Results for: 2007
Coal Controversy In Appalachia
December 21, 2007In Appalachia, coal operators are removing the tops of mountains and burying hundreds of miles of streams with rock waste as they mine coal seams hundreds of feet below the mountain top. Read more
Observing Volcanoes, Satellite Thinks for Itself
December 6, 2007Satellite sensor technology automates volcanic observation, providing timely information about the eruption of Nyamuragira Volcano. Read more
Earth's Temperature Tracker
November 5, 2007NASA scientist James Hansen has tracked Earth's temperature for decades, and he is confident the global warming trend of 0.9 degrees Celsius observed since 1880 is mainly the result of human-produced greenhouse gases. Read more
Can Earth's Plants Keep up with Us?
September 26, 2007Studying human appropriation of net primary productivity helps predict the planet's ability to sustain the human population. Read more
Buzzing about Climate Change
September 7, 2007A Maryland beekeeper's annual records of honey production reveal that flowering trees are blooming nearly a month earlier than they did a few decades ago. Listen to the podcast by EarthSky. Read more
Greenland's Ice Island Alarm
August 27, 2007Global warming is shrinking the Greenland Ice Sheet by at least 150 billion metric tons a year. Read more
Science Blog - Expedition to Siberia
July 29, 2007As Earth's average temperature rises, and most rapidly in the high latitudes, what is happening to the great northern forests of Siberia? Join scientists from NASA and Russia's Academy of Science on an expedition down the Kochechum River in north-central Siberia as they go in search of answers. Read more
Satellite Monitors Rains that Trigger Landslides
June 8, 2007Researchers are developing a landslide early-warning system that uses space-based measurements of rainfall combined with a global risk map based on terrain, landcover, and soils. Read more
The Amazon's Seasonal Secret
May 31, 2007Satellite data detect previously unknown seasonal cycles in the leaf area of the Amazon Rainforest. Increasing leaf area during the sunny dry season may actually trigger the seasonal rains. Read more
Something Under the Ice is Moving
April 23, 2007Satellites measurements of ice sheet elevation reveal a complex network of subglacial lakes in Antarctica. As water flows from lake to lake, the ice sheet above them rises and falls. Read more
Tropical Deforestation
March 30, 2007Tropical forests are home to half the Earth's species, and their trees are an immense standing reservoir of carbon. Deforestation will have increasingly serious consequences for biodiversity, humans, and climate. Read more
Fire Alarms from Orbit
February 23, 2007NASA satellites are playing a key role in an alert system that notifies the South African electric company when potential outage-causing fires come near the power lines. Read more
Remote River Reconnaissance
February 9, 2007Elevation data collected from the space shuttle help map Earth's rivers in remote regions. Read more
Arctic Reflection: Clouds Replace Snow and Ice as Solar Reflector
January 31, 2007Using satellite observations of sea ice and clouds, scientists discover that Earth’s poles are still effective reflectors for incoming sunlight. Read more
Defining Desertification
January 3, 2007A string of dry years shriveled vegetation in Africa's Sahel, causing some to fear that the Sahara Desert was shifting south. Satellite data spanning more than twenty years now shows that the Sahel is holding its own against the Sahara and may be recovering with the return of near-normal rainfall. Read more
Browse Topics
World of Change
Satellite images showing how our world— forests, oceans,
cities, even the Sun— has changed in recent decades.
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Blue Marble
Composite satellite images of the entire Earth.
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Earth at Night
The night side of Earth twinkles with light in these composite global and regional views.
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Experiments
Hands-on educational activities.
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Visible Earth
A catalog of NASA images and animations of our home planet.
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NASA Earth Observations
View, download, and analyze imagery of Earth science data.
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NASA Global Climate Change
Vital signs of the planet.
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Earth Science Picture of the Day
Photos of Earth processes and phenomena.
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