What does the “0” line represent on the chart? What is indicated by a sharp spike below the “0” line?

American Literature by Geoffrey
  1. What does the “0” line represent on the chart? What is indicated by a sharp spike below the “0” line?
  2. Look at the years 1580 to 1640. During which period did Jamestown suffer its longest unbroken period of drought?
  3. In the winter of 1609-1610, Jamestown experienced what settlers called the “starving time.” Based on this document, what inference can you make about the cause of this “starving time”?
  4. Is there any way lack of rain might strain English relations with the Powhatans? Explain.