Seasonal and Interannual Variability of Trace Gases in the Tropical and Extra-tropical Boundary Layer

来自东南亚和海洋大陆的自然和人为排放对大气成分、气候和空气质量产生重要影响。气候变化极有可能导致陆地和海洋生物圈的排放发生变化。此外，东南亚的空气污染物排放受到强劲的工业增长和发展的推动，这一趋势可能会持续到可预见的未来。了解这些过程及其影响是一个关键的化学/气候问题。我们的目标是提高对东南亚和海洋大陆短寿命卤代烃和碳氢化合物排放在空间（从本地到全球）和时间（从天到年）范围内对大气影响的定量认识。我们建议在2008 - 2011年在台湾、马来西亚、北澳大利亚和新西兰的五个地面站建立热带边界层大气中自然和人为卤化碳浓度的气候学。在研究巡航期间和马来亚大学同事使用的其他现有地点，将使用巡回仪器进行短期测量。我们将与海洋生物学家合作，调查在一系列气候条件下影响排放和浓度的因素。在第二阶段，我们将在热带地区测量一系列碳氢化合物。然后，这些测量将与数值模型一起使用，以检验和改进模拟的排放估计，并调查它们对对流层氧化能力、空气质量以及区域和全球气候的影响。

Natural and anthropogenic emissions from Southeast Asia and the maritime continent exert an important influence on atmospheric composition, climate and air quality. Changes in climate will most likely lead to changed emissions from the terrestrial and marine biospheres. In addition, emissions of air pollutants from Southeast Asia are driven by strong industrial growth and development, a trend likely to continue into the foreseeable future. Understanding these processes and their impacts is a crucial chemistry/climate question. Our aim is to improve quantitative understanding of the atmospheric impacts, on a range of spatial (from local to global) and temporal (from days to years) scales, of emissions of short-lived halocarbons and hydrocarbons in SE Asia and the maritime continent. We propose to establish a climatology of atmospheric concentrations of natural and anthropogenic halocarbons in the tropical boundary layer at five ground stations in Taiwan, Malaysia, Northern Australia and New Zealand from 2008 to 2011. Shorter-term measurements with a roving instrument will be made during research cruises and at other existing sites used by our colleagues at the University of Malaya. In collaboration with marine biologists we will investigate the factors influencing emissions and concentrations under a range of climate conditions. In a second phase, we will measure a range of hydrocarbons at the tropical sites. These measurements will then be used with numerical models to test and improve modelled emission estimates and to investigate their impact on tropospheric oxidative capacity, air quality and regional and global climate.