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Ocean Currents Explain Why Northern Hemisphere Is Soggier

vinces99 writes "A quick glance at a world precipitation map shows that most tropical rain falls in the Northern Hemisphere. The Palmyra Atoll, at 6 degrees north, gets 175 inches of rain a year, while an equal distance on the opposite side of the equator gets only 45 inches. Scientists long believed that this was a quirk of the Earth's geometry – that the ocean basins tilting diagonally while the planet spins pushed tropical rain bands north of the equator. But a new University of Washington study shows that the pattern arises from ocean currents originating from the poles, thousands of miles away. The findings, published (paywalled) Oct. 20 in Nature Geoscience, explain a fundamental feature of the planet's climate, and show that icy waters affect seasonal rains that are crucial for growing crops in such places as Africa's Sahel region and southern India."

2 of 35 comments (clear)

  1. Junk Science by Anonymous Coward · · Score: -1, Troll

    This study is junk "science". The lack of rainfall in the Southern Hemisphere is a direct result of Anthropogenic Global Warming. Anyone that claims otherwise is an idiot or an oil company executive.

    It's so obvious sheeple!

    1. Re:Junk Science by Mr+D+from+63 · · Score: 1, Troll

      Whatever the reason, it is completely unfair and we must to something about it. I think a global precipitation tax is a good place to start.