China's changing landscape during the 1990s: Large‐scale land transformations estimated with satellite data

Liu, Jiyuan; Tian, Hanqin; Liu, Mingliang; Zhuang, Dafang; Melillo, Jerry M.; Zhang, Zengxiang

doi:10.1029/2004gl021649

Cited by 204 publications

(170 citation statements)

References 16 publications

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“…However, urban area only takes up approximately 5% area in China while cropland is the dominant surface type also featuring dense population and high PM2.5 exposure (Liu, 2005;Xu et al, 2011). Frequent regional-scale haze pollution and cropland-dominant land cover in China make 15 it necessary to figure out this interaction over rural area Zhao et al, 2013b).…”

Section: A Comparison Of the Dome Effect Over Urban And Rural Areasmentioning

confidence: 99%

Dome effect of black carbon and its key influencing factors: A one-dimensional modelling study

Wang¹,

Huang²,

Ding³

2017

Preprint

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Black carbon (BC) has been identified to play a critical role in aerosol-planet boundary layer (PBL) interaction and further deterioration of near-surface air pollution in megacities, which has been named as its "dome effect". However, the impacts of key factors that influence this effect, such as the vertical distribution and aging processes of BC, and also the underlying land surface, have not been quantitatively explored yet. Here, based on available in-situ measurements of meteorology and 15 atmospheric aerosols together with the meteorology-chemistry online coupled model, WRF-Chem, we conduct a set of parallel simulations to quantify the roles of these factors in influencing the BC's dome effect and surface haze pollution, and discuss the main implications of the results to air pollution mitigation in China. We found that the impact of BC on PBL is very sensitive to the altitude of aerosol layer. The upper level BC, especially those near the capping inversion, is more essential in suppressing the PBL height and weakening the turbulence mixing. The dome effect of BC tends to be significantly intensified 20 as BC aerosol mixed with scattering aerosols during winter haze events, resulting in a decrease of PBL height by more than 25%. In addition, the dome effect is more substantial (up to 15%) in rural areas than that in the urban areas with the same BC loading, indicating an unexpected regional impact of such kind of effect to air quality in countryside. This study suggests that China's regional air pollution would greatly benefit from BC emission reductions, especially those from the elevated sources from the chimneys and also the domestic combustions in rural areas, through weakening the aerosol-boundary layer 25 interactions that triggered by BC.

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Section: A Comparison Of the Dome Effect Over Urban And Rural Areasmentioning

confidence: 99%

Dome effect of black carbon and its key influencing factors: A one-dimensional modelling study

Wang¹,

Huang²,

Ding³

2017

Preprint

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“…The China Land Cover Dataset (CLCD) provides spatially explicit measurements of urban land cover change for the period 1990-2000 and is considered the country's primary national inventory of land cover (Liu et al, 2005). The dataset was derived from a mosaic of scenes from the Landsat TM/ETM sensors 524 scenes from 1988-1990 and 512 scenes from 1999-2000.…”

Section: Speci Cationsmentioning

confidence: 99%

“…The dataset was derived from a mosaic of scenes from the Landsat TM/ETM sensors 524 scenes from 1988-1990 and 512 scenes from 1999-2000. Scenes were selected for the CLCD based on low atmospheric e ects and from the peak agricultural season in order to maximize the vegetation signal (Liu et al, 2005). The Landsat TM data have been aggregated into a 1X1 km 2 grid at the national level.…”

Section: Speci Cationsmentioning

confidence: 99%

Geographic determinants of China's urbanization

Christensen

McCord

2016

Regional Science and Urban Economics

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This study exploits a unique set of satellite and other spatially explicit data to examine the role of three exogenous geographic factors in shaping and constraining urbanization: biophysical land suitability for agriculture, distance to major ports and terrain slope. The setting is China in the 1990's, the most expansive process of urban growth in history. Our empirical results suggest that these geographical factors explain nearly half of the variation in urbanization levels. However, controlling for long-run levels, we nd a weakly negative relationship between agricultural land suitability and urban expansion from 1990-2000, which is consistent with the theoretical expectations that rising opportunity costs a ect the development of fertile lands. We examine heterogeneity in the e ects of geography using interactions with province xed e ects and, even more exibly, with a localized regression technique (geographically weighted regression). Our results indicate that agricultural land suitability has opposing e ects in di erent regions, for example leading to increased urban expansion in the Pearl River Delta and restricting urban expansion along the northern coast. These results should caution scholars against assuming homogeneous e ects of physical geography across regions when doing empirical analysis of urban dynamics.

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“…Land use and land cover change data on the Loess Plateau from 2000 to 2010 with spatial resolution of 30 m were determined following the standardized methodology outlined in [37,38]. A hierarchical classification system with 25 types of land use and land cover classes were further grouped into 6 aggregated classes consists of cropland, forest, grassland, water bodies, unused land and built-up areas.…”

Section: Land Use and Land Cover Changementioning

confidence: 99%

Human-Induced Landcover Changes Drive a Diminution of Land Surface Albedo in the Loess Plateau (China)

et al. 2015

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A large decrease in the land surface albedo of the Loess Plateau was observed from 2000 to 2010, as measured using satellite imagery. In particular, ecological restoration program regions experienced a decrease in peak season land surface albedo exceeding 0.05. In this study, we examined the spatial and temporal patterns of variation during the peak season albedo in the Loess Plateau and analyzed its relationships with changes of anthropogenic and natural factors at the pixel level. Our analysis revealed that increasing grassland coverage due to returning rangeland to grassland could lead to a maximum albedo decrease of 0.030 in peak season. This result highlighted the human-induced land use change in driving the decreasing albedo on an annual scale. There was no significant correlation between precipitation change and albedo reduction. Precipitation could influence the spatial pattern of albedo in drought years by influencing the natural vegetation water requirement. However, the role of precipitation was not obvious in the ecological restoration program regions. This article demonstrates the substantial role that land use change could play in regional-scale albedo change and climate. Finally, some implications for the radiative forcing of land use change are discussed.

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China's changing landscape during the 1990s: Large‐scale land transformations estimated with satellite data

Cited by 204 publications

References 16 publications

Dome effect of black carbon and its key influencing factors: A one-dimensional modelling study

Dome effect of black carbon and its key influencing factors: A one-dimensional modelling study

Geographic determinants of China's urbanization

Human-Induced Landcover Changes Drive a Diminution of Land Surface Albedo in the Loess Plateau (China)

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