Archives par mot-clé : 2023

Greenland Icecap – 2023

By P. Homewood, Sep 2, 2023 in NotaLotofPeopleKnowThat


As can be seen, the rate of loss in the last decade is similar to the 1930s, 50s and 60s. During the 1970s and 80s, Greenland’s climate grew much colder, and the ice mass loss almost stopped completely.

Significantly the rate of loss now is not accelerating, as you may have assumed from what the media have told you. On the contrary, the rate of loss has been slowing down since 2012.

The average annual loss between 2013 and 2022 was 184 Gt, which equates to 0.51mm sea level rise a year.

In short there is nothing alarming or unprecedented about the tiny amount of ice melt in Greenland.

State of the climate – summer 2023

by J. Curry, Aug 15, 2023 in WUWT

A deep dive into the causes of the unusual weather/climate during 2023.  People are blaming fossil-fueled warming and El Nino, and now the Hunga-Tonga eruption and the change in ship fuels.  But the real story is more complicated.


Starting in June, the global temperatures are outpacing the record year 2016 (Figure 1).

Figure 1.  From Copernicus ECMWF

Here is the time series of the monthly surface temperature anomalies from the ERA5 reanalysis (Figure 2).  The July 2023 spike was of comparable magnitude to the winter 2016 anomaly which occurred in late winter.

Figure 2.

Here is the time series of the monthly lower atmospheric temperature anomalies from the UAH satellite-based analysis.  The July 2023 temperature anomaly remains slightly below the peak 2016 temperature anomalies and comparable to the peak 1998 temperature anomaly.

Figure 3. Plot from Roy Spencer

The spatial variation of July temperature anomalies is shown below (Figure 4). The ERA5 is the long-standing standard for global reanalyses; the JMA-Q3 (Japan) is a new product that uses a more sophisticated data assimilation process, and I expect it to be at least as good as the ERA5.  Superficially, the spatial variability looks pretty much the same, but it is informative to compare the regional amounts of warming which differ significantly between the two reanalyses. Warming is greatest in the Antarctic, and lowest in the Arctic. The warming is also very strong over the NH midlatitude oceans.

The polar regions are of particular interest. The Arctic sea ice is healthy – Arctic sea ice extent for July was only the twelfth lowest in the satellite record.  Greenland mass balance (snow accumulation minus melt) for July is above average relative to 1980-2010.  The Antarctic is a different story.  Antarctic winter sea ice is extremely low, much lower than any wintertime observations since the beginning of the satellite record in 1980.  The warm anomaly near Antarctica is an effect the reduced sea ice extent, not a direct cause. The Antarctic ozone hole is opening very early.

Why A Strong El Niño In 2023 Is Unlikely

by R. Cutler, May 25, 2023 in ClimateChangeDispatch

Global warming completely stopped in 2018. Temperatures will likely remain steady until 2025 and may decline slightly by 2030.

A strong El Niño in 2023 is unlikely.

I’ll explain all of my predictions — after we hear from the experts. [emphasis, links added]

NOAA recently predicted a 55% chance of a strong El Niñoin late 2023.

The World Meteorological Organization (WMO) threw more fuel on the fire when it announced, “There is a 98% likelihood that at least one of the next five years, and the five-year period as a whole, will be the warmest on record.

Obviously, the MSM had a field day with this. Take for example this headline from USA Today: “Scientists warn an El Niño is likely coming that could bring scorching heat to Earth.”

Rather than taking the well-worn path of pointing out flaws in the predictions of NOAA, the IPCC, or the WMO, I’ll instead show how the sun is likely responsible for almost every detail in global temperaturesover the last 125 years, and that it is also responsible for triggering strong El Niños.

Two empirical, or black-box models were created to predict global temperature. The first model uses solar magnetic field data from the Wilcox Solar Observatory (WSO).

The second model uses sunspot data from WDC-SILSO, the Royal Observatory of Belgium, Brussels. Both predictions will be compared to global temperature anomaly data from NOAA.

Solar magnetic field data collection began in 1976. The complete WSO dataset can be viewed in a single graphic, often referred to as a butterfly diagram.

It looks complicated, but it’s really not. It’s just a plot of solar magnetic field intensity over time as a function of the sun’s latitude. The two colors represent north and south polarity magnetism.

Unlike the Earth, where magnetic north has conveniently stayed in the Northern Hemisphere for the last 780,000 years, the sun’s magnetic field changes polarity every 11 years.

UAH Global Temperature Update for February, 2023: +0.08 deg. C

by Dr R. Spencer, Mar 4, 2023 in WUWT

From Dr. Roy Spencer’s Global Warming Blog

The Version 6 global average lower tropospheric temperature (LT) anomaly for February 2023 was +0.08 deg. C departure from the 1991-2020 mean. This is up from the January 2023 anomaly of -0.04 deg. C.

The linear warming trend since January, 1979 remains at +0.13 C/decade (+0.11 C/decade over the global-averaged oceans, and +0.18 C/decade over global-averaged land).