Subsurface temperature, particularly groundwater temperature, is an emerging indicator of environmental change. Climate change and urban heat are altering subsurface temperature regimes, including their long-term trends, spatial patterns, and seasonality. Yet subsurface temperatures remain largely “out of sight, out of mind”: observations are fragmented, monitoring approaches vary widely, and we still lack a comprehensive understanding of how subsurface temperatures are changing and what these changes mean.
This session brings together research on subsurface temperature monitoring, from soil and borehole measurements to groundwater temperature observations, as well as approaches for estimation, modelling, and prediction in both urban and rural environments. We also welcome studies investigating changes in subsurface temperature and seasonality and their consequences. Contributions may span spatial and temporal scales, from individual monitoring sites and urban environments to regional and global assessments. We particularly encourage work exploring both the challenges and opportunities associated with changing subsurface temperature regimes.