科研之友
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摘要
The transport of chemical compounds from surface emissions into the stratosphere is very important for stratospheric, and even global, climate change. However, the lack of observational data makes it difficult to trace these emissions back to specific regions. This study uses numerical simulations to investigate the transport of surface emissions from high population density regions into the stratosphere. In March, April and May, Southeast Asia and Australia tracers contribute similar to 1/3 and similar to 1/4 of total tracers entering the stratosphere, respectively. In June, July and August, Southwest Asia contributes similar to 1/2 of the total, which is far more than the contribution of all other source regions. In September, October and November, South America and Southeast Asia each accounts for similar to 1/4 of the total tracer budget. In December, January and February, Australia and Southeast Asia each accounts for similar to 1/4 of all tracers entering the stratosphere. A further quantitative estimation illustrates that the average proportion of a tracer entering the stratosphere compared with its total release is 2.6% for Southeast Asia, followed by 1.7% for Australia, 1.4% for Southwest Asia, 1.0% for Africa, 1.0% for South America, 0.9% for East Asia, 0.7% for North America, and 0.3% for Europe.
