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Song Song
School of Geographical Sciences, Guangzhou University, Guangzhou 510006, China

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Journal article
Published: 23 August 2019 in Sustainability
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Land-use change, particularly urban expansion, can greatly affect the carbon balance, both from the aspects of terrestrial ecosystems and anthropogenic carbon emissions. Coastal China is a typical region of rapid urban expansion, and obvious spatial heterogeneity exists from the north to south. However, the different urban change characteristics and the effect on carbon balance remain undetermined. By unifying the spatial-temporal resolution of carbon source and sink data, we effectively compared the carbon budgets of three coastal urban agglomerations in China. The results show that all of the three urban agglomerations have undergone an obvious urban expansion process, with the built-up area increasing from 1.03 × 104 km2 in 2000 to 3.06 × 104 km2 in 2013. For Beijing–Tianjin–Hebei (BTH), the built-up area gradually expanded. The built-up area in the Yangtze River Delta (YRD) gradually changed before 2007 but rapidly grew thereafter. The built-up expansion of the Pearl River Delta (PRD) passed through three growing stages and showed the largest mean patch size. Carbon emission spatial patterns in the three urban agglomerations are consistent with their economic development, from which the net ecosystem production (NEP) spatial patterns are very different. Compared to carbon emissions, NEP has a carbon sink effect and can absorb some carbon emissions, but the amounts were all much lower than the carbon emissions in the three urban agglomerations. The carbon sink effect in the Yangtze River Delta is the most obvious, with the Pearl River Delta following, and the lowest effect is in Beijing–Tianjin–Hebei. Finally, a scientific basis for policy-making is provided for viable CO2 emission mitigation policies.

ACS Style

Jiqun Wen; Xiaowei Chuai; Shanchi Li; Song Song; Yuanwei Li; Mengjie Wang; Shuosheng Wu. Spatial Heterogeneity of the Carbon Emission Effect Resulting from Urban Expansion among Three Coastal Agglomerations in China. Sustainability 2019, 11, 4590 .

AMA Style

Jiqun Wen, Xiaowei Chuai, Shanchi Li, Song Song, Yuanwei Li, Mengjie Wang, Shuosheng Wu. Spatial Heterogeneity of the Carbon Emission Effect Resulting from Urban Expansion among Three Coastal Agglomerations in China. Sustainability. 2019; 11 (17):4590.

Chicago/Turabian Style

Jiqun Wen; Xiaowei Chuai; Shanchi Li; Song Song; Yuanwei Li; Mengjie Wang; Shuosheng Wu. 2019. "Spatial Heterogeneity of the Carbon Emission Effect Resulting from Urban Expansion among Three Coastal Agglomerations in China." Sustainability 11, no. 17: 4590.

Journal article
Published: 05 December 2018 in Sustainability
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Soil respiration (Rs) plays an important role in the carbon budget of terrestrial ecosystems. Quantifying the spatial and temporal variations in Rs in China at the regional scale helps improve our understanding of the variations in terrestrial carbon budgets that occur in response to global climate and environmental changes and potential future control measures. In this study, we used a regional-scale geostatistical model that incorporates gridded meteorological and pedologic data to evaluate the spatial Rs variations in China from 2000 to 2013. We analysed the relationship between Rs and environmental factors, and suggest management strategies that may help to keep the terrestrial carbon balance. The simulated results demonstrate that the mean annual Rs value over these 14 years was 422 g/m2/year, and the corresponding total amount was 4.01 Pg C/year. The Rs estimation displayed a clear spatial pattern and a slightly increasing trend. Further analysis also indicated that high Rs values may occur in areas that show a greater degree of synchronicity in the timing of their optimal temperature and moisture conditions. Moreover, cultivated vegetation exhibits higher Rs values than native vegetation. Finally, we suggest that specific conservation efforts should be focused on ecologically sensitive areas where the Rs values increase significantly.

ACS Style

Jiqun Wen; Xiaowei Chuai; Shanchi Li; Song Song; Jiasheng Li; Xiaomin Guo; Lei Yang. Spatial-Temporal Changes of Soil Respiration across China and the Response to Land Cover and Climate Change. Sustainability 2018, 10, 4604 .

AMA Style

Jiqun Wen, Xiaowei Chuai, Shanchi Li, Song Song, Jiasheng Li, Xiaomin Guo, Lei Yang. Spatial-Temporal Changes of Soil Respiration across China and the Response to Land Cover and Climate Change. Sustainability. 2018; 10 (12):4604.

Chicago/Turabian Style

Jiqun Wen; Xiaowei Chuai; Shanchi Li; Song Song; Jiasheng Li; Xiaomin Guo; Lei Yang. 2018. "Spatial-Temporal Changes of Soil Respiration across China and the Response to Land Cover and Climate Change." Sustainability 10, no. 12: 4604.

