Remote sensing for aerosol particles in marine atmosphere using scattering of optical vortex

2017 ◽  
Author(s):  
Qingqing Huang ◽  
Jiangting Li ◽  
Xu Yan ◽  
Mingjian Cheng ◽  
Lixin Guo
Keyword(s):  
Remote Sensing ◽  
Aerosol Particles ◽  
Optical Vortex ◽  
Marine Atmosphere

scholarly journals MOPSMAP v0.9: A versatile tool for modeling of aerosol optical properties

2018 ◽  
Author(s):  
Josef Gasteiger ◽  
Matthias Wiegner
Keyword(s):  
Remote Sensing ◽  
Optical Properties ◽  
Aerosol Particles ◽  
Particle Orientation ◽  
Spherical Particles ◽  
Refractive Indices ◽  
Hygroscopic Growth ◽  
Web Interface ◽  
Optical Modeling ◽  
Wide Range

Abstract. The spatiotemporal distribution and characterization of aerosol particles are usually determined by remote sensing and optical in-situ measurements. These measurements are indirect with respect to microphysical properties and thus inversion techniques are required to determine the aerosol microphysics. Scattering theory provides the link between microphysical and optical properties; it is not only needed for such inversions but also for radiative budget calculations and climate modeling. However, optical modeling can be very time consuming, in particular if non-spherical particles or complex ensembles are involved. In this paper we present the MOPSMAP package (modeled optical properties of ensembles of aerosol particles) which is computationally fast for optical modeling even in case of complex aerosols. The package consists of a data set of pre-calculated optical properties of single aerosol particles, a Fortran program to calculate the properties of user-defined aerosol ensembles, and a user-friendly web interface for online calculations. Spheres, spheroids, and a small set of irregular particle shapes are considered over a wide range of sizes and refractive indices. MOPSMAP provides the fundamental optical properties assuming random particle orientation, including the scattering matrix for the selected wavelengths. Moreover, the output includes tables of frequently used properties such as the single scattering albedo, the asymmetry parameter or the lidar ratio. To demonstrate the wide range of possible MOPSMAP applications a selection of examples is presented, e.g., dealing with hygroscopic growth, mixtures of absorbing and non-absorbing particles, the relevance of the size equivalence in case of non-spherical particles, and the variability of volcanic ash microphysics. The web interface is designed to be intuitive for expert and non-expert users. To support users a large set of default settings is available, e.g., several wavelength-dependent refractive indices, climatologically representative size distributions, and a parameterization of hygroscopic growth. Calculations are possible for single wavelengths or user-defined sets (e.g., of specific remote sensing application). For expert users more options for the microphysics are available. Plots for immediate visualization of the results are shown. The complete output can be downloaded for further applications. All input parameters and results are stored in the user’s personal folder so that calculations can easily be reproduced. The MOPSMAP package is available on request for offline calculations, e.g., when large numbers of different runs for sensitivity studies shall be made.

scholarly journals The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) – Part 1: Model description and evaluation

2009 ◽  
Vol 9 (8) ◽  
pp. 2843-2861 ◽  
Author(s):  
S. R. Freitas ◽  
K. M. Longo ◽  
M. A. F. Silva Dias ◽  
R. Chatfield ◽  
P. Silva Dias ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Carbon Monoxide ◽  
Biomass Burning ◽  
Transport Model ◽  
Aerosol Particles ◽  
Atmospheric Modeling ◽  
Tracer Transport ◽  
Regional Atmospheric Modeling System ◽  
Biomass Burning Aerosol ◽  
Regional Atmospheric Modeling

Abstract. We introduce the Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS). CATT-BRAMS is an on-line transport model fully consistent with the simulated atmospheric dynamics. Emission sources from biomass burning and urban-industrial-vehicular activities for trace gases and from biomass burning aerosol particles are obtained from several published datasets and remote sensing information. The tracer and aerosol mass concentration prognostics include the effects of sub-grid scale turbulence in the planetary boundary layer, convective transport by shallow and deep moist convection, wet and dry deposition, and plume rise associated with vegetation fires in addition to the grid scale transport. The radiation parameterization takes into account the interaction between the simulated biomass burning aerosol particles and short and long wave radiation. The atmospheric model BRAMS is based on the Regional Atmospheric Modeling System (RAMS), with several improvements associated with cumulus convection representation, soil moisture initialization and surface scheme tuned for the tropics, among others. In this paper the CATT-BRAMS model is used to simulate carbon monoxide and particulate material (PM2.5) surface fluxes and atmospheric transport during the 2002 LBA field campaigns, conducted during the transition from the dry to wet season in the southwest Amazon Basin. Model evaluation is addressed with comparisons between model results and near surface, radiosondes and airborne measurements performed during the field campaign, as well as remote sensing derived products. We show the matching of emissions strengths to observed carbon monoxide in the LBA campaign. A relatively good comparison to the MOPITT data, in spite of the fact that MOPITT a priori assumptions imply several difficulties, is also obtained.

