Category Archives: Climate Science

Our beds are burning

Ask yourself a simple question. Can you give hope to future generations that the Great Barrier Reef will be protected if your policy is to limit warming to 1.5°C when the GBR is already disappearing before our eyes?

With about 1.1°C of warming we are told that Unprecedented fires in California and Australia signal the dawn of the ‘fire age’. Richard Flanagan talks of a Tasmanian rainforest burnt in 2018, now desolate shale with no sign of regrowth.

As I write, pristine Fraser Island is burning on a front about 46 km long, with reports that water from water bombers is evaporating before it hits the ground.

We have now reached a point where the cost of insurance alone in flood and bushfire-prone communities makes it impossible to live there.

Dangerous climate change is already here.

How can we set a target of 1.5°C temperature (actually a 50% chance of limiting the increase to that level) when we know that during the Eemian interglacial sea levels rose 6-9 metres with 300ppm of CO2, and we have already broken through the 410 ppm? Continue reading Our beds are burning

Four graphs that matter in the climate emergency: bonus edition

This is an updated version earlier post, slightly shorter, where I have deleted some material in favour of new material, especially towards the end, and sharpening some points along the way.

First graph

Greta Thunberg, the girl who can’t quit, said:

    The emissions are increasing and that is the only thing that matters.

This is what was shown for July 01, 2019 at Muana Loa:

Continue reading Four graphs that matter in the climate emergency: bonus edition

Climate emergency – an existential risk requiring action

Time to declare a climate emergency is now. Arguably we should have done so when James Hansen addressed the US senate in 1988. Twenty years later he was judged to have got it right.

This post started as life a new Climate clippings, so it follows that format. It looks at scientific reticence in relation to mainstream climate science, how the real urgency of the climate situation is moving to the centre from the periphery in climate science, and where we find ourselves now especially in relation to emissions, temperature and sea level rise. Continue reading Climate emergency – an existential risk requiring action

Labor needs to rethink the climate emergency

I pinched that cartoon from the Townsville Bulletin from Facebook, where it was doing the rounds. I think it’s tragic rather than funny, but may go some way to explain why Labor, in Queensland and federally, is over-reacting to the ‘message’ that was sent on Adani, and the prospect of jobs flowing from the resources industry as against climate change and saving the planet. Both Queensland and federal Labor appear to be caving in to coal interests, and both appear to be clueless about the urgency of the climate emergency. Continue reading Labor needs to rethink the climate emergency

Cloud tipping point could yield a cataclysmic 14°C warming

Clouds could trigger a feedback effect. Stocktrek Images, Inc. / Alamy Stock Photo

Commonly 2°C has been seen as the threshold for dangerous climate change, although last year the IPCC report on 1.5°C revealed that at that lower level we enter a zone where tipping points may take us to 4°C and beyond.

Levels of 4°C threaten civilisation as we know it. At 6°C we worry about the survival of the human race. However, at that point Tapio Schneider and his team at the California Institute of Technology, Pasadena, have found that there may be a further tipping point which heats the planet another 8°C to make it 14°C above pre-industrial levels (New Scientist, so probably pay-walled.)

How is this so? Continue reading Cloud tipping point could yield a cataclysmic 14°C warming

What would give hope to Greta Thunberg, the girl who can’t quit?

Greta Thunberg … ‘I have always been that girl in the back who doesn’t say anything.’ Photograph: Michael Campanella/The Guardian

Photo and story from The Guardian.

She was asked to talk to the billionaire entrepreneurs in Davos.

    “I don’t want you to be hopeful. I want you to panic. I want you to feel the fear I feel every day. And then I want you to act,” she told them.

Continue reading What would give hope to Greta Thunberg, the girl who can’t quit?

Climate change by the numbers

In 1999 NASA lost its $125-million Mars Climate Orbiter because spacecraft engineers failed to convert from Imperial to metric measurements when exchanging vital data before the craft was launched. Numbers are important!

When Michael Le Page attempts to sort out the numbers in climate science (probably pay-walled) it’s not as straight forward as you might think. For starters we are given this image:

When ice melts, sea level rises – but how much, and how fast? Paul Nicklen/National Geographic Creative

Sorry, when floating ice melts the sea level does not rise. The caption is misleading. Continue reading Climate change by the numbers

Cool patch below Greenland is bad news

Two years ago this month I posted Global temperature, the North Atlantic cool patch and the Gulf Stream. The cool patch was still there, lasting throughout the 2018 northern summer:

This now needs to be recognised as an enduring feature associated with the slowdown of the overturning ocean circulation AMOC (Atlantic Meridional Overturning Circulation) which James Hansen and Makiko Sato say is having an effect on the east coast hurricanes which have been so prominent during this summer. Continue reading Cool patch below Greenland is bad news

The die is cast – Turnbull chooses political power over the future of the planet and humanity

Here are the last four feature articles from Giles Parkinson at RenewEconomy (as of last weekend):

It’s quite likely that politicians don’t read RenewEconomy. Here’s Ben Potter in the last Weekend AFR:

Continue reading The die is cast – Turnbull chooses political power over the future of the planet and humanity

Climate scientist with God on her side

Or it may be God with climate scientist on her side. Whichever, Katharine Hayhoe is one smart lady. A New Scientist interview (no doubt pay-walled) caught my interest.

There is a longer interview at Carbon Brief which rewards reading. She’s one of the most informed, balanced and insightful climate scientists I’ve come across. Continue reading Climate scientist with God on her side

Hansen got it right

In 1988 James Hansen gave his famous testimony to the US Senate. For the short story, go to Tamino at Open Mind. For the longer story, Gavin Schmidt at RealClimate, plus the commentary thread is best.

Hansen told the politicians that our production of greenhouse gases, principally CO2, N2O, CH4 and CFC, were warming the climate. He said temperatures would go up in the coming years: Continue reading Hansen got it right