Figure from Hansen et al,”Target Atmospheric CO2” Open Atmospheric Science Journ

Question

Figure from Hansen et al,”Target Atmospheric CO2” Open Atmospheric Science Journal 2 (2008):217-31 Use the Hansen graph to answer the following questions. In this graph, year “0” is the Start of the Industrial Revolution (the late 1700’s). Use the straight line function to aid you in determining the correct answer (Choose” insert” at the top of this MS Word page, then “shapes” and click on the straight line function) 30. Approximately 18,000 years ago, the sea level was the lowest recorded over the last 425,000 years. This lowest sea level coincided with what major event in the recent history of our planet? (1 point)

Explanation / Answer

Since the lowest level of sea 1800p years ago there has been steep rise in sea level, temperature and GHG gases which is indicative of The major event famously known as GLOBAL WARMING.

This event has brought many coastal cities like New York, Hong Kong, Mumbai under the risk of drowning. Hansen suggest's that unless and until the CO2 concentration is no lowered from 385 ppm to 350 ppm things will be out of man's control.

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