Compared to the Geologic Record Extending Back Hundreds of Thousands

question 67

Multiple Choice

Compared to the geologic record extending back hundreds of thousands of years,which of the following statements is correct regarding the record of atmospheric carbon dioxide over the past 50 years?

• A) Atmospheric carbon dioxide concentrations are lower now than at any time in the past several hundred thousand years.
• B) Atmospheric carbon dioxide concentrations have remained constant for the past 50 years, which is different from the rapid fluctuations in the past.
• C) The rate of change of atmospheric carbon dioxide concentration is much slower now than it was in previous warm periods.
• D) The rate of change of atmospheric carbon dioxide concentration is much faster now than it was in previous warm periods.
• E) The trend in atmospheric carbon dioxide concentration today is what you would expect from Milankovitch forcing of climate.

---

Definitions:

Conservatism

In accounting, it is the principle of recognizing expenses and liabilities as soon as possible when there is uncertainty about the outcome, but only recognizing revenues when they are assured of being received.

Put-call Ratio

A metric used to measure market sentiment by dividing the number of traded put options by the number of traded call options.

Breadth

The extent to which movements in the broad market index are reflected widely in movements of individual stock prices.

Confidence Index

Ratio of the yield on top-rated corporate bonds to the yield on intermediate-grade bonds.