Global warming happening to fast, to fast they say. .... but. .

[Wyatt earp]

World's biggest lake drys up in only 200 years..

It's soooooo fun to use science against the AGW cult


Scientists discover Sahara Desert contained the world’s largest lake named Mega Chad | Daily Mail Online


Scientists discover Sahara Desert contained the world's largest lake named Mega Chad until it evaporated in just a few hundred years

• Mega Chad covered 139,000 sq miles of Central Africa but rapidly shrunk
• Researchers found that the change took place in just a few hundred years
• Dust from dried-up lake blows across the Atlantic to fertilise the Amazon
• Lake now 137 sq miles, crossing into Chad, Niger, Nigeria and Cameroon

An enormous lake called Mega Chad in what is now the Sahara desert took just a couple of hundred years to shrink to a fraction of its size, British scientists have found.

A reconstructed lake level history for the ancient Lake Mega-Chad, once the largest lake in Africa, suggests that a North African humid period, with increased precipitation in the Sahara region, ended abruptly around 5,000 years ago, and that the lake’s Bodélé basin, now a large source of atmospheric dust, may not have dried out until around 1,000 years ago,' the team wrote.

But the researchers' discovery shows this fertilisation could only have happened 1,000 years ago – leaving a riddle as to how the jungle received vital nutrients before then.

The researchers found that the change took place in just a few hundred years – much more quickly than previously considered.

 

[skookerasbil]

= we don't know dick about the future climate!

Duh

Good post

 

[tyroneweaver]

A lot of Sugarbeet replanting in this area cuz first planting got froze out;
Some spud replants up in Oregon way

 

[Wyatt earp]

= we don't know dick about the future climate!

Duh

Good post

I posted stuff before on how the great Sahara went from tropical to dry in a blink of an eye...this is getting more interesting , what caused it?

 

[Crick]

Lake TChad (Chad) today

This isn't a lake. It's a wetspot on the ground. The volume of water that the original lake contained was minimal and, as can be seen, it is drained by multiple rivers.

I also find it had to believe that even the small blue area, NW of N;Djamena, is less than one-thousandth the area of the crosshatched area representing the original lake. Google, for instance, reports iLake Chad's current area as 521 square miles (~4 times the area you give), though a lake this shallow will vary significantly with the season, and the topography of the area wouldn't seem to provide a definitive boundary.

And your statement implying that the entire Sahara dried up and blew away in a few hundred years, is deceptive in the extreme. Even at its largest extent, Lake Chad made up only a tiny fraction of the area of the Sahara Desert. The Sahara occupies an area of 3.552 million square miles, 26 times the area of Mega Chad.

 

[Old Rocks]

The same thing that caused the drying of Lake Bonneville and the huge lakes in Oregon. A change in climate. Over a period of thousands of years as the Milankovic Cycles entered an interglacial period.

 

[CrusaderFrank]

Lake TChad (Chad) today
View attachment 191229

This isn't a lake. It's a wetspot on the ground. The volume of water that the original lake contained was minimal and, as can be seen, it is drained by multiple rivers.

I also find it had to believe that even the small blue area, NW of N;Djamena, is less than one-thousandth the area of the crosshatched area representing the original lake. Google, for instance, reports iLake Chad's current area as 521 square miles (~4 times the area you give), though a lake this shallow will vary significantly with the season, and the topography of the area wouldn't seem to provide a definitive boundary.

And your statement implying that the entire Sahara dried up and blew away in a few hundred years, is deceptive in the extreme. Even at its largest extent, Lake Chad made up only a tiny fraction of the area of the Sahara Desert. The Sahara occupies an area of 3.552 million square miles, 26 times the area of Mega Chad.

This pushes back the age of the internal combustion engine by 1,000 years

 

[CrusaderFrank]

The same thing that caused the drying of Lake Bonneville and the huge lakes in Oregon. A change in climate. Over a period of thousands of years as the Milankovic Cycles entered an interglacial period.

In the unread OP, it stated that the change occurred in 200 years

 

[Wyatt earp]

The same thing that caused the drying of Lake Bonneville and the huge lakes in Oregon. A change in climate. Over a period of thousands of years as the Milankovic Cycles entered an interglacial period.

This happened in 200 years, ya know " it happened to fast"

 

[CrusaderFrank]

The same thing that caused the drying of Lake Bonneville and the huge lakes in Oregon. A change in climate. Over a period of thousands of years as the Milankovic Cycles entered an interglacial period.

This happened in 200 years, ya know " it happened to fast"

Who knew that Neanderthals had such massive carbon footprints

 

[Wyatt earp]

Lake TChad (Chad) today
View attachment 191229

This isn't a lake. It's a wetspot on the ground. The volume of water that the original lake contained was minimal and, as can be seen, it is drained by multiple rivers.

