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climate-debate

Media Regurgitate Nonsense About Greenland Ice Sheet And Sea Level Rise

by D. Burton, Apr 3, 2023 in ClimateChangeDispatch

CNBC and the Potsdam Institute (PIK) report that:

We’re halfway to a tipping point that would trigger 6 feet of sea-level rise from the melting of the Greenland Ice Sheet

PUBLISHED WED, MAR 29 202312:12 PM EDT By Catherine Clifford

KEY POINTS:

● Once people have cumulatively emitted approximately 1,000 gigatons of carbon in total, then the southern part of the Greenland Ice Sheet will melt eventually causing the sea level to rise by almost six feet.

● Once humans have cumulatively emitted approximately 2,500 gigatons of carbon in total, the whole Greenland Ice Sheet will eventually melt and the sea level rise would rise by 6.9 meters or 22.6 feet.

 

● And right now, now we are at approximately 500 gigatons of carbon emissions released.

Here’s the article.

Here’s the paper.

Like most things from PIK, this “study,” and this CNBC article, are nonsense. [emphasis, links added]

The best estimates are that since 1850, anthropogenic carbon emissions have totaled about 675 Gt of carbon (a/k/a PgC) (not 500).

Over that same period, the amount of CO2 in the atmosphere has increased by only about 135 ppmv CO2 = 287 PgC (gigatonnes carbon).

The difference is the amount removed from the atmosphere by natural negative feedbacks, such as absorption by the oceans, the greening of the Earth, and rock weathering.

(Aside: Petagram ≡ gigatonne ≡ Gt, and “PgC” means “petagram of carbon,” so 1 PgC = 1 Gt of carbon (GtC). 1 ppmv CO2 = 7.8024 Gt CO2 = 2.12940 PgC.)

Yet we’ve only gotten an estimated 1.02 to 1.27 °C of warming from all that CO2, and it’s beenaccompanied by negligible acceleration in sea-level trends:

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climate-debate

Greenland Temperatures 2020

by P. Homewood, June 12, 2021 in NotaLotofPeopleKnowThat

I mentioned a year ago that the reason for the deficit in ice mass increase during the winter and spring of 2020 was sustained cold and dry weather. (Conversely milder weather tends to bring snow). I also reported how the summer melt began much later than normal.

The Danish Meteorological Institute (DMI) have now published the official Greenland temperature for last year, bearing this out and showing how cold it really was:

 

image

Greenland Surface Mass Ice Balance 2019/20

http://polarportal.dk/en/greenland/surface-conditions/

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climate-debate

New Study: Sea Levels Have Receded Over Last 1500 Years, Including Since 1800s, Along India’s Coasts

by K. Richard, April 3, 2023 in NoTricksZone

Contrary to alarmist claims, the seas have been retreating and the coasts have been expanding seaward along the coasts of southern India since the early 1800s.

Korkai was a port city, capital, and the principal trade center for India’s Pandya Kingdom from the 6th to 9th centuries CE.

While Korkai was situated on the sea coast during the early stages of the Medieval  Warm Period, the city center is now approximately 5 or 6 km from the coast. This confirms the sea has substantially receded since then.

Nautical maps from the 1805-1828 period clearly affirm the coast of southern India has continued expanding seaward in the last 200 years, despite the reported rise in relative sea level (Gupta and Bhoolokam Rajani, 2023).

In other words, much more coastal land area is above sea level today than during the Little Ice Age, or when CO2 levels were said to be 280 ppm.

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