Videos Section

How Do We Know: Hunting Hurricanes Watch Video

How Do We Know: Hunting Hurricanes

National Hurricane Center scientist Jack Beven explains the technology used to forecast and track hurricanes as they happen.

How Do We Know: Tracking Tornadoes Watch Video

How Do We Know: Tracking Tornadoes

How do we know when a tornado is forming? Scientist Harold Brooks explains how Doppler radars are used to track storm formation.

How Do We Know: Shrinking Arctic Sea Ice Watch Video

How Do We Know: Shrinking Arctic Sea Ice

Learn how NASA scientists are tracking the melting Arctic sea ice and what less ice means for global warming in the future.

How Do We Know: Hurricane Hunting Watch Video

How Do We Know: Hurricane Hunting

National Hurricane Center scientist Jack Beven explains the technology used to forecast and track potential hurricanes as they happen.

How Do We Know: Tracking C02 Emissions Watch Video

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 Watch Video

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 Watch Video

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 Watch Video

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.