Measurement of Pre-Industrial CO2 Levels

By Dr Timothy Ball

A major part of the focus on human produced CO2 as the cause of global warming is the claimed increase in atmospheric levels from pre-industrial CO2 to the present. Ice cores provide the historic record and data collected at Mauna Loa the recent record. Both records are drastically modified to produce a smooth apparently continuous curve. This was apparently necessary to confirm the evidence from many 19th century measures that pre-industrial levels were approximately 270 ppm. These records were adjusted and selected, but a rigorous study of the data confirms that CO2 levels are generally higher and vary considerably both daily and annually.

Download PDF

This browser does not support PDFs. Please download the PDF to view it..

Leave a Reply