Politics.be - Welkom woestijnstad , waarom niet ?

Citaat:

Oorspronkelijk geplaatst door Klarekijk (Bericht 6546080)

De opwarming van de aarde en de oppervlakte van de woestijn neem toe .

Men wil op mars leven in gang steken om er een dampkring rond te creeeren en er te gaan leven .

De opwarming van de aarde is een probleem , waarom zou men geen mechanische waterbronnen aanboren in de woestijn er er nederzettingen bouwen , om er opnieuw groen en leven te creeeren. er een bos aanleggen en een biotoop laten ontstaan.

Een dorp met serres voor de voedselteeld ,volledig met zonnepanelen kan een hele stad van stroom voorzien en nagenoeg ecologisch werken .
De zonnepanelen zorgen voor schaduw waar de planten en groenten kunnen groeien .
Een groene oase zou regen aan trekken en de afkoeling van de woestijn met zich mee brengen en dus , als het uitdijnt mogelijk ook de themperatuur van onze planeet in het geheel in evenwicht brengen.

Is het realisisch en waarom niet ?

Een nieuwe economie , nieuwe plaats , welkom in woestijnstad .

Volgens mij gaat het globaal meer regenen als de aarde opwarmt.

Daar is onderzoek van, in Afrika (ook Sahara, onderste link) en Australië valt alleszins al meer regen als vroeger. Ook in Noord-Amerika. Ik denk bijna overal, er kunnen natuurlijk breedtegraden zijn waar het minder regent. In elk geval zullen de woestijnen of eerder zeer droge gebieden meer regen krijgen...

bvb 2010 en 2011 moeten extreem geweest zijn volgens NASA (wereldwijd)

Citaat:

http://www.vancouverobserver.com/blo...rd-oceans-fell

NASA: it rained so hard the oceans fell

Barry Saxifrage Posted: Sep 27th, 2011

The year 2010 was one the worst years in world history for high-impact floods. But just three weeks into the new year, 2011 has already had an entire year's worth of mega-floods. “ -- Meteorologist Jeff Masters

I spend hours a day researching what New York Times columnist Thomas Friedman calls “global weirding”: the destabilization of our weather system fueled by the three million tonnes of fossil fuel pollution we inject into it each hour. So it is a rare day when something shocks me as much as a recent U.S. National Aeronautics and Space Administration (NASA) report on last year’s extreme rainfall.

As most locals know from soggy personal experience, our corner of planet Earth since last spring has been a bit wetter and greyer than normal. And next door, our Washington neighbours donned their gum boots and slogged through their fourth wettest year since 1895.

Still, we got off lucky. Very lucky it turns out.

According to this jaw-dropping NASA report, worldwide rainfall and snowfall were so extreme, in so many places last year, that sea levels fell dramatically.

bron: < global warming means more rain > ;-)
https://www.google.be/webhp?sourceid...w=1594&bih=827

veel vroeger dacht men dat al (satelliet-data van 20 jaar), dus de voorspellingen kwamen uit:

Citaat:

http://news.softpedia.com/news/Globa...ns-56209.shtml

une 1st, 2007, 12:24 GMT · By Stefan Anitei

Global Warming Means in Fact More Rain

Many people are afraid that the global warming will turn many areas into deserts, besides flooding low areas and melting the mountain glaciers and polar ice caps.

But a new analysis of 20 years of satellite data shows that rising temperatures will bring in fact more rainfall, challenging classic climate model concepts and could help researchers forecast with greater accuracy dramatic weather events like El Ni�o.

It has been known for a long time that with each additional degree Celsius added by the global warming, the planet gets an extra 7% of water into its atmosphere.

Previous computer models forecast that an increase in the atmospheric wetness will only increase rainfall by 1% to 3% for each supplementary degree with which the temperature rises. This was assumed because, even if there is more water in the atmosphere, the rainfall amount and evaporation slows down. But these models were found to underestimate rainfall and neglect great weather events like the 1998 El Ni�o in simulating weather patterns over the past 2 decades.

That's why a team at Remote Sensing Systems, a satellite analysis company in Santa Rosa, California, fixed the models. The researchers employed real historical data gathered from six satellites to assess the relations between total atmospheric water, precipitation, evaporation, and global temperature.

Precipitation and evaporation shifted in connection with total atmospheric water: a rise of 6.5% for each additional degree Celsius for Earth's temperature, thus evaporation and precipitation levels are directly connected with the level of humidity in the atmosphere.
The problem is that this is an overall data, and the annual rainfall level can vary greatly around the globe, and some regions can experience drought. "In the tropics, you would get as much as 65 millimeters of water, whereas in the northern latitudes, it might only be a few millimeters," said physicist Frank Wentz from the research team.

"The study is the first to question the accuracy of precipitation in current climate models. There are dozens of different climate models out there, and every single one of them predicts that precipitation will increase more slowly than this study suggests. Plus, they all get the historical record wrong. Improving these models could help climatologists better predict future storms," said climatologist Brian Soden of the University of Miami in Florida.

Of simpel, Wiki:

Citaat:

http://en.wikipedia.org/wiki/Sahara

Sahara Desert Greening Due to Climate Change?
James Owen
for National Geographic News
July 31, 2009

Desertification, drought, and despair—that's what global warming has in store for much of Africa. Or so we hear.

Emerging evidence is painting a very different scenario, one in which rising temperatures could benefit millions of Africans in the driest parts of the continent.

Recent signals indicate that the Sahara and surrounding regions are greening because of increased rainfall. Satellite imaging shows extensive regreening of the Sahel between 1982 and 2002, and in both Eastern and Western Sahara a more than 20-year-long trend of increased grazing areas and flourishing trees and shrubs has been observed by climate scientist Stefan Kröpelin.[23]

http://news.nationalgeographic.com/n...en-sahara.html

Scientists are now seeing signals that the Sahara desert and surrounding regions are greening due to increasing rainfall.

If sustained, these rains could revitalize drought-ravaged regions, reclaiming them for farming communities.

This desert-shrinking trend is supported by climate models, which predict a return to conditions that turned the Sahara into a lush savanna some 12,000 years ago.

Green Shoots

The green shoots of recovery are showing up on satellite images of regions including the Sahel, a semi-desert zone bordering the Sahara to the south that stretches some 2,400 miles (3,860 kilometers).

Images taken between 1982 and 2002 revealed extensive regreening throughout the Sahel, according to a new study in the journal Biogeosciences.

The study suggests huge increases in vegetation in areas including central Chad and western Sudan.

The transition may be occurring because hotter air has more capacity to hold moisture, which in turn creates more rain, said Martin Claussen of the Max Planck Institute for Meteorology in Hamburg, Germany, who was not involved in the new study.

"The water-holding capacity of the air is the main driving force," Claussen said.