{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:19:49Z","timestamp":1760242789806,"version":"build-2065373602"},"reference-count":44,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2016,6,17]],"date-time":"2016-06-17T00:00:00Z","timestamp":1466121600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["2014QD02"],"award-info":[{"award-number":["2014QD02"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"name":"outstanding talent training project of Beijing","award":["2014000020124G0441"],"award-info":[{"award-number":["2014000020124G0441"]}]},{"name":"Open Fund of State Key Laboratory of Remote Sensing Science","award":["OFSLRSS201623"],"award-info":[{"award-number":["OFSLRSS201623"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41371492"],"award-info":[{"award-number":["41371492"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Aerosol particles can strongly affect both air quality and the radiation budget of the atmosphere. Above Beijing, the capital city of China, large amounts of aerosols within the atmospheric column have caused the deterioration of local air quality and have influenced radiative forcings at both the top and the bottom of the atmosphere (BOA and TOA). Observations of aerosol radiative forcing and its efficiency have been made using two sun-photometers in urban Beijing between 2013 and 2015, and have been analyzed alongside two air quality monitoring stations\u2019 data by dividing air quality conditions into unpolluted, moderately polluted, and heavily polluted days. Daily average PM2.5 concentrations varied greatly in urban Beijing (5.5\u2013485.0 \u00b5g\/m3) and more than one-third of the analyzed period is classified as being polluted according to the national ambient air quality standards of China. The heavily polluted days had the largest bottom of atmosphere (BOA) and top of atmosphere (TOA) radiative forcings, but the smallest radiative forcing efficiencies, while the unpolluted days showed the opposite characteristics. On heavily polluted days, the averaged BOA aerosol radiative forcing occasionally exceeded \u2212150 W\/m2, which represents a value about three-times greater than that for unpolluted days. BOA aerosol radiative forcing was around two-to-three times as large as TOA aerosol radiative forcing under various air quality conditions, although both were mostly negative, suggesting that aerosols had different magnitudes of cooling effects at both the surface and the top of the atmosphere. Unpolluted days had the largest average values of aerosol radiative forcing efficiencies at BOA (and TOA) levels, which exceeded \u2212190 W\/m2 (\u221270 W\/m2), compared with the lowest average values in heavily polluted days of around \u2212120 W\/m2 (\u221255 W\/m2). These results suggest that the high concentrations of particulate matter pollution in the urban Beijing area had a strong cooling effect at both BOA and TOA levels.<\/jats:p>","DOI":"10.3390\/rs8060510","type":"journal-article","created":{"date-parts":[[2016,6,17]],"date-time":"2016-06-17T10:09:24Z","timestamp":1466158164000},"page":"510","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Analysis of Aerosol Radiative Forcing over Beijing under Different Air Quality Conditions Using Ground-Based Sun-Photometers between 2013 and 2015"],"prefix":"10.3390","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2585-9984","authenticated-orcid":false,"given":"Wei","family":"Chen","sequence":"first","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"},{"name":"Beijing Key Lab of Spatial Information Integration and Its Applications, Peking University, Beijing 100871, China"},{"name":"State Key Laboratory of Remote Sensing Science, Beijing Normal University, Beijing 100875, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lei","family":"Yan","sequence":"additional","affiliation":[{"name":"Beijing Key Lab of Spatial Information Integration and Its Applications, Peking University, Beijing 100871, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nan","family":"Ding","sequence":"additional","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mengdie","family":"Xie","sequence":"additional","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ming","family":"Lu","sequence":"additional","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fan","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongxu","family":"Duan","sequence":"additional","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuo","family":"Zong","sequence":"additional","affiliation":[{"name":"School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,6,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2125","DOI":"10.5194\/acp-14-2125-2014","article-title":"Column aerosol optical properties and aerosol radiative forcing during a serious haze-fog month over north China plain in 2013 based on ground-based sunphotometer measurements","volume":"14","author":"Che","year":"2014","journal-title":"Atmos. Chem. Phys."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"5761","DOI":"10.5194\/acp-15-5761-2015","article-title":"Diurnal variations of aerosol optical properties in the north China plain and their influences on the estimates of direct aerosol radiative effect","volume":"15","author":"Kuang","year":"2015","journal-title":"Atmos. Chem. Phys."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1016\/j.atmosres.2006.05.006","article-title":"Aerosol climatology from ground-based measurements for the southern North Sea","volume":"84","author":"Behnert","year":"2007","journal-title":"Atmos. Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"7619","DOI":"10.5194\/acp-15-7619-2015","article-title":"Ground-based aerosol climatology of China: Aerosol optical depths from the China aerosol remote sensing network (CARSNET) 2002\u20132013","volume":"15","author":"Che","year":"2015","journal-title":"Atmos. Chem. Phys."