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To use 'estimators,' click on one of the above; then highlight (select) the current value in any yellow box, type in your new value and press the 'Tab' key or 'Enter' key - other colored boxes on the estimator will then update automatically.

(These 'C3' tools require that 'Flash' plug-in be installed with preferred browser; the 'estimators' work with IE, Firefox, Chrome & Opera; Safari browser has not been tested; and, mobile phones and tablets without Flash installed won't be able to use the 'tools.')

These "quick & dirty" calculators/estimators marked 'Simple' primarily use: this HadCRUT4 annual dataset; this 1965-2012 CO2 emission tonnage dataset, this pre-1965 CO2 tonnage derived from this annual carbon dataset; this annual CO2 ppm post-1957 from this NOAA dataset, and the annual pre-1958 ppm values from this dataset.

The 'Simple' calculators/estimators utilize simple arithmetic/math (i.e. no logarithms, calculus and etc.); nor do they incorporate any climate science assumptions (i.e. climate sensitivity, forcings, etc.).

The 'Simple' estimators do assume that all human CO2 emission tonnes remain in the atmosphere for hundreds to thousands of years, and that all "warming" is due to human CO2 emissions, which are both essential to the claims of catastrophic global warming alarmism (CAGW).

The math used by the simple tools is essentially adding/subtracting/multiplying/dividing annual temperature, ppm and CO2 tonnage data to produce the calculated/estimated results. These are rough estimates being produced, not predictions.

Unless otherwise specified, datasets spanning from 1850 to 2012 are utilized. Several of the 'estimators' use 396.5 ppm as a 'Start' value - this figure is NOAA's measurement of the mean CO2 ppm value for 2013.

The **enhanced** global temperature estimator utilizes a formula [climate sensitivity x the natural log of 'ending' CO2 ppm value divided by the 'starting' CO2 ppm value (CS*ln(CO2end/CO2start)] representing the known logarithmic temperature response of increasing levels of CO2 in the atmosphere. This estimator includes an input box for climate sensitivity. Depending on the climate sensitivity input chosen, this estimator has potential to better estimate temperature changes versus the 'simple' calculators based just on historical empirical measurements. (Formula used is described on page 30 of this PDF and here.)

Also, the **enhanced** global temperature estimator includes a calculation for CO2 tonnes required to reach the temperature impact (per the climate sensitivity inputted and the logarithmic response due to the 'Start' and 'End' CO2 values inputted). From the calculated estimate of 'global temperature impact,' the 'tonnes' are then estimated based on empirical evidence (since 1850) for the historical degree(°C) per tonne required.

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Previous estimators (soon to be deleted) that are being replaced by ones above.

Simple Global Temp Est. (vs. Hansen model)

Simple CO2 Mitigation Calculator

Simple Global Temperature Estimator

Simple Cost Estimator For Reducing Global Temperature By Degree

Simple Cost Estimator For Reducing Atmospheric CO2 Level By PPM