Population explosion of coral-eating starfish, storms and acidification of oceans causing rapid decline, study finds
Alok Jha, science correspondent 1 October 2012
|כוכבן קוצני – התמונה מויקיפדיה|
Crown-of-Thorns starfish near Qamea Island in Fiji.Matt Wright
| עדיין יש אלמוגים בשונית המחסום הגדולה אבל המצב הולך ומתדרדר מקור: וקיפדיה|
A variety of corals form an outcrop on Flynn Reef, part of the Great Barrier Reef near Cairns, Queensland, Australia.
We calculate that 100 months from 1 August 2008, atmospheric concentrations of greenhouse gases
will begin to exceed a point whereby it is no longer likely we will be able to avert potentially irreversible climate change. 'Likely' in this context refers to the definition of risk used by the Intergovernmental Panel on Climate Change (IPCC) to mean that, at that particular level of
greenhouse gas concentration, there is only a 66 - 90 per cent chance of global average surface
temperatures stabilising at 2º Celsius above pre-industrial levels.
Once this concentration is exceeded, it becomes more and more likely that we will overshoot a 2º C level of warming. This is the maximum acceptable level of temperature rise agreed by the European Union and others as necessary to retain reasonable confidence of preventing uncontrollable and ultimately catastrophic warming. We also believe this calculation to be conservative. The reasons why and the assumptions behind our conclusion are detailed below.