Shenzhen Environmental Monitoring Center

Shenzhen, China

Shenzhen Environmental Monitoring Center

Shenzhen, China
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Yuan Y.,Hubei University | Zhao T.,Chinese Academy of Sciences | Wang W.,Shenzhen Environmental Monitoring Center | Chen S.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Wu F.,Beijing Normal University
Advances in Meteorology | Year: 2013

Land use/cover change (LUCC) is an important part of the global environmental change. This study predicted the future structure of land use/cover on the basis of the Global Change Assessment Model (GCAM) and an econometric model with the socioeconomic factors as the driving forces. The future spatial pattern of land use/cover in China was simulated with the Dynamics of Land System (DLS) under the Business as Usual scenario, Rapid Economic Growth scenario and Cooperate Environmental Sustainability scenario. The simulation results showed that the land use/land cover in China will change continually due to the human activities and climate change, and the spatial pattern of land use/cover will also change as time goes by. Besides, the spatial pattern of land cover in China under the three scenarios is consistent on the whole, but with some regional differences. Built-up area will increase rapidly under the three scenarios, while most land cover types will show a decreasing trend to different degrees under different scenarios. The simulation results can provide an underlying land surface data and reference to the methodology research on the prediction of LUCC. © 2013 Yongwei Yuan et al.

Zhao C.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Zhao C.,Chinese Academy of Sciences | Zhao C.,University of Chinese Academy of Sciences | Deng X.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | And 4 more authors.
Advances in Meteorology | Year: 2013

Yunnan province is the core region of the drought in the Southwest China, which makes the region become the hot spot in the meteorological research. However, among the various influencing factors of the drought in Yunnan province, the influence of the land use/cover change (LUCC) on the drought has not been quantitatively analyzed. The LUCC in recent decades was first quantitatively analyzed in this study. Given the fact that severe drought in Yunnan province is mainly due to much-less-than-normal precipitation and much-warmer-than-normal surface temperature, this study focused on the future spatiotemporal heterogeneity of the temperature and precipitation, which have great impacts on the drought. Finally, the influencing factors of drought in Yunnan province were simulated with the Weather Research and Forecasting (WRF) model, and the risk of drought was spatially analyzed with the meteorological drought composite index. The results indicate that the large-area forest plays a more important role in alleviating the risk of drought than other vegetation types do. Besides, the changes of the landscape structure resulting from the urban expansion play a significant role in intensifying the risk of drought. © 2013 Chunhong Zhao et al.

Liu K.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Su H.,Florida Atlantic University | Li X.,University of Connecticut | Wang W.,Shenzhen Environmental Monitoring Center
ACRS 2015 - 36th Asian Conference on Remote Sensing: Fostering Resilient Growth in Asia, Proceedings | Year: 2015

The purpose of this study is to comprehensively quantify the spatial-temporal patterns of surface urban heat island (SUHI) by investigating the relationship between Land surface temperature (LST) and the land-cover types and associated landscape components in the case of Beijing, China. The Spatial and Temporal Adaptive Fusion Model (STARFM) developed by Gao et al. was employed to create the high spatial resolution LST time series, using LST data from the MODIS/Terra and LANDSAT 8 over the period from May to November in 2013. This paper also investigated the application of the Chinese new high spatial resolution satellite GaoFen-1 in urban thermal environments studies which were insufficiently studied previously. The impacts of four Landscape Metrics (LSMs) on urban LST were investigated on the basis of two scenes of GaoFen images acquired in 2013 summer (June 19 and August 10). Results showed that SUHI effect was prevalent in Beijing from May to October. The intensity of SUHI magnitude was found accentuated mainly in the summer months (July and August), indicating the trend of surface UHI effect is inconsistent with that of canopy-layer UHI effect. No obvious linear relationships were observed between mean subplot LST and impervious surfaces LSMs. However, four impervious surfaces LSMs were correlated well with the temporal dynamics of LST. We also found the configurational patterns of green space could put substantial influences as strong as corresponding compositional patterns and the lower vegetation coverage in downtown could better account for the urban LST.

