“…At a global scale, brightening mainly occurs in industrialized regions, accompanying a slowdown in anthropogenic emissions and economic growth (Wild, , 2012a. Similarly, there was improvement of air quality in China in the early 21st century Shaw et al, 2010;Lei et al, 2011b;Wang et al, 2012Wang et al, , 2013. In fact, a tremendous effort is applied to sustain economic development and intensive environmental protection since the start of China's environmental protection in the 1970s.…”
Section: Discussion and Suggestions For Future Researchmentioning
Abstract. There is growing evidence that, corresponding to global dimming and brightening, surface solar radiation and sunshine hours over China have undergone decadal fluctuations during the 1960s-2000s. The results of a number of these analyses are, however, very different. In this study, we synthesize reliable results and conclusively address recent advances and insufficiencies in studies on dimming and brightening in China. A temporally and spatially prevalent dimming trend is noted in surface solar radiation, direct solar radiation and sunshine hours since the 1960s. Meanwhile, the changing trend in diffuse solar radiation is less pronounced. Increasing anthropogenic aerosol loading is regarded as the most plausible explanation for China's dimming. The brightening trend since 1990, which mainly occurs in southeastern China and in the spring season, is weak and insignificant. The reverse in the solar radiation trend is associated with climate change by cloud suppression and slowdown in anthropogenic emissions. The future solar radiation trend in China could largely depend on the development of air quality control. Other potential driving factors such as wind speed, water vapor and surface albedo are also non-negligible in specific regions of China. Hydrological implications of dimming and brightening in China lack systematic investigation. However, the fact that solar radiation and pan evaporation trends in China track a similar curve in 1990 further suggests that the pan evaporation paradox could be partly resolved by changes in solar radiation.
“…At a global scale, brightening mainly occurs in industrialized regions, accompanying a slowdown in anthropogenic emissions and economic growth (Wild, , 2012a. Similarly, there was improvement of air quality in China in the early 21st century Shaw et al, 2010;Lei et al, 2011b;Wang et al, 2012Wang et al, , 2013. In fact, a tremendous effort is applied to sustain economic development and intensive environmental protection since the start of China's environmental protection in the 1970s.…”
Section: Discussion and Suggestions For Future Researchmentioning
Abstract. There is growing evidence that, corresponding to global dimming and brightening, surface solar radiation and sunshine hours over China have undergone decadal fluctuations during the 1960s-2000s. The results of a number of these analyses are, however, very different. In this study, we synthesize reliable results and conclusively address recent advances and insufficiencies in studies on dimming and brightening in China. A temporally and spatially prevalent dimming trend is noted in surface solar radiation, direct solar radiation and sunshine hours since the 1960s. Meanwhile, the changing trend in diffuse solar radiation is less pronounced. Increasing anthropogenic aerosol loading is regarded as the most plausible explanation for China's dimming. The brightening trend since 1990, which mainly occurs in southeastern China and in the spring season, is weak and insignificant. The reverse in the solar radiation trend is associated with climate change by cloud suppression and slowdown in anthropogenic emissions. The future solar radiation trend in China could largely depend on the development of air quality control. Other potential driving factors such as wind speed, water vapor and surface albedo are also non-negligible in specific regions of China. Hydrological implications of dimming and brightening in China lack systematic investigation. However, the fact that solar radiation and pan evaporation trends in China track a similar curve in 1990 further suggests that the pan evaporation paradox could be partly resolved by changes in solar radiation.
“…For example, Tsurumi and Managi (2010) applied a semiparametric method of generalised additive models and functional forms and Shaw et al (2010) used the instrumental variable approach. This study employs a spatial lag econometric model to estimate the effect of per capita forest on emission of CO 2 while explaining the EKC hypothesis in the US at the county level.…”
This paper investigates the net effect of forest resources on the emission of CO 2 while testing the EKC hypothesis for CO 2 at the county level in the US. Using a countylevel data obtained from the Vulcan Project and employing a weighted lag-dependent variable of CO 2 emissions, an inverted-U-shaped relationship between income and emissions of CO 2 per capita is detected in the US. However, the estimated income turning points (ITPs) are slightly higher than the average income per capita but are within an attainable range, suggesting that further economic growth would be a viable environmental policy to address the emissions of CO 2 in the US. The estimated net effect of forests resources on the emissions of CO 2 suggests that forest fires and degradation dominate the carbon sequestration capacity of standing forests in the US.
“…Shen (2006) recourt à un système d'équations simultanées (SES), pour tenir compte de la détermination conjointe du revenu et des émissions, et découvre cette fois-ci une CKE en forme de U non inversé. Pourtant, en utilisant un moindre carré à deux étapes (MCDE) avec un SES, Shaw et al (2004) (Andreoni et Levinson, 1998). Cet avantage comparatif se manifeste clairement en Chine (Wang et Wheeler, 2005).…”
Section: Les éTudes De La Cke Sur Le So 2 En Chineunclassified
L’intensité de pollution inférieure des firmes de grande taille et leurs moindres coûts marginaux de réduction des émissions demeurent un fait largement documenté dans la littérature empirique. En poursuivant les intuitions de Merlevede et al. (2006), nous examinons l’hypothèse qu’avec l’accroissement du développement économique, la présence de firmes industrielles de taille supérieure (en moyenne) devient négativement associée aux émissions de SO2 en raison de l’avantage comparatif des grandes firmes à réduire leurs émissions polluantes à un moindre coût marginal. La courbe de Kuznets environnementale (CKE) est l’instrument par lequel nous comparons l’impact de la présence de grandes firmes sur les émissions de SO2 par habitant pour 29 provinces et villes chinoises. Pour vérifier la robustesse des résultats, trois différents indicateurs de taille sont retenus. Même si les estimations tendent à confirmer que les firmes de grande taille sont associées à une meilleure performance environnementale, les résultats demeurent fortement sensibles au choix de la forme fonctionnelle.
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