A5051882063- Atmospheric chemistry and aerosols
- Climate variability and models
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Complex Systems and Time Series Analysis
- Meteorological Phenomena and Simulations
- Ecosystem dynamics and resilience
- Cryospheric studies and observations
- Hydrology and Drought Analysis
- Arctic and Antarctic ice dynamics
- Energy Load and Power Forecasting
- Air Quality Monitoring and Forecasting
- Urban Heat Island Mitigation
- Vehicle emissions and performance
- Oceanographic and Atmospheric Processes
- Sustainability and Ecological Systems Analysis
- Plant Water Relations and Carbon Dynamics
- Environmental Changes in China
- Icing and De-icing Technologies
- Financial Risk and Volatility Modeling
- Remote Sensing and Land Use
- Wind and Air Flow Studies
- Climate change impacts on agriculture
China Meteorological Administration
2013-2024
North China Electric Power University
2024
China Electric Power Research Institute
2024
Hebei Meteorological Bureau
2024
Nanjing University of Information Science and Technology
2024
Yangzhou University
2024
Guangdong University of Technology
2024
Northwest Normal University
2024
Anhui University of Science and Technology
2023
Beijing Normal University
2023
Abstract. North China Plain (NCP) is one of the most densely populated regions in and has experienced enormous economic growth past decades. Its regional trace gas pollution also become top environmental concerns China. Measurements surface gases, including O3, NOx, SO2 CO were carried out within HaChi (Haze China) project at Wuqing Meteorology Station, located between 2 mega-cities (Beijing Tianjin) NCP, from 9 July 2009 to 21 January 2010. Detailed statistical analyses made order provide...
Abstract. Information about the long-term trends of surface and tropospheric ozone is important for assessing impact on human health, vegetation, climate. Long-term measurements from East Asia, especially China's eastern provinces, are urgently needed to evaluate potential changes over this economically rapid developing region. In paper, data Linan Regional Background Station in China analyzed results at station presented. Surface were collected during 6 periods between August 1991 July...
Abstract. Continuous measurements of atmospheric ammonia (NH3) were conducted using Ogawa passive samplers from February 2008 to July 2010 at an urban site and January 2007 a rural in Beijing, China. NH4+ fine particles was also collected the during 2008–2009. The field comparison between active analyzer for NH3 assures quality accuracy measurements. concentrations ranged 0.7 85.1 ppb, with annual average 18.5 ± 13.8 23.5 18.0 ppb 2009, respectively. lower than those site, varied 0.8 42.9...
Abstract. Ground-based measurements of scattered sunlight by the Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) have been carried out at an urban site (39.95° N, 116.32° E) in Beijing megacity since 6 August 2008. In this study, we retrieved tropospheric NO2 vertical column densities (VCDs) over from these MAX-DOAS observations 2008 to September 2011. Over period, daytime (08:00–17:00 Time (BJT, which equals UTC + 8)) mean VCDs varied 0.5 13.3 with average 3.6 during...
Abstract. Atmospheric aerosols constitute one of the largest sources uncertainty in estimation radiative forcing for climate. From April 2003 to January 2005, situ measurements aerosol optical properties were conducted at a rural site Northern China, Shangdianzi Global Atmosphere Watch (GAW) regional station (SDZ), about 150 km from Beijing. Mean values (standard deviation, S.D.) scattering and absorption coefficients entire period are 174.6 Mm−1 (189.1 Mm-1) 17.5 (13.4 Mm-1), respectively....
Abstract. The largest uncertainty in the estimation of climate forcing stems from atmospheric aerosols. In early spring and summer 2009, two periods in-situ measurements on aerosol physical chemical properties were conducted within HaChi (Haze China) project at Wuqing, a town between Beijing Tianjin North China Plain (NCP). Aerosol optical properties, including scattering coefficient (σsp), hemispheric back (σbsp), absorption (σap), as well single albedo (ω), are presented. diurnal seasonal...
Abstract. We investigated aerosol hygroscopic growth property and its influence on scattering coefficient using M9003 nephelometers in coupling with humidity controlled inlet system at a rural site near Beijing mega-city from 24 April to 15 May 2006. Inlet relative was an increasing range of 40%–90% while factor coefficient, f(RH=80%) as ratio RH=80% "dry" (RH<40%) varied 1.07–2.35 during the measurement. Further analysis indicated that under dust episode, measured is 1.2±0.02, estimated...
Abstract. Visibility degradation is a pervasive and urgent environmental problem in China. The occurrence of low visibility events frequent the North China Plain, where aerosol loading quite high aerosols are strongly hygroscopic. A parameterization light extinction (Kex) for visibilities on hazy days proposed this paper, based visibility, relative humidity (RH), hygroscopic growth factors particle number size distributions measured during Haze (HaChi) Project. Observational results show...
Abstract. Size-resolved and bulk activation properties of aerosols were measured at a regional/suburban site in the North China Plain (NCP), which is occasionally heavily polluted by anthropogenic aerosol particles gases. A Cloud Condensation Nuclei (CCN) closure study conducted with CCN number concentration (NCCN) calculated based on size distribution size-resolved properties. The observed (NCCN-obs) are higher than those other locations China, average NCCN-obs roughly 2000, 3000, 6000, 10...
