Graph I am analyzing: enter image description here

What I am trying to figure out from the graph is:

  • What is the range for CO2 over the record (approximation)
  • What are the major forcings for the overall trend in this record
  • What is the range for CO2 over a typical annual cycle (approximation)
  • What are at least wo key properties of the physical geography of the Earth that contribute to these cycles?
  • 1
    $\begingroup$ Especially given the last question point, this appears to be a homework request. We ask that you show your initiative towards answering these questions, tell us what YOU'RE thinking, and then perhaps we may be able to give input. It benefits neither us nor you for us to just give answers. Give it a try :) $\endgroup$ Apr 13 '18 at 12:34
  • $\begingroup$ @JeopardyTempest I was thinking that the for the last one, for physical geography I was thinking how the seasons are different in different parts of the world and how that has some effect. Also, the oceans. But not sure how to expand that out. $\endgroup$
    – yre
    Apr 13 '18 at 13:15
  • $\begingroup$ @JeopardyTempest Also for range for C02 over the record I am thinking (280, 380) or a 100 unit range. $\endgroup$
    – yre
    Apr 13 '18 at 13:17
  • $\begingroup$ @JeopardyTempest As for the second question, as I understand the word forcings, it has to do with the amount of energy we receive from the sun, and the amount of energy we radiate back into space. Therefore some forcings that could influence this trend are deforestation therefore changing the albedo of earth (sun reflectivity). Another is human induced changes with greenhouse gases. And lastly since this is Hawaii one may consider atmospheric aerosols (volcanic sulfates) $\endgroup$
    – yre
    Apr 13 '18 at 13:26
  • 1
    $\begingroup$ @yre: For the last point about physical geography, think about changing seasons and land distribution in northern & southern hemispheres. $\endgroup$
    – jamesqf
    Apr 13 '18 at 18:19

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