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The water south of Greenland has been cooling, so what causes that?

Real Climate

Sea surface temperature trend 1993 – 2018, from European Atlas of the Seas. An AMOC weakening by 15 % thus cools the region at a rate of 0.15 x 10 14 W and according to model simulations can fully explain the observed cooling trend (2). Let’s compare two possibilities by a back-of-envelope calculation. (1)

Cooling 344
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Phantastic Job!

Real Climate

There was a workshop in 2018 (that I attended) to discuss how one might go about doing something better – updating the data, improving quality control, and using models to better connect local or regional signals to the global means. and, like many of us, had found the then-current literature somewhat unsatisfactory. van der Meer, C.R.

Sea Level 354
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Deciphering the ‘SPM AR6 WG1’ code

Real Climate

In addition, ozone depletion higher up in the stratosphere has caused a cooling high up in the atmosphere. The global mean sea level has increased by 20 cm from 1901 to 2018, and the rate of increase has accelerated and is now about 3.7 This is likely an effect of man-made climate change. mm increase every year.

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California’s Thirsty Future: The Role of Vapor Pressure Deficit in Our Changing Climate and Drought

Union of Concerned Scientists

From droughts to wildfires to rising sea levels and torrential rains, the state has felt the effects of a changing climate in a variety of ways. California has experienced a significant increase in the extent of forest fires in recent decades, with a fivefold increase in annual burned area from 1972 to 2018.

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The AMOC: tipping this century, or not?

Real Climate

So the Ditlevsens used sea surface temperatures (SST) in a region between the tip of Greenland and Britain as an indicator, based on Caesar et al. 2018 ( PDF ; I’m a coauthor on that paper). If the AMOC weakens, this region will cool. We have direct AMOC measurements only since 2004, a time span too short for this type of study.

Ocean 242
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Arctic Futures: White Shield or Blue Economy

Legal Planet

Total loss of the Greenland ice sheet, for example, would raise sea levels globally by more than 20 feet. The paper sets out an agenda for research into ways to limit glacial ice-sheet deterioration and associated sea level rise. Open Arctic sea lanes dramatically shorten shipping times from China to Europe.

Ocean 189
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Antarctic extreme events: ‘All-time records are being shattered not from decades ago, but from the last few years and months’

Frontiers

For example, Antarctica acts to cool our planet by reflecting solar radiation back to space by virtue of the brightness of its snow surface. In the ocean, 19 marine heatwaves have been recorded between 2002 and 2018.

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