For over 20 years NASA has been tracking the global surface topography of the ocean to understand the important role it plays in our daily lives. Climate change is causing our ocean to warm and glaciers to melt, resulting in sea level rise. Since 1880, the global sea level has risen 8 inches; by 2100, it is projected to rise another 1 to 4 feet. More about sea level: http://climate.nasa.gov/vital-signs/sea-level/ http://sealevel.nasa.gov More 'NASA's Earth Minute' videos: http://climate.nasa.gov

Clouds are the largest variable controlling Earth’s atmospheric temperature and climate. Any change in global cloud cover may contribute to long-term changes in Earth’s climate. Help monitor those changes — go outside with the GLOBE Observer app to make your own observations and share them with fellow citizen scientists as well as NASA researchers: http://observer.globe.gov/. | NASA Climate Change