This is Aksel Gasbjerg's Typepad Profile.
Join Typepad and start following Aksel Gasbjerg's activity
Aksel Gasbjerg
Recent Activity
Excuse being off topic but i have a pressing question.
Assumptions in a thought example:
The air today contains 400 ppm CO2
We will emit 40 gt CO2 in the coming year, of which 20 gt ends in the air and 20 gt ends in the ocean/land.
The emissions result in an increase of 2 ppm to 402 ppm CO2 in a year.
With these assumptions (and of course, Ceteris Paribus) I have the following questions:
If tomorrow we cut CO2 emissions from 40 to 20 gt, what are ppm in a year?
If we stop total CO2 emissions tomorrow, what are ppm in a year?
Excellent melting season summary
It was posted on Mongabay yesterday and written by Gloria Dickie. --- At 2017 minimum, scientists ask: Is Arctic entering the Thin Ice Age? The sun reflects over thin sea ice and a few floating icebergs near the Denmark Strait off of eastern Greenland, as seen from NASA’s P-3B aircraft on Apri...
Hans
NOAA has issued a preliminary growth rate for 2016 at 2,77 ppm.
https://www.esrl.noaa.gov/gmd/ccgg/trends/gr.html
At the web-site you can see NOAA's special way of calculation the growth rate. It is the growth in the average for the 4 months around 1. jan (that is nov, dec, jan, feb) to the same 4 months in the next year.
That is why NOAA first have the real growth rate after february. (The press release from NOAA last year with the announcement of the growth rate at 3,05 ppm for 2015 was issued 9. march 2016.)
To me it is a slightly odd way to calculate growth rate. If you see the annual mean for the last years (NOAA, MLO):
2014 398,65
2015 400,83
2016 404,21
I would say that the growth rate from 2014 to 2015 is 2,18 ppm (and not 3,05), and growth from 2015 to 2016 is 3,38 ppm (and not 2,77).
PIOMAS February 2017
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: Things just keep getting worse. After this year's trend line went well below all others last month, I...
Aksel Gasbjerg is now following Neven
Aug 13, 2013
Aksel Gasbjerg is now following The Typepad Team
Aug 13, 2013
Subscribe to Aksel Gasbjerg’s Recent Activity