Kim Minho, Zhang Xingyou, Holt James B, Liu Yang
Epidemiology and Surveillance Branch, Division of Population Health, National Center for Chronic Disease and Public Health Promotion, Centers for Disease Control and Prevention, Atlanta, USA ; Department of Geography, Sangmyung University, Seoul, Republic of Korea.
Epidemiology and Surveillance Branch, Division of Population Health, National Center for Chronic Disease and Public Health Promotion, Centers for Disease Control and Prevention, Atlanta, USA.
Health (Irvine Calif). 2013 Oct;5(10A2):8-13. doi: 10.4236/health.2013.510A2002.
Recent studies have explored the relationship between aerosol optical depth (AOD) measurements by satellite sensors and concentrations of particulate matter with aerodynamic diameters less than 2.5 μm (PM). However, relatively little is known about spatial and temporal patterns in this relationship across the contiguous United States. In this study, we investigated the relationship between US Environmental Protection Agency estimates of PM concentrations and Moderate Resolution Imaging Spectroradiometer (MODIS) AOD measurements provided by two NASA satellites (Terra and Aqua) across the contiguous United States during 2005. We found that the combined use of both satellite sensors provided more AOD coverage than the use of either satellite sensor alone, that the correlation between AOD measurements and PM concentrations varied substantially by geographic location, and that this correlation was stronger in the summer and fall than that in the winter and spring.
近期的研究探讨了卫星传感器测量的气溶胶光学厚度（AOD）与空气动力学直径小于2.5微米的颗粒物（PM）浓度之间的关系。然而，对于美国本土这一关系的时空模式，人们了解得相对较少。在本研究中，我们调查了美国环境保护局对PM浓度的估计值与美国国家航空航天局（NASA）两颗卫星（Terra和Aqua）提供的中分辨率成像光谱仪（MODIS）在2005年对美国本土AOD测量值之间的关系。我们发现，同时使用这两颗卫星传感器所提供的AOD覆盖范围比单独使用任何一颗卫星传感器更广，AOD测量值与PM浓度之间的相关性因地理位置而异，且这种相关性在夏季和秋季比在冬季和春季更强。
