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空气中的湿度是引起天气变化的主要因素之一，测量和研究湿度变化是气象工作的主要任务之一，所以正确掌握检定方法，尽量减小误差是非常必要的。青海省气象部门五十余个台站和有关部门均开展湿度测量工作，因不同的测试条件将直接导致不同的测试结果，有时差别特别大，这将给计量检定的结果带来风险和损失。在检定过程中要时刻注意测试条件的变化，同时也要注意对测试设备的监控，一旦出现测试数据偏差，首先要排除测试设备的损坏和测试条件改变后而检测到的计量数据， 相似文献
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本介绍风向、风速传感器原理、安装及维护注意事项等。对MILOS500型自动站正常工作、维护等有较好的参考、实用价值。 相似文献
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1Introduction Tracemetalsarereleasedtotheatmosphereduring combustionoffossilfuelsandwood,aswellasemis sionsfromavarietyofprocessesactingoncrustalmin erals,includingvolcanism,erosionandsurfaceweath ering.Onaglobalscale,resuspendedsurfacedusts havemadeagreatcontributiontothetotalnaturale missionoftracemetalstotheatmosphere,withCr,Mn andVaccountingfor>50%andCu,Mo,Ni,Pb,Sb andZnaccountingfor>20%,whilevolcanicactivity probablygeneratedasmuchas20%atmosphericCd,Hg,As,Cr,Cu,Ni,PbandSb(Pacyna,19… 相似文献
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Nineteen trace metals in PM10 were measured by X-ray fluorescence spectroscopy （XRF） at three sites in Chongqing. The special and seasonal variations of trace metals in PM10 samples collected in the downtown were different from those in the background area of Jinyunshan. The source identification indicated that particulate materials were contributed mainly by two sources. 相似文献
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1Introduction Particleswithanaerodynamicdiameterof< 10μmarerecognizedasinhalabaleparticlesandhave beenfoundtobewidelyassociatedwithhealthprob lems(Chapmanetal.,1997).Theywouldalsoinflu enceclimateandvisibilitythroughanumberofimpor tantatmosphericprocesses(Horvath,1993). Rapiddevelopmentofurbanconstructionandrap idgrowthofpopulationhaveexacerbatedChongqing’s pollution.Althoughsulfurdioxidehasbeenreducedby morethan60%incontrasttothevaluein1991,the concentrationsofparticulatematterarestil… 相似文献
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