Archives quotidiennes :

better to know...?, climate-debate

No, July Wasn’t The Warmest Month In Human History

by Dr M. Wielicki, Aug 14, 2023 in ClimateChangeDispatch

What’s going on?

During the last month, we were bombarded with headlines such as:

This month is the planet’s hottest on record by far – and hottest in around 120,000 years, scientists say —CNN, July 27, 2023

July 2023 ‘Virtually Certain’ To Be Hottest Month In Human History —Forbes, July 27, 2023

So is there any validity to these claims… Was July the hottest month in human history? [emphasis, links added]

…snip…

Our civilization’s trajectory, from its humble beginnings in the wild to its current digital sophistication, serves as a testament to humanity’s relentless drive for advancement and ability to adapt.

The African Humid Period (AHP) and the rise of the Egyptian civilization…

The African Humid Period (AHP) is a climatic phase during the Holocene epoch characterized by much wetter conditions in large parts of Africa, especially the Sahara region, compared to the present day.

This significant shift in precipitation patterns had profound impacts on both the environment and early human societies of the continent.

The AHP roughly spanned from about 15,000 to 5,000 years ago, though exact timings can vary based on specific regions within Africa. It began at the end of the Last Glacial Maximum when ice sheets started retreating in the Northern Hemisphere.

One of the most dramatic manifestations of the AHP was the transformation of the Sahara desert. Today’s vast desert expanse was once a mosaic of grasslands, lakes, and rivers.

This “Green Sahara” supported a variety of wildlife, from large mammals like elephants and giraffes to a variety of fish in its waterways.

The wet conditions of the AHP supported a much denser human population in regions that are now desert. Archaeological evidence shows that these ancient Saharan communities engaged in fishing, hunting, cattle herding, and even agriculture.

The abundance of water and food allowed for relatively settled lifestyles compared to the more nomadic existences necessitated by the arid conditions that followed.

The primary driver behind the AHP is believed to be warmer summer temperatures and changes in the monsoon systems, which brought more rain to the African continent.

As these parameters shifted over millennia, the monsoons weakened, leading to the aridification of vast regions.

The African Humid Period serves as a reminder of the profound climatic variability our planet has experienced throughout relatively recent geological history at preindustrial levels of CO2, and the relative insensitivity of surface temperature and/or humidity and the concentration of GHG in the atmosphere.

…

climate and geology

The MSM Has Memory-Holed Tonga’s Warming Effects On World Temps

by E. Erickson, Aug 14, 2023 in ClimateChangeDispatch

On Jan. 15, 2022, the underwater Hunga Tonga–Hunga Ha’apai volcano in the Pacific exploded. The volcano triggered tsunamis in the South Pacific and sent a massive plume of water vapor into the stratosphere.

Over the past year, scientists have increased the estimates of how much water vapor went into the stratosphere. That water vapor, every scientist agrees, warms the planet. [emphasis, links added]

Originally, scientists estimated 50 million metric tons of water went into the atmosphere.

Now, revised estimates are at 150 million metric tons, which equates to 40 trillion gallons of water injected into the stratosphere.

Over the past year, dozens of scientists have produced papers warning that the summer of 2023 and possibly into the next decade would be abnormally hot.

Scientists suggest the global temperature could increase more than 1.5 degrees Celsius.

In fact, that is exactly what is happening. Up until the summer heat wave, news reports noted the expected increase in temperatures due to the volcano.

But as the heat wave began, as predicted, the volcano and its water vapor disappeared from coverage.

Now, in the progressive spirit of never letting a crisis go to waste, the American and European press corpshave begun a full-court press on climate change.

Instead of the volcano, people, capitalism, and oil companies are to blame for the heat wave.

…

…

climate-debate

Those who don’t study weather history are condemned to repeat it as ‘climate alarmism’

by A. Watts, Aug 14, 2023 in WUWT

Our friend Steve Hayward over at Powerline Blog gave me permission to reprint this. It’s weather deja vu all over again. These familiar headlines could just as well be happening today, excpet back then it was reported as weather, not climate. – Anthony

WHITHER THE WEATHER?

The scenes out of Lahaina on Maui are horrific, but naturally the climate cult is rushing to say the inferno that engulfed the town is yet more proof of climate change, and hand over your car keys and gas stoves now. “Yes, I Blame the Climate Crisis for the Horrors on Maui,” says a writer in that premier science journal Esquire. Never mind that Hawaiian officials have been warning for years that overgrowth of non-native grasses on the dry side of Maui and other Hawaiian islands was creating a severe wildfire risk. (For an antidote to the madness, see “Stop claiming that fires in Canada, Greece, and now Maui are due to climate change.”)

Much of the summer’s news has been about heat waves, which are also said to be proof of climate change, even though very few record high temperatures were broken this summer. Heat waves have always been big news for the media, but decades ago no one thought to blame them on human sin.

It is worth following a fellow named Don Penim on Twitter. Mr. Penim appears to have sufficient leisure time on his hands to scour old newspaper archives for articles on heat waves and extreme weather events, and he also turned up headlines from a few decades ago to remind us that wildfires are not unusual for Hawaii:

Let’s note a few others from Mr. Penim’s archive while we’re here—note the dates of most of these stories:

 

…