气候变化领域集成服务门户(CCPortal): Detection and characterization of birch pollen in the atmosphere using a multiwavelength Raman polarization lidar and Hirst-type pollen sampler in Finland

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DOI	10.5194/acp-19-14559-2019
	Detection and characterization of birch pollen in the atmosphere using a multiwavelength Raman polarization lidar and Hirst-type pollen sampler in Finland
	Bohlmann S.; Shang X.; Giannakaki E.; Filioglou M.; Saarto A.; Romakkaniemi S.; Komppula M.
发表日期	2019
ISSN	16807316
起始页码	14559
结束页码	14569
卷号	19 期号:23
英文摘要	We present the results of birch pollen characterization using lidar and in situ measurements based on a 11 d pollination period from 5 to 15 May 2016 at the European Aerosol Research Lidar Network (EARLINET) station in Vehmasmäki (Kuopio; 62ĝ44′ N, 27ĝ33′ E), Finland. The ground-based multiwavelength Raman polarization lidar PollyXT performed continuous measurements at this rural forest site and has been combined with a Hirst-type volumetric air sampler, which measured the pollen type and concentration at roof level (4 m). The period was separated into two parts due to different atmospheric conditions and detected pollen types. During the first period, high concentrations of birch pollen were measured with a maximum 2 h average pollen concentration of 3700 grains m-3. Other pollen types represented less than 3 % of the total pollen count. In observed pollen layers, the mean particle depolarization ratio at 532 nm was 10±6 % during the intense birch pollination period. Mean lidar ratios were found to be 45±7 and 55±16 sr at 355 and 532 nm, respectively. During the second period, birch pollen was still dominant, but a significant contribution of spruce pollen was observed as well. Spruce pollen grains are highly nonspherical, leading to a larger mean depolarization ratio of 26±7 % for the birch-spruce pollen mixture. Furthermore, higher lidar ratios were observed during this period with mean values of 60±3 and 62±10 sr at 355 and 532 nm, respectively. The presented study shows the potential of the particle depolarization ratio to track pollen grains in the atmosphere. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol composition; aerosol formation; detection method; lidar; pollen; pollination; Raman spectroscopy; satellite data; satellite imagery; Finland; Picea
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144002
作者单位	Finnish Meteorological Institute, Atmospheric Research, Centre of Eastern Finland, Kuopio, 70211, Finland; Department of Environmental Physics and Meteorology, University of Athens, Athens, 15784, Greece; Biodiversity Unit, University of Turku, Turku, 20014, Finland
推荐引用方式 GB/T 7714	Bohlmann S.,Shang X.,Giannakaki E.,et al. Detection and characterization of birch pollen in the atmosphere using a multiwavelength Raman polarization lidar and Hirst-type pollen sampler in Finland[J],2019,19(23).
APA	Bohlmann S..,Shang X..,Giannakaki E..,Filioglou M..,Saarto A..,...&Komppula M..(2019).Detection and characterization of birch pollen in the atmosphere using a multiwavelength Raman polarization lidar and Hirst-type pollen sampler in Finland.Atmospheric Chemistry and Physics,19(23).
MLA	Bohlmann S.,et al."Detection and characterization of birch pollen in the atmosphere using a multiwavelength Raman polarization lidar and Hirst-type pollen sampler in Finland".Atmospheric Chemistry and Physics 19.23(2019).