Posts tagged "IPCC"

IPCC special: Future climate phenomena and regional climate change

The latest report of Working Group I of the Intergovernmental Panel on Climate Change (IPCC) combines new and better observations with improved models to provide a clearer and more definite picture of humanity’s influence on the climate system, and the paths we can choose for the future. The atmosphere continues to warm, with the last three decades each being warmer than the one before, and all three being warmer than any other decade since reliable observations began in the 1850s. Warming is seen almost everywhere on the Earth’s surface, and many observed changes are unprecedented on scales of decades to millennia. We also now have...

IPCC special: Long-term climate projections

Chapter 12 of the 5th Assessment Report of IPCC (Intergovernmental Panel on Climate Change) deals with future projections of climate change in the long-term. Long-term in this case means beyond the middle of the 21st century when the projections start to depend more strongly on the pathway or scenario of emissions of greenhouse gases, principally CO2. We rely extensively on computer models of the climate system for this as, obviously, there are no observations of the future. While computer models are not completely accurate in their ability to project future climate change, it is possible to use our understanding of the climate system to assess uncertainties...

The Anthropocene: our place in Earth’s history

The Anthropocene – the concept that the Earth’s surface geological processes are now human-dominated – is often considered to be more or less synonymous with climate change.  Today, however, climate change is only one component – relatively minor, still – of the changes to the Earth system invoked to justify the Anthropocene.  However, the last couple of centuries have seen large and accelerating changes in some of the key factors that drive global climate, and it is widely agreed among scientists that climate change has begun.  In future decades, centuries and millennia, climate change seems likely to emerge as a central driver of changing geological process on Earth. The...

Beyond the science: Facing the challenge of climate change

Climate change is one of the defining challenges of the 21st century, along with global population, poverty alleviation, environmental degradation and global security. The problem is that ‘climate change’ is no longer just a scientific concern, but encompasses economics, sociology, geopolitics, national and local politics, law, and health just to name a few. But with so many other problems in the world should we care about climate change? What we are finding is that if we do not produce win-win solutions then climate change will make all our other problems worse.   Human induced Climate Change We have strong evidence that we have been changing...