TY - JOUR AU - Ito, Norio AU - Mizohata, Akira PY - 2012/02/26 Y2 - 2024/03/28 TI - Long Term Observation of Atmospheric Aerosols at Sakai, Osaka, Japan JF - Journal of the Institute of Engineering JA - J. Inst. Engineering VL - 8 IS - 3 SE - Articles DO - 10.3126/jie.v8i3.5933 UR - https://www.nepjol.info/index.php/JIE/article/view/5933 SP - 72-74 AB - <p>We have continuously observed the aerosols with 3 kinds of samplers; automatic daily sampler (DS), Andersen sampler (AS) and Low pressure Andersen Sampler (LPAS) at Sakai, Osaka, Japan. We started these sampling from 1986 (DS), 1993 (AS) and 2000 (LPAS). Yearly mean of fine particles (&lt; 2.1&mu;m) has decreased by about 10 &mu;g/m3 from 1993 to 2009. By contrast the coarse particles (&gt; 2.1&mu;m) do not have explicit decrease. The main constituents in fine particles are carbon matters (EC and OC) and ions (sulphate and nitrate). Ions do not have decrease trend. These trends indicate that the decrease of fine particles might be caused by the decrease of carbon matters.</p> <p>DOI: <a href="http://dx.doi.org/10.3126/jie.v8i3.5933">http://dx.doi.org/10.3126/jie.v8i3.5933</a></p> <p><em>JIE </em>2011; 8(3): 72-74</p> ER -