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#Arctic #Ny-Alesund #polarmoon #polarmoon #Arctic #Ny-Alesund #polarmoon #PolarRegions #PolarRegions ?ngström exponent absorption Angstrom coefficient absorption coefficients ACTRIS AERONET AERONET-cimel aerosol aerosol characterization aerosol climatology aerosol concentration aerosol events aerosol hygroscopicity aerosol inversion Aerosol model validation aerosol optical depth aerosol optical properties Aerosol particles aerosol pollen event aerosol products aerosol profiles Aerosol Properties Aerosol radiative effects aerosol radiative properties Aerosol vertical distribution Aerosol vertical profiles Aerosols Aerosols; Atmospheric optics agua precipitable AI Air mass back trajectories Air pollution air quality index aircraft algorithms all-sky camera Angstrom Exponent annual cycle Antarctic Antarctica AOD Arctic Arctic Haze Arctic pollution artic ash-sulphuric interactions asymptotic theory athmospheric aerosols atmosphere Atmospheric Aerosol atmospheric aerosols atmospheric composition Atmospheric correction atmospheric gases aureole scans Australian fires balloon-borne measurements biomass burning Biomass burning urban industrial Black carbon brazil Brewer BSRN caecenet caelis calibration Calibration Facility calibration transfer Calitoo sunphotometer campaign CAMS Caribbean area ceilometer Ceilometer data pre-processing ciclo anual CIMEL climatology cloud cover cloud effect efficiency (CEE) cloud effects on solar radiation (CRE) at surface cloud modification factor cloud optical depth (COD) cloud radiative effect clouds CNN Coarse and fine modes COCCON COCCON-España Columnar aerosol data Columnar and surface aerosols columnar optical properties Comparison convolutional neural network cuba Cumbre Vieja volcanic eruption cumulus and stratocumulus desert dust desert mineral dust didáctica diffuse dimming/brightening direct radiation discrete ordinate method doppler Double tropopause events DSCOVR dust dust episodes early instrumental data efecto gloria EKO MS-711 spectroradiometer Enhancement effect EPIC ESA Europe European Artic fire Fires fotómetros solares FTIR GAME GAW GHG global analysis GNSS GPS GRASP GRASP algorithm greenhouse gases hand-held sunphotometer HDR High dynamic range High turbidity episodes higroscopicity hygroscopic icenet ICP-MS image analylis image identification in-situ insolation Integrated water vapor integrating sphere intercomparison inverse methods inversion inversion products IWV Izaña Izaña Atmospheric Observatory La Palma langley Langley ratio method LIDAR Light scattering Lightning LIME long-range transport long-term AOD observations long-term characterization long-term comparison long-term trends long-wave Longwave radiative effect lunar irradiance lunar photometry marambio matrix operator method matrix Riccati equations matrix-exponential Measurement Mediterranean campaign MEGEI-MAD meteorology microphysical properties microwave radiometer Microwave radiometry Mining exploitation model MODIS MODIS–AQUA Monte-Carlo method moon moon light polarization Morphological characterization of aerosol MPPD model multi-instrument analysis NAFDI Nanoparticles NDACC FTIR Nephelometer NILU-UV radiometer nubes nuevos métodos Ny-Alesund OMI optical properties Ozone ozone radiative forcing particle formation pbl PFR Phase center variations; GPS; Water vapor photometer photometer calibration photometry physical properties planetary bounday layer PM10 threshold polar polar aerosol Polar Regions polarization polarmoon POLARUBI pollutant pollution polynomials precipitable water vapour procesados pulmonary deposition PWV PWV; PWV; atmospheric water vapor content; diurnal regime; GPS PWV; GPS Quality Assurance Quality Control Radiation radiativa effect Radiative forcing Radiative transfer radiative transfer simulations radiometer radiometry radiosonde Radiosondes reanalysis reanalysis data remote sensing retrieval ROLO Saharan Air Layer Saharan mineral dust Satellite Satellite remote sensing SAUNA campaign Scattering searchlight seasonal trends SEM SEM-EDX sensor satellinte shortwave global horizontal irradiance SIOS sky camera sky images sky radiance SLOPE smoke smoke ageing Solar radiation sondeos Sourthwestern Europe Spain spectral direct irradiance spectrometry spectrophotometer spectroradiometer spectroscopy star photometry stars stellar photometry stratospheric aerosol stratospheric density Sulphur dioxide Sun photometer sun photometry sun-photometer Sun-sky photometer sun-sky photometry sunphotometer Surface and columnar aerosol data surface solar radiation Svalbard técnicas de aceleración computacional temperature tesis transferencia radiativa Transport Troposphere tropospheric aerosol ultraviolet radiation urban UV UV irradiance UV-visible irradiance UVI Vaisala ceilometer Validation vapor de agua Vegetation Index Vegetation monitoring volcanic aerosol volcanic eruption Volcanic sulphates Water vapor water vapour ZEN-R52 Radiometer zenith sky radiance

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2024
