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Update: Carbon Dioxide Concentration
March's global average concentration of atmospheric carbon dioxide was about 417 parts per million (ppm), a roughly 50% increase since 1750, due to human activities like burning fossil fuels and deforestation.
Update: Sea Level
Global average sea level has risen about 102 millimeters (about 4 inches) since 1993 as a result of human-caused global warming, with recent rates being unprecedented over the past 2,500-plus years. (For perspective, 102 mm, or 4 inches, of sea level rise is like covering the U.S. in about 16 feet (about 5 meters) of water.)
NASA Scientist Discovers New Means to Measure Snow Depth from Space
Inspired by how ants walk around their colonies, a NASA scientist is adding a new dimension to a satellite instrument that measures the height of Earth's ice sheets and sea ice.
Gravity Assist: Walking on Broken Ice, with Catherine Walker
An ice shelf collapsed in East Antarctica in March 2022, concerning scientists who track melting glaciers, sea level rise, and other effects of climate change. Catherine Walker, a visiting scientist at NASA’s Goddard Space Flight Center, uses NASA satellite data to better understand these events. Listen to the podcast or read the transcript to learn more.
Images of Change: Shrinking Lakes on Iberian Peninsula
A drought on the Iberian Peninsula, from November 2021 to at least February 2022, has had a profound effect on the area's lakes. The view from space shows the Alto Rabagao Reservoir and a smaller lake, both in northern Portugal, before and after the drought took hold.
Images of Change: Floods in Iran
Following drought in 2021, the first week of 2022 brought a series of rain- and snowstorms to southern Iran that overwhelmed rivers and caused widespread flooding. Satellite images show the area before and after the storms.
Images of Change: East Antarctica Ice Shelf Collapses
Ice shelves (large protrusions of ice that float on the water) can survive for thousands of years, helping to keep the landbound glaciers behind them in place. But Antarctica's Conger ice shelf has collapsed. Find out why this event was noteworthy to scientists.
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