Nonlinear time series analysis of ground-level ozone dynamics in Southern Taiwan

Weng, Yu-Chi; Chang, Ni‐Bin; Lee, T.Y.

doi:10.1016/j.jenvman.2007.01.023

Cited by 45 publications

(21 citation statements)

References 48 publications

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“…When the value of H ranges between 0 and 0.5, it indicates that the time series shows anti-persistent behavior (a negative correlation), which means the future trend of the time series will be the opposite of the past. Additionally, the degree of anti-persistence depends on the extent of H's closeness to 0 [43,[46][47][48]. In our case, if the past decoupling degree has a reductive (or increase) trend, the disparity of the future will assume the increase (or reductive) trend.…”

Section: Hurst Exponentmentioning

confidence: 99%

The Decoupling of Resource Consumption and Environmental Impact from Economic Growth in China: Spatial Pattern and Temporal Trend

et al. 2016

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Abstract:Unprecedented economic achievement in China has occurred along with rising resource consumption and waste productions levels. The goal of sustainability requires the decoupling of economic growth from resource consumption (resource decoupling) and environmental degradation (impact decoupling). For this paper, the performances of resource decoupling (energy and water) and impact decoupling (wastewater, SO 2 and CO 2 ) in China were evaluated, and the spatial pattern and temporal trend of decoupling performance were investigated by using the rescaled range analysis (R/S). The results indicate the following. (1) The performance of resource decoupling during the investigated period is worse than that of traditional impact (SO 2 and wastewater) decoupling, but better than that of the CO 2 emission. Additionally, the decoupling performances of energy consumption and related pollutant emission (except CO 2 ) are better than that of water usage and wastewater discharge; (2) The decoupling performance of energy consumption, SO 2 and CO 2 , has substantially improved from the 10th Five-Year Planning Period (FYP) (2001)(2002)(2003)(2004)(2005) to the 11th FYP (2006)(2007)(2008)(2009)(2010), which indicates that the decoupling performance is highly related the environmental policy; (3) The spatial disparities of the performance of resource and impact decoupling are declining, which indicates the existence of cross-province convergence in decoupling performance; (4) The decoupling performance of SO 2 and water usage in most of regions shows an improving trend. Inversely, the decoupling performance of energy consumption, CO 2 emission, and wastewater discharge in most regions show a decreasing trend; (5) China needs more stringent water-saving targets and wastewater discharge standards; better policy efforts to improve the water recycling level both in agricultural, industrial and municipal level are required to prevent the decreasing trend of the decoupling performance.

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Section: Hurst Exponentmentioning

confidence: 99%

The Decoupling of Resource Consumption and Environmental Impact from Economic Growth in China: Spatial Pattern and Temporal Trend

et al. 2016

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“…DFA has advantages over other methods of persistence analysis such as spectral analysis and rescale-range analysis as it can avoid spurious detection of correlations due to non-stationarity (Shi and Liu, 2009) and can be applied even in the presence of trends in the time series (Varotsos et al, 2005;Shi and Liu, 2009). The long memory property using DFA has been inferred in air pollutant concentrations in several studies (Varotsos et al, 2005;Lu and Wang, 2006;Varotsos and Kirk-Davidoff, 2006;Varotsos et al, 2007;Weng et al, 2008;Lau et al, 2009;Yuval and Broday, 2010;Chelani, 2012).…”

Section: Introductionmentioning

confidence: 98%

Study of Extreme CO, NO2 and O3 Concentrations at a Traffic Site in Delhi: Statistical Persistence Analysis and Source Identification

Chelani

2013

Aerosol Air Qual. Res.

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Persistence in the air pollutant concentration events exceeding the standard threshold was studied by using detrended fluctuation analysis. Time series of gaseous pollutant concentrations of CO, NO 2 and O 3 observed during 2000-2009 at a traffic site in Delhi were considered in this study. Statistical persistence was observed in exceeding concentration events of CO and NO 2 , whereas O 3 exceeding time series showed anti-persistent behavior due to its secondary nature. The formation of O 3 formation was explored by examining its relations with precursor pollutants. A high proportion of the exceeded O 3 concentration was observed to be CO limited. Back trajectory analysis was then carried out to trace the path of the air parcels with high ozone concentration events, suggesting two clusters of trajectories; one from south-east and the other from northwest of the study site.

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“…When the value of H ranges between 0 and 0.5, it indicates the time seriesshows anti-persistent behavior (a negative correlation) which means the future trendof time series will be opposite from the past. And the degree of anti-persistent depends on the extent for H's closeness to 0 (Parmar and Bhardwaj, 2013, Weng et al , 2008, Xu, Lu, 2004. In our case, if thepast decoupling degree hasareductive(or increase) trend, the decoupling degree of the future will assumethe increase (or reductive) trend.…”

Section: R/s Analysis Of Decoupling Trendmentioning

confidence: 77%

Empirical study on the environmental pressure versus economic growth in China during 1991–2012

Zhang

Chen

Heck

et al. 2015

Resources, Conservation and Recycling

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Abstract:Abstract: Since adoption of the policy of reform and opening-up in 1978, China has achieved spectacular success in economic growth, which mainly driven by abundant consumption of natural resources but resulted in serious environmental problems. Based on Emergy approach and Rescaled Range analysis, this paper aims to examine the decoupling condition in economic growth nexus environmental pressureboth at specific and aggregate level and track the changing trend and the corresponding socio-economic cost in decoupling process. The results show that: the decoupling performance of waste emission (includes waste water, SO 2 and solid waste) is better than energy consumption at a specific level which implies that the policies focused on end-of-pipe treatment has been succeeded in meeting the targets of emission reduction.But at aggregate level, the situation is opposite which suggest that China need more efforts in life-cycle management; The weak decoupling condition of resource use and waste water discharge may continue in the future, so as the strong decoupling condition of SO 2 and solid waste, but for the aggregate environmental pressure induced by waste emission, the decoupling performance may be getting worse in the future; The investment cost of decoupling increased, whilst the job-cost of decoupling decreased; The decoupling performance can be influenced by environmental policies substantially, such as the polices of circular economy, rigorous emission reduction and waste recycling which have brought about the strong decoupling SO 2 emission and solid waste discharge from economic growth, whereas the less rigorous policies on resource exploitation and waste water discharge didn't achieve the same result. Therefore, China needsto intensify the unity among various environmental policies. Highlights The decoupling performance of waste emission is better than energy consumption at a specific level, but at aggregate level, the situation is opposite. The weak decoupling condition of resource use and waste water discharge may continue in the future, so as the strong decoupling condition of SO 2 and solid waste, but for the decoupling performance of the aggregate environmental pressure induced by waste emission may be getting worse in the future. The decoupling performance can be influenced by environmental policies substantially  The investment cost of decoupling increased, whilst the job-cost of decoupling decreased

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Nonlinear time series analysis of ground-level ozone dynamics in Southern Taiwan

Cited by 45 publications

References 48 publications

The Decoupling of Resource Consumption and Environmental Impact from Economic Growth in China: Spatial Pattern and Temporal Trend

The Decoupling of Resource Consumption and Environmental Impact from Economic Growth in China: Spatial Pattern and Temporal Trend

Study of Extreme CO, NO2 and O3 Concentrations at a Traffic Site in Delhi: Statistical Persistence Analysis and Source Identification

Empirical study on the environmental pressure versus economic growth in China during 1991–2012

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