Journal article
Published: 02 August 2018 in Science of The Total Environment
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The combined and individual hydrological impacts of climate variation and urbanization have been extensively discussed over the past few decades, yet little is known about the relative impact of each. In this paper we took one of the most developed regions worldwide, Yangtze River Delta, as an example to analyse the long-term relative impacts of precipitation and urbanization change on water level alterations, based on precipitation, water level series, and annual impervious area data from 1960 to 2015. Abrupt changes detection in the water level series divided the data into the pre-impact period (1960–1988) and impacted period (1989–2015), and relative impacts of precipitation and urbanization on the water level increase from pre-impacted to impacted period, as well as their spatial and seasonal variations were estimated with the elasticity method. The results indicated that the urbanization change showed no distinct influence on the water level rise in the pre-impact period, while the precipitation played distinct roles only during summer months in the impacted period; the precipitation dominated two thirds of the water level rise in flood season, and in non-flood season the urbanization controlled the two thirds of the water level rise; spatially, the water level variations in old and new urban area were dominated by precipitation and urbanization process respectively; compared with precipitation amount, the water level correlated more strongly to the contribution ratio of precipitation. The results would provide a good reference for flood control and water resource management in the river basin, especially in the economically developed areas.

ACS Style

S. Song; Y.P. Xu; Z.F. Wu; X.J. Deng; Qiang Wang. The relative impact of urbanization and precipitation on long-term water level variations in the Yangtze River Delta. Science of The Total Environment 2018, 648, 460 -471.

AMA Style

S. Song, Y.P. Xu, Z.F. Wu, X.J. Deng, Qiang Wang. The relative impact of urbanization and precipitation on long-term water level variations in the Yangtze River Delta. Science of The Total Environment. 2018; 648 ():460-471.

Chicago/Turabian Style

S. Song; Y.P. Xu; Z.F. Wu; X.J. Deng; Qiang Wang. 2018. "The relative impact of urbanization and precipitation on long-term water level variations in the Yangtze River Delta." Science of The Total Environment 648, no. : 460-471.

Preprint
Published: 13 August 2016
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Distributed/semi-distributed models are considered to be sensitive to the spatial resolution of the data input. In this paper, we take a small catchment in high urbanized Yangtze River Delta, Qinhuai catchment as study area, to analyze the impact of spatial resolution of precipitation and the potential evapotranspiration (PET) on the long-term runoff and flood runoff process. The data source includes the TRMM precipitation data, FEWS download PET data, and the interpolated metrological station data. GIS/RS technique was used to collect and pre-process the geographical, precipitation and PET series, which were then served as the input of CREST (Coupled Routing and Excess Storage) model to simulate the runoff process. The results clearly showed that, the CREST model is applicable to the Qinhuai catchment; the spatial resolution of precipitation had strong influence on the modelled runoff results and the metrological precipitation data cannot be substituted by the TRMM data in small catchment; the CREST model was not sensitive to the spatial resolution of the PET data, while the estimation fourmula of the PET data was correlated with the model quality. This paper focused on the small urbanized catchment, suggesting the influential explanatory variables for the model performance, and providing reliable reference for the study in similar area.

ACS Style

Song Song; Youpeng Xu; Jiali Wang; Jinkang Du; Jianxin Zhang; Qiang Wang. The Suitability of the Satellite Metrological Inputs Source on the Hydrological Model in a Small Urban Catchment. 2016, 1 .

AMA Style

Song Song, Youpeng Xu, Jiali Wang, Jinkang Du, Jianxin Zhang, Qiang Wang. The Suitability of the Satellite Metrological Inputs Source on the Hydrological Model in a Small Urban Catchment. . 2016; ():1.

Chicago/Turabian Style

Song Song; Youpeng Xu; Jiali Wang; Jinkang Du; Jianxin Zhang; Qiang Wang. 2016. "The Suitability of the Satellite Metrological Inputs Source on the Hydrological Model in a Small Urban Catchment." , no. : 1.

Journal article
Published: 26 March 2015 in Water
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River systems are valuable to human beings; meanwhile, they are intensively influenced by human activities, especially urbanization. In this study, based on the data derived from topographic maps and remote sensing images, the temporal and spatial change of river system geomorphology in the Taihu Region over the past 50 years was investigated in conjunction with urbanization. Results demonstrated that the number of river systems decreased drastically, that the morphology of river channels changed into wider and straighter and that the structure of river network tended to simplify in the Taihu Region in recent 50 years. Meanwhile, the changes in river density, the water surface ratio, the river development coefficient, the main river area length ratio and the box dimension in the rapid urbanization period were much greater than those in the slow urbanization period, but the decrease of river sinuosity in the slow urbanization period was more intense. Moreover, the spatial differences of the changes in the river development coefficient were the largest, and the changes in the river indicators in the low-urbanized regions were the most intense. In addition, the changes in the water surface ratio had the closest correlation with urbanization, and the relational degrees between population urbanization and the changes in river systems were the largest. The results can provide a reliable basis to determine reasonable management and conservation strategies of river systems in the Taihu Region.

ACS Style

Xiaojun Deng; Youpeng Xu; Longfei Han; Song Song; Liu Yang; Guang Li; Yuefeng Wang. Impacts of Urbanization on River Systems in the Taihu Region, China. Water 2015, 7, 1340 -1358.

AMA Style

Xiaojun Deng, Youpeng Xu, Longfei Han, Song Song, Liu Yang, Guang Li, Yuefeng Wang. Impacts of Urbanization on River Systems in the Taihu Region, China. Water. 2015; 7 (12):1340-1358.

Chicago/Turabian Style

Xiaojun Deng; Youpeng Xu; Longfei Han; Song Song; Liu Yang; Guang Li; Yuefeng Wang. 2015. "Impacts of Urbanization on River Systems in the Taihu Region, China." Water 7, no. 12: 1340-1358.