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28 Sep, 7 tweets, 3 min read
Vote albatross! (Yes that is the right one, but pic was in Nzud.) Image
Is very much an Australian bird -- it breeds on three little islands in Tasmania and nowhere else, anywhere: Albatross Island, Pedra Branca, and the Mewstone.

theguardian.com/environment/ng… Image
Like here (Pedra Branca, WP): Image
Lots of incorrect photos around the web of (Tasmania's) Mewstone. This is it:
acap.aq/news/news-arch… Image
Albatross Island is a gentler place.
wwf.org.au/news/blogs/in-… Image
Vote early vote often (no, really, you're supposed to):
theguardian.com/environment/ng… Image
If youse don't vote soon the poor little Aussie battler **shy albatross** will be cut. Vote now!
theguardian.com/environment/ng…

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More from @Gergyl

Gerg Profile picture
29 Sep
Don't like this old calculation that I've quoted several times recently? Coal-fired power stations are thermodynamic heat engines; they do not get to break the laws of physics. The maximum achievable thermodynamic efficiency depends on the ratio of the absolute temperatures...
…The ratio of the (Kelvin) temperature of the 'cold side' of the engine (~condensing steam in the condenser) to that of the 'hot side' (~the hottest steam in the boiler). Under idealised low-heat-flow conditions, the well-know Carnot formula applies:

ηₘₐₓ = 1 - Tc/Th
...But under more realistic high-flow conditions, it becomes the square root of the temperature ratio, which is what I applied:

ηₘₐₓ = 1 - √(Tc/Th)
Read 11 tweets
Gerg Profile picture
29 Sep
'High-efficiency low-emissions' (HELE) coal-fired power is an outright lie. Each time you hear some politician spruiking it, ask who is paying them, what have they been promised, who are they working for (hint: it isn't you).
We've been over this ground so many times, but still they flog it. Things:
1. Australia already has multiple 'higher-efficiency' supercritical coal-fired power stations. They're our newest and *least reliable*: Callide C (currently broken), Kogan Creek (breaks often), Millmerran.
2. What liars ('proponents') are mostly talking with HELE is 'ultra-supercritical' -- slightly higher steam temperature and pressure than standard supercritical. The extra efficiency gain from that is *small*, about 5%.

Is the simplest of thermodynamics:
Read 6 tweets
Gerg Profile picture
29 Sep
#Ozsnow Spencers Creek; data from @snowyhydro at snowyhydro.com.au/generation/liv….

Is finishing up quite a fat season by modern standards, even though it will only have been above the average curve for two weekly measures. Image
Gain and loss: Image
Deep Creek with one more little blip. Image
Read 6 tweets
Gerg Profile picture
29 Sep
That Science Show segment from Karlie Noon and Corey Tutt was just ghastly. How, still, after all this time, are we still doing this? Australian is deeply, fundamentally racist at levels that are incomprehensible to me.

abc.net.au/radionational/…
...And sexist. Apart from anything else, it's a vast societal and economic waste to not make the best of every child, every student, at every school, especially at every public school. Why do we not see this? Why can't we manage it? WTF is wrong with us.
Sure, some will manage to achieve anyway. What about the rest? Yet we still spend bulk public funds on wealthy private schools that:
1. Do not educate most students
2. Do not educate the most challenging students
3. Waste our limited resources on grandiose pretence.
Read 5 tweets
Gerg Profile picture
28 Sep
ABC 'Back to Nature' -- wonderful pics; absolute crap commentary. Is she making it up as she goes along, cherry picking half-baked nonsense stories?
Once again, how drones have transformed filmmaking, and not just docos.
'Finke River on the same course as 100 million years ago' ...really, maybe cite? The world was an unrecognisably different place 100 million years ago – 10-15°C hotter than now, with crocodiles and turtles living near the north pole. Australia was still connected to Antarctica! Image
Read 5 tweets
Gerg Profile picture
28 Sep
COVID sewage detections continue to spread in NSW -- the result of Berejiklian-Barilaro's refusal to effectively cordon Sydney, three months ago. Eventually that will all be red.

health.nsw.gov.au/Infectious/cov… Image
How does this game play, post 11-October (13 days away)? Might not be pretty.
thenewdaily.com.au/news/state/nsw…
Spread... (Note the start date.)
Read 6 tweets

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