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Showing posts with label environment. Show all posts
Showing posts with label environment. Show all posts

Tuesday, November 15, 2011

Ulan Bators ‘Ice Shield’ to Influence Summer Climate

As a result of global warming Mongolia’scapital Ulan Bator suffers from unbearable hot summers caused by the so calledthe urban heat island effect. Mongolia’sgovernment is about to launch a bold project to influence the summer climate intheir capital as theguardian reports today. In giant blocks of ice geoengineers intend to“store” sill freezing winter temperatures that will aid to cool and water thecity as it slowly melts during the hot summer months.  It will be tested if the city gets cooled through the ice insummer and how much energy-intensive air conditioning can be reduced.
Specifically, the idea of the project is toartificially create “naleds”.Naleds are thick slabs of ice that naturally can be found in far northern areaswhen rivers push through cracs in the surface to seep outwards during the dayand then add an extra layer of ice during the night. Through this process theselayered ice slabs continue to grow in thickness as long as there is enoughwater pressure to penetrate the surface. Due to their thickness of more than 7metres they melt much later than regular ice.
image source

The climate manipulating project tries torecreate this process by drilling bore hole into the ice that has started toform on the Tuul river. The water will be discharged across the surface addinga new layer of ice on top. The drilling will then be repeated at regularintervals throughout the winter.
Robin Grayson, aMongolian-based geologist argues that "if you know how to manipulate them,naled ice shields can repair permafrost and building cool parks incities."
While naleds have served industrialapplications before, as military bridges in North Korea or as platforms fordrilling in Russia, the Ulan Bator climate experiment is unprecedented.
This giant project lines up with other hugeclimate manipulation projects like the raincontrol operation for the Olympics by the BeijingWeather Modification Office.

Thursday, November 3, 2011

Metabolic Architecture Repairing Itself

Image source
Protocells are able to help building bottom-up materials that form a living architecture. A quite bold claim by Rachel Armstrong from the Bartlett  in this, admittedly not very current, TED talk.
 
At the Bartlett, she is specialising in non-Darwinian techniques of evolution and the challenges of the extra-terrestrial environment. Armstrong is summarising that their research intends to generate, 
"metabolic materials to counterpose Victorian technologies [to build up] architectures from a bottom-up approach. Secondly these metabolic materials have some of the properties of living systems, which means that they can perform in similar ways. They can expect to have a lot of forms and functions within the practice of architecture. And finally, an observer in the future, marvelling at a beautiful structure in the environment, may find it almost impossible to tell whether this structure has been created by a natural process or an artificial one"
In her talk she suggests that it might be possible that Venice repairs itself. Let's hope that this amazing city will not sink before the protocells are ready to petrify the wooden piles it is build upon.

Thursday, June 4, 2009

! MAP THIS ! #15 TIME-LAPSE VIDEOS OF MASSIVE CHANGE ON EARTH

Wired Science recently posted a series of time-lapse videos on:

the Urbanization of Dubai:


Sucking Out The Aral Sea:


or Clearing the Amazon

Over the past decade, the number of people on Earth shot up by more than 13 percent, to nearly 6.8 billion people. To make room for all the hungry, breeding, CO2-emitting bodies on our small planet, we’ve ravaged Earth’s surface with staggering feats of deforestation, irrigation and urbanization — and NASA satellites have captured it all. The videos shown above (and a few more on Wired) are compiled from images posted on NASA’s Earth Observatory, of some of the most impressive conquests of man over environment.