A big float story slipped under the HT radar a month ago. Luckily I noticed the NZ connection in a recent release from the Scripps Institute in California – designers and builders of many of the Argo float network – and so I bring you news of the completion of this ocean monitoring system and the big role played by NIWA and its research ship, the Kaharoa, in deploying the floats. Better late than never…
Tag: temperature
Let’s not blow the chance to lead change
More feedback on the NZ Insitute’s “fast follower” proposal, this time from business commentator Rod Oram in yesterday’s Sunday Star Times. Rod’s take is very similar to mine, though from a different perspective, and so I’m very pleased to welcome Rod as our third guest blogger – and reproduce that SST column in full. It’s a very good read…
Time to buy new wellies
Regular readers will know that I’ve been keeping a close eye on this year’s Arctic summer, and the record minimum sea ice extent reached last month (nice NASA picture here). The ice area is increasing now, but is still about 1m km2 below the same time last year. I might have to increase my bet… If all the summer Arctic sea ice disappears quickly, it won’t have any impact on sea level, but if the ice on land – mountain glaciers and the great ice sheets of Greenland and the Antarctic – melts, sea level will rise. During the last interglacial, about 125,000 years ago, global temperature was a degree or two warmer than today and sea level was about 5m higher. Some of that extra water came from Greenland and Antarctica.
When I was writing Hot Topic, the latest information suggested that Greenland was losing about 200 km3 (cubic kilometres) of ice every year, and Antarctica about 150 km3 (HT, p45). But time goes on, and the world warms. A study to be published in Geophysical Research Letters suggests that the glaciers of southeast Greenland are now losing 300 km3 of ice per year, a 400% increase in melt rate since 2004. AFP reports:
“Until 2004, the glacier mass in the southeastern part of the island lost about 50 to 100 cubic kilometres (12 to 24 cubic miles) per year. After this date, the melting rate accelerated to 300 cubic kilometres per year. It’s a jump of 400 percent, which is very worrying,†National Space Center head researcher and project chief Abbas Khan told AFP. […] The measurements indicated that the mountains hugging glaciers in the southeastern part of Greenland rose four to five centimetres (1.5 to two inches) per year, and that the banks of the glaciers thinned 100 metres per year.
Another Friday roundup
I’m a sucker for pretty computer graphics, especially if they’re didactic. Today’s discovery is a superb Flash animation of the sea level history of Australia and New Guinea, lovingly prepared by Monash University‘s new SahulTime project [ABC coverage here]. From the web site:
The concept of SahulTime is similar to GoogleEarth, except that SahulTime extends each of GoogleEarth’s paradigms through a further dimension in time. Satellite-style images change to reflect coastlines, the icons are time-aware, and even photographs can can be taken through a timewarp to view reconstructed ancient landscapes.
You drag a pointer back along a profile of how sea level has changed over the last 100,000 years, and watch how Australia’s coastline changes, merging with New Guinea. Fantastic. Can we have one for New Zealand, please?
Meanwhile…
- Al Gore’s film An Inconvenient Truth has been passed by a UK High Court judge as fit to be seen by UK schoolchildren, but only with changes to the accompanying teacher’s notes to clarify nine scientific “errorsâ€. News media are buzzing: a few samples – Herald, BBC, and Guardian (UK). The BBC’s environment correspondent provides some context, and Stoat (aka climate scientist and ice gambler William Connolley) looks at how serious the mistakes really are. The right wing roots of the court case are explained by Oil Change International, and one of the “expert†witnesses looks like it might have been the NZ CSC’s own Bob Carter. Not surprising then that former ACT MP Muriel Newman’s NZ Centre for Policy Research site is all over the issue – though she manages to find two extra bonus “errors†from somewhere. Read the judgement in full here. Real Climate’s original review supports the judge’s finding that AIT gets the basic science right.
- New Scientist reports on a Canadian study that finds that to keep global temperature under the EU’s target of 2C above pre-industrial levels, cuts of 90% of emissions will be needed by 2050, much deeper than the 50% reductions already promised.
- The new edition of popular computer game SimCity is to feature global warming, offering players high and low carbon energy options – sponsored by BP. A sign of the times….
Biofuels to fly, and other stories
Air New Zealand is carefully positioning itself as a climate-friendly airline with its latest announcement that it is to trial biofuels in a 747 flight from Auckland in the next couple of years. Working with Boeing, Air NZ will be part of the first commercial trial of biofuel, in a Rolls-Royce-powered jumbo in the next 18 months . The flight will only use biofuel in one engine, and will not carry customers. [Stuff, Herald, BBC, June HT blog on aviation biofuels].
- Consents are close on a tidal energy trial in the Cook Strait, while Orkney is establishing itself as European leader for tidal and wave power research.
- The NSIDC provides a roundup on this season’s Arctic sea ice collapse, while NASA finds that the loss of multi-year ice plays a large role in ice loss, and warns that sea ice modelling needs some rapid revision. Meanwhile James Hansen suggests to Reuters that a crucial trigger point may have been passed in the Arctic, and a perceptive journalist on the San Diego Union-Tribune notices that loss of sea ice has big implications for the SW USA. [Update 3/10: Andy Revkin has a very good piece in today’s New York Times: the interactive graphic of the Arctic is especially good.]
- A warming world is bad news for rice production, the Indian Agricultural Research Institute has found. Crop yields would be reduced by 10% for every 1ºC temperature increase during the growing season.
- British PM Gordon Brown and Helen Clark have agreed to work together to ensure that the NZ and European carbon markets are “compatible