21 October 2015

Environment Aotearoa 2015 omits NZ's greenhouse gas growth trend

The Ministry for the Environment and the Statistics Department jointly released the new state of the environment report Environment Aotearoa 2015 today.

The press release for the co-produced report, promises quite a lot.

Government Statistician Liz MacPherson said the report gives a clear and independent overview, based on the best-quality information available.
Ms MacPherson said the report uses robust data from hundreds of sources, and follows international best practice for environmental reporting. “We would like to improve the data for future reports, and we are working on this,”
"The report is supported by interactive web pages containing trend and regional data. I would encourage people to take a look at the areas they are interested in.”

Wow! Interactive web pages containing trend and regional data! How could I resist the temptation to look for some interactive graphs of greenhouse gas emissions! And to compare their graphs with my graphs.

I browsed on through the 'Atmosphere and Climate' domain to the page for Global greenhouse gas emissions and found only...information on global greenhouse gas emissions. And a factoid that could have culled from any speech by Tim Groser or Nick Smith.

Between 1990 and 2011, New Zealand emitted an average of 0.1 percent of global net GHG emissions.

I tried again at the page Greenhouse gas concentrations. This page reported concentrations of greenhouse gas emissions recorded at Baring Head. Interesting but still no national emissions data.

However, i did find a widget enabling the embedding of a graph the Baring Head atmospheric carbon dioxide data record.

Nowhere from anywhere within the Te Taiao Aotearoa environmental indicator web pages could I find any mention of New Zealand's gross and net greenhouse gas emissions.

I resorted to doing a search of the Statistics website for greenhouse gases. That did turn up a web page showing New Zealand's greenhouse gases. That page clearly reported the trend with a prominent red cross.

Negative change. New Zealand’s net greenhouse gas emissions have increased 42 percent since 1990. New Zealand’s net greenhouse gas emissions increased 42 percent between 1990 and 2013. Total emissions increased 21 percent.

Another widget for embedding. A very plain graph. It uses a different greenhouse gas inventory report published earlier this year from my graphs for 1900 to 2012. The data for 1990 to 2013 uses a different way of calculating the carbon dioxide equivalent values for methane. This increases the year by year values by several million tonnes per year.

Still it just seems so bizarre to have statutory environmental indicators and to not include our national production of greenhouse gases. Especially since Statistics already had the data on it's web page. They need only to have put the link in. Is this cognitive dissonance, self-censorship or climate silence?

17 October 2015

New Zealand Gross & Net Greenhouse Gas Emissions 1990 to 2012

I have just prepared and revised a graph of New Zealand's gross and net greenhouse gas emissions for the years 1990 to 2012. I have recycled the style of the graph of gross emissions from 1861 to 2012.


I have used html code from the scalable vector graphic I uploaded to Wikipedia Commons and not the Blogger template. I think it gives a better quality graphic.

The data is from Ministry for the Environment publication New Zealand’s Greenhouse Gas Inventory 1990 – 2012, Report ME 1148, ISBN 978-0-478-41242-0, April 2014.

The data and R programming language script are available at Wikimedia Commons.

12 October 2015

How I made the graph of NZ agriculture and energy greenhouse gas emissions

Yes another post about my new line chart of gross greenhouse gas emissions in New Zealand.

I have just uploaded a SVG version to Wikimedia Commons. On that page there is a link to the data source on Robbie Andrew's website and the background to the data and it's use in a publication.

The scaled vector graphic looks like this when the suggested template from Wikimedia is used.NZ Gross GhG Emissions 1861 to 2012

And I have uploaded the R script I wrote to Google Drive. And here it is below via a Github Gist.

11 October 2015

Graph of New Zealands gross greenhouse gas emissions 1861 to 2012

Robbie Andrew has compiled a long term data set of energy and agriculture greenhouse gas emissions for New Zealand starting in 1861.

So obviously that prompted me to make a line chart.

This image is set at actual size of 535 pixels.