FIGURE 4

Seasonal time series of snow cover over Eurasia and North America (Greenland is excluded).

of integrating satellite and integrative products with earlier in situ observations must also be improved to provide the longest, most consistent records possible.

With adequate data available to analyze, knowledge of the spatial and temporal kinematics of snow cover over recent decades or even the past century will continue to improve. This will contribute to a better understanding of the role of snow in the climate system and to the utility of snow as an indicator of climate change.

ACKNOWLEDGMENTS

Thanks to G. Stevens at NOAA for supplying digital snow data and to A. Chang at NASA for providing microwave data. Thanks also to A. Frei, M. Hughes, and J. Wright at Rutgers for technical assistance. This work is supported by NOAA under grant NA90AA-D-AC518, and by the Geography and Regional Science Program of the National Science Foundation under Grant SES-9011869.



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