1.	Sandra Graßl; Christoph Ritter; Jonas Wilsch; Richard Herrmann; Lionel Doppler; Roberto Román From Polar Day to Polar Night: A Comprehensive Sun and Star Photometer Study of Trends in Arctic Aerosol Properties in Ny-Ålesund, Svalbard Journal Article In: Remote Sensing, vol. 16, no. 19, 2024, ISSN: 2072-4292. Abstract \| Links \| BibTeX \| Tags: aerosol optical depth, Angstrom Exponent, Arctic Haze, long-range transport, long-term AOD observations, polar aerosol, seasonal trends @article{Graßl2024, title = {From Polar Day to Polar Night: A Comprehensive Sun and Star Photometer Study of Trends in Arctic Aerosol Properties in Ny-Ålesund, Svalbard}, author = {Sandra Graßl and Christoph Ritter and Jonas Wilsch and Richard Herrmann and Lionel Doppler and Roberto Román}, url = {https://www.mdpi.com/2072-4292/16/19/3725}, doi = {10.3390/rs16193725}, issn = {2072-4292}, year = {2024}, date = {2024-07-22}, urldate = {2024-01-01}, journal = {Remote Sensing}, volume = {16}, number = {19}, abstract = {The climate impact of Arctic aerosols, like the Arctic Haze, and their origin are not fully understood. Therefore, long-term aerosol observations in the Arctic are performed. In this study, we present a homogenised data set from a sun and star photometer operated in the European Arctic, in Ny-Ålesund, Svalbard, of the 20 years from 2004–2023. Due to polar day and polar night, it is crucial to use observations of both instruments. Their data is evaluated in the same way and follows the cloud-screening procedure of AERONET. Additionally, an improved method for the calibration of the star photometer is presented. We found out, that autumn and winter are generally more polluted and have larger particles than summer. While the monthly median Aerosol Optical Depth (AOD) decreases in spring, the AOD increases significantly in autumn. A clear signal of large particles during the Arctic Haze can not be distinguished from large aerosols in winter. With autocorrelation analysis, we found that AOD events usually occur with a duration of several hours. We also compared AOD events with large-scale processes, like large-scale oscillation patterns, sea ice, weather conditions, or wildfires in the Northern Hemisphere but did not find one single cause that clearly determines the Arctic AOD. Therefore the observed optical depth is a superposition of different aerosol sources.}, keywords = {aerosol optical depth, Angstrom Exponent, Arctic Haze, long-range transport, long-term AOD observations, polar aerosol, seasonal trends}, pubstate = {published}, tppubtype = {article} } Close The climate impact of Arctic aerosols, like the Arctic Haze, and their origin are not fully understood. Therefore, long-term aerosol observations in the Arctic are performed. In this study, we present a homogenised data set from a sun and star photometer operated in the European Arctic, in Ny-Ålesund, Svalbard, of the 20 years from 2004–2023. Due to polar day and polar night, it is crucial to use observations of both instruments. Their data is evaluated in the same way and follows the cloud-screening procedure of AERONET. Additionally, an improved method for the calibration of the star photometer is presented. We found out, that autumn and winter are generally more polluted and have larger particles than summer. While the monthly median Aerosol Optical Depth (AOD) decreases in spring, the AOD increases significantly in autumn. A clear signal of large particles during the Arctic Haze can not be distinguished from large aerosols in winter. With autocorrelation analysis, we found that AOD events usually occur with a duration of several hours. We also compared AOD events with large-scale processes, like large-scale oscillation patterns, sea ice, weather conditions, or wildfires in the Northern Hemisphere but did not find one single cause that clearly determines the Arctic AOD. Therefore the observed optical depth is a superposition of different aerosol sources. Close https://www.mdpi.com/2072-4292/16/19/3725 doi:10.3390/rs16193725 Close
2021
2.	S. Herrero-Anta; D. Mateos; C. Toledano; R. Román; R. González; C. Ritter; J.C. Antuña-Sanchez; D. González-Fernández; A. Calle; V.E. Cachorro; A.M. de Frutos Inventory of aerosol episodes in Ny-Ålesund (Svalbard) in the period 2017-2020 by sun photometry Conference EGU21, European Geosciences Union (EGU) Online, 2021. Abstract \| BibTeX \| Tags: AERONET, Arctic Haze, High turbidity episodes, Svalbard @conference{Herrero-Anta2021b, title = {Inventory of aerosol episodes in Ny-Ålesund (Svalbard) in the period 2017-2020 by sun photometry}, author = { S. Herrero-Anta and D. Mateos and C. Toledano and R. Román and R. González and C. Ritter and J.C. Antuña-Sanchez and D. González-Fernández and A. Calle and V.E. Cachorro and A.M. de Frutos}, year = {2021}, date = {2021-04-29}, booktitle = {EGU21}, address = {Online}, organization = {European Geosciences Union (EGU)}, abstract = {Atmospheric aerosols are an important forcing agent in the estimation of radiative budget, being the Arctic an area of special weakness. The Group of Atmospheric Optics, University of Valladolid and the Alfred Wegener Institute for Polar and Marine Research, installed in 2017 a CE-318T Sun-sky-Moon photometer (Cimel