一：Chemical responses of small lakes to atmospheric and catchment drivers over four decades

报告人：Lauri Arvola教授（赫尔辛基大学）

报告时间：2024年11月12日（周二）晚上18:00-19:30

报告地点：科技楼三楼报告厅

报告题目二：Water quality monitoring of Finnish inland waters: 50 years perspective.

报告人：Lauri Arvola教授（赫尔辛基大学）

报告时间：2024年11月12日（周二）晚上19:30-21:00

报告地点：科技楼三楼报告厅

报告一摘要：

Since the end of the 1980s, extensive lake and river water browning has been reported across Europe and North America, a phenomenon often interpreted as a result of recovery from acidification, and warmer and wetter climate as well as changes in land-use.This talk addresses the following questions:

• Does browning progress uniformly in the studied lakes as several previous studies have indicated?

• Have base cation concentrations decreased as changes in their deposition suggest?

• And finally, is the acidification still proceeding, or do the lakes indicate any chemical recovery from acidification as some recent results from North America and northern Europe suggest?

报告二摘要：

Agriculture is nowadays mostly responsible for P and N loading, but forestry seems to be almost as important source as agriculture is important to focus on diffuse loading and erosion; P concentrations have shown decreasing trends but N concentrations have usually increased; Climate warming has already modified conditions which need to consider in monitoring and water management (e.g. browning of surface waters); Other chemicals such as heavy metals, medicines, pesticides, herbicides, pathogens and micro- and nanoscale plastic particles have to be monitored as well, which is a challenging task for monitoring.

个人简介：

Lauri Arvola，赫尔辛基大学教授，芬兰水质监测中心专家委员会主席，芬兰湖泊学会主席，芬兰环境中心委员，获芬兰文化基金终身成就奖。发表论文、参编著作149篇，论文总引用数7343，H指数48。