The magnitude of the effect of air pollution on sunshine hours in China

Wang, Yawen; Yang, Yonghui; Zhao, Na; Liu, Chen; Wang, Qinxue

doi:10.1029/2011jd016753

Cited by 50 publications

(61 citation statements)

References 40 publications

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“…Of these, 638 have sunshine duration records that cover at least 85 % of the whole measurement period since the 1950s. Moreover, it has been demonstrated that sunshine duration is able to capture variations in cloudiness and, to a lesser extent, the signal from aerosol concentrations (Sanchez-Lorenzo et al, 2009;Wang et al, 2012c;Sanchez-Romero et al, 2014Li et al, 2016;Wild, 2016). Similar to the surface solar radiation trends, a transition from decreasing to leveling off was also noted in the sunshine duration trends in China around 1990 (Wang et al, 2013.…”

Section: Introductionmentioning

confidence: 56%

Urbanization effect on trends in sunshine duration in China

et al. 2017

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Abstract. There is an ongoing debate on whether the observed decadal variations in surface solar radiation, known as "dimming" and "brightening" periods, are a large-scale or solely local phenomenon. We investigated this issue using long-term sunshine duration records from China, which experienced a rapid increase in urbanization during the past decades. Over the period 1960-2013, 172 pairs of urban and nearby rural stations were analyzed. Urban and rural sunshine duration trends show similar spatial patterns during a dimming phase and a subsequent period during which trends were leveling off . This indicates that rather than local effects, the trends in sunshine duration are on more of a national or regional scale in China. Nevertheless, in the dimming phase, the declining rate of sunshine duration in rural areas is around two-thirds of that in urban areas. The ratio of rural to urban dimming generally increases from a minimum of 0.39 to a maximum of 0.87 with increasing indices of urbanization calculated based on the year 2013. It reaches a maximum when the urbanization level exceeds 50 %, the urban population exceeds 20 million, or the population density becomes higher than 250 person km −2 . After the transition into the leveling-off period, sunshine duration trends are no longer significantly affected by urbanization. Meanwhile, the number of laws and regulations related to air pollution and investment in pollution treatment have been increasing in China.

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Section: Introductionmentioning

confidence: 56%

Urbanization effect on trends in sunshine duration in China

et al. 2017

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“…Due to their composition, aerosols can directly scatter and/or absorb surface solar radiation (direct radiative forcing). Also as cloud condensation nuclei, aerosols can indirectly affect surface solar radiation by altering the number of droplet condensation and cloudiness (the first and second indirect radiative forcings) [34] which corresponds to the poorest air quality in winter and spring. In summer, which has the best air quality, the air temperature and atmospheric pressure positively affect the API, while precipitation and wind speed have a negative effect.…”

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confidence: 99%

“…Only the influence of sunshine duration and wind speed on the API is significant in spring. Based on the API value, Wang et al [34] quantified the magnitude of the effect of air pollution on sunshine hours in China. This study showed that air pollution can reduce sunshine hours to some extent.…”

mentioning

confidence: 99%

Characterization of Air Pollution Index and Its Affecting Factors in Industrial Urban Areas in Northeastern China

Gong¹,

Hu²,

Liu³

et al. 2015

Pol. J. Environ. Stud.

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“…Aerosols can absorb solar radiation, resulting in a reduction in the solar radiation reaching the ground and, consequently, a reduction in the sunshine duration [11,38]. In the Haihe River basin, there is a significant correlation between the aerosol index and sunshine duration, indicating that change in aerosols has an impact on the decrease in sunshine duration.…”

Section: Discussionmentioning

confidence: 94%

“…Haihe River basin is located in Northern China (112-120 • E and [35][36][37][38][39][40][41][42][43] • N), including Beijing City, Tianjin City, most of Hebei province, northern Shandong province and Henan province, and a small part of Inner Mongolia and Liaoning province. It is bordered by the Bohai Sea in the east, the Yellow River in the south, the Shanxi plateau in the west and the Mongolia plateau in the north.…”

Section: Study Area and Datamentioning

confidence: 99%

Sunshine Duration Variability in Haihe River Basin, China, during 1966–2015

Ren

Lei

Zhang

et al. 2017

Water

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Sunshine can have a profound impact on the systematic change in climate elements, such as temperature and wind speed, and in turn affects many aspects of the human society. In recent years, there has been a substantial interest in the variation of sunshine duration due to the dramatic global climate change. Hence, there is a need to better understand the variation of sunshine duration in order to cope with climate change. This study aimed to analyze the variation of sunshine duration in Haihe River basin, China, and its relationship with temperature, wind speed and low-level cloudiness. The annual, seasonal and monthly changes of sunshine duration were analyzed based on the data collected from 33 meteorological stations over the Haihe River basin during 1966-2015. It is evident that the annual, seasonal and monthly sunshine duration shows a decreasing trend over time. In addition, the annual sunshine duration is lower with a higher climate tendency rate in the southern and eastern coastal regions than that in the northwestern regions. It is negatively correlated with temperature (r = −0.50) and low-level cloudiness (r = −0.29), but positively with wind speed (r = 0.61). Wind speed may be one of the important causes of the decrease of sunshine duration in the Haihe River basin during 1966-2015. These changes may have significant implications for the hydrological cycle in the area.

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The magnitude of the effect of air pollution on sunshine hours in China

Cited by 50 publications

References 40 publications

Urbanization effect on trends in sunshine duration in China

Urbanization effect on trends in sunshine duration in China

Characterization of Air Pollution Index and Its Affecting Factors in Industrial Urban Areas in Northeastern China

Sunshine Duration Variability in Haihe River Basin, China, during 1966–2015

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