2010 How Do We Know
How Do We Know: Tracking C02 Emissions
Scientist David Crisp explains how NASA tracks regional carbon dioxide (CO2) emissions from space.
How Do We Know: Thinning Sea Ice
NASA scientist Ron Kwok details new technology he is using to monitor how extensively Arctic sea ice is melting from below, a key indicator of the ice's long-term stability.
How Do We Know: Groundwater
NASA scientist Michael Watkins explains how satellites are used to monitor our changing global groundwater supplies.
How Do We Know: Salty Seas
Ocean salinity can have a big impact when it comes to changing climate. Learn how scientists are monitoring our salty seas.
How Do We Know: Proof in the Pixels
Dr. Heidi Cullen talks to Dr. John Townshend about his current research which tracks rainforest deforestation.
How Do We Know: Ocean Acidification
The atmosphere isn’t the only place carbon dioxide caused by human activity goes.
How Do We Know: Sea Level Rise
A warming planet could mean that sea levels rise three or more feet by the end of this century.
How Do We Know: Drought
How do we know when a region may be experiencing an early drought? Dr. Heidi Cullen talks to NASA scientist Molly Brown, who relies on sophisticated satellites for the answer.
