![Spheres Snow and Ice Edition Cover](images/snowIceCover-384.jpg)
Snow & Ice Issue 2011
![Permafrost carbon bomb](images/promosPermafrost.jpg)
Thawing frozen ground called permafrost threatens climate.
![Dust-covered snow taxes water](images/promosDustOnSnow.jpg)
Snow dusted with desert soil melts fast, Colorado River loses water.
![Safe from melting, for now](images/promosGlaciers.jpg)
Glaciers in the Nepal Himalaya are not melting over much of their area.
![Arctic Science and Inuit Knowledge](images/promosInuit.jpg)
Inuit forecasters help scientists understand climate changes.