scholarly journals Characterization and longitudinal study of aerosol particles using a synergy of lidar techniques and passive remote sensing methods in the Mediterranean basin

2020 ◽  
Author(s):  
Ουρανία Σουπιωνά
Keyword(s):  
Remote Sensing ◽  
Longitudinal Study ◽  
Mediterranean Basin ◽  
Aerosol Particles ◽  
Light Detection And Ranging ◽  
Light Detection ◽  
Passive Remote Sensing ◽  
The Mediterranean ◽  
Remote Sensing Methods ◽  
The Mediterranean Basin

H παρούσα Διδακτορική Διατριβή έχει ως αντικείμενο τη μελέτη των τροποσφαιρικών αερολυμάτων με τη χρήση επίγειων και δορυφορικών τεχνικών, για την ανάκτηση των οπτικών ιδιοτήτων των αιωρούμενων σωματιδίων και την στατιστική ανάλυσή τους. Παράλληλα, εφαρμόζονται μαθηματικοί αλγόριθμοι για την ανάκτηση των μικροφυσικών τους ιδιοτήτων, καθώς και γίνεται χρήση προγνωστικών μοντέλων για ανάκτηση επιπλέον πληροφοριών, όπως ο προσδιορισμός της πηγής προέλευσης των αιωρούμενων σωματιδίων, αλλά και η επίδρασή τους στο ατμοσφαιρικό ενεργειακό ισοζύγιο. Στο πρώτο κεφάλαιο (Κεφάλαιο 1) περιλαμβάνεται το θεωρητικό υπόβαθρο των ατμοσφαιρικών αερολυμάτων, ο ρόλος τους στην ατμοσφαιρική Φυσική, καθώς και οι διάφοροι τύποι αερολυμάτων, δίνοντας τη συνολική εικόνα του πεδίου μελέτης. Στο Κεφάλαιο 2 αναφέρονται οι θεμελιώδεις πτυχές της ατμοσφαιρικής Φυσικής και της Οπτικής, με έμφαση στους μηχανισμούς αλληλεπίδρασης του φωτός με τα ατμοσφαιρικά στοιχεία (αερολύματα και μόρια). Οι τεχνικές τηλεπισκόπησης αερολυμάτων που έχουν χρησιμοποιηθεί ευρέως σε αυτή τη διατριβή παρουσιάζονται στο Κεφάλαιο 3, μαζί με λοιπά διαθέσιμα όργανα που χρησιμοποιήθηκαν για τη λήψη δεδομένων των προς εξαγωγή αποτελεσμάτων. Συγκεκριμένα παρουσιάζεται η τεχνική light detection and ranging (lidar), καθώς και τα διάφορα στάδια επεξεργασίας των σημάτων lidar. Τα ατμοσφαιρικά προγνωστικά μοντέλα αλλά και εργαλεία που αξιοποιούν δορυφορικές μετρήσεις και χρησιμοποιήθηκαν για την ενίσχυση των αποτελεσμάτων μας παρουσιάζονται εν συντομία στο Κεφάλαιο 4. Η περιεκτική ανάλυση των αποτελεσμάτων παρουσιάζεται στο Κεφάλαιο 5, ενώ τα συμπεράσματα παρατίθενται στο Κεφάλαιο 6, που αποτελεί το τελευταίο κεφάλαιο αυτής της Διατριβής.

scholarly journals The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) – Part 1: Model description and evaluation

2007 ◽  
Vol 7 (3) ◽  
pp. 8525-8569 ◽  
Author(s):  
S. R. Freitas ◽  
K. M. Longo ◽  
M. A. F. Silva Dias ◽  
R. Chatfield ◽  
P. Silva Dias ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Carbon Monoxide ◽  
Transport Model ◽  
Aerosol Particles ◽  
Atmospheric Modeling ◽  
Wave Radiation ◽  
Model Description ◽  
Tracer Transport ◽  
Regional Atmospheric Modeling System ◽  
Regional Atmospheric Modeling

Abstract. We introduce the Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS). CATT-BRAMS is an on-line transport model fully consistent with the simulated atmospheric dynamics. Emission sources from biomass burning and urban-industrial-vehicular activities for trace gases and aerosol particles are obtained from several published datasets and remote sensing information. The tracer and aerosol mass concentration prognostic includes the effects of sub-grid scale turbulence in the planetary boundary layer, convective transport by shallow and deep moist convection, wet and dry deposition, and plume rise associated with vegetation fires in addition to the grid scale transport. The radiation parameterization takes into account the interaction between aerosol particles and short and long wave radiation. The atmospheric model BRAMS is based on the Regional Atmospheric Modeling System (RAMS), with several improvements associated with cumulus convection representation, soil moisture initialization and surface scheme tuned for the tropics, among others. In this paper the CATT-BRAMS model is used to simulate carbon monoxide and particulate material (PM2.5) surface fluxes and atmospheric transport during the 2002 LBA field campaigns, conducted during the transition from the dry to wet season in the southwest Amazon Basin. Model evaluation is addressed with comparisons between model results and near surface, radiosonde and airborne measurements performed during the field campaign, as well as remote sensing derived products. We show the matching of emissions strengths to observed carbon monoxide in the LBA campaign. A relatively good comparison to the MOPITT data, in spite of the fact that MOPITT a priori assumptions imply several difficulties, is also obtained.

