HOW GREENHOUSE GASES RELATE TO CLIMATE CHANGE
The Relationship between Greenhouse Gases and Global Temperatures
Plants absorb carbon dioxide through their stomata, pores on the leaves. At the same time, plants shed water through their stomata. Plants transpire as water vapor more than 90 percent of the water that they absorb through their roots. Through transpiration, plants change the climate, though not in a straightforward way. On the one hand, water vapor is a greenhouse gas, absorbing as heat the sunlight reflected from Earth.
The greenhouse effect,Figure 2.7.
When a greenhouse gas is very abundant the absorption lines for which it is active are said to �become saturated,� that is, most of the available IR will have been absorbed by the molecules of that gas.
Explain the relationship between photosynthesis and ..
The fact that plants absorb carbon dioxide during photosynthesis has an important consequence for the climate. Carbon dioxide correlates with temperature. A high concentration of carbon dioxide correlates with high temperatures, whereas a low concentration of the gas correlates with low temperatures. This relationship holds true, because carbon dioxide is a greenhouse gas: it traps sunlight that reflects from Earth, preventing light, in the form of infrared radiation, from returning to space. In trapping sunlight, carbon dioxide traps heat, thereby increasing the temperature of the atmosphere. Plants lower the concentration of carbon dioxide by absorbing it during photosynthesis. When plants absorb carbon dioxide faster than Earth produces it through vol-canism, the concentration of carbon dioxide diminishes, and temperatures decline. In this context, plants may have contributed to the onset of the Ice Ages by absorbing carbon dioxide.
sun to help warm the planet up= greenhouse effect.
The light-independant reactions of photosynthesis occur in the stroma of the chloroplast and involve the conversion of carbon dioxide and other compounds into glucose. The light-independent reactions can be split into three stages, these are carbon fixation, the reduction reactions and finally the regeneration of ribulose bisphosphate. Collectively these stages are known as the Calvin Cycle.