Section EXERCISE 24 PROBLEMS PART II -8 and 24-9, charts showing the change in a

Question

Section EXERCISE 24 PROBLEMS PART II -8 and 24-9, charts showing the change in atmos- Figures 24 are hased on Fgatory in Hawai'i, from 1958 to April 2016. Amospheric Cartbon Dioxide at Mauna Loa Observatory pheric carbon dioxide measured at the Mauna 400F Scripps Institution of Ocsanography NOAA Earth System Rlesoarch Laboratory 380 360 340 320 1960 190 11900 2000 2010 2020 2030 Figure 24-9: Atmospheric carbon dioxide measured at Mauna sonally corrected vaie. (Adapted from NOAA) YEAR 2012 2013 204 205 2016 2017 YEAR measured at Mama Loa Observatory, Hawai', from January Loa Observatory, Hawai'i, from 1958 to April 2016 The 2012to April 2016. The dark line is the seasonally cor- line is the sea eted value. (Adapted from NOAA) 1. What is the approximate variation in CO, concentration each year? ppm Notice that the concentration of CO, in the atmosphere reaches its highest point at the same time each year. 2. (a) During which time of year does CO, reach its highest point? (b) What explains the timing of the annual fluctuation in CO,? (Hint: Think about the process of photosynthesis and plant respiration, and the locations of large forests on Earth.) If the current trend continug evels uill

Explanation / Answer

1.

If we'll see the figure 24-8, we will note the variation is

391 to 397: variation = 397-391 = 6

394 to 400: variation = 400-394 = 6

396 to 402: variation = 396-402 = 6

Hence we can say that the variation is 6 PPM (parts per million).

2.

(a) As per figure 24-8, the value of carbon dioxide is maximum during the month february.

(b) During the month of february, the amount of sunlight recieved by the plants is less as compared to other months of year and hence less amount of photosynthesis will happen and this lead to large amount of carbon dioxide in atmospher (since by the process of photosyntesis the plants in the presence of sunlight prepare food by taking up the carbondioxide that is presenty in atmospher and oxygen is the by product of this process. )

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