He L.,Shenzhen Environmental Monitoring Center | Dai G.,GD Air Testing Inc.
Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA | Year: 2012

Organic sulfur compounds in environmental gases were analyzed using the EPA TO-15 method. The method used a pre-concentrator system with GC/MS for identification and quantization analysis with silica canisters or Summa canisters as sampling devices. The method detected the concentration of most organic sulfur compounds such as methyl mercapton, dimethyl sulfide, carbon disulfide, and dimethyl disulfide mixed with hydrogen sulfide in the sub ppb level. The linear calibration, replicates, MDL, blank and stability data were all within the EPA QC control range. The stability of hydrogen sulfide in the canister was less than 3 days while the stability of some of the other organic sulfur compounds was less than 6 days. This is an abstract of a paper presented at the 106th AWMA Annual Conference and Exhibition (Chicago, IL 6/25-28/2013).

Yu L.,Harbin Institute of Technology | Kang J.,University of Sheffield | Hong L.,Shenzhen Environmental Monitoring Center | Xie C.,Harbin Institute of Technology
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control | Year: 2014

Living in modern cities is being interfered by ambitious noise more and more seriously. Present controlling approach is to monitor sound pressure level, which only describes one characteristic of a sound environment and ignores its influence on people too. Many studies proved that noise annoyance is not only determined by sound pressure level but also by soundscape that a person identifies. Since a bird singing or water babbling is perceived quieter than a traffic roaring even both having the same sound pressure level, it is considered that soundscape identification plays an important role in subjective evaluation of noise annoyance. Therefore, this study is going to explore how soundscape identification in determining noise annoyance evaluation within a city context. The study investigates four places in an ecological residential area that contains completely nature, nature mixed with man-made, and complete man-made soundscapes. Using recordings of the four study-sites, physical characteristics of a diversity soundscape have been analyzed and relationships of a soundscape's physical characteristics with noise annoyance evaluation have been studied.

Hong L.,Shenzhen Environmental Monitoring Center | Yu L.,Harbin Institute of Technology | Zhao K.S.,Shenzhen Environmental Monitoring Center | Di Zhang M.,Shenzhen Environmental Monitoring Center
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control | Year: 2014

Shenzhen is a rapid developing city in Chinese urbanization. With thirty-year development, the city is derived from a rural into the fourth metropolis in China. In such a dramatic transforming, the area's ecological environment has been changed tremendously, in which its sonic environment including sound level and sound sources has been changed too. No doubtfully, many man-made sounds have penetrated into the area and original natural sounds are dying away. In order to reveal how much sound source is having been and will be changed in the Shenzhen's urbanization, the Shenzhen Environmental Monitoring Centre (SEMC) started a project of recording and monitoring sound sources and their changes with the whole city context. In this paper, works of the SEMC in investigating sound sources and their distribution around the inner Shenzhen are demonstrated. It is expected to show an ecological diverse of sound in Shenzhen. The study is also supposed to express an ecological variation of acoustic environment in terms of sound sources. Moreover, the study result will be used to effectively monitor sound changes of the Shenzhen in order to provide useful guidelines to the city planners and designers in creating more sonic pleasure open spaces for the Shenzhen's further development.

PubMed | Agilent Technologies, Shenzhen University and Shenzhen Environmental Monitoring Center
Type: Journal Article | Journal: Environmental science and pollution research international | Year: 2016

Using inductively coupled plasma mass spectrometry (ICP-MS), the lead concentrations and isotope ratios of 32 kinds of seafood collected from local markets of China were measured. Among these seafoods, the highest concentrations of lead were found in Patinopecten yessoensis and Mugil cephalus, which were 2.940.40 and 2.020.26 g g(-1) of dry weight, respectively. Pb concentration was found to be higher in benthic fish than in other fish. The result indicated that lead concentrations in some seafood exceeded the maximum levels of Pb in foods proposed by European Commission (EC). Nine species of cooked seafood were chosen to feed mice (35-38 g). The result showed that Pb oral bioavailability of cooked seafood in vivo was below 10%. Furthermore, oral bioavailability of the same lead-containing seafood increased greatly in pregnant mice compared with non-pregnant mice.

