![A wind-blown snow drift in the mountains](https://eesa.lbl.gov/wp-content/uploads/sites/2/2023/10/BLDS_Med_890x790_DSC02321.jpg)
The Climate Sciences Department’s research capabilities lie in three areas: (1) modeling climate change and climate change solutions; (2) simulating clouds, rain, and the water cycle; (3) measuring and modeling the terrestrial carbon cycle.
![A beautiful mountain meadow surrounded by aspens, with distant peaks in the background](https://eesa.lbl.gov/wp-content/uploads/sites/2/2023/10/BLDS_Med_890x790DSC05645.jpg)
The Ecology Department’s scientists and engineers provide biogeochemistry, microbial ecology, and environmental engineering expertise within EESA, and develop technologies to address challenges related to environment, energy, and health.
![A close up of a finger pointing at a puddle of water that has an iridescent mineral sheen on the surface](https://eesa.lbl.gov/wp-content/uploads/sites/2/2023/10/BLDS_Med_890x790_DSC06358.jpg)
The Geochemistry Department has expertise in isotopic geochemistry, reactive transport modeling, molecular and nanogeochemistry, as well as high-temperature geochemistry, biogeochemical cycling, and water quality.
![A pair of boots stand next to a crack in concrete](https://eesa.lbl.gov/wp-content/uploads/sites/2/2023/10/BLDS_Med_890x790_DSC07625.jpg)
The Geophysics Department is organized into five scientific core capabilities to advance the science for extracting subsurface properties and process-related information from geophysical, geomechanical, fluid-flow, and satellite data.
![A bursting bubble in a volcanic mudpot](https://eesa.lbl.gov/wp-content/uploads/sites/2/2023/10/BLDS_Med_890x790_DSC00659.jpg)
The Hydrogeology Department has expertise in theoretical, experimental, field, and modeling approaches in research areas including: advanced modeling; reservoir engineering; vadose-zone and fracture hydrology; contaminant hydrology; and coupled nonisothermal, geochemical, and geomechanical processes.