Blog Archives

Understanding the Science of CO2’s Role in Climate Change: 3 – How Green House Gases Trap Heat

December 7, 2009
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Understanding the Science of CO2’s Role in Climate Change: 3 – How Green House Gases Trap Heat

This post, the 3rd (1st here, 2nd  here) in the series on Understanding the Science of CO2’s Role in Climate Change, discusses how water vapor, CO2, CH4, O3 and N2O  absorb and emit the Earth’s longwave radiation, changing the Earth’s energy balance. I’ve made a 5 panel chart that shows spectra data for 5  greenhouse

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Solar Trends: Comparison of TSI and GISS Temperature Anomaly Trends

October 8, 2009
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Solar Trends: Comparison of TSI and GISS Temperature Anomaly Trends

This post continues my analysis of solar trends, this time comparing reconstructed total solar irradiance (TSI) and temperature anomaly (GISS) trends for the 1880 – 2009 period. I use 11 year moving averages to smooth both series so that we can see the longer term trends.   Links to a download-able copy  of my

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Solar Trends: Total Solar Irradiance Since 1611 – Update

September 23, 2009
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Solar Trends: Total Solar Irradiance Since 1611 – Update

This is the 2nd in a series of  posts I will be doing on solar trends. In this post, I show how to retrieve online daily satellite and reconstructed TSI data,   plot the daily data as well as annual and 11 year moving average smooths for the data series.  Links to

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Solar Trends: Sunspot Numbers Since 1749

September 17, 2009
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Solar Trends: Sunspot Numbers Since 1749

This is the 1st in a series of  posts I will be doing on solar trends. In this post, I show how to retrieve online monthly sunspot data back to 1749, calculate average annual sunspot numbers (SSN),  plot the monthly and annual average SSN as well as a lowess smooth, add the Solar

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CO2: Emissions & Changes in Atmospheric Levels

September 11, 2009
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CO2: Emissions & Changes in Atmospheric Levels

In previous posts, I have shown the 1750-2008 global CO2 emission trends and the atmospheric CO2 concentrations at Mauna Loa, Hawaii. In this post, I compare annual CO2 emissions with annual changes in atmospheric CO2.  The resulting chart shows the portion of CO2 emissions that remains in the atmosphere and the portion that

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Global Mean Sea Level Trends

September 6, 2009
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Global Mean Sea Level Trends

In this post, I show an R script that downloads the University  of Colorado, Boulder’s 1993-2009 global mean sea level (msl) change (link) data, converts the ASCII file into a usable R data frame, calculates moving average and msl change  trend rate and develops a trend  chart that shows msl change  and trend rates

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Global Sea Surface Temperature Trends (1850-2009)

September 4, 2009
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Global Sea Surface Temperature Trends (1850-2009)

In this post, I show an R script that downloads the Hadley Centre’s 1850-2009 monthly sea surface temperature (HadSST2) anomaly data, converts the ASCII file into 2 usable R data frames, calculates overall and post 1980 SST anomaly trend rates and develops a 2 panel chart that shows SST anomalies and trend rates and the

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CO2 and Temperature Trends

August 31, 2009
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CO2 and Temperature Trends

In a previous post I discussed problems with an Excel based CO2 and temperature trend chart that used 2 Y axes. Double axis charts can be misleading because they may distort the Y axis for one of the series. In this post I show another example of am ineffective double Y axis CO2 and temperature

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CO2 Emission Trends

August 23, 2009
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CO2 Emission Trends

“Since 1751 approximately 329 billion tons of carbon have been released to the atmosphere from the consumption of fossil fuels and cement production. Half of these emissions have occurred since the mid 1970s. The 2006 global fossil-fuel carbon emission estimate, 8230 million metric tons of carbon, represents an all-time high and a 3.2% increase

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