Electronique S.A.S) in the Arctic station Ny-Ålesund (79ºN, 12ºE). This study presents an inventory of all high-turbidity aerosol episodes recorded in the period 2017-2020 (data of level 1.5-validated from AERONET). This inventory is based on the separate analysis of coarse and fine mode aerosol optical depth. Aerosol episodes are attributed to coarse, fine or mixture of aerosols. Complementary information provided by HYSPLIT air mass back trajectories, MODIS images, forecast aerosol models, CALIOP/CALIPSO satellite data, and other collocated instruments on the station are also used. Special focus is given to long-range transport of aerosols from big forest fires in Canada, United States and Russia}, keywords = {AERONET, Arctic Haze, High turbidity episodes, Svalbard}, pubstate = {published}, tppubtype = {conference} } Close Atmospheric aerosols are an important forcing agent in the estimation of radiative budget, being the Arctic an area of special weakness. The Group of Atmospheric Optics, University of Valladolid and the Alfred Wegener Institute for Polar and Marine Research, installed in 2017 a CE-318T Sun-sky-Moon photometer (Cimel Electronique S.A.S) in the Arctic station Ny-Ålesund (79ºN, 12ºE). This study presents an inventory of all high-turbidity aerosol episodes recorded in the period 2017-2020 (data of level 1.5-validated from AERONET). This inventory is based on the separate analysis of coarse and fine mode aerosol optical depth. Aerosol episodes are attributed to coarse, fine or mixture of aerosols. Complementary information provided by HYSPLIT air mass back trajectories, MODIS images, forecast aerosol models, CALIOP/CALIPSO satellite data, and other collocated instruments on the station are also used. Special focus is given to long-range transport of aerosols from big forest fires in Canada, United States and Russia Close
3.	S. Herrero-Anta; C. Toledano; R. Román; R. González; C. Rtitter; J.C. Antuña-Sánchez; D. González-Fernández; A. Calle; V.E. Cachorro; A.M. de Frutos Long range transported aerosol events over Ny-Alesund (Svalbard) in 2020 observed with Sun-Sky-Moon photometry Conference Arctic Science Summit Week 2021 (ASSW2021), International Arctic Science Committee (IASC) Lisbon, Portugal (online), 2021. Abstract \| BibTeX \| Tags: AERONET, Aerosol Properties, Arctic Haze, biomass burning, Svalbard @conference{Herrero-Anta2021, title = {Long range transported aerosol events over Ny-Alesund (Svalbard) in 2020 observed with Sun-Sky-Moon photometry}, author = {S. Herrero-Anta and C. Toledano and R. Román and R. González and C. Rtitter and J.C. Antuña-Sánchez and D. González-Fernández and A. Calle and V.E. Cachorro and A.M. de Frutos}, year = {2021}, date = {2021-03-26}, booktitle = {Arctic Science Summit Week 2021 (ASSW2021)}, address = {Lisbon, Portugal (online)}, organization = {International Arctic Science Committee (IASC)}, abstract = {The recent development of the of Sun-sky-Moon photometers allows using both Sun and Moon as light sources to retrieve columnar aerosol properties. In this framework, the Group of Atmospheric optics, University of Valladolid and the Alfred Wegener Institute for Polar and Marine Research, installed in 2017 a CE-318T Sun-sky-Moon photometer (Cimel Electronique S.A.S) in the Arctic station Ny-Ålesund (79oN, 12oE). This instrument contributes to the AErosol RObotic NETwork (AERONET), and it is recording a continuous (summer +winter) database of columnar aerosol properties. This study presents an inventory of all high-turbidity aerosol episodes recorded in 2020 based on the mentioned photometer measurements. Complementary information provided by HYSPLIT air mass back trajectories, MODIS images, forecast aerosol models, CALIOP/CALIPSO satellite data, and other collocated instruments on the station are also used. Special focus is given to long-range transport of aerosols from forest fires in Canada, United States and Russia.}, keywords = {AERONET, Aerosol Properties, Arctic Haze, biomass burning, Svalbard}, pubstate = {published}, tppubtype = {conference} } Close The recent development of the of Sun-sky-Moon photometers allows using both Sun and Moon as light sources to retrieve columnar aerosol properties. In this framework, the Group of Atmospheric optics, University of Valladolid and the Alfred Wegener Institute for Polar and Marine Research, installed in 2017 a CE-318T Sun-sky-Moon photometer (Cimel Electronique S.A.S) in the Arctic station Ny-Ålesund (79oN, 12oE). This instrument contributes to the AErosol RObotic NETwork (AERONET), and it is recording a continuous (summer +winter) database of columnar aerosol properties. This study presents an inventory of all high-turbidity aerosol episodes recorded in 2020 based on the mentioned photometer measurements. Complementary information provided by HYSPLIT air mass back trajectories, MODIS images, forecast aerosol models, CALIOP/CALIPSO satellite data, and other collocated instruments on the station are also used. Special focus is given to long-range transport of aerosols from forest fires in Canada, United States and Russia. Close

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