Abstract. Measurements of ozone and its precursors conducted within the HaChi (Haze in China) project summer 2009 were analyzed to characterize volatile organic compounds (VOCs) their effects on photochemical production at a suburban site North China Plain (NCP). Ozone episodes, during which running 8-h average concentrations exceeding 80 ppbv lasted for more than 4 h, occurred about two thirds observational days 5-week field campaign. This suggests continuous exposure risks this region...
Abstract. In this paper, the mixing state of light absorbing carbonaceous (LAC) was investigated with a two-parameter aerosol optical model and in situ measurements at regional site North China Plain (NCP). A closure study between hemispheric backscattering fraction (HBF) measured by an integrating nephelometer that calculated modified Mie conducted. new method proposed to retrieve ratio externally mixed LAC mass total (rext-LAC) based on assumption ambient particles were consisted pure...
Abstract. The relative humidity (RH) dependence of aerosol light scattering is an essential parameter for accurate estimation the direct radiative forcing induced by particles. Because insufficient information on hygroscopicity in climate models, a more detailed parameterization hygroscopic growth factors and resulting optical properties with respect to location, time, sources, chemistry meteorology are urgently required. In this paper, retrieval method calculate parameter, κ, proposed based...
Abstract Correlations of the urban heat island intensity (UHII) and key surface variables with short-duration intense rainfall (SDIR) events are examined for Beijing areas by applying hourly data a high-density automatic weather station (AWS) network. Higher frequencies (amounts) SDIR found in or near central area, most begin to appear late evening nighttime, but tend end night early morning. UHII frequency (amount) all highly significant more than 3 h ahead beginning events. Although at...
Abstract. Measurements of trace gaseous pollutants were taken at the Shangdianzi site, a WMO Global Atmosphere Watch (GAW) background station in Northern China. The results are presented for period from September 2003 to December 2006. Seasonal and diurnal variations O3, NOx, SO2, CO concentration characterized possible causes them discussed. observed levels gases comparable those some other sites polluted regions inside outside It was shown that seasonal variation O3 can change slightly...
Abstract In this study, the variability of aridity over a semiarid zone in Northern China from 1961 to 2013 and its association with northernmost margin East Asian summer monsoon (EASM) intensity were investigated using composite analysis, correlative unrotated rotated empirical orthogonal function analyses. The results indicate that nonsignificant drying trend (0.03/10 years) occurs entire eastern zone, accompanied by southward retreat EASM (0.24°/10 years), (0.11/10 (0.28°/10 are most...
With the rapid development of offshore wind farms, construction deep sea farms has increasingly significant impacts on safety maritime navigation. This paper conducts a cluster analysis ship trajectories based AIS data to analyze characteristics traffic flow in waters near Shanghai farm. A fuzzy hierarchical method is proposed. Combined with layout and navigational environment, risk assessment model for farm navigation established. quantifies factors that affect due evaluates risks...
Abstract. A phenomenon of frequent noontime SO2 concentration peaks was discovered in a detailed analysis the concentrations North China Plain (NCP). The possible causes and their contributions are analyzed. impacts such on sulphur cycle were studied implications for atmospheric chemistry, cloud physics, climate discussed. Different from more common diurnal patterns with high nighttime concentrations, NCP witnessed frequencies peaks, an occurrence frequency 50 to 72% at four stations. Down...
Based on a monthly drought index, the Standardized Precipitation Index (SPI), we investigate multifractality of areas in seven major regions China from 1961 to 2012 using multifractal detrended fluctuation analysis. The results show that is evident time series for all regions, but its strength varies between areas. From numerical results, further examine stationarity and persistence characteristics variance big small fluctuations are also analyzed. spectra used distinguish features...
Abstract. In the past decades, regional air pollution characterized by photochemical smog and grey haze-fog has become a severe environmental problem in China. To investigate this, field measurement campaign was performed Huabei region, located between 32–42° N latitude eastern China, during period 2 April–16 May 2006 as part of project "Influence Pollution on Aerosols Cloud Microphysics North China" (IPAC-NC). It appeared that strong emissions from urban industrial centers tend to...
At present, high-resolution drought indices are scarce, and this problem has restricted the development of refined analysis to some extent. This study explored possibility calculating standardized precipitation index (SPI) with short-term sequences in China, based on data from 2416 observation stations covering time period 1961 2019. The result shows that it is feasible for short-sequence calculate SPI index, spatial interpolation distribution parameters long-sequence station. Error denoted...
Abstract As one of the major components plant cell walls, cellulose is crucial for growth and development. Cellulose synthesized by synthase (CesA) complexes (CSCs), which are trafficked delivered from Golgi apparatus to plasma membrane. How CesAs released remains largely unclear. In this study, we observed that STELLO (STL) family proteins localized at a group small CesA-containing compartments called Small CesA (SmaCCs) or microtubule-associated (MASCs). The STL-labeled SmaCCs/MASCs were...
An hourly-resolution dataset from observations at the automatic weather stations (AWSs) is developed and applied to study characteristics of weakening surface wind in urban areas Beijing City 2008–2017. The "Urban Stilling Island (USI)" defined quantified depict speed (WS) differences between rural regions. (rural) sites are represented by 45 (6) within (outside) 6th Ring Road (RR). results demonstrate remarkable smaller annual seasonal average WS values than areas, indicating significant...