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Observations of trace gases and aerosols over the Indian Ocean during the monsoon transition period

机译:季风过渡期印度洋上微量气体和气溶胶的观测

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Characteristics of trace gases (O_3, CO, CO_2, CH_4 and N_2O) and aerosols (particle size of 2.5 micron) were studied over the Arabian Sea, equatorial Indian Ocean and southwest part of the Bay of Bengal during the monsoon transition period (October-November, 2004). Flow of pollutants is expected from south and southeast Asia during the monsoonal transition period due to the patterns of wind flow which are different from the monsoon period. This is the first detailed report on aerosols and trace gases during the sampled period as the earlier Bay of Bengal Experiment (BOBMEX), Arabian Sea Monsoon Experiment (ARMEX) and Indian Ocean Experiments (INDOEX) were during monsoon seasons. The significant observations during the transition period include: (ⅰ) low ozone concentration of the order of 5 ppbv around the equator, (ⅱ) high concentrations of CO_2, CH_4 and N_3O and (ⅲ) variations in PM2.5 of 5-20 μg/m~3.
机译:在季风过渡期(十月至十月),研究了阿拉伯海,赤道印度洋和孟加拉湾西南部分的痕量气体(O_3,CO,CO_2,CH_4和N_2O)和气溶胶(粒径为2.5微米)的特征。 2004年11月)。季风过渡时期,由于风的流动方式与季风时期不同,因此预计污染物将从南亚和东南亚流入。这是采样期间气溶胶和痕量气体的第一份详细报告,因为较早的孟加拉湾实验(BOBMEX),阿拉伯海季风实验(ARMEX)和印度洋实验(INDOEX)处于季风季节。在过渡期间的重要观察结果包括:(ⅰ)赤道周围的臭氧浓度低至5 ppbv左右;(ⅱ)高浓度的CO_2,CH_4和N_3O;(ⅲ)PM2.5的变化为5-20μg / m〜3。

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