气候变化领域集成服务门户(CCPortal): Global distribution and 14-year changes in erythemal irradiance; UV atmospheric transmission; and total column ozone for2005-2018 estimated from OMI and EPIC observations

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DOI	10.5194/acp-20-8351-2020
	Global distribution and 14-year changes in erythemal irradiance; UV atmospheric transmission; and total column ozone for2005-2018 estimated from OMI and EPIC observations
	Herman J.; Cede A.; Huang L.; Ziemke J.; Torres O.; Krotkov N.; Kowalewski M.; Blank K.
发表日期	2020
ISSN	16807316
起始页码	8351
结束页码	8380
卷号	20 期号:14
英文摘要	Satellite data from the Ozone Measuring Instrument (OMI) and Earth Polychromatic Imaging Camera (EPIC) are used to study long-term changes and global distribution of UV erythemal irradiance E (mW m-2) and the dimensionless UV index E / (25 m Wm-2) over major cities as a function of latitude Φ, longitude f, altitude z, and time t. Extremely high amounts of erythemal irradiance (12 < UV index <18) are found for many low-latitude and high-altitude sites (e.g., San Pedro, Chile, 2.45 km; La Paz, Bolivia, 3.78 km). Lower UV indices at some equatorial or high-altitude sites (e.g., Quito, Ecuador) occur because of persistent cloud effects. High UVI levels (UVI > 6) are also found at most mid-latitude sites during the summer months for clear-sky days. OMI time-series data starting in January 2005 to December 2018 are used to estimate 14-year changes in erythemal irradiance ΦE, total column ozone ΦTCO3, cloud and haze transmission ΦCT derived from scene reflectivity LER, and reduced transmission from absorbing aerosols ΦCA derived from absorbing aerosol optical depth tA for 191 specific cities in the Northern Hemisphere and Southern Hemisphere from 60° S to 60° N using publicly available OMI data. A list of the sites showing changes at the 1 standard deviation level 1s is provided. For many specific sites there has been little or no change in E for the period 2005 2018. When the sites are averaged over 15° of latitude, there are strong correlation effects of both short- and long-term cloud and absorbing aerosol change as well as anticorrelation with total column ozone change ΦTCO3. Estimates of changes in atmospheric transmission ΔCT (Φ, f, z, t) derived from OMI-measured cloud and haze reflectivity LER and averaged over 15° of latitude show an increase of 1.1±1.2 % per decade between 60 and 45° S, almost no average 14-year change of 0.03±0.5 % per decade from 55° S to 30° N, local increases and decreases from 20 to 30° N, and an increase of 1±0.9 % per decade from 35 to 60° N. The largest changes in E are driven by changes in cloud transmission CT. Synoptic EPIC radiance data from the sunlit Earth are used to derive ozone and reflectivity needed for global images of the distribution of E from sunrise to sunset centered on the Americas, Europe Africa, and Asia. EPIC data are used to show the latitudinal distribution of E from the Equator to 75° for specific longitudes. EPIC UV erythemal images show the dominating effect of solar zenith angle (SZA), the strong increase in E with altitude, and the decreases caused by cloud cover. The nearly cloud-free images of E over Australia during the summer (December) show regions of extremely high UVI (14 16) covering large parts of the continent. Zonal averages show a maximum of UVI = 14 in the equatorial region seasonally following latitudes where SZA = 0°. Dangerously high amounts of erythemal irradiance (12 < UV index < 18) are found for many low-latitude and high-altitude sites. High levels of UVI are known to lead to health problems (skin cancer and eye cataracts) with extended unprotected exposure, as shown in the extensive health statistics maintained by the Australian Institute of Health and Welfare and the United States National Institute of Health National Cancer Institute. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; cloud cover; haze; irradiance; satellite data; spatial distribution; summer; synoptic meteorology; time series; total ozone; ultraviolet radiation; Bolivia; Chile; Ecuador; La Paz [Bolivia]; Metropolitana; Pichincha; Quito; San Pedro [Metropolitana]
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143935
作者单位	University of Maryland Baltimore County JCET, Baltimore, MD, United States; SciGlob Instruments and Services, Ellicott City, MD, United States; Science Systems and Applications, Lanham, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD 614, United States; Morgan State University, GESTAR, Baltimore, MD, United States
推荐引用方式 GB/T 7714	Herman J.,Cede A.,Huang L.,et al. Global distribution and 14-year changes in erythemal irradiance; UV atmospheric transmission; and total column ozone for2005-2018 estimated from OMI and EPIC observations[J],2020,20(14).
APA	Herman J..,Cede A..,Huang L..,Ziemke J..,Torres O..,...&Blank K..(2020).Global distribution and 14-year changes in erythemal irradiance; UV atmospheric transmission; and total column ozone for2005-2018 estimated from OMI and EPIC observations.Atmospheric Chemistry and Physics,20(14).
MLA	Herman J.,et al."Global distribution and 14-year changes in erythemal irradiance; UV atmospheric transmission; and total column ozone for2005-2018 estimated from OMI and EPIC observations".Atmospheric Chemistry and Physics 20.14(2020).