Harold Brown's blog

Climate change and uncertainty

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Hurricane Sandy has been described as a harbinger of what comes with rising seas: the inundation of coastal cities, devastating storm surges, destruction of coastal wetlands and abandonment of land. The story is simple: Glaciers melt and oceans warm, causing seas to rise.

The reality, however, is anything but simple. The sea has been rising since the last ice age, but at a variable and poorly known rate. Long-term measurements are necessary to establish an accurate trend, but measurements were few in the 19th and early 20th centuries, especially in the Southern Hemisphere. Read More»