Atmospheric Carbon Dioxide.380 T 390 Measured at Mauna Loa, Hawaii 370 S 360 +35
ID: 117597 • Letter: A
Question
Atmospheric Carbon Dioxide.380 T 390 Measured at Mauna Loa, Hawaii 370 S 360 +350 Annual Cycle340 330 320 8 310 Jan Apr Jul Oct Jan 1960 1970 1980 1990 2000 The graph above shows the concentrations of carbon dioxide (in parts per million by volume, ppmv) measured in the atmosphere at Mauna Loa, Hawaii. These concentrations are representative of the lower atmosphere in most of the world. 20.Approximately what was the average concentration of CO2 in 1960? a. 315 ppmv b. 340 ppmv c. 300ppmv d. 500 ppmv 21.Approximately what was the average concentration of CO2 in 2007? a. 365 ppmv b. 340 ppmv c. 380 ppmv d. 370 ppmv 22.By about what percent did CO2 concentrations increase between 1960 and 2007? a. 30% b. 10% C. 25% d. 20%Explanation / Answer
(20) The average concentration of CO2 in 1960 was 315 ppmv.
(21) The average concentration of CO2 in 2017 was 380 ppmv.
(22) The Percentage of CO2 concentration increase between 1960 and 2007 was 20%
Percentage of CO2 concentration = {(380-315)/315}*100 = 20.63% or approximately 20%
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