Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025585 |
Downward solar global irradiance at the surface in Sao Paulo city-The climatological effects of aerosol and clouds | |
Yamasoe, M. A.1; do Rosario, N. M. E.2; Barros, K. M.1 | |
2017 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil |
英文摘要 | We analyzed the variability of downward solar irradiance reaching the surface at Sao Paulo city, Brazil, and estimated the climatological aerosol and cloud radiative effects. Eleven years of irradiance were analyzed, from 2005 to 2015. To distinguish the aerosol from the cloud effect, the radiative transfer code LibRadtran was used to calculate downward solar irradiance. Two runs were performed, one considering only ozone and water vapor daily variability, with AOD set to zero and the second allowing the three variables to change, according to mean climatological values. The difference of the 24 h mean irradiance calculated with and without aerosol resulted in the shortwave aerosol direct radiative effect, while the difference between the measured and calculated, including the aerosol, represented the cloud effect. Results showed that, climatologically, clouds can be 4 times more effective than aerosols. The cloud shortwave radiative effect presented a maximum reduction of about - 170 W m(-2) in January and a minimum in July, of - 37 W m(-2). The aerosol direct radiative effect was maximum in spring, when the transport of smoke from the Amazon and central parts of South America is frequent toward Sao Paulo. Around mid-September, the 24 h radiative effect due to aerosol only was estimated to be - 50 W m(-2). Throughout the rest of the year, the mean aerosol effect was around -20 W m(-2) and was attributed to local urban sources. The effect of the cloud fraction on the cloud modification factor, defined as the ratio of all-sky irradiation to cloudless sky irradiation, showed dependence on the cloud height. Low clouds presented the highest impact while the presence of high clouds only almost did not affect solar transmittance, even in overcast conditions. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393877800022 |
WOS关键词 | ATMOSPHERIC AEROSOLS ; RADIATION ; BRAZIL ; IDENTIFICATION ; VARIABILITY ; EMISSIONS ; AERONET ; IMPACT ; CYCLE ; FLUX |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33746 |
专题 | 气候变化 |
作者单位 | 1.Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo, Brazil; 2.Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Diadema, Brazil |
推荐引用方式 GB/T 7714 | Yamasoe, M. A.,do Rosario, N. M. E.,Barros, K. M.. Downward solar global irradiance at the surface in Sao Paulo city-The climatological effects of aerosol and clouds[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(1). |
APA | Yamasoe, M. A.,do Rosario, N. M. E.,&Barros, K. M..(2017).Downward solar global irradiance at the surface in Sao Paulo city-The climatological effects of aerosol and clouds.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(1). |
MLA | Yamasoe, M. A.,et al."Downward solar global irradiance at the surface in Sao Paulo city-The climatological effects of aerosol and clouds".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.1(2017). |
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