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Atmospheric Carbon Dioxide From 1996-2000
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MonthAtmospheric Carbon Dioxide Cocentration (ppm)
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20192020202120222023
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JAN410.85413.32415.15418.01419.13JANJANJANJAN
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FEB411.58414.04416.47418.99420.33FEBFEBFEBFEB
6
MAR411.90414.44417.10418.45420.51MARMARMARMAR
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APR413.46416.11418.26420.01422.73APRAPRAPRAPR
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MAY414.75417.16418.95420.78423.78MAYMAYMAYMAY
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JUN413.89416.29418.70420.68423.39JUNJUNJUNJUN
10
JUL411.79414.43416.66418.71421.62JULJULJULJUL
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AUG410.02412.52414.38416.75419.56AUGAUGAUGAUG
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SEP408.48411.17412.93415.42418.06SEPSEPSEPSEP
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OCT408.40411.12413.52415.31418.41OCTOCTOCTOCT
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NOV410.16412.89414.81417.03420.11NOVNOVNOVNOV
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DEC411.81413.88416.43418.46421.65DECDECDECDEC
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Annual Average411.42413.95416.11418.22420.77
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18
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Atmospheric Carbon Dioxide From 1959-1963
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MonthAtmospheric Carbon Dioxide Cocentration (ppm)198319-Jan1206.83
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1959196019611962196319-Feb1210.25
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JAN315.58316.43316.89317.94318.7419-Mar1211.59
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FEB316.47316.97317.70318.56319.6919-Apr1211.26
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MAR317.65317.58318.54319.69319.8619-May1212.33
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APR316.72319.03319.48320.58321.3919-Jun1220.27
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MAY318.29320.03320.58321.01322.2419-Jul1225.44
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JUN318.16319.59319.77320.61321.4719-Aug1222.17
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JUL316.55318.18318.58319.61319.7419-Sep1218.21
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AUG314.80315.91316.79317.40317.7719-Oct1215.32
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SEP313.84314.16314.99316.26316.2119-Nov1213.38
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OCT313.34313.84315.31315.42315.9919-Dec1212.33
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NOV314.82315.00316.10316.69317.06199920-Jan1212.89
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DEC315.59316.19317.01317.69318.3620-Feb1213.30
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Annual Average315.98316.91317.65318.46319.0420-Mar1211.75
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http://cdiac.esd.ornl.gov/ftp/maunaloa-co2/maunaloa.co2
20-Apr1208.80
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20-May1207.37
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1
During which month or months does the minimum value for atmospheric CO2 concentration occur for the years 1996-2000?
20-Jun1206.40
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September20-Jul1207.28
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20-Aug1208.74
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2
During which month or months does the maximum value for atmospheric CO2 concentration occur for the years 1996-2000?
20-Sep1211.29
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April for 1999, May for the other years.
20-Oct1212.11
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20-Nov1212.58
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3
Based on your knowledge of the relationship between photosynthesis and CO2, explain why CO2 concentrations cycle
20-Dec1213.94
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throughout the year.
202321-Jan1046.97
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Green plants ; abundant in the summer, remove CO2 during photosunthesis. Since green plants are dormant during the winter,
21-Feb1047.02
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the plants cannot remove CO2 from the atmosphere.
21-Mar1046.03
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21-Apr1049.69
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4
Based on your knowledge of the relationship between the burning of fossil fuels and CO2, give another reason for the cyclic
21-May1054.28
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nature of CO2 concentrations throughout the year.
21-Jun1056.39
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The burninig of fossil fuels produces CO2. Because more fossil fuels are burned during the winter months to heat homes,
21-Jul1061.02
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CO2 concentrations increase in winter and decrease in the summer.
21-Aug1065.35
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21-Sep1065.82
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5
In ppm, by how much did the annual average increase between 1959 and 1963?
21-Oct1065.34
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What was the largest increase between two years during the period 1959-1963?
21-Nov1064.81
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3.01 ppm; 0.93 ppm from 1959-1960
21-Dec1068.18
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202422-Jan1072.67
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6
In parts per million, by how much did the annual average increase between 1996 and 2000?
22-Feb1076.52
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What was the largest increase between two years during the period from 1996-2000?
22-Mar1075.35
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6.76 ppm; 2.87 ppm from 1997 to 1998.
22-Apr1072.24
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22-May1067.08
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7
Based on your answers to questions 5 and 6, how is the trend in CO2 concentrations changing over time?
22-Jun1062.50
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The amount of the yearly increase in CO2 concentrations is growing larger over time.
22-Jul1061.49
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22-Aug1063.16
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8
Name two ways that the increase in atmospheric CO2 concentrations could be slowed down.
22-Sep1063.71
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Planting trees to replace those lost to deforestation, decreasing the reliance on fossil fuels through
22-Oct1061.22
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conservation, and using alternate forms of energy instead of burining fossil fuels.
22-Nov1060.89
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22-Dec1063.29
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9
Using page 476 of your text; How does the trend in surface temperature from 1960-2000 compare with
202523-Jan1066.37
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the trend in CO2 concentration? Does this prove that increasing CO2 concentrations are the cause of rising temperatures?
23-Feb1068.18
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The GST increased steadily from 1996-2000, similar to the CO2 concentrations.
23-Mar1066.43
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The fact that both trends increase does not prove a cause-effect relationaship, but our limited
23-Apr1062.23
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understanding of climate indicates that the two trends are probably related in some way.
23-May1057.02
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23-Jun1054.98
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23-Jul1054.14
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23-Aug1055.54
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23-Sep1057.25
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23-Oct1057.57
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23-Nov1058.91
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23-Dec1062.24
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