Huge Parts of World Are Drying Up

Huge Parts of World Are Drying Up

There are 234 comments on the Science Daily story from Oct 10, 2010, titled Huge Parts of World Are Drying Up. In it, Science Daily reports that:

Most climate models have suggested that evapotranspiration, which is the movement of water from the land to the atmosphere, would increase with global warming.

Join the discussion below, or Read more at Science Daily.

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litesong

Pittsburgh, PA

#1 Oct 10, 2010
The AGW science continues that as greater moisture is placed in the atmosphere from warming oceans & greater total precipitation occurs, large areas of the Earth will NOT benefit.
Northie

Spokane, WA

#2 Oct 10, 2010
Forget rising sea levels for now. Drought is the real climate impact story.

Since: Apr 10

Milwaukee, WI USA

#3 Oct 10, 2010
There will be more precipitation in a warmer world. The IPCC tells us so in chapter ten of the last assessment report. Like they say in New York, you can look it up.

You liberals continue to blab on and on and on and on and on and on and on and on about drought, when the opposite is true. If anything in the future wetter world, thee will be more floods.

But, warmer weather, more rain, longer growing seasons, more atmospheric CO2 to accelerate crop production are all good things that you liberals consistently ignore.

Doom and gloom is the order of your day, isn't it.
litesong

Pittsburgh, PA

#4 Oct 10, 2010
Steve Case wrote:
There will be more precipitation in a warmer world. If anything in the future wetter world, thee(sic) will be more floods.
But, warmer weather, more rain, longer growing seasons, more atmospheric CO2 to accelerate crop production are all good things that you liberals consistently ignore.
As your post proves, you don't read the articles about which you comment.

As stated in the article & post #1, more rainfall WON'T benefit large areas of Earth. My already drenched Pacific Northwest seems to be sucking up a lot more rainfall. The last two days saw one of our regions get nailed with 19 inches of rain in 2 days.....ho hum....more record rains.....yawn.....

But the desert cacti still bloom only 40 miles away from the Hoh Rain Forest which gets as much as 200 inches of rain per year.
Northie

Spokane, WA

#5 Oct 10, 2010
Steve Case wrote:
There will be more precipitation in a warmer world. The IPCC tells us so in chapter ten of the last assessment report. Like they say in New York, you can look it up.
You liberals continue to blab on and on and on and on and on and on and on and on about drought, when the opposite is true. If anything in the future wetter world, thee will be more floods.
But, warmer weather, more rain, longer growing seasons, more atmospheric CO2 to accelerate crop production are all good things that you liberals consistently ignore.
Doom and gloom is the order of your day, isn't it.
Wake up, Case. More precipation in general means little when most land areas will dry out due to faster evapotranspiration.

Drought is up dramatically, worldwide, with severe drought doubling since the early 1970s. Now we better understand why.

http://www.ucar.edu/news/releases/2005/drough...

If all that's too negative for your delicate sensibilities, maybe it's time to admit the need to protect the climate.
Earthling

Valencia, Spain

#6 Oct 11, 2010
I live in a country that's often plagued by drought and IIRC, Norfie told me a while ago that it was going to get worse.
The opposite has happened, over the last 3 years, Spain has enjoyed increased precipitation, so at least one drought theory has gone down the waterspout.
Australia, Africa and South America are countries where drought has been common for as long as mankind can remember, it's old news.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#7 Oct 11, 2010
Someone must of forgot that the majority of the earth is covered in water to start with. So if evapotranspiration is such a problem then you should see even more rain and flooding around the world, not less and less droughts.

Those 'models' they are referring to ignore the fact that the majority of the earth is water covered. Over seventy percent. Then again the IPCC model ignored the fact that it rains.
Earthling

Valencia, Spain

#9 Oct 11, 2010
Drought - History
-
"Studies of tree rings in the United States have identified droughts occurring as early as 1220. The thickness of annual growth rings of some tree species, such as red cedar and yellow pine, indicates the wetness of each season. The longest drought identified by this method began in 1276 and lasted 38 years. The tree ring method identified 21 droughts lasting five or more years during the period from 1210 to 1958."

Read more: Drought - History - Droughts, People, Million, Korea, Africa, and North http://science.jrank.org/pages/2165/Drought-H...
-
When did the Industrial Revolution begin?
Earthling

Valencia, Spain

#10 Oct 11, 2010
"The infamous 1970s drought of the African Sahel region, which lasted several decades and killed more than 100,000 people, was actually a "minor" event, say researchers who have uncovered evidence that such droughts occur cyclically in the region and can be much more severe."
-
"The most recent mega-drought was just 500 years ago, spanning 1400 to 1750 and coinciding with Europe's Little Ice Age. At the time, Lake Bosumtwi dropped so low for so long that a forest sprouted on the crater's edges. Those trees now stand in 15 to 20 metres of water (see images, right)."
http://www.newscientist.com/article/dn16967-a...
-
When did the Industrial Revolution begin?
Northie

Spokane, WA

#11 Oct 11, 2010
Earthling wrote:
I live in a country that's often plagued by drought and IIRC, Norfie told me a while ago that it was going to get worse.
The opposite has happened, over the last 3 years, Spain has enjoyed increased precipitation, so at least one drought theory has gone down the waterspout.
Australia, Africa and South America are countries where drought has been common for as long as mankind can remember, it's old news.
1) Spain has just experienced one of its longest droughts in recorded history.

2) Australia, Africa and South America are continents, not countries, and all have seen drought due to climate cooking, or did you not read the article?

