Climate Change Could Revive Medieval Megadroughts in US Southwest

By Earth Institute at Columbia U – Re-Blogged From EurekAlert

About a dozen megadroughts struck the American Southwest during the 9th through the 15th centuries, but then they mysteriously ceased around the year 1600. What caused this clustering of megadroughts — that is, severe droughts that last for decades — and why do they happen at all?

If scientists can understand why megadroughts happened in the past, it can help us better predict whether, how, and where they might happen in the future. A study published today in Science Advances provides the first comprehensive theory for why there were megadroughts in the American Southwest. The authors found that ocean temperature conditions plus high radiative forcing — when Earth absorbs more sunlight than it radiates back into space — play important roles in triggering megadroughts. The study suggests an increasing risk of future megadroughts in the American Southwest due to climate change.

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Sea Surface Temperatures Ahead of Hurricane Florence

By Bob Tisdale – Re-Blogged From WUWT

August 2018 Hurricane Region Sea Surface Temperatures, in Advance of the Peak Hurricane Month and Florence Making Landfall, Assuming She Does

September is upon us, and September is the peak month for hurricane activity in the North Atlantic. (See the NOAA Hurricane Climatology graph via Wikipedia.)  So, to check the temperature conditions leading up to the peak month, let’s take a look at the August 2018 sea surface temperatures anomalies and sea surface temperatures for the hurricane development regions—Main Development Region (10N-20N, 80W-20W), Caribbean (10N-20N, 86W-60W), and Gulf of Mexico (21N-31N, 98W-81W)—along with those of the waters along the east coast of the United States (24N-40N, 80W-70W).  For the geographically impaired, see the map here for the locations of those regions.

Note: This is simply a data presentation, so don’t be looking for conclusions at the end of the post.  [End note.]

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Trump Administration to Open 90% of US Offshore to Leasing and Roll Back Obama-Era Drilling Regulations

By David Middleton – Re-Blogged From http://www.WattsUpWithThat.com

The plan is to open almost everything in the 2019-2024 OCS Oil and Gas Leasing Program, with Eastern Gulf leasing beginning when the Congressional moratorium expires after 2022.

Secretary Zinke Announces Plan For Unleashing America’s Offshore Oil and Gas Potential

Draft Proposed Program considers nearly the entire U.S. Outer Continental Shelf for potential oil and gas lease sales

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