Anzahl- und Massenflüsse von Aerosolpartikeln über einer Stadt, erfasst mit hoher Größenauflösung

以高分辨率记录城市上空气溶胶颗粒的数量和质量流量

• 批准号: 122758571
• 负责人: Professor Dr. Otto Klemm
• 金额: --
• 依托单位: Institut für Landschaftsökologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/122758571?language=en
• 关键词: Anzahl; und; Massenfl; sse; von

The scope of this proposal is to quantify aerosol particle number and mass fluxes over an urban canopy. We plan to address a scientific field that is still widely open. Recent development of instrumental techniques now offers the chance to study these fluxes directly, employing the eddy covariance method. Urbanized areas are both sources and sinks for particles. The source characteristic applies mainly to the particle number, which is a relevant parameter for future toxicological considerations concerning nano-sized aerosol particles. The sink characteristic rather applies to the mass transport, which is important for present studies (and present legislation), for the study of source apportionment of PM2.5 and PM10, and for implementation of particle transport to mesoscale transport models. Presently, there is little knowledge about the exchange processes over the cities and their temporal and spatial characteristics. This study aims to produce a large data basis to produce understanding of these fluxes as function of atmospheric conditions (i.e., stability), land use (emission factors), time of day, week, and year, and, mostly important, of aerosol size. Only through a detailed size segregation of the fluxes we can develop understanding of the aerosol dynamical processes contributing to the fluxes. One of the important issues to be studied is the role of nucleation processes during atmospheric number and mass transport of particles.

这项建议的范围是量化的气溶胶粒子数量和质量通量的城市冠层。我们计划解决一个仍然广泛开放的科学领域。最近发展的仪器技术，现在提供了机会，直接研究这些通量，采用涡度相关方法。城市化地区既是颗粒物的源，也是颗粒物的汇。源特性主要适用于颗粒数，这是未来考虑纳米尺寸气溶胶颗粒的毒理学的相关参数。汇的特性，而适用于质量传输，这是很重要的，目前的研究（和目前的立法），为研究PM2.5和PM10的源解析，并实施颗粒物传输到中尺度传输模式。目前，人们对城市上空的交换过程及其时空特征了解甚少。这项研究的目的是产生一个大的数据基础，以了解这些通量作为大气条件的函数（即，稳定性），土地利用（排放因子），一天中的时间，一周，一年，最重要的是，气溶胶的大小。只有通过详细的大小分离的通量，我们可以发展的气溶胶动力学过程的理解，有助于通量。核化过程在大气粒子数和质量输运过程中的作用是有待研究的重要问题之一。

项目成果

One-year measurement of size-resolved particle fluxes in an urban area

城市地区尺寸分辨颗粒通量的一年测量

• DOI: 10.3402/tellusb.v67.25531
• 发表时间: 2015
• 期刊: Tellus B: Chemical and Physical Meteorology
• 作者: Deventer;El-Madany;Griessbaum
• 通讯作者: Griessbaum

Size-resolved flux measurement of sub-micrometer particles over an urban area

• DOI: 10.1127/0941-2948/2013/0441
• 发表时间: 2013-12-01
• 期刊: METEOROLOGISCHE ZEITSCHRIFT
• 影响因子: 1.2
• 作者: Deventer, Malte Julian;Griessbaum, Frank;Klemm, Otto
• 通讯作者: Klemm, Otto