Climate Change was defined by the 1992 Framework Convention on Climate Change (FCCC) in Article 1, as follows:
“a change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods”The 165 countries who signed the Convention accepted this definition as legally binding.
Here, the term Climate Change applies only to a change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere but it is in ADDITION to natural climate variability observed over comparable time periods”
This definition makes a distinction between natural variability whose change is merely observed and a change of climate which alters the composition of the global atmosphere, which can also be attributed directly or indirectly to human activity.
It does not seem to matter who carries out this attribution or whether it is directly or indirectly.
The Intergovernmental Panel on Climate Change (IPCC) provided another definition as follows:
“Climate change in IPCC usage refers to any change in climate over time, whether due to natural variability or as the result of human activity”This appears as a footnote to the first page of the “Summary for Policymakers” in Reports No 3 and 4 and presumably applies to their title.
It is not a proper definition as it only refers to any change in climate over time. But it does not talk about attribution even if they go ahead and do it in practice.
So, any change of climate is Climate Change. Why do they need a definition at all?
The FCCC admits that the IPCC has a different definition of climate change as follows:
Definitions of climate change
In 3rd, 4th and also the latest 5th IPCC Report (2013) the Glossary says
Climate change refers to a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties, and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic eruptions and persistent anthropogenic changes in the composition of the atmosphere or in land use. Note that the Framework Convention on Climate Change (UNFCCC), in its Article 1, defines climate change as “a change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods”. The UNFCCC thus makes a distinction between climate change attributable to human activities altering the atmospheric composition, and climate variability attributable to natural causes.
Weather forecasting provides a service which is considered to be reliable only for a week or two in advance, This is the result of a lack of adequate understanding of the behaviour of fluids and their chaotic behaviour, Since this finding applies to a combination of climate change attributable to human activities altering the atmospheric composition, and climate variability attributable to natural causes it seems unlikely that a concentration on the first one alone is going to help forecasters to get beyond current limitations.
The 5th Report claims that they can simulate both components of climate change and project both of them until the year 2100. In their Annex 1 they provide 82 pages of comprehensive global and regional projections. This is their introduction:
This Annex presents a series of figures showing global and regional patterns of climate change computed from global climate model output gathered as part of the Coupled Model Intercomparison Project Phase 5 (CMIP5; Taylor et al., 2012). Maps of surface air temperature change and relative precipitation change (i.e., change expressed as a percentage of mean precipitation) in different seasons are presented for the globe and for a number of different sub-continental-scale regions. Twenty- year average changes for the near-term (2016-2035), for mid-term (2046-2065), and for the long-term (2081-2100) are given, relative to a reference period of 1986-2005. Time series for temperature and relative precipitation changes are shown for global land and sea averages, the 26 sub-continental SREX regions (IPCC, 2012)
Complementary methods for making quantitative projections, in which model output is combined with information about model performance using statistical techniques, exist and should be considered in impacts studies (see Sections 9.8.3, 11.3.1 and 12.2.2â€“12.2.3). While results from the application of such methods can be assessed alongside the projections from CMIP5 presented here, it this is beyond the scope of this Atlas. Nor do the simple maps provided represent a robust estimate of the uncertainty associated with the projections. Here the range of model spread is provided as a simple, albeit imperfect, guide to the range of possible futures (including the effect of natural variability). Alternative approaches used to estimate projection uncertainty are discussed in Sections 11.3.1 and 12.2.2â€“12.2.3. The reliability of past trends is assessed in Box 11.2, which concludes that the time series and maps cannot be interpreted literally as probability density functions. They should not be interpreted as `forecasts'
This is an impressive exercise. The snag here is that they do not mention how they can project natural variability (highlighted)
The following Figure (FAQ1.1 Fig 1) is a summary of the IPCC uncertainties. It should be noted that the boundaries are those of 90% significance. This is below the more usual figure of 95% commonly applied in the scientific literature and it means that there is a 10% chance of any value falling outside these bounds.
The UK Met Office at http://www.metoffice.gov.uk/about-us/who/accuracy/forecasts has given some typical figures
93.7% of maximum temperature forecasts are accurate to within +/- 2°C on the current day (36-month average 84.0 % of minimum temperature forecasts are accurate to within +/- 2°C on the first night of the forecast period (36-month average).These actual forecasting inaccuracies are in a completely different universe from the supposed inaccuracies of the IPCC which claims to incorporate them. They feel proud if they can get near ±2ºC. which is way above the claimed IPCC accuracy of their global temperature of a fraction of a degree.
89.8% of maximum temperature forecasts are accurate to within +/- 2°C on the next day (36-month average). 79.5% of minimum temperature forecasts are accurate to within +/- 2°C on the second night of the forecast period (36-month average).
• They are still based on completely unrealistic models of the climate where
The earth is flat,
The sun shines all day with the same intensity
There is an energy balance of radiant energy entering and leaving
No work is done on the system
• They do not have a plausible temperature record from which they could judge their projections.
• The few projections which have been compared with reality have falsified the model
(see Newsletter No 324X)
• Intervention in weather forecasting has been disastrous
• According to the above graph the overall global projections are already in trouble
• My previous Newsletter (324X) shows that their models have been falsified.
Therefore they should be rejected.
CONCLUSIONThere are two definitions of Climate Change.
- The Framework Convention on Climate Change (FCCC), and the nations who signed it, accept a definition of Climate Change that ir means only changes of climate caused by human emissions of greenhouse gases.
- The Intergovernmental Panel on Climate Change (IPCC), the body which is supposed to advise the FCCC and the signatories, use a definition of Climate Change that includes any change in climate over time, whether due to natural variability or as a result of human activity. Any failure of their projections to comply with current or recent climate properties may therefore be due to deficiencies in the projections of both the natural and supposed human effects as in the IPCC definition of climate change, not the FCCC definition which is concerned only with human effects.
- The published projections fail completely to take account of the inherent uncertainties of natural variabilility which is supposedly incorporated in them.