<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Wehner, B.</style></author><author><style face="normal" font="default" size="100%">Wiedensohler, A.</style></author><author><style face="normal" font="default" size="100%">Tuch, T. M.</style></author><author><style face="normal" font="default" size="100%">ZJ Wu</style></author><author><style face="normal" font="default" size="100%">Hu, M.</style></author><author><style face="normal" font="default" size="100%">Slanina, J.</style></author><author><style face="normal" font="default" size="100%">C.S. Kiang</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Variability of the aerosol number size distribution in Beijing, China: New particle formation, dust storms, and high continental background</style></title><secondary-title><style face="normal" font="default" size="100%">Geophysical Research Letters</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Geophys. Res. Lett.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Geology</style></keyword><keyword><style  face="normal" font="default" size="100%">pm2.5</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Nov</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">22</style></number><volume><style face="normal" font="default" size="100%">31</style></volume><pages><style face="normal" font="default" size="100%">4</style></pages><isbn><style face="normal" font="default" size="100%">0094-8276</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">Continuous measurements of aerosol number size distributions from 3 nm to 10 mum have been first performed within the city area of Beijing since March 2004. Size distributions of the first 45 measurement days (March 05 to April 18, 2004) were investigated in terms of their high variability. Two dust storm events were observed indicated by high number concentrations greater than 1 mum and mass concentrations around 1 mg m(-3). Continental highly polluted air was observed during 12 days indicated by a number peak in the accumulation mode range, and submicrometer volume concentrations above 150 mum 3 cm(-3) were observed. Newly formed particles with more than 100,000 cm(-3) were observed on 25 days when the particle surface area concentration drops below a critical value (100-2000 mum 2 cm(-3)) because of clean air from the north. Measurements show only a slight growth (similar to1 nm h(-1)) of the particles indicating that they are produced within the city area of Beijing.</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><accession-num><style face="normal" font="default" size="100%">WOS:000225429100005</style></accession-num><notes><style face="normal" font="default" size="100%">ISI Document Delivery No.: 875ODTimes Cited: 76Cited Reference Count: 14Wehner, B Wiedensohler, A Tuch, TM Wu, ZJ Hu, M Slanina, J Kiang, CSWehner, Birgit/C-2650-2014; Wu, Zhijun/A-7041-201282447Amer geophysical unionWashington1944-8007</style></notes><custom7><style face="normal" font="default" size="100%">L22108</style></custom7><auth-address><style face="normal" font="default" size="100%">Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany. UFZ Helmholtz Ctr Environm Res, Dept Human Exposure &amp;amp; Epidemiol, Leipzig, Germany. Peking Univ, Coll Environm Sci, State Key Joint Lab Environm Simulat &amp;amp; Pollut Con, Beijing 100871, Peoples R China.Wehner, B (reprint author), Leibniz Inst Tropospher Res, Permoserstr 15, D-04318 Leipzig, Germany.birgit@tropos.de</style></auth-address></record></records></xml>