Comparative analyses of the ultraviolet-B flux over the continental United State based on the NASA total ozone mapping spectrometer data and USDA ground-based measurements
Comparative analyses of the ultraviolet-B flux over the continental United State based on the NASA total ozone mapping spectrometer data and USDA ground-based measurements
复制标题
基于 NASA 总臭氧测绘光谱仪数据和 USDA 地面测量数据对美国大陆上空的 UV-B 通量进行比较分析
DOI：
10.1117/1.3507249
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发表时间：
2010-10-11
影响因子：
1.7
通讯作者：
Chang, Ni-Bin
中科院分区：
文献类型：
--
作者：
Gao, Zhiqiang;Gao, Wei;Chang, Ni-Bin
近年来，由于平流层臭氧消耗而增加的紫外线-B（UVB）暴露所引起的健康影响的风险已受到广泛关注。在美国，有两种方法可以准确测量UVB。它们包括：1）美国国家航空航天局（美国航天局）的Nimbus-7臭氧总量测绘分光计，以及2）美国农业部的地面网络。本文比较了这两种传感器的紫外线指数（UVI）的数据，在国家和区域，以支持可能的公共卫生，农业和生态分析在未来。本研究的主要发现是：1）虽然这两个资料集之间有差异，但时间相关系数可以高达98%。2)这两种类型的数据源描绘的宏观空间格局的UVI横跨美国大陆，表明一个强大的空间相关性; 3）这两个数据源是一般一致的，虽然UVI的美国宇航局TOMS数据往往是约0.13 - 1.05单位大于美国农业部的地面测量;和4）不同的差异，可以看到之间的中西部和两个沿海地区。虽然西海岸的紫外线指数水平在过去几年中呈下降趋势，但东海岸的紫外线指数水平在2000年至2005年期间呈相反趋势。很难断定这些变化是由于本研究期间臭氧总浓度的变化。美国农业部地面测量可以更好地应用于公共卫生，生态和农业应用的时间序列分析，因为它们能够提供密集的校准点测量。
In recent years, the risk of health effects caused by the increased exposure to Ultraviolet-B (UVB) due to stratospheric ozone depletion has received wide attention. In the US, there are two ways to accurately measure the UVB. They include: 1) the National Aeronautical and Space Administration (NASA) Nimbus-7 total ozone mapping spectrometer (TOMS), and 2) the United State Department of Agriculture (USDA) ground-based network. This paper compares these two sensors' data for the ultraviolet index (UVI) nationally and regionally to support possible public health, agricultural, and ecological analyses in the future. The major findings of our study are: 1) although there are discrepancies between these two data sets, the temporal correlation coefficients can be as high as 98%. 2) Both types of data sources depict the macroscopic spatial pattern of the UVI across the continental US.indicating a strong spatial correlation; 3) The two data sources are generally consistent though the UVI of the NASA TOMS data are often about 0.13-1.05 units larger than those of the USDA ground-based measurements; and 4) Varying differences can be seen between the Midwest and two coastal regions. While the level of the UVI on the west coast has shown a decreasing trend in the past few years, its counterpart on the east coast showed an opposite trend in between 2000 and 2005. It is hard to conclude that the changes are due to variations of total ozone concentrations in this study period. The USDA ground-based measurements may be better applied for time series analysis for public health, ecological, and agricultural applications due to their ability to provide intensive calibrated point measurements.