I’ve been busy on other projects and have not been maintaining this blog. For the past 2 years I’ve been working on local (Philadelphia) environmental issues and simply did not have the time to keep up with my climate charts.
I am reactivating this blog with a renewed sense of purpose. I will be cleaning up the blog, prioritizing and streamlining the site. Please bear with this clean-up effort.
Let’s look at a recent Romney campaign ad to get a sense for his views: Continue reading
Mitt Romney and Barak Obama’s views on global warming, in their own words. Continue reading
This post shows how to download and animate a series of Arctic Sea Ice Extent images using R and the animation package.
In my previous post I showed an animation of Arctic Sea Ice Extent from the 1980′s through August, 2012 (link). In this post, I show how to build this Arctic Sea ice Extent animated chart.
The Arctic Ice Sea Monitor (link) updates their daily csv file with the latest satellite based arctic sea ice measurements. Here is the daily csv file link.
To develop my animation of the daily Arctic Sea Ice extent, I decided to produce a plot for each year that showed the current year in red and the previous years in grey. I go this idea from Tamino at Open Mind.
Here is my R script: link.
Once I have the individual png files for each year, I use Photoshop Elements to generate my animation.
After getting Pierre’s comment about using the animation package, I gave it another try. The 2nd time, I got it to work with ease.
I can now update the daily ASIE plot automatically without any Photoshop Elements involvement.
Understanding what is happening to Arctic sea ice is critical to recognizing the serious consequences of global warming. So I want to help people visualize the 30+ year trend in Arctic sea ice extent.
The source data file is here: http://www.ijis.iarc.uaf.edu/seaice/extent/plot.csv
Here is an informative interview with NASA’s Josh Willis about global sea level rise and El Nino – La Nina. I first saw the video on Zeke Hausfather’s YALE Forum on CLIMATE CHANGE & THE MEDIA