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| 1 | Black carbon aerosols and their radiative properties in the Pearl River Delta region显示文摘The climatic and environmental effects of atmospheric aerosols are a hot topic in global science community, and radiative properties of the aerosols are one of the important parameters in assessing climatic change. Here we studied the black carbon concentration and absorption coefficient measured with aethalometers, scattering coefficient measured with nephelometers, and single scattering albedo derived at an atmospheric composition watch station in Guangzhou from 2004 to 2007. Our main results are as follows. The data of black carbon concentration and absorption coefficients measured with instruments cannot be directly used until they are measured in parallel with internationally accepted instruments for comparison, calibration, and reduction. After evaluation of the data, the result shows that the monthly mean of BC concentration varies 3.1―14.8 μg·m-3 and the concentration decreases by about 1 μg·m-3 in average over the four years; It is higher in the dry season with a multi-year mean of 8.9 μg/m3 and lower in the rainy season with a multi-year mean of 8.0 μg·m-3; The extreme maximum of monthly mean concentration occurred in December 2004 and extreme minimum in July 2007, and a 4-year mean is 8.4 μg·m-3. It is also shown that monthly mean scattering coefficient derived varies 129 -565 Mm-1, monthly mean absorption coefficient 32-139 Mm-1, and monthly mean single scattering albedo 0.71-0.91, with annual mean values of 0.80, 0.82, 0.79 and 0.84 for 2004, 2005, 2006 and 2007, respectively. Three instruments were used to take simultaneous measurements of BC in PM10, PM2.5, and PM1 and the results showed that PM2.5 took up about 90% of PM10 and PM1 accounted for about 68% of PM2.5, and BC aerosols are mainly present in fine particulates. The variability of BC concentrations is quite consistent between the Nancun station (141 m above sea level) and the Panyu station (13 m above sea level), which are 8 km apart from each other. The concentration in higher altitude station (Panyu) is consistently lower than the lower altitude station (Nancun), and the difference of annual mean is about 4 μg·m-3. | WU Dui MAO JieTai DENG XueJiao TIE XueXi ZHANG YuanHang ZENG LiMin LI Fei TAN HaoBo BI XueYan HUANG XiaoYing CHEN Jing DENG Tao | 2009 | Science China Earth Sciences2009，52，8： | 58 |
| 2 | Effect of atmospheric aerosol on surface ozone variation over the Pearl River Delta region显示文摘Our analysis of the surface aerosol and ultraviolet(UV) measurements in Pearl River Delta(PRD) region shows that the sur-face UV radiation is reduced by more than 50% due to high aerosol concentrations.This has important impacts on urban eco-system and photochemistry,especially on ozone photochemical production over the region.The quantitative effect of aerosols on surface ozone is evaluated by analyzing surface observations(including ozone,ultraviolet radiation,aerosol radiative pa-rameters) and by using radiative and chemical models.A case study shows that the aerosol concentrations and UV radiation are significantly correlated with ozone concentrations.The correlation coefficient between the aerosol optical depth(AOD) and the PM10 mass concentration is very high,with a maximum of 0.98,and the AOD and UV radiation/ozone is anti-correlated,with a correlation coefficient of -0.90.The analysis suggests that ozone productivity is significantly decreased due to the reduction of UV radiation.The noon-time ozone maximum is considerably depressed when AOD is 0.6,and is further decreased when AOD is up to 1.2 due to the reduction of ozone photochemical productivity.Because the occurring probability of aerosol optical depth for AOD550 nm≥0.6 and AOD340 nm≥1.0 is 47,and 55% respectively during the dry season(October,November,December,January),this heavy aerosol condition explains the low ozone maximum that often occurs in the dry season over the Guangzhou region.The analysis also suggests that the value of single scattering albedo(SSA) is very sensitive to the aerosol radiative effect when the radiative and chemical models are applied,implying that the value of SSA needs to be carefully studied when the models are used in calculating ozone production. | DENG XueJiao ZHOU XiuJi WU Dui TIE XueXi TAN HaoBo LI Fei BI XueYan DENG Tao JIANG DeHai | 2011 | Science China Earth Sciences2011，54，5： | 10 |
| 3 | Serum uric acid and risk of incident diabetes in middle-aged and elderly Chinese adults: prospective cohort study显示文摘The association between serum uric acid and the risk of incident diabetes in Chinese adults remains unknown.This study aimed to investigate this association in a community-dwelling population aged≥40 years in Shanghai,China.Oral glucose tole3rance test was conducted during baseline and follow-up visits.Relative risk regression was utilized to examine the associations between baseline gender-specific serum uric acid levels and incident diabetes risk.A total of 613(10.3%)incident diabetes cases were identified during the follow-up visit after 4.5 years.Fasting plasma glucose,postload glucose,and glycated hemoglobin A1c during the follow-up visit progressively increased across the sex-specific quartiles of serum uric acid(all Ps<0.05).The incidence rate of diabetes increased across the quartiles of serum uric acid(7.43%,8.77%,11.47%,and 13.43%).Multivariate adjusted regression analysis revealed that individuals in the highest quartile had 1.36-fold increased risk of diabetes compared with those in the lowest quartile of serum uric acid(odds ratio(95%confidence interval)=1.36(1.06−1.73)).Stratified analysis indicated that the association was only observed in women.Accordingly,serum uric acid was associated with the increased risk of incident diabetes among middle-aged and elderly Chinese women. | Di Cheng Chunyan Hu Rui Du Hongyan Qi Lin Lin Xueyan Wu Lina Ma Kui Peng Mian Li Min Xu Yu Xu Yufang Bi Weiqing Wang Yuhong Chen Jieli Lu | 2020 | Frontiers of Medicine2020，14，6： | 3 |
| 4 | An extremely low visibility event over the Guangzhou region: A case study显示文摘 | Dui Wu Xuexi Tie Chengcai Li Zhuming Ying Alexis Kai-Hon Lau Jian Huang Xuejiao Deng Xueyan Bi | 2005 | Atmospheric Environment2005，，35： | 2 |
| 5 | Long-term trend of visibility and its characterizations in the Pearl River Delta (PRD) region, China显示文摘 | Xuejiao Deng Xuexi Tie Dui Wu Xiuji Zhou Xueyan Bi Hanbo Tan Fei Li Chenglin Jiang | 2007 | Atmospheric Environment2007，，7： | 1 |
| 6 | Long-term trend of visibility and its characterizations in the Pearl River Delta (PRD) region, China显示文摘 | Xuejiao Deng Xuexi Tie Dui Wu Xiuji Zhou Xueyan Bi Hanbo Tan Fei Li Chenglin Jiang | 2007 | Atmospheric Environment2007，，7： | 1 |
| 7 | Long-term trend of visibility and its characterizations in the Pearl River Delta (PRD) region, China显示文摘 | Xuejiao Deng Xuexi Tie Dui Wu Xiuji Zhou Xueyan Bi Hanbo Tan Fei Li Chenglin Jiang | 2007 | Atmospheric Environment2007，，7： | 1 |
| 8 | Secoiridoid glucosides and related compounds from Syringa reticulate and their antioxidant activities 显示文摘 | Bi Xueyan Li Wei Sasaki T | 2011 | Bioorganic & Medicinal Chemistry Letters2011，64，21： | 1 |
| 9 | An extremely low visibility event over the Guangzhou region: A case study显示文摘 | Dui Wu Xuexi Tie Chengcai Li Zhuming Ying Alexis Kai-Hon Lau Jian Huang Xuejiao Deng Xueyan Bi | 2005 | Atmospheric Environment2005，，35： | 1 |
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