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1043","DOI":"10.1007\/s11356-014-3415-5","article-title":"Aerosol optical properties under the condition of heavy haze over an urban site of Beijing, China","volume":"22","author":"Che","year":"2015","journal-title":"Environ. Sci. Pollut. R."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1007\/s00703-015-0367-3","article-title":"Analyses of aerosol optical properties and direct radiative forcing over urban and industrial regions in northeast China","volume":"127","author":"Che","year":"2015","journal-title":"Meteorol. Atmos. Phys."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"7431","DOI":"10.5194\/acp-12-7431-2012","article-title":"Comparison of Calipso aerosol optical depth retrievals to aeronet measurements, and a climatology for the LIDAR ratio of dust","volume":"12","author":"Schuster","year":"2012","journal-title":"Atmos. Chem. Phys."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"5129","DOI":"10.5194\/acp-12-5129-2012","article-title":"Shortwave radiative forcing and efficiency of key aerosol types using aeronet data","volume":"12","author":"Garcia","year":"2012","journal-title":"Atmos. Chem. Phys."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0034-4257(98)00031-5","article-title":"AERONET\u2014A federated instrument network and data archive for aerosol characterization","volume":"66","author":"Holben","year":"1998","journal-title":"Remote. Sens. Environ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"6992","DOI":"10.1002\/2015JD023360","article-title":"Comparison and evaluation of the modis collection 6 aerosol data in China","volume":"120","author":"Tao","year":"2015","journal-title":"J. Geophys. Res."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"7864","DOI":"10.1002\/jgrd.50600","article-title":"Validation and uncertainty estimates for modis collection 6 \u201cdeep blue\u201d aerosol data","volume":"118","author":"Sayer","year":"2013","journal-title":"J. Geophys. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"99","DOI":"10.4209\/aaqr.2013.05.0154","article-title":"Aerosol characteristics and radiative forcing during pre-monsoon and post-monsoon seasons in an urban environment","volume":"14","author":"Khan","year":"2014","journal-title":"Aerosol. Air. Qual. Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1016\/j.atmosenv.2015.08.040","article-title":"Diurnal, weekly and monthly spatial variations of air pollutants and air quality of Beijing","volume":"119","author":"Chen","year":"2015","journal-title":"Atmos. Environ."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1243","DOI":"10.3390\/atmos6081243","article-title":"Air quality of Beijing and impacts of the new ambient air quality standard","volume":"6","author":"Chen","year":"2015","journal-title":"Atmosphere"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"204","DOI":"10.1016\/j.atmosres.2015.07.003","article-title":"Temporal variability of the visibility, particulate matter mass concentration and aerosol optical properties over an urban site in northeast China","volume":"166","author":"Zhao","year":"2015","journal-title":"Atmos. Res."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"28","DOI":"10.3402\/tellusb.v57i1.16770","article-title":"Aerosol properties and their spatial and temporal variations over north China in spring 2001","volume":"57","author":"Xia","year":"2005","journal-title":"Tellus B"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1016\/j.apr.2015.07.004","article-title":"Urban air quality evaluations under two versions of the national ambient air quality standards of China","volume":"7","author":"Chen","year":"2016","journal-title":"Atmos. Pollut. Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"480","DOI":"10.1016\/j.atmosenv.2006.08.046","article-title":"Air quality during the 2008 Beijing Olympic Games","volume":"41","author":"Streets","year":"2007","journal-title":"Atmos. Environ."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"37","DOI":"10.3155\/1047-3289.59.1.37","article-title":"Modeling regional\/urban ozone and particulate matter in Beijing, China","volume":"59","author":"Fu","year":"2009","journal-title":"J. Air. Waste Manag."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"9884","DOI":"10.1002\/2014JD021757","article-title":"Investigating the aerosol optical and radiative characteristics of heavy haze episodes in Beijing during January of 2013","volume":"119","author":"Bi","year":"2014","journal-title":"J. Geophys. Res."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1868","DOI":"10.4209\/aaqr.2014.11.0306","article-title":"Temporal and spatial characteristics of ambient air quality in Beijing, China","volume":"15","author":"Zhou","year":"2015","journal-title":"Aerosol. Air. Qual. Res."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"7053","DOI":"10.5194\/acp-13-7053-2013","article-title":"Chemical characterization and source apportionment of PM2.5 in Beijing: Seasonal perspective","volume":"13","author":"Zhang","year":"2013","journal-title":"Atmos. Chem. Phys."},{"key":"ref_23","unstructured":"Distribution of Real Time Air Qulaity of China. Available online: http:\/\/113.108.142.147:20035\/emcpublish\/."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"975","DOI":"10.5194\/amt-4-975-2011","article-title":"Statistically optimized inversion algorithm for enhanced retrieval of aerosol properties from spectral multi-angle polarimetric satellite observations","volume":"4","author":"Dubovik","year":"2011","journal-title":"Atmos. Meas. Tech."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"13965","DOI":"10.1002\/2014JD022453","article-title":"MODIS collection 6 aerosol products: Comparison between aqua\u2019s e-deep blue, dark target, and \u201cmerged\u201d data sets, and usage recommendations","volume":"119","author":"Sayer","year":"2014","journal-title":"J. Geophys. Res."