Since: Apr 10

Milwaukee, WI USA

#12 Oct 12, 2010
tina anne wrote:
Someone must of forgot that the majority of the earth is covered in water to start with. So if evapotranspiration is such a problem then you should see even more rain and flooding around the world, not less and less droughts.
Those 'models' they are referring to ignore the fact that the majority of the earth is water covered. Over seventy percent. Then again the IPCC model ignored the fact that it rains.
Exactly the reason the IPCC's 4th Assessment Report tells us in Chapter Ten that there will be more precipitation.

It's analogous to some Bible thumper conveniently ignoring the lessons that Jesus has taught.

By the way “evapotranspiration” shows up on the Microsoft word spell checker as “No spelling suggestions” which means that the AGW crowd has made the word up out of whole cloth. In other words, it is spin pure and simple.

Does everyone know what spin is? When a fact is presented that you don't like and can't be refuted, spin is required to fit it to your agenda. In this case, it is darned inconvenient to AGW supporters that in a warmer world there will be more precipitation So spin must rephrase the inconvenient fact into a statement that is friendly to your agenda, and that's exactly what the “evapotranspiration” yarn does.

Blunt Mocker

Peterborough, UK

#13 Oct 12, 2010
Northie wrote:
<quoted text>
1) Spain has just experienced one of its longest droughts in recorded history.
2) Australia, Africa and South America are continents, not countries, and all have seen drought due to climate cooking, or did you not read the article?
no, it hasn't, Spain has just had some of the heaviest ever rainfall . This happened, obviously, just after a gloom and doom prophecy from you people that Spain would run out of water.
Earthling

Valencia, Spain

#14 Oct 12, 2010
Northie wrote:
1) Spain has just experienced one of its longest droughts in recorded history.
In the last 3 years, Spain has recovered from one of the worst droughts for 40 years, but it wasn't as bad as the drought of 1912.
What does that tell you?
Oh yes, it happened in 1912, almost 100 years ago.
Motorised vehicles and coal fired power stations were not responsible for the drought back then.
Northie wrote:
2) Australia, Africa and South America are continents, not countries, and all have seen drought due to climate cooking, or did you not read the article?
Thanks for the geography lesson.

I don't believe in climate, "cooking."
Earthling

Valencia, Spain

#15 Oct 12, 2010
Northie

Spokane, WA

#16 Oct 12, 2010
Steve Case wrote:
<quoted text>
“evapotranspiration” shows up on the Microsoft word spell checker as “No spelling suggestions” which means that the AGW crowd has made the word up out of whole cloth. In other words, it is spin pure and simple.
"Evapotranspiration" has been in common scientific usage since 1938. Read much?

http://www.merriam-webster.com/dictionary/eva...
Earthling

Valencia, Spain

#17 Oct 12, 2010
Evapotranspiration, just a word to cover evaporation, sublimation and transpiration in one hit.
Earthling

Valencia, Spain

#18 Oct 12, 2010
"Droughts have taken place around the world throughout history. Some scientist theorize that droughts brought about the migrations of early humans. From 1876 to 1879, severe droughts in China caused the deaths of millions of people from lack of food. In 1921, a drought along the Volga River basin in Russia led to the deaths of almost five million people, more than the total number of deaths in World War I (1914–18)."

Read more: Drought - humans, body, water, plants, characteristics, animals, air, parts, effects, plant, part, History, Human impact on droughts http://www.scienceclarified.com/Di-El/Drought...
Earthling

Valencia, Spain

#19 Oct 12, 2010
Plains Drought Cycle Has Long History, Ominous Future
"Cyclical droughts have ravaged the United States' northern Great Plains for thousands of years, a new study says. Scientists expect the potentially devastating events to continue—perhaps with a boost from global warming."
http://news.nationalgeographic.com/news/2005/...
Earthling

Valencia, Spain

#20 Oct 12, 2010
The Drought That Changed World History
"Geologists now aver that there was a mighty drought of three centuries around the time of 2200 BC, which severely affected civilizations across India, West Asia, and North Africa. The following is a Wikipedia extract about this event:

“A phase of intense aridity in &#8776;4.2 ka BP (4200 years Before Present) is well recorded across North Africa, the Middle East, the Red Sea, the Arabian peninsula, the Indian subcontinent, and even mid-continental North America. Glaciers throughout the mountain ranges of western Canada advanced at about this time.”
http://www.disinfo.com/2010/02/the-drought-th...
Northie

Spokane, WA

#21 Oct 12, 2010
From Dai, Trenberth et al, 2004 (approximately when global drought was identified as a serious and growing long-term trend; its severity has increased since):

"Most parts of Eurasia, Africa, Canada, Alaska, and eastern Australia became drier from 1950 to 2002. Large surface warming has occurred since 1950 over these regions, which is a major cause for the widespread drying over these regions. Without the warming, the PDSI decreases would have been much smaller and less pervasive. In fact, the warming by the end of the twentieth century results in decreases of 0.5–1.5 of PDSI over most land areas. These decreases are very significant considering that a PDSI of less than 0.5 is classified as dry or drought conditions by Palmer (1965). The largest drying effect occurred over central Asia and Canada, where the surface air has warmed 1.5–2.0 C since 1950. The drying over the arid Middle East and Sahel is also large after 1950, with contributions from both decreased precipitation and increased temperature over the regions."

http://journals.ametsoc.org/doi/pdf/10.1175/J...

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