Showing posts with label links. Show all posts
Showing posts with label links. Show all posts

Wednesday, July 24, 2024

Rain Walks

This is a story from Paul Krafel that I think should be more widely known and celebrated.  Thank you, Paul.


Rain Walks

A simple play I’ve made hundreds of times exemplifies “every play is two plays.” High in the drainage, as runoff increases, the rising runoff begins overflowing its shallow channels, spreading out into easily overlooked overflow routes. Sometimes a rock lies in the overflow channel, obstructing how much of the runoff can flow that way. I lift the rock out of the channel so that more of the runoff can flow in this new direction (Play One). I then place that rock in the main channel so that it shunts more of the runoff towards the overflow channel (Play Two). 

This simple moving of the rock is two plays. The broader, slower overflow route receives more runoff because of the removal of the rock, and the deeper main channel receives less because of the new placement of that rock. Though much of the water still flows down the main channel, more is now flowing along the broader, slower overflow route.

Rising water has a distinctive appearance. Surface tension holds the water’s surface against plant stems and rock edges so that this ring of contact lags behind the rising level of the surrounding water. This creates a dimpled surface around each stem and rock sticking up out of the water. These dimpled surfaces sparkle with focused light. I can watch this dance of light advance with the increased flow down the overflow route.

Read more here...

Another interesting article by Paul here.  

Sunday, February 26, 2012

Ecology board games


http://boardgamegeek.com/blogpost/1403/designer-diary-evolutionary-lessons-discovered-on

Thursday, December 02, 2010

Presentations about Presentations

SlideShare.net contains a huge number of awesome presentations. If TED.com is the best place to learn what makes a great talk, slideshare.net is the best place to focus on the slides behind the speaker. Its funny, but there are whole schools devoted to the technique of writing, but the ability to craft compelling slides is so often overlooked.

The site is also a great place to store presentations in the cloud.

Friday, November 26, 2010

Warm Arctic --> Cold Continents

As the Arctic warms, atmospheric changes may paradoxically bring colder winters to North America and Eurasia. If a warm Arctic leads to an early breakup of the polar vortex then the mid-latitudes will be inundated with cold Arctic air during mid-winter but spring comes early since much of the cold air gets dissipated early.


Earth Observatory:stratosphere influences winter weather

Wunderground: winter La Nina forecast

NOAA Arctic "Report Card"


"There is evidence that the effect of higher air temperatures in the lower Arctic atmosphere in fall is contributing to changes in the atmospheric circulation in both the Arctic and northern mid-latitudes. Winter 2009-2010 showed a new connectivity between mid-latitude extreme cold and snowy weather events and changes in the wind patterns of the Arctic; the so-called Warm Arctic-Cold Continents pattern."

Paleorecord of arctic warming indicates these conditions are unprecedented in at least the last few thousand years. For more information on climate change-linked weather anomalies, check out the 2010 drought in the Amazon.

Tuesday, April 17, 2007

Opportunities

www.caretaker.org
www.coolworks.com
www.housesitter.com
www.organicvolunteers.com