48754
2018
2018
eng
23
70
article
Routledge, Taylor & Francis Group
Abingdon
1
2018-12-05
2018-12-05
--
Microphysical properties and radiative impact of an intense biomass burning aerosol event measured over Ny-angstrom lesund, Spitsbergen in July 2015
In this work, an evaluation of an intense biomass burning event observed over Ny-angstrom lesund (Spitsbergen, European Arctic) in July 2015 is presented. Data from the multi-wavelengths Raman-lidar KARL, a sun photometer and radiosonde measurements are used to derive some microphysical properties of the biomass burning aerosol as size distribution, refractive index and single scattering albedo at different relative humidities. Predominantly particles in the accumulation mode have been found with a bi-modal distribution and dominance of the smaller mode. Above 80% relative humidity, hygroscopic growth in terms of an increase of particle diameter and a slight decrease of the index of refraction (real and imaginary part) has been found. Values of the single scattering albedo around 0.9 both at 355nm and 532nm indicate some absorption by the aerosol. Values of the lidar ratio are around 26sr for 355nm and around 50sr for 532nm, almost independent of the relative humidity. Further, data from the photometer and surface radiation values from the local baseline surface radiation network (BSRN) have been applied to derive the radiative impact of the biomass burning event purely from observational data by comparison with a clear background day. We found a strong cooling for the visible radiation and a slight warming in the infra-red. The net aerosol forcing, derived by comparison with a clear background day purely from observational data, obtained a value of -95 W/m(2) per unit AOD500.
Tellus - Series B, Chemical and Physical Meteorology
10.1080/16000889.2018.1539618
1600-0889
wos:2018
1445379
WOS:000452782300001
Ritter, C (reprint author), Alfred Wegener Inst, Helmholtz Ctr Polar & Marine Res, Telegrafenberg A45, D-14473 Potsdam, Germany., christoph.ritter@awi.de
2021-01-04T11:14:15+00:00
sword
importub
filename=package.tar
21f7b196af58cc44c0b20cbfae60b31c
Ritter, Christoph
SFB/TR 172 “ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)3 in sub-project E02 funded by the DFG (Deutsche Forschungsgemeinschaft); Spanish Government by means of POLARMOON project (ref CTM2015-66742-R) and IJCI-2014-19477 grant, and EU-H2020 under grant agreement Nr. 654109 [ACTRIS 2]; European Union (EU) Seventh Framework Program for research, technological development and demonstration under grant agreement No. 289923 - ITaRS
CC-BY-NC - Namensnennung, nicht kommerziell 4.0 International
Christoph Ritter
María Ángeles Burgos
Christine Böckmann
David Mateos
Justyna Lisok
Krzysztof M. Markowicz
Beatrice Moroni
David Cappelletti
Roberto Udisti
Marion Maturilli
Roland Neuber
eng
uncontrolled
aerosol
eng
uncontrolled
lidar
eng
uncontrolled
retrieval of aerosol properties
eng
uncontrolled
radiative forcing
eng
uncontrolled
Arctic aerosol
Geowissenschaften
Referiert
Institut für Umweltwissenschaften und Geographie
Institut für Erd- und Umweltwissenschaften
Import
Gold Open-Access
DOAJ gelistet
22574
1998
1998
eng
article
1
--
--
--
Analysis of multi-wavelength lidar data by inversion with mollifier method
allegro:1991-2014
10084720
Pure and Applied Optics. - 7 (1998), S. 827 - 836
Christine Böckmann
Jens Biele
Roland Neuber
Institut für Mathematik
24079
1997
1997
eng
article
1
--
--
--
Retrieval of Multimodal aerosol size distribution by Inversion of Multiwavelength data
0-8194-2525-7
allegro:1991-2014
10084741
Lidar Atmospheric Monitoring : 16 - 18 June 1997, Munich, FRG / Hrsg.: Jean-Pierre Wolf. - Bellingham, Wash. : SPIE, 1997. - S. 27 - 38. - (Proceedings / SPIE : 3104). - ISBN 0-8194-2525-7
Christine Böckmann
Jens Biele
Roland Neuber
Jenny Niebsch
Institut für Mathematik
35885
2012
2012
eng
56
66
11
3
52
article
Elsevier
Oxford
1
--
--
--
Remote sensing and in-situ measurements of tropospheric aerosol, a PAMARCMiP case study
In this work, a closure experiment for tropospheric aerosol is presented. Aerosol size distributions and single scattering albedo from remote sensing data are compared to those measured in-situ. An aerosol pollution event on 4 April 2009 was observed by ground based and airborne lidar and photometer in and around Ny-Alesund, Spitsbergen, as well as by DMPS, nephelometer and particle soot absorption photometer at the nearby Zeppelin Mountain Research Station.
The presented measurements were conducted in an area of 40 x 20 km around Ny-Alesund as part of the 2009 Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMiP). Aerosol mainly in the accumulation mode was found in the lower troposphere, however, enhanced backscattering was observed up to the tropopause altitude. A comparison of meteorological data available at different locations reveals a stable multi-layer-structure of the lower troposphere. It is followed by the retrieval of optical and microphysical aerosol parameters. Extinction values have been derived using two different methods, and it was found that extinction (especially in the UV) derived from Raman lidar data significantly surpasses the extinction derived from photometer AOD profiles. Airborne lidar data shows volume depolarization values to be less than 2.5% between 500 m and 2.5 km altitude, hence, particles in this range can be assumed to be of spherical shape. In-situ particle number concentrations measured at the Zeppelin Mountain Research Station at 474 m altitude peak at about 0.18 mu m diameter, which was also found for the microphysical inversion calculations performed at 850 m and 1500 m altitude. Number concentrations depend on the assumed extinction values, and slightly decrease with altitude as well as the effective particle diameter. A low imaginary part in the derived refractive index suggests weakly absorbing aerosols, which is confirmed by low black carbon concentrations, measured at the Zeppelin Mountain as well as on board the Polar 5 aircraft.
Atmospheric environment : air pollution ; emissions, transport and dispersion, transformation, deposition effects, micrometeorology, urban atmosphere, global atmosphere
10.1016/j.atmosenv.2011.11.027
1352-2310
wos:2011-2013
WOS:000303098500006
Hoffmann, A (reprint author), Alfred Wegener Inst Polar & Marine Res, Telegrafenberg A45, Potsdam, Germany., anne.hoffmann@awi.de; lukas.osterloh@googlemail.com; robert.stone@noaa.gov; astrid.lampert@tu-bs.de; peter.tunved@itm.su.se; shao-meng.li@ec.gc.ca; elefther@ipta.demokritos.gr; andreas.herber@awi.de
Anne Hoffmann
Lukas Osterloh
Robert Stone
Astrid Lampert
Christoph Ritter
Maria Stock
Peter Tunved
Tabea Hennig
Christine Böckmann
Shao-Meng Li
Kostas Eleftheriadis
Marion Maturilli
Thomas Orgis
Andreas Herber
Roland Neuber
Klaus Dethloff
eng
uncontrolled
Arctic
eng
uncontrolled
Aerosols
eng
uncontrolled
Lidar
eng
uncontrolled
Arctic haze
Institut für Mathematik
Referiert