Friday, July 26, 2013

UN IPCC climate report casts doubt on claims that global warming is hiding in oceans, says computer model simulations of oceans absorbing heat have errors and are unreliable-Chapter 8

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"These errors in oceanic heat uptake will also have a large impact on the reliability of the sea level rise projections."

"Climate Change 2007: Working Group I: The Physical Science Basis"

"8.3.2.2.2 Southern Ocean circulation"

"The Southern Ocean wind stress error has a particularly large detrimental impact on the Southern Ocean simulation by the models. Partly due to the wind stress error identified above, the simulated location of the Antarctic Circumpolar Current (ACC) is also too far north in most models (Russell et al., 2006). Since the AAIW is formed on the north side of the ACC, the water mass properties of the AAIW are distorted (typically too warm and salty: Russell et al., 2006). The relatively poor AAIW simulation contributes to the multi-model mean error identified above where the thermocline is too diffuse, because the waters near the base of thermocline are too warm and salty.

It is likely that the relatively poor Southern Ocean simulation  

will influence the transient climate response to increasing greenhouse gases by affecting the oceanic heat uptake. 

When forced by increases in radiative forcing, models with too little Southern Ocean mixing will probably underestimate the ocean heat uptake; models with too much mixing will likely exaggerate it. 

These errors in oceanic heat uptake will also have a large impact on the reliability of the sea level rise projections. See Chapter 10 for more discussion of this subject."

These errors in oceanic heat uptake will also have a large impact on the reliability of the sea level rise projections. - See more at: http://drtimball.com/2012/climate-change-of-the-ipcc-is-daylight-robberyclimate-change-of-the-ipcc-is-daylight-robbery/#sthash.NPpfRBl2.dpuf

The third robbery involves Summary claims that computer models are scientifically sound. Media focus on temperature projections invariably putting the highest increase in the headlines. These projections are predetermined, and always wrong. The Science Report explains why they cannot be correct. Here are 17 quotes from Chapter 8 of the 2007 Science Report.
Nevertheless, models still show significant errors. Although these are generally greater at smaller scales, important large-scale problems also remain.
Due to the limited resolutions of the models, many of these processes are not resolved adequately by the model grid and must therefore be parametrized. The differences between parameterizations are an important reason why climate model results differ.
Since the TAR, there have been few assessments of the capacity of climate models to simulate observed soil moisture. Despite the tremendous effort to collect and homogenize soil moisture measurements at global scales (Robock et al., 2000), discrepancies between large-scale estimates of observed soil moisture remain.
The global Aerosol Model Intercomparison project, AeroCom, has also been initiated in order to improve understanding of uncertainties of model estimates, and to reduce them (Kinne et al., 2003).
- See more at: http://drtimball.com/2012/climate-change-of-the-ipcc-is-daylight-robberyclimate-change-of-the-ipcc-is-daylight-robbery/#sthash.6pNGA4xq.dpuf
The third robbery involves Summary claims that computer models are scientifically sound. Media focus on temperature projections invariably putting the highest increase in the headlines. These projections are predetermined, and always wrong. The Science Report explains why they cannot be correct. Here are 17 quotes from Chapter 8 of the 2007 Science Report.
Nevertheless, models still show significant errors. Although these are generally greater at smaller scales, important large-scale problems also remain.
Due to the limited resolutions of the models, many of these processes are not resolved adequately by the model grid and must therefore be parametrized. The differences between parameterizations are an important reason why climate model results differ.
Since the TAR, there have been few assessments of the capacity of climate models to simulate observed soil moisture. Despite the tremendous effort to collect and homogenize soil moisture measurements at global scales (Robock et al., 2000), discrepancies between large-scale estimates of observed soil moisture remain.
The global Aerosol Model Intercomparison project, AeroCom, has also been initiated in order to improve understanding of uncertainties of model estimates, and to reduce them (Kinne et al., 2003).
- See more at: http://drtimball.com/2012/climate-change-of-the-ipcc-is-daylight-robberyclimate-change-of-the-ipcc-is-daylight-robbery/#sthash.6pNGA4xq.dpuf


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