Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-8081-2017 |
Impact of aerosols and clouds on decadal trends in all-sky solar radiation over the Netherlands (1966-2015) | |
Boers, Reinout; Brandsma, Theo; Siebesma, A. Pier | |
2017-07-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands |
英文摘要 | A 50-year hourly data set of global shortwave radiation, cloudiness and visibility over the Netherlands was used to quantify the contribution of aerosols and clouds to the trend in yearly-averaged all-sky radiation (1.81 +/- 1.07Wm(-2) decade(-1)). Yearly-averaged clearsky and cloud-base radiation data show large year-to-year fluctuations caused by yearly changes in the occurrence of clear and cloudy periods and cannot be used for trend analysis. Therefore, proxy clear-sky and cloud-base radiations were computed. In a proxy analysis hourly radiation data falling within a fractional cloudiness value are fitted by monotonic increasing functions of solar zenith angle and summed over all zenith angles occurring in a single year to produce an average. Stable trends can then be computed from the proxy radiation data. A functional expression is derived whereby the trend in proxy all-sky radiation is a linear combination of trends in fractional cloudiness, proxy clearsky radiation and proxy cloud-base radiation. Trends (per decade) in fractional cloudiness, proxy clear-sky and proxy cloud-base radiation were, respectively, 0.0097 +/- 0.0062, 2.78 +/- 0.50 and 3.43 +/- 1.17Wm(-2). To add up to the allsky radiation the three trends have weight factors, namely the difference between the mean cloud-base and clear-sky radiation, the clear-sky fraction and the fractional cloudiness, respectively. Our analysis clearly demonstrates that all three components contribute significantly to the observed trend in all-sky radiation. Radiative transfer calculations using the aerosol optical thickness derived from visibility observations indicate that aerosol-radiation interaction (ARI) is a strong candidate to explain the upward trend in the clear-sky radiation. Aerosol-cloud interaction (ACI) may have some impact on cloud-base radiation, but it is suggested that decadal changes in cloud thickness and synoptic-scale changes in cloud amount also play an important role. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404773700004 |
WOS关键词 | UNITED-STATES ; SHORTWAVE RADIATION ; SURFACE ; VISIBILITY ; GERMANY ; EUROPE ; POLLUTION ; ALBEDO |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/30564 |
专题 | 地球科学 |
作者单位 | KNMI, POB 201, De Bilt, Netherlands |
推荐引用方式 GB/T 7714 | Boers, Reinout,Brandsma, Theo,Siebesma, A. Pier. Impact of aerosols and clouds on decadal trends in all-sky solar radiation over the Netherlands (1966-2015)[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(13). |
APA | Boers, Reinout,Brandsma, Theo,&Siebesma, A. Pier.(2017).Impact of aerosols and clouds on decadal trends in all-sky solar radiation over the Netherlands (1966-2015).ATMOSPHERIC CHEMISTRY AND PHYSICS,17(13). |
MLA | Boers, Reinout,et al."Impact of aerosols and clouds on decadal trends in all-sky solar radiation over the Netherlands (1966-2015)".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.13(2017). |
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