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1016\/j.jaerosci.2013.12.007","article-title":"The aerosol direct radiative forcing over the Beijing metropolitan area from 2004 to 2011","volume":"69","author":"Gong","year":"2014","journal-title":"J. Aerosol. Sci."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"20673","DOI":"10.1029\/2000JD900282","article-title":"A flexible inversion algorithm for retrieval of aerosol optical properties from sun and sky radiance measurements","volume":"105","author":"Dubovik","year":"2000","journal-title":"J. Geophys. Res."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"9791","DOI":"10.1029\/2000JD900040","article-title":"Accuracy assessments of aerosol optical properties retrieved from aerosol robotic network (AERONET) sun and sky radiance measurements","volume":"105","author":"Dubovik","year":"2000","journal-title":"J. Geophys. Res."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1016\/j.envint.2015.11.003","article-title":"Annual and diurnal variations of gaseous and particulate pollutants in 31 provincial capital cities based on in situ air quality monitoring data from China national environmental monitoring center","volume":"86","author":"Zhao","year":"2016","journal-title":"Environ. Int."},{"key":"ref_30","unstructured":"Ministry of Environmental Protection Determination of Atmospheric Articles PM10 and PM2.5 in Ambient Air by Gravimetric Method, Available online: http:\/\/english.mep.gov.cn\/standards_reports\/standards\/Air_Environment\/air_method\/201111\/t20111101_219390.htm."},{"key":"ref_31","unstructured":"Ministry of Environmental Protection Specifications and Test Procedures for Ambient Air Quality Continuous Automated Monitoring System for PM10 and PM2.5, Available online: http:\/\/english.mep.gov.cn\/standards_reports\/standards\/Air_Environment\/air_method\/201308\/t20130816_257556.htm."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1007\/s11434-014-0607-9","article-title":"Diurnal, seasonal, and spatial variation of PM2.5 in Beijing","volume":"60","author":"Li","year":"2015","journal-title":"Sci. Bull."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1016\/j.atmosres.2016.02.003","article-title":"Concentrations and chemical compositions of fine particles (PM2.5) during haze and non-haze days in Beijing","volume":"174\u2013175","author":"Zhang","year":"2016","journal-title":"Atmos. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1016\/j.apr.2015.09.008","article-title":"Characteristics and sources of PM in seasonal perspective\u2014A case study from one year continuously sampling in Beijing","volume":"7","author":"Shen","year":"2016","journal-title":"Atmos. Pollut. Res."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"66","DOI":"10.1016\/j.atmosenv.2015.05.043","article-title":"Long term characterization of aerosol optical properties: Implications for radiative forcing over the desert region of Jodhpur, India","volume":"114","author":"Bhaskar","year":"2015","journal-title":"Atmos. Environ."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"994","DOI":"10.1016\/j.scitotenv.2016.01.191","article-title":"Quantifying enhancement in aerosol radiative forcing during \u2018extreme aerosol days\u2019 in summer at Delhi national capital region, India","volume":"550","author":"Kumar","year":"2016","journal-title":"Sci Total. Environ."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.atmosenv.2016.04.044","article-title":"Influence of the vertical absorption profile of mixed Asian dust plumes on aerosol direct radiative forcing over East Asia","volume":"138","author":"Noh","year":"2016","journal-title":"Atmos. Environ."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.atmosres.2015.01.021","article-title":"Column-integrated aerosol optical properties and direct radiative forcing based on sun photometer measurements at a semi-arid rural site in northeast China","volume":"157","author":"Wu","year":"2015","journal-title":"Atmos. Res."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"216","DOI":"10.1016\/j.rse.2013.12.021","article-title":"Changes in aerosol optical properties due to dust storms in the middle east and southwest Asia","volume":"143","author":"Alam","year":"2014","journal-title":"Remote. Sens. Environ."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"773","DOI":"10.1016\/j.atmosres.2011.05.007","article-title":"Aerosol optical properties and radiative forcing over mega-city Karachi","volume":"101","author":"Alam","year":"2011","journal-title":"Atmos. Res."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1016\/j.atmosenv.2011.12.027","article-title":"Aerosol optical and radiative properties during summer and winter seasons over Lahore and Karachi","volume":"50","author":"Alam","year":"2012","journal-title":"Atmos. Environ."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1016\/j.cities.2015.08.012","article-title":"The first official city ranking by air quality in china\u2014A review and analysis","volume":"51","author":"Sheng","year":"2016","journal-title":"Cities"},{"key":"ref_43","unstructured":"Ministry of Environmental Protection Ambient Air Quality Standards 2012, Available online: https:\/\/www3.epa.gov\/ttn\/naaqs\/criteria.html."},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Xia, X., Chen, H., Goloub, P., Zhang, W., Chatenet, B., and Wang, P. (2007). A compilation of aerosol optical properties and calculation of direct radiative forcing over an urban region in northern China. J. Geophys. Res., 112.","DOI":"10.1029\/2006JD008119"}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/8\/6\/510\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:25:39Z","timestamp":1760210739000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/8\/6\/510"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,6,17]]},"references-count":44,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2016,6]]}},"alternative-id":["rs8060510"],"URL":"https:\/\/doi.org\/10.3390\/rs8060510","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2016,6,17]]}}}