Author: Gareth

Long way around the sea

With the northern hemisphere summer fading into autumn, time for a quick overview of Arctic events. The sea ice is nearing its annual low point, and appears to be heading for a minimum somewhere between 2009 and 2008 — 2007’s record minimum appears to be beyond reach. The latest batch of forecasts for the SEARCH exercise mostly agree, but it’s still a bit early to make a final call — reductions in extent can continue right up to the end of the month. This graph of sea ice extent (from the University of Bremen) puts the current situation in context (click to see a large, updated version):

Bremenextent030910.gif

Now let’s see what that data looks like on a map…

Continue reading “Long way around the sea”

The Quadruple Squeeze

Required viewing: Johan Rockström of the Stockholm Resilience Centre talking at TEDGlobal 2010 about the “quadruple squeeze” we’re putting on the planet through overpopulation, climate change, ecosystem loss and the problem of surprises — tipping points in the system. Rockström was lead author on last year’s Nature paper on planetary boundaries and is an interesting and compelling presenter. Bottom line? We face a huge challenge, but there are ways we can fix the problem… [Hat-tip to Resilience Science]

IPCC report: done well, could do better

The InterAcademy Council report on the IPCC — Climate Change Assessments: Review of the Processes and Procedures of the IPCC — released yesterday, calls for “fundamental reforms” to the IPCC’s management structure and review processes. Climate Central provides a useful summary of the key findings:

  • The IPCC should create an Executive Committee to run the organization in between major conferences.
  • Rather than have the IPCC director serve for two six-year terms, a new director should be appointed for each major assessment report (there have been four so far). Since the IPCC is well into the fifth assessment, it isn’t clear whether Dr. Pachauri will step down (he’s evidently said that any decision will have to wait for the next IPCC meeting, in Korea in October).
  • The reviewers who decide what makes it into the final report and what doesn’t should work harder to address comments from authors, and to let dissenting views be reflected more fully in the finished product.
  • Statements about certainties and uncertainties about climate science need to be more explicit, need to be based on a more uniform set of criteria, and need to be clearer about how they were calculated.
  • The IPCC in general needs to be more open and transparent about how it goes about its business.
  • The IPCC needs to improve the way it deals with so-called “grey literature”– that is, non-peer-reviewed reports that contain valuable information, but which haven’t already been subjected to strict scientific scrutiny.

Professor Martin Manning, Director of the Climate Change Research Institute at Victoria University of Wellington told the Science Media Centre that he welcomed the report:

The IAC has run a detailed review of the process used by the IPCC for assessing scientific understanding and this has produced a number of useful comments that I think most climate scientists will agree with. Their report accepts that scientific understanding of climate change is developing rapidly and this means that the process for assessing it for policymakers needs to become more dynamic.

More reaction: Roger Harrabin at the BBC, Guardian, New Scientist, plus the UN webcast of the press conference is here.

My take? It would be a miracle if a 22 year old organisation with minimal full-time staff that has seen its raison d’être move up to the top of the list of global priorities couldn’t be improved. The suggestions look sensible, and if they help to defuse the continuing attacks from the usual suspects, so much the better.

The secret migration

Acouple of weeks ago, a comment on carbon footprints and immigration kicked off a brief exchange of views on New Zealand’s vulnerability to climate-forced migration. It’s an interesting subject, worth more attention, and so in this post I’m going to set out how I see NZ’s position in the context of the likely future flows of climate-forced migration.

Let’s start by defining the probable sources of migrants. The first and most obvious are refugees forced to move by climate impacts. The horrendous situation in Pakistan gives some idea of the sheer scale of the problems likely to be faced by some of the world’s most populous and least-wealthy countries. Here’s how the New York Times describes the situation in Pakistan:

Initial estimates for the scale of damages and human suffering for Pakistan’s worst flooding in 80 years, is larger than the 2004 Indian Ocean tsunami, 2005 Kashmir earthquake, 2008 Cyclone Nargis disaster in Burma and 2010 Haitian earthquake — combined.

Each of the great Asian megadeltas — in Bangladesh, Myanmar, Thailand, Vietnam and China — could face similar problems if the Asian monsoon intensifies further, or if sea level rise picks up pace. The potential for tens of millions of people to be made homeless, to start a desperate search for dry land and food is obvious — but that’s not where New Zealand’s principal vulnerability lies.

Continue reading “The secret migration”

Questionnaire

The Cognitive Science Lab at the University of Western Australia has put together an internet survey to test people’s attitudes to science. Prof Stephan Lewandowsky describes it thus: “the rationale behind the survey is to draw linkages between attitudes to climate science and other scientific propositions (eg HIV/AIDS) and to look at what skepticism might mean (in terms of endorsing a variety of propositions made in the media)”. He’s particularly interested in the views of people who follow science blogs, so please go along and give it a try. Anonymity assured, and the results will find their way into the literature eventually.

[Rutles, if only for the lyrics…]