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New study suggests the Atlantic overturning circulation AMOC “is on tipping course”

Real Climate

The paper results from a major computational effort, based on running a state-of-the-art climate model (the CESM model with horizontal resolution 1° for the ocean/sea ice and 2° for the atmosphere/land component) for 4,400 model years. Nature 2018. Figure adapted from Caesar et al.,

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A Nobel pursuit

Real Climate

Fortunately, Manabe recently wrote a retrospective on his early work in response to receiving the Crafoord prize in 2018. The key aspects were the inclusion of water vapour feedback as temperatures increased, and the use of ‘convective adjustment’ to maintain stability of the lower atmospheric column.

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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. Here we start by taking the Greenland mass loss rate into the ocean, times the temperature difference between the meltwater and the water it replaces. For the part entering the ocean as ice, we must also consider that to melt ice requires energy.

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Analysis: Moving the dial on ocean-based CO2 removal

A Greener Life

Two reports published in the US look seriously at the practicalities and responsibilities of altering the ocean to tackle the climate crisis. It’s now widely acknowledged that to avoid catastrophic climate change we’ll need to physically remove CO2 from the atmosphere. The ocean as a carbon sink.

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Deciphering the ‘SPM AR6 WG1’ code

Real Climate

Another clue indicating a shortcoming is if you look at the atmospheric CO 2 -concentrations over time to see how much impact the IPCC reports have had on the real policy-makers in the world (Figure below). The cause of our changing climate is the increase in atmospheric greenhouse gas concentrations that we have released into the air.

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Wind Industry Activity Strongly Correlated With Whale Deaths, New Study Finds

Environmental Progress

LISA LINOWES and ERIC TURNER on behalf of the SAVE RIGHT WHALES COALITION Since 2016, the National Oceanic and Atmospheric Administration (NOAA) has declared three Unusual Mortality Events (UME) involving large whale species in the Atlantic Ocean. The change in vessel activity after 2015 coincided with the U.S.

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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

In addition, it stores vast quantities of freshwater that if released to the ocean would rise sea level by tens of meters and interfere with saline-driven ocean currents that transfer heat around the planet. In the ocean, 19 marine heatwaves have been recorded between 2002 and 2018. Prof Martin Siegert in Antarctica.

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