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000187194 0247_ $$2ISSN$$a1867-8548
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000187194 1001_ $$0P:(DE-Juel1)157625$$aHirsikko, A.$$b0$$eCorresponding Author$$ufzj
000187194 245__ $$aObserving wind, aerosol particles, cloud and precipitation: Finland's new ground-based remote-sensing network
000187194 260__ $$aKatlenburg-Lindau$$bCopernicus$$c2014
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000187194 520__ $$aThe Finnish Meteorological Institute, in collaboration with the University of Helsinki, has established a new ground-based remote-sensing network in Finland. The network consists of five topographically, ecologically and climatically different sites distributed from southern to northern Finland. The main goal of the network is to monitor air pollution and boundary layer properties in near real time, with a Doppler lidar and ceilometer at each site. In addition to these operational tasks, two sites are members of the Aerosols, Clouds and Trace gases Research InfraStructure Network (ACTRIS); a Ka band cloud radar at Sodankylä will provide cloud retrievals within CloudNet, and a multi-wavelength Raman lidar, PollyXT (POrtabLe Lidar sYstem eXTended), in Kuopio provides optical and microphysical aerosol properties through EARLINET (the European Aerosol Research Lidar Network). Three C-band weather radars are located in the Helsinki metropolitan area and are deployed for operational and research applications. We performed two inter-comparison campaigns to investigate the Doppler lidar performance, compare the backscatter signal and wind profiles, and to optimize the lidar sensitivity through adjusting the telescope focus length and data-integration time to ensure sufficient signal-to-noise ratio (SNR) in low-aerosol-content environments. In terms of statistical characterization, the wind-profile comparison showed good agreement between different lidars. Initially, there was a discrepancy in the SNR and attenuated backscatter coefficient profiles which arose from an incorrectly reported telescope focus setting from one instrument, together with the need to calibrate. After diagnosing the true telescope focus length, calculating a new attenuated backscatter coefficient profile with the new telescope function and taking into account calibration, the resulting attenuated backscatter profiles all showed good agreement with each other. It was thought that harsh Finnish winters could pose problems, but, due to the built-in heating systems, low ambient temperatures had no, or only a minor, impact on the lidar operation – including scanning-head motion. However, accumulation of snow and ice on the lens has been observed, which can lead to the formation of a water/ice layer thus attenuating the signal inconsistently. Thus, care must be taken to ensure continuous snow removal.
000187194 536__ $$0G:(DE-HGF)POF2-233$$a233 - Trace gas and aerosol processes in the troposphere (POF2-233)$$cPOF2-233$$fPOF II$$x0
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000187194 7001_ $$0P:(DE-HGF)0$$aO'Connor, E. J.$$b1
000187194 7001_ $$0P:(DE-HGF)0$$aKomppula, M.$$b2
000187194 7001_ $$0P:(DE-HGF)0$$aKorhonen, K.$$b3
000187194 7001_ $$0P:(DE-HGF)0$$aPfüller, A.$$b4
000187194 7001_ $$0P:(DE-HGF)0$$aGiannakaki, E.$$b5
000187194 7001_ $$0P:(DE-HGF)0$$aWood, C. R.$$b6
000187194 7001_ $$0P:(DE-HGF)0$$aBauer-Pfundstein, M.$$b7
000187194 7001_ $$0P:(DE-HGF)0$$aPoikonen, A.$$b8
000187194 7001_ $$0P:(DE-HGF)0$$aKarppinen, T.$$b9
000187194 7001_ $$0P:(DE-HGF)0$$aLonka, H.$$b10
000187194 7001_ $$0P:(DE-HGF)0$$aKurri, M.$$b11
000187194 7001_ $$0P:(DE-HGF)0$$aHeinonen, J.$$b12
000187194 7001_ $$0P:(DE-HGF)0$$aMoisseev, D.$$b13
000187194 7001_ $$0P:(DE-HGF)0$$aAsmi, E.$$b14
000187194 7001_ $$0P:(DE-HGF)0$$aAaltonen, V.$$b15
000187194 7001_ $$0P:(DE-HGF)0$$aNordbo, A.$$b16
000187194 7001_ $$0P:(DE-HGF)0$$aRodriguez, E.$$b17
000187194 7001_ $$0P:(DE-HGF)0$$aLihavainen, H.$$b18
000187194 7001_ $$0P:(DE-HGF)0$$aLaaksonen, A.$$b19
000187194 7001_ $$0P:(DE-HGF)0$$aLehtinen, K. E. J.$$b20
000187194 7001_ $$0P:(DE-HGF)0$$aLaurila, T.$$b21
000187194 7001_ $$0P:(DE-HGF)0$$aPetäjä, T.$$b22
000187194 7001_ $$0P:(DE-HGF)0$$aKulmala, M.$$b23
000187194 7001_ $$0P:(DE-HGF)0$$aViisanen, Y.$$b24
000187194 773__ $$0PERI:(DE-600)2505596-3$$a10.5194/amt-7-1351-2014$$gVol. 7, no. 5, p. 1351 - 1375$$n5$$p1351 - 1375$$tAtmospheric measurement techniques$$v7$$x1867-8548$$y2014
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