Rainfall Changes Linked To Human Activity

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Greenhouse-gas emissions have made the Northern Hemisphere wetter &mdash and climate models appear to have underestimated the changes. Research from the Canadian Centre for Climate Modelling and Analysis, published in Nature, finds that human activity has made the weather wetter in a large slice of the Northern Hemisphere, while making the regions just south of the Equator wetter, and those just north of it drier. Agriculture and human health have already been affected. The proof that human activity has altered rainfall patterns was found in comparisons of observed changes with climate models. Specifically with observed rainfall during the twentieth century compared to rainfall predicted by 14 climate models. In the zone between 40 and 70 °N, which includes much of North America and most of Europe, rainfall increased by 62 millimeters per century between 1925 and 1999. The researchers estimate that between 50 and 85% of this increase can be attributed to human activity.

So how many British naysayers have been converted in these past wet weeks? JULIA WHITTY

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You expect the big picture, and it's our job at Mother Jones to give it to you. And right now, so many of the troubles we face are the making not of a virus, but of the quest for profit, political or economic (and not just from the man in the White House who could have offered leadership and comfort but instead gave us bleach).

In "News Is Just Like Waste Management," we unpack what the coronavirus crisis has meant for journalism, including Mother Jones’, and how we can rise to the challenge. If you're able to, this is a critical moment to support our nonprofit journalism with a donation: We've scoured our budget and made the cuts we can without impairing our mission, and we hope to raise $400,000 from our community of online readers to help keep our big reporting projects going because this extraordinary pandemic-plus-election year is no time to pull back.

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