Bryan Mark is interested in climate-glacier-hydrologic dynamics over different time scales, with a particular focus on the coupled human-natural systems of water resources of the tropical Andes.  His Glacier Environmental Change research group affiliated with the Byrd Polar Research Center addresses physical and human dimensions of environmental change in glacierized landscapes in sites all along the American Cordillera, as well as Africa and Asia. They collaborate with researchers in different institutions internationally, and use multiple methods from paleoclimatology, geomorphology, embedded instrumentation, hydrology, GIS, remote sensing, and biogeochemistry.