NSIDC's State of the Cryosphere provides an overview of the status of snow, ice, and permafrost as indicators of climate change.

This site provides time-series data for Northern Hemisphere snow cover, mountain glacier fluctuations, sea ice extent and concentration, changes in ice shelves, and global sea level. It also provides a snapshot of current permafrost conditions.

Introduction: Are global temperatures rising?

Northern Hemisphere Snow: What satellite sensors are telling us about snow cover

Glaciers: Mountain glacier fluctuations

Permafrost and Frozen Ground: Insights from a Northern Hemisphere map and field observations

Sea Ice: What satellite sensors are telling us about global sea ice extent and concentration

Ice Shelves: Rapid response to climate change

Sea Level: Is global sea level rising?

Scientific References

The Cryosphere at a Glance:
NSIDC images of current conditions

NSIDC Data via Google Earth
Download NSIDC data (KML file, 5.6 KB) for viewing NSIDC data in Google Earth (includes links to snow and ice, permafrost and glacier data sets). For details and instructions, see View NSIDC Data on Virtual Globes: Google Earth.

Cryospheric Climate Indicators in the Arctic
Cryospheric time series images characterize changes, while putting them in a spatial and historical context. For details, see Cryospheric Climate Indicators.

State of the Cryosphere reviews in Science
Volume 306, Issue 5700
Volume 288, Issue 5474
(subscription required)

		SITE CREDITS Project science lead: Richard L. Armstrong Additional science content: Mark Dyurgerov, James Maslanik, Mark Meier, Walt Meier, Ted Scambos, Mark Serreze, Julienne Stroeve, Tingjun Zhang
		Writing, editing, design: Kasey Barton, Nancy Geiger Wooten, Rachel Hauser, Kara Pharris, Michon Scott, Marijke Unger