Climatic Effects Due to Halogenated Compounds in the Earth's Atmosphere
نویسندگان
چکیده
Using a one-dimensional radiative-convective model, we perform a sensitivity study of the effect of ozone depletion in the stratosphere on the surface temperature. There could be a cooling of the surface temperature by -0.2 K due to chlorofluoromethane-induced ozone depletion at steady state (assuming 1973 release rates). This cooling reduces significantly the greenhouse effect due to the presence of chlorofluoromethanes. Carbon tetrafluoride has a strong "" band at 7.8 ~o~-m, and the atmospheric greenhouse effect is shown to be 0.07 and 0.12 K (ppbv)-1 with and without taking into account overlap with CH4 and N20 bands. At concentration higher than 1 ppbv, absorption by the v3 band starts to saturate and the greenhouse effect becomes less efficient.
منابع مشابه
تحلیل آماری و سینوپتیکی کولاک برف در استان آذربایجان غربی
Climate is one of the important natural factors that affect all stages of life, particularly human exploitation. Selection of the type of clothing, housing, cultures, architecture, civil engineering, and settlements are influenced by climatic factors. It can be said that the climatic circumstances of the surface of the earth and atmospheric circulation patterns have an important role in shaping...
متن کاملInitial studies of the effects of halogenated dispersions on the amount of NICS of rings for C8H12XNO2
In this research at the first complex and its halogenated derivatives were optimized. NBO calculations and NMR for the complexes were carried out at the B3LYP/6-31G*quantum chemistry level. In the 1- (4-fluorophenyl) -2, 3-dihydro-1 H-naphto- [1, 2-e] [1, 3] oxazine-3-n, there are 4 rings, respectively, rings from the side attached to the halogen They are named C, B, A, and D. Calculations and ...
متن کاملInvestigating the Effect of Changes of Halogenated Compounds on the Aromaticity Flow (NICS) of Rings 5-fluorophenyl-1, 3, 7, 9-tetra methylpyrido [2,3] [d-5,6 dipyrimidine -2, 4, 6 and 8 tetron
In the combination of 5-fluorophenyl-1, 3, 7, 9-tetra methyl pyrido [2, 3, d, d, 5, 6 di pyrimidine -2, 4, 6, and 8 tetron, there are 4 rings, respectively, ring that is attached to the halogen ring A and, respectively, a ring The lower and the right to the left of the ring A are called C, B, and D. Calculations and studies show that the amount of aromatics in halogen-ring A in all cases has th...
متن کاملInvestigating the Effect of Changes of Halogenated Compounds on the Aromaticity Flow (NICS) of Composite Rings 5-fluorophenyl-1, 3, 7, 9-tetra methylpyrido [2,3-: d [d-5,6 dipyrimidine -2, 4, 6 and 8 tetron
In the combination of 5-fluorophenyl-1, 3, 7, 9-tetra methylpyrido [2, 3, d, d, 5, 6 dipyrimidine -2, 4, 6, and 8 tetron, there are 4 rings, respectively, ring that is attached to the halogen ring A and, respectively, a ring The lower and the right to the left of the ring A are called C, B, and D. Calculations and studies show that the amount of aromatics in halogen-ring A in all cases has the ...
متن کاملImplications of Solar Evolution for the Earth's Early Atmosphere.
The roughly 25 percent increase in luminosity over the life of the sun shared by many different solar models is shown to be a very general result, independent of the uncertainties suggested by the solar neutrino experiment. Superficially, this leads to a conflict with the climatic history of the earth, and if basic concepts of stellar evolution are not fundamentally in error, compensating effec...
متن کامل