Warming of the Arctic lower stratosphere by light absorbing particles
Warming of the Arctic lower stratosphere by light absorbing particles
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DOI：
10.1029/2003gl018883
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发表时间：
2004-03-24
影响因子：
5.2
通讯作者：
Raga, G
中科院分区：
文献类型：
--
作者：
Baumgardner, D;Kok, G;Raga, G
近期对北极平流层下层吸光颗粒的测量显示，黑碳的质量浓度比1992年测量的要高得多。这种差异主要是由于采用了一种比以前更定量、更准确的技术进行测量。我们将大量吸光物质归因于来自低纬度对流层源的输送，而非飞机排放的增加。与仅有气体的大气相比，该气溶胶层计算得出的加热速率在冬季增加了12%。这是颗粒吸收光的结果，可能会扰乱当地对流层顶的高度，并影响对流层/平流层的交换过程。
Recent measurements of light absorbing particles in the Arctic lower stratosphere show significantly higher mass concentrations of black carbon than were measured in 1992. The difference is primarily a result of measurements with a more quantitative and accurate technique than was previously used. We attribute the large amount of light absorbing material to transport from lower latitude, tropospheric sources rather than increases in aircraft emissions. The calculated heating rate in this aerosol layer, as compared to an atmosphere consisting of only gases, increases by 12% during the winter. This is a result of light absorption by the particles and could perturb the altitude of the local tropopause and affect tropospheric/stratospheric exchange processes.