5) Describe what processes cause the concentration of atmospheric CH4 to increas

Question

5) Describe what processes cause the concentration of atmospheric CH4 to increase 6) W hat is different about the atmospheric CH4 concentrations during our present interglacial period than in past interglacial periods? 7) What is different about the atmospheric CO2 concentrations during our present interglacial period than in past interglacial periods? (hint: look at figure on page 50) 8) How have other investigators explained these differences in greenhouse gases in our interglacial versus previous interglacial periods?

Explanation / Answer

5)The stomachs of cattle, fermentation in rice fields, fracking for natural gas, coal mines, festering bogs, burning forests - all produce methane, due to the activities of microbes in wetlands, rice paddies, and the guts of ruminants  the burning of vegetation like forests, bush, and crop residues , it increases rapidly.

6) Methane concentration was much lower during past interglacial period than in present glacial period it varied with climate during the Quaternary, rising from a concentration of 375?p.p.b.v  to 680?p.p.b.v.

7) the concentration of atmospheric carbondioxide is lower in past interglacial period than in present interglacial period. the whole-ocean reservoir of algal nutrients was larger during past interglacial which strengthens the biological pump at low altitudes.

8) with the help of ice core analysis,climatic changes in the high latitudes of the Southern Hemisphere, with low greenhouse gas concentrations found under full glacial conditions investigators explained theses differences.

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