Zhang F.,Wuhan University | Li X.,Wuhan University | Wang W.,Shenzhen Environmental Monitoring Center | Ke X.,Huazhong Agricultural University | And 2 more authors.
Advances in Meteorology | Year: 2013

Climate change caused by land use/cover change (LUCC) is becoming a hot topic in current global change, especially the changes caused by the grassland degradation. In this paper, based on the baseline underlying surface data of 1993, the predicted underlying surface data which can be derived through overlaying the grassland degradation information to the map of baseline underlying surface, and the atmospheric forcing data of RCP 6.0 from CMIP5, climatological changes caused by future grassland changes for the years 2010-2020 and 2040-2050 with the Weather Research Forecast model (WRF) are simulated. The model-based analysis shows that future grassland degradation will significantly result in regional climate change. The grassland degradation in future could lead to an increasing trend of temperature in most areas and corresponding change range of the annual average temperature of -0.1°C-0.4°C, and it will cause a decreasing trend of precipitation and corresponding change range of the annual average precipitation of 10 mm-50 mm. This study identifies lines of evidence for effects of future grassland degradation on regional climate in Mongolia which provides meaningful decision-making information for the development and strategy plan making in Mongolia. © 2013 Fan Zhang et al.

Wang W.,Shenzhen Environmental Monitoring Center | Hong L.,Shenzhen Environmental Monitoring Center | Yang L.,Shenzhen Environmental Monitoring Center | He L.,National Marine Environmental Monitoring Center | Dong G.,National Marine Environmental Monitoring Center
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2016

In the past three decades, the Shenzhen city, which is located in south of China, has experienced a rapid urbanization process characterized by sharp decrease in farmland and increases in urban area. This rapid urbanization is one of the main causes of many environmental and ecological problems including urban heat island (UHI). Therefore, the monitoring of rapid urbanization regions and the environment is of critical importance for their sustainable development. In this study, Landsat-8 OLI and TIR images, which were acquired on 2013, are used to monitor urban heat island. After radiometric calibration and atmospheric correction with a simplified method for the atmospheric correction (SMAC) are applied to OLI image, an index-based build-up index (IBI), which is based on the soil adjusted vegetation index (SAVI), the modified normalized difference water index (MNDWI) and the normalized difference built-up index (NDBI), is employed to extract the build-up land features with a given thresholds. A single-channel algorithm is used to retrieve land surface temperature while the land surface emissivity is derived from a normalized differential vegetation index (NDVI) thresholds method. Surface urban heat island index (SUHII) and urban heat island ratio index (URI) are computed for ten districts of Shenzhen based on build-up land distribution and land surface temperature data. A correlation analysis is conducted between heat island index (including SUHII and URI) and socio-economic statistics (including total population and population density) also are included in this analysis. The results show that, a weak relationship between urban heat island and socio-economic statistics are found. © 2016 SPIE.

Jiang B.,Shenzhen Environmental Monitoring Center | Pang H.,Chinese Academy of Sciences | Pang H.,Guangzhou GIC Green Building Materials Academy
Journal of Polymer Science, Part A: Polymer Chemistry | Year: 2016

Thermo-responsive block-graft fluoropolymer is synthesized and investigated the self-assembly morphology and the tunable wettability surface on cotton fabric by dip-coating into the micelles with different temperatures. Well-defined block-graft copolymer is prepared by click chemistry with poly(hexafluorobutyl methacrylate)-block-poly(glycidyl methacrylate) (PHFBMA-b-PGMA) and homopolymer poly(N-isopropylacrylate) with alkyne on main chain (Alkynyl-PNIPAM) to synthesize final block-graft polymer PHFBMA-b-(PGMA-g-PNIPAM). The thermo-responsive behaviors of block-graft polymer prove that the diameter for fluoropolymer micelle is about 50-70 nm with uniform sphere shape at room temperature and bigger and broader at 40 °C. The surface of cotton fabric processed in micelle solution at room temperature is smooth and has good hydrophobic property, while it has the hydrophilic property dipped in high temperature micelle solution. This work may give valuable guidance for fabricating a facile strategy to establish controllable wettability surfaces on different substrates, which is a promising candidate for the coating materials and industrial fields. © 2015 Wiley Periodicals, Inc.

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