I also find it had to believe that even the small blue area, NW of N;Djamena, is less than one-thousandth the area of the crosshatched area representing the original lake. Google, for instance, reports iLake Chad's current area as 521 square miles (~4 times the area you give), though a lake this shallow will vary significantly with the season, and the topography of the area wouldn't seem to provide a definitive boundary.

And your statement implying that the entire Sahara dried up and blew away in a few hundred years, is deceptive in the extreme. Even at its largest extent, Lake Chad made up only a tiny fraction of the area of the Sahara Desert. The Sahara occupies an area of 3.552 million square miles, 26 times the area of Mega Chad.

It's not my statement it's a science statement.





Sahara Went from Green to Desert in a Flash


Sahara Went from Green to Desert in a Flash



By Becky Oskin, Contributing Writer | April 5, 2013 02:22pm ET

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Nowadays, this portion of Libya is part of the great Sahara desert
Credit: ruba_ch | Flickr.com
From lakes and grasslands with hippos and giraffes to a vast desert, North Africa's sudden geographical transformation 5,000 years ago was one of the planet's most dramatic climate shifts.

The transformation took place nearly simultaneously across the continent's northern half, a new study finds. The results will appear in an upcoming issue of the journal Earth and Planetary Science Letters.

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The findings come from analyses of dust blown west from Africa and dropped into the Atlantic Ocean. Researchers sifted through 30,000 years of dust and ocean bottom muck retrieved with ocean drilling ships. The changing levels of windblown dust in the ocean sediments provide scientists with clues to Africa's climate and how it has changed over time. Simply put, a lot of dust means drier conditions and less dust means a wetter environment.

The wet period, called the African Humid Period, started and ended suddenly, confirming previous studies by other groups, the sediments revealed. However, toward the Humid Period's end about 6,000 years ago, the dust was at about 20 percent of today's level, far less dusty than previous estimates, the study found.

The study may give scientists a better understanding of how changing dust levels relate to climate by providing inputs for climate models, David McGee, an MIT paleoclimatologist and lead study author, said in a statement. Sahara desert dust dominates modern-day ocean sediments off the African coast, and it can travel in the atmosphere all the way to North America.

 

[Crick]

The study does not conclude that the entire Sahara became desert overnight. They conclude that some areas took thousands of years and some took less.

And what is it that you are attempting to argue with this point? That warming is not happening too fast for accomodation at present? That a volcano went off a thousand years ago is hardly an argument that it's okay to sit on top of an eruption today.

 

[Sunsettommy]

= we don't know dick about the future climate!

Duh

Good post

I posted stuff before on how the great Sahara went from tropical to dry in a blink of an eye...this is getting more interesting , what caused it?

It is caused by a periodic change from very dry to very wet back to very dry. It a rough 20,000 year cycle.

 

[Crick]

What bearing do you think this has on the warming and rate of warming of the planet over the past 150 years? This is very reminiscent of the weather vs climate error.

 

[Crick]

By the way, Bear. We are NOT saying the warming is happening "to fast". We are saying it is happening TOO FAST.

 

[Sunsettommy]

By the way, Bear. We are NOT saying the warming is happening "to fast". We are saying it is happening TOO FAST.

Which is completely contradicted by the data, which I have showed you memory holes repeatedly, here it is once again:

Q&A: Professor Phil Jones
"A - Do you agree that according to the global temperature record used by the IPCC, the rates of global warming from 1860-1880, 1910-1940 and 1975-1998 were identical?

An initial point to make is that in the responses to these questions I've assumed that when you talk about the global temperature record, you mean the record that combines the estimates from land regions with those from the marine regions of the world. CRU produces the land component, with the Met Office Hadley Centre producing the marine component.

Temperature data for the period 1860-1880 are more uncertain, because of sparser coverage, than for later periods in the 20th Century. The 1860-1880 period is also only 21 years in length. As for the two periods 1910-40 and 1975-1998 the warming rates are not statistically significantly different (see numbers below).

I have also included the trend over the period 1975 to 2009, which has a very similar trend to the period 1975-1998.

So, in answer to the question, the warming rates for all 4 periods are similar and not statistically significantly different from each other.

Here are the trends and significances for each period:"

Here is the chart based on his data up to 2009:

The current per decade warming rate is still around the .16C rate.

 

[xyz]

Russia might have some gains from global warming, not only by making a lot of the country warmer and more habitable, but also having more potential arable land, as well as having the largest navigable coastline in the world if the ice melts.

That's why some people on here support global warming.
Global Warming and Siberia: Blessing or Curse?