How Similar Are The Aerosols Of Beijing And Delhi?
More than you might think. Both have the strong daily variations of megacities. Both contain multiday cycles with raised baselines that mean transport from surrounding regions. Both are affected by mountain/valley (upslope/downslope) breezes created by sloping ground near mountain ranges. Both can show solenoidal flow and oscillating flow during stagnant conditions that can return air and pollutants the next day. Regional aerosol seems to be less important to Delhi than to Beijing. Delhi’s mountain/valley circulation is stronger than Beijing’s. Delhi may have a mild valley effect created by the surrounding Aravali Mountains and the Delhi Ridge to the west (receding foothills), whereas Beijing has no valleys nearby. Delhi’s mountain/valley breezes often run perpendicular to the mountains, whereas Beijing’s usually run nearly parallel to the mountains. Regional contributions to Delhi’s aerosol can come from the NW or SE, whereas regional contributions to Beijing’s aerosol come from the south.
Beijing Delhi aerosol transport
Kenneth A. Rahn Manju Mohan
School of Environmental Science and Engineering,Tsinghua University,Beijing 100084,China Centre for Atmospheric Sciences,Indian Institute of Technology Delhi,Hauz Khas,New Delhi 110016,Indi
国际会议
西安
英文
334-341
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）