Arctic Ice Loss Threatens National Security: A Path Forward.

Global warming is causing a dramatic reduction in Arctic sea and land ice and thawing permafrost. Because of the Arctic's role in influencing climate, loss of Arctic ice is affecting weather patterns globally and in the Northern Hemisphere in particular. Events such as droughts and coastal flooding, exacerbated by global warming, result in food and water shortages and mass human migrations that can destabilize governments and threaten U.

Enhancing the Applicability of Satellite Remote Sensing for PM2.5 Estimation Using MODIS Deep Blue AOD and Land Use Regression in California, United States.

We estimated daily ground-level PM2.5 concentrations combining Collection 6 deep blue (DB) Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) data (10 km resolution) with land use regression in California, United States, for the period 2006-2012. The Collection 6 DB method for AOD provided more reliable data retrievals over California's bright surface areas than previous data sets.