| Red and blue shades indicate regions of statistically significant trends with a confidence level of 95%. Positive trends dominate over North America, with especially strong and widespread trends over Canada and Alaska. There are also strong positive trends over Scandinavia during spring and over Britain and much of north-central Europe during fall (not shown here). Trends are generally weaker and not as widespread over Asia, where in situ meteorological observations are much
less dense. Credit: P.A. Dirmeyer and K.L. Brubaker, Center for
Ocean-Land-Atmosphere Studies and the University of Maryland (reproduced from Geophysical Research Letters with permission from the American Geophysical Union). |
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