GEOGRAPHY & GEOGRAPHIC INFORMATION SCIENCE RIVERS, WATERSHEDS, SEDIMENTARY PROCESSES & LANDSCAPES PALEOCLIMATE, CLIMATE & CLIMATE CHANGE EARTH SYSTEMS MODELING REMOTE SENSING AEROSOL, CLOUDS, PRECIPITATION & CLOUD-RADIATIVE PROCESSES ENVIRONMENTAL STUDIES & POLICY ATMOSPHERIC CHEMISTRY, GEOCHEMISTRY & EARTH MATERIALS GEOPHYSICS, GEODYNAMICS, AND TECTONICS GEOMICROBIOLOGY, GEOBIOLOGY & PALEOBIOLOGY HEALTH GEOGRAPHY NATURAL HAZARDS URBAN & POLITICAL GEOGRAPHY WATER IN THE EARTH SYSTEM