Results for: 2007

Coal Controversy In Appalachia

Coal Controversy In Appalachia

In 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

Observing Volcanoes, Satellite Thinks for Itself

Satellite sensor technology automates volcanic observation, providing timely information about the eruption of Nyamuragira Volcano. Read more

Earth's Temperature Tracker

Earth's Temperature Tracker

NASA 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?

Can Earth's Plants Keep up with Us?

Studying human appropriation of net primary productivity helps predict the planet's ability to sustain the human population. Read more

Buzzing about Climate Change

Buzzing about Climate Change

A 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

Greenland's Ice Island Alarm

Global warming is shrinking the Greenland Ice Sheet by at least 150 billion metric tons a year. Read more

Science Blog - Expedition to Siberia

Science Blog - Expedition to Siberia

As 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

Satellite Monitors Rains that Trigger Landslides

Researchers 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

The Amazon's Seasonal Secret

Satellite 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

Something Under the Ice is Moving

Satellites 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

Tropical Deforestation

Tropical 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

Fire Alarms from Orbit

NASA 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

Remote River Reconnaissance

Elevation 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

Arctic Reflection: Clouds Replace Snow and Ice as Solar Reflector

Using satellite observations of sea ice and clouds, scientists discover that Earth’s poles are still effective reflectors for incoming sunlight. Read more

Defining Desertification

Defining Desertification

A 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

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Satellite images showing how our world— forests, oceans, cities, even the Sun— has changed in recent decades.
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A catalog of NASA images and animations of our home planet.
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Vital signs of the planet.
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