We're on it. Our planet is changing. Through the gradual build-up of more greenhouse gases in the atmosphere, Earth is warming. As Earth warms, ocean waters expand and ice melts to make sea levels rise. Click here to see how your planet is changing. EARTH IMAGES from the JPL Photojournal NASA Spacecraft Sees Stark Effects of California Drought on Agriculture Stark effects of a California drought on agriculture can be seen clearly in these two February images acquired by NASA's Landsat 8 in 2014 (left) and NASA's Terra spacecraft in 2003 (right). Read more | | More Earth images Explore Earth satellites in 3D "Eyes on the Earth" is a 3-D visualization experience that lets users "fly along" with NASA's fleet of Earth science missions and observe climate data from a global perspective in an immersive, real-time environment.
View interactive Earth Observing Missions CloudSat Revealing the inner secrets of clouds. › Mission home page. Earth From Space. Earth From Space PBS Airdate: February 13, 2013 NARRATOR: Our planet: Earth—you may think you know it well, but a startling new picture is emerging of a world shaped by forces more dynamic and intertwined than we ever imagined, raising possibilities that defy common sense.
How can sandstorms in the Sahara Desert transform the Amazon rainforest, over 5,000 miles away? In the frigid ocean beneath Antarctica, how can a vast undersea waterfall, 500 times bigger than Niagara Falls, lead to a gigantic feeding frenzy near the equator? And how can warm water, streaming past the coast of Africa, trigger a weather catastrophe, half a world away, in the southern United States? Scientists have begun to find surprising answers to these and other profound questions, thanks to a network of satellites, orbiting high above the earth. EMILY SHUCKBURGH ( British Antarctic Survey): It’s really the last bastion of human discovery.
NARRATOR: What are these hidden forces that rule our world? Climate Change, Deforestation, Biomes and Ocean Currents, Plankton, Endangered Species - Earth Web Site. Click for more detail Thermohaline Change Evidence is growing that the thermohaline current may be slowed or stopped by cold fresh water inputs to the Arctic and North Atlantic oceans.
This could occur if global warming is sufficient to cause large scale melting of arctic sea ice and the Greenland ice sheet. Such a change in the current may be gradual (over centuries) or very rapid (over a few years). Either would cause planet wide changes in climate. This effect may be part of what starts and stops the ice ages. "Diatoms (a kind of phytoplankton) are estimated to "scrub" roughly as much CO2 from the atmosphere each year as all the world's rainforests.
"Net primary productivity is the mass of plant material produced each year on land and in the oceans by photosynthesis using energy from sunlight. Biodiversity is the variety of life found at all levels of biological organization, ranging from individuals and populations to species, communities and ecosystems. Click for more detail. Global Maps.
Persistent organic pollutant. RealClimate.