Source-receptor relationships of nitrate in Northeast Asia and influence of sea salt on the long-range transport of nitrate

作者：Kajino Mizuo^*; Sato Keiichi; Inomata Yayoi; Ueda Hiromasa

来源：Atmospheric Environment, 2013, 79: 67-78.

DOI：10.1016/j.atmosenv.2013.06.024

• Long-range transport
• Nitrate formation
• Dry deposition
• Wet deposition
• Sea-salt effects
• LTP project

We conducted a source receptor relationship (SRR) analysis of the total deposition of nitrate (TDN; dry + wet, gas + aerosol) in Northeast Asia using an aerosol chemical transport model. Six regions were included in the study: North China, Central China, South China, South Korea, Japan, and Ocean. More than 95% of the TON across China consisted of contributions from Chinese emissions. The largest intraregional contributions and the second largest contributions were attributed to the Central China region. The contribution of the three China regions accounted for approximately 50-60% of the TON in South Korea and Japan and 75% of the TON in the Ocean region, respectively. The spatial distributions of the SRR indicated that the sub-regional high was more than twice the regional averages of the TON. We also investigated the effects of sea salt on the transport and deposition of nitrate. During the long-range transport from the Asian continent over the ocean, nitric acid gas condenses on sea-salt particles to form NaNO3. The presence of sea-salt particles increased the TON over the downwind regions of the Asian continent by approximately 10-25% in South Korea and Japan and by up to 40% in the Ocean region. However, the sea-salt effects on the SRR of the TON were small (the absolute differences were smaller than approximately 10%).

• 出版日期2013-11
• 单位中国气象科学研究院