scholarly journals Ice nucleation by viruses and their potential for cloud glaciation

2021 ◽  
Vol 18 (14) ◽  
pp. 4431-4444
Author(s):  
Michael P. Adams ◽  
Nina S. Atanasova ◽  
Svetlana Sofieva ◽  
Janne Ravantti ◽  
Aino Heikkinen ◽  
...  
Keyword(s):  
Aerosol Particles ◽  
Ice Nucleation ◽  
Marine Atmosphere ◽  
Biological Origin ◽  
Virus Particles ◽  
Particle Population ◽  
Minor Contribution ◽  
Different Types ◽  
A Minor ◽  
The Impact

Abstract. In order to effectively predict the formation of ice in clouds we need to know which subsets of aerosol particles are effective at nucleating ice, how they are distributed and where they are from. A large proportion of ice-nucleating particles (INPs) in many locations are likely of biological origin, and some INPs are extremely small, being just tens of nanometres in size. The identity and sources of such INPs are not well characterized. Here, we show that several different types of virus particles can nucleate ice, with up to about 1 in 20 million virus particles able to nucleate ice at −20 ∘C. In terms of the impact on cloud glaciation, the ice-nucleating ability (the fraction which are ice nucleation active as a function of temperature) taken together with typical virus particle concentrations in the atmosphere leads to the conclusion that virus particles make a minor contribution to the atmospheric ice-nucleating particle population in the terrestrial-influenced atmosphere. However, they cannot be ruled out as being important in the remote marine atmosphere. It is striking that virus particles have an ice-nucleating activity, and further work should be done to explore other types of viruses for both their ice-nucleating potential and to understand the mechanism by which viruses nucleate ice.

Estimating the concentration of nucleation mode aerosol particles over South Africa using satellite remote sensing measurements

2013 ◽  
Author(s):  
A.-M. Sundström ◽  
A. Nikandrova ◽  
K. Atlaskina ◽  
T. Nieminen ◽  
V. Vakkari ◽  
...  
Keyword(s):  
South Africa ◽  
Remote Sensing ◽  
Satellite Remote Sensing ◽  
Aerosol Particles ◽  
Nucleation Mode

scholarly journals Scattering of aerosol particles by a Hermite–Gaussian beam in marine atmosphere

2017 ◽  
Vol 56 (19) ◽  
pp. 5329 ◽  
Author(s):  
Qingqing Huang ◽  
Mingjian Cheng ◽  
Lixin Guo ◽  
Jiangting Li ◽  
Xu Yan ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Aerosol Particles ◽  
Marine Atmosphere

scholarly journals Ice nucleation by viruses and their potential for cloud glaciation

2021 ◽  
Author(s):  
Michael P. Adams ◽  
Nina S. Atanasova ◽  
Svetlana Sofieva ◽  
Janne Ravantti ◽  
Aino Heikkinen ◽  
...  
Keyword(s):  
Aerosol Particles ◽  
Ice Nucleation ◽  
Marine Atmosphere ◽  
Biological Origin ◽  
Virus Particles ◽  
Particle Population ◽  
Minor Contribution ◽  
Different Types ◽  
A Minor ◽  
The Impact

Abstract. In order to effectively predict the formation of ice in clouds we need to know which subsets of aerosol particles are effective at nucleating ice, how they are distributed and where they are from. A large proportion of ice-nucleating particles (INPs) in many locations are likely of biological origin, and some INPs are extremely small being just tens of nanometers in size. The identity and sources of such INPs are not well characterized. Here, we show that several different types of virus particles can nucleate ice, with up to about one in twenty million virus particles able to nucleate ice at −20 °C. In terms of the impact on cloud glaciation, the ice-nucleating ability (the fraction which are ice nucleation active as a function of temperature) taken together with typical virus particle concentrations in the atmosphere lead to the conclusion that virus particles make a minor contribution to the atmospheric ice-nucleating particle population in the terrestrial influenced atmosphere. However, they cannot be ruled out as being important in the remote marine atmosphere. It is striking that virus particles have an ice-nucleating activity and further work should be done to explore other types of viruses for both their ice-nucleating potential and to understand the mechanism by which viruses nucleate ice.

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