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.

Pahoehoe from Kilauea eruption, 1989.

Pacific Ring of Fire

Julian Marks

The Ring of Fire refers to theย long chain of volcanoes and earthquake zonesย that encircleย much of the Pacific Ocean.

Cover of Michael Hannah's bookย "Extinctions:ย ย Living and Dying in the Margin of Error".

Review | Extinctions: Living and Dying in the Margin of Error

G.T. Dempsey

This book sets out, in some nine chapters, both the โ€˜turbulentโ€™ journey of that one species living 3.7 billion years ago to the 8.7 million today and the human activity threatening that biodiversity.

The current US Exclusive Economic Zone is delineated by yellow outlines. As of January 2021, 53 percent of the United States' ocean, coastal, and Great Lakes waterways were unmapped. Map: NOAA Integrated Ocean and Coastal Mapping.

53% of U.S. Ocean, Coastal, and Great Lakes Waters are Unmapped

Caitlin Dempsey

According to a new report by the United States' federal Interagency Working Group on Ocean Coastal Mapping, 53 percent of the country's ocean, coastal, and Great Lakes water is still unmapped.

One source of uranium and radon in the Denver Basin aquifer system is sediments from the Pikes Peak granite, which have been weathering for millions of years.

Geology Quick Facts for Each U.S. State

Caitlin Dempsey

Listed here are the official state rock, gemstone, mineral, and fossil for each U.S. State.

Hurricane Ida just before landfall on the Louisiana coast on Aug. 29, 2021. NOAA.

How Did Ida Turn Into Such a Strong Hurricane?

Geo Contributor

Oceanographer Nick Shay explains how eddies, part of whatโ€™s known as the Loop Current, help storms rapidly intensify into monster hurricanes.

Hurricane Ida just before landfall on the Louisiana coast on Aug. 29, 2021. NOAA.

4 Things to Learn About Hurricane Ida

Geo Contributor

These four resources explain why the New Orleans area is at high risk for severe hurricanes and what role climate change plays in these devastating storms.

Wildlife corridor for herpetofauna.

Introduction to Wildlife Corridors

Elizabeth Borneman

Wildlife corridors are overpasses and underpasses that connect natural regions and provide safe transit for migratory animals through human infrastructure.

For a few weeks during the spring months in the Gulf of Carpentaria in Australia, Morning Glory cloud formations can be seen. Map showing the location of the Gulf of Carpentaria in Australia. Map: Equal Earth Physical Map, public domain.

These Clouds Only Predictably Form in Australia

Caitlin Dempsey

Morning Glory clouds are a unique and rare cloud formation only predictably seen in the Gulf of Carpentaria in Australia during spring.

Crow siting on a chain link fence.

The Growth of Crows in Cities

Katarina Samuroviฤ‡

Since the 1960s, more and moreย crows have been abandoningย their rural winter roosts in favor of cities and towns.

Cover of the book, "Drought, Flood, Fire: How Climate Change Contributes to Catastrophes."

Review | Drought, Flood, Fire: How Climate Change Contributes to Catastrophes

G.T. Dempsey

"Drought, Flood, Fire: How Climate Change Contributes to Catastrophes" is written by a scientist who understands how to meaningfully inform his non-scientist readers.ย ย 

Tufted Titmouse (Baeolophus bicolor). Photo: National Park Service, Public domain.

Kleptotrichy: Birds Who Steal Fur

Caitlin Dempsey

Scientists recently released their findings on why birds pull fur from animals, which is a potentially risky behavior.

Satellite image showing the McKay Creek fire (left) and the Sparks Lake fire (right) on June 20, 2021 in British Columbia, Canada.

2021 Wildfires in the U.S. and Canada

Caitlin Dempsey

Climate change is causing wildfires to burn longer and more frequently in some northern latitudes.

Radar image showing the North American Monsoon over the interior Southwest.

North American Monsoon

Julian Marks

The North American Monsoon is a pattern of increased rainfall that occurs across much of the southwestern USA and northern Mexico, often commencing in July and ending in September.ย 

A bison cow with her calf. Photo: Jesse Achtenberg, U.S. Fish and Wildlife Service. Public domain

Geography of American Bison

Caitlin Dempsey

Learn about the American Bison, which once roamed North America in large herds.

Set of maps illustrating how researchers used deep learning to map trees in West Africa.

Mapping Trees in West Africa

Mark Altaweel

Researchers used high resolution satellite imagery and machine learning to map trees in West Africa.

Aerial view of the Shawnee Reservoir in Oklahoma.

Geography of Oklahoma

Marques Hayes

Oklahoma has a diverse geography.

Side by side satellite images showing the water level in Lake Oroville between June 2019 (left) and June 2021 (right).

California’s Drought is Driving Reservoirs to Near Historic Lows in 2021

Caitlin Dempsey

The second year of California's drought is driving down water levels in the state's reservoirs in 2021.

McKinley Lake near Cordova, Alaska

Geography of U.S. Lakes

Elizabeth Borneman

Within its borders, the United States is home to a vast wealth of lakes.

Ocotillo (left) and saguaro (right) are two plants found in the Sonoran Desert. Photo: National Park Service/Alice Wondrak Biel, Saguaro National Park, Public domain.

The Sonoran Desert is Losing Plants Due to Climate Change

Caitlin Dempsey

Between 1984 and 2017, a team of researchers utilized Landsat imagery to examine changes in vegetation in the Colorado Desert in Southern California.

This photo from the International Space Station shows the location of Salton Sea between Imperial and Coachella Valleys. Image; NASA, June 12, 2002

California’s Largest Lake

Caitlin Dempsey

Floodwater from a broken irrigation canal gate in 1905 created California's largest lake.

Cropped Equal Earth map showing the location of the state of Alaska. Source: Equal Earth Political Map, public domain.

Alaska’s Coastline is Longer Than All the Other 49 States Combined

Caitlin Dempsey

Here are some geography facts about Alaska's coastlines.

Map showing the world's ocean gyres. Source: NOAA.

How Ocean Currents Move Pollution Around the World

Katarina Samuroviฤ‡

How does pollution from plastic, trash, and oil spills move around Earth's oceans?

Night sky view of the Milky Way rising above the snow-capped peaks of Rocky Mountain National Park, Colorado.

Geography Facts About the Rocky Mountains

Caitlin Dempsey

The Rocky Mountains form the longest mountain range in North America. Here are some geography facts about this mountain range.

Map showing the predicted trajectory of post-tropical storm Ana. Source: NOAA

Storms of the 2021 Hurricane Season

Caitlin Dempsey

While the official 2021 hurricane season officially lasts from June 1 to November 30, 2021, the first storm of the season has already happened.

View southwest of Garfield Peak and Eagle Crags above Chaski Bay, Crater Lake. Photo: Charles Bacon, USGS, public domain.

NASA Completes the First Global Survey of Fluctuations in Lakes and Reservoirs

Katarina Samuroviฤ‡

ICESat-2 launched in September 2018) with its satellite laser altimeter, allowing NASA to perform the first global survey of freshwater fluctuations.

Miners Castle, Lake Superior.

Geography of Lake Superior

Marques Hayes

Lake Superior is the world's largest freshwater lake.

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