Physical Geography

Physical geography focuses on geography as an Earth science (and is sometimes called Earth System Science).

Physical geography is a branch of geography that focuses on the study of the natural features and processes of the Earth’s surface. It includes the examination of landforms, climate, vegetation, soils, and water resources. Physical geographers use a range of scientific methods and tools to analyze and understand the complex interactions between the Earth’s physical systems.

Learn about the different branches of geography that fall under the physical geography category: climatology, geomorphology, biogeography, and more.

A view of a wetland with marshes on either side of a body of water.

Water on Earth

Caitlin Dempsey

Earth holds trillions of tons of water, mostly in oceans. Only 2.5% is freshwater, primarily found in glaciers, groundwater, lakes, and rivers.

Two world maps shaded in green for 10% and 30% forest area.

Defining How Much of the World is Covered by Forests

Caitlin Dempsey

With no universal definition, mapping and comparing forest coverage around the world is challenging.

A satellite image of a peninsula with a turquoise lake.

Glacial Flour Makes Some Lakes Turquoise

Caitlin Dempsey

Glacial flour, the fine dust created as glaciers move over land, turns lakes a turquoise color by reflecting blue and green light.

Map showing the NDVI anomaly in 2024 compared to average levels from 1991 to 2020). After a couple of years of above average precipitation in Southern California, vegetations levels in the summer of 2024 were 30% greener than average. Map: NASA, public domain.

Hydroclimate Whiplash: the Impact on California Wildfires

Caitlin Dempsey

Hydroclimate whiplash - the rapid swing between drought and heavy precipitation - plays a role in the increasing intensity of California wildfires.

Visualization by NASA showing the retreat of the Smith Glacier grounding line between 1996 and 2011.

Understanding Glacier Grounding Lines

Caitlin Dempsey

Grounding lines are the boundaries where glaciers and ice sheets transition from resting on solid ground to floating on seawater.

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