Effects of re-oligotrophication and climate change on lake thermal structure

Summary During recent decades, climate change and re‐oligotrophication have been affecting many lakes. Most long‐term research focuses on large North American and northern European lakes, but climate forcing south of the Alps seems to be different. Furthermore, lake restoration frequently involves smaller lakes (50% of lake volume), while deeper mixing released accumulated heat from the previous season and earlier stratification trapped colder water in the hypolimnion. We suggest that these combined effects resulted in a decrease in hypolimnetic temperature. Our study indicated that re‐oligotrophication mitigated the effects of c