<?xml version="1.0" encoding="UTF-8"?><!--*** Generated from internal PANGAEA metadata schema by dif.xslt ***--><DIF xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.4.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/">
<Entry_ID>PANGAEA_995211</Entry_ID>
<Entry_Title>Height dependent aerosol optical depth in the spectral range from 350 nm - 1050 nm in March / April 2022 during HALO-AC3 2022</Entry_Title>
<Data_Set_Citation>
<Dataset_Creator>Herber, Andreas</Dataset_Creator>
<Dataset_Title>Height dependent aerosol optical depth in the spectral range from 350 nm - 1050 nm in March / April 2022 during HALO-AC3 2022</Dataset_Title>
<Dataset_Release_Date>2026-07-06</Dataset_Release_Date>
<Dataset_Publisher>PANGAEA</Dataset_Publisher>
<Data_Presentation_Form>Dataset</Data_Presentation_Form>
<Online_Resource>https://doi.pangaea.de/10.1594/PANGAEA.995211</Online_Resource>
</Data_Set_Citation>
<Personnel>
<Role>Investigator</Role>
<First_Name>Andreas</First_Name>
<Last_Name>Herber</Last_Name>
<Email>andreas.herber@awi.de</Email>
</Personnel>
<Discipline>
<Discipline_Name>Earth Science</Discipline_Name>
</Discipline>
<Parameters>
<Detailed_Variable>Event label</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Identification</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>DATE/TIME</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>ALTITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>LATITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>LONGITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Aerosol optical thickness at 414 nm</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Aerosol optical thickness at 496 nm</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Aerosol optical thickness at 861 nm</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Aerosol optical thickness at 1026 nm</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Spectral slope</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Aerosol optical thickness at 1000 nm</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Sun elevation</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Comment</Detailed_Variable>
</Parameters>
<ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
<Keyword>aerosol optical depth</Keyword>
<Keyword>Airborne Sun photometer</Keyword>
<Keyword>Aircraft</Keyword>
<Keyword>Atmospheric aerosol</Keyword>
<Keyword>HALO-AC3_20220320_P5_RF01</Keyword>
<Keyword>HALO-AC3_20220322_P5_RF03</Keyword>
<Keyword>HALO-AC3_20220325_P5_RF04</Keyword>
<Keyword>HALO-AC3_20220328_P5_RF05</Keyword>
<Keyword>HALO-AC3_20220329_P5_RF07</Keyword>
<Keyword>HALO-AC3_20220330_P5_RF08</Keyword>
<Keyword>HALO-AC3_20220401_P5_RF09</Keyword>
<Keyword>HALO-AC3_20220404_P5_RF10</Keyword>
<Keyword>HALO-AC3_20220405_P5_RF11</Keyword>
<Keyword>HALO-AC3_20220407_P5_RF12</Keyword>
<Keyword>P5_232_HALO_2022_2203200401</Keyword>
<Keyword>P5_232_HALO_2022_2203220602</Keyword>
<Keyword>P5_232_HALO_2022_2203250701</Keyword>
<Keyword>P5_232_HALO_2022_2203280801</Keyword>
<Keyword>P5_232_HALO_2022_2203291002</Keyword>
<Keyword>P5_232_HALO_2022_2203301101</Keyword>
<Keyword>P5_232_HALO_2022_2204011201</Keyword>
<Keyword>P5_232_HALO_2022_2204041301</Keyword>
<Keyword>P5_232_HALO_2022_2204051401</Keyword>
<Keyword>P5_232_HALO_2022_2204071501</Keyword>
<Keyword>P5-232_HALO_2022</Keyword>
<Sensor_Name>
<Long_Name>Airborne Sun Photometer, Dr. Schulz &amp; Partner GmbH, SP1A</Long_Name>
</Sensor_Name>
<Source_Name>
<Long_Name>POLAR 5</Long_Name>
</Source_Name>
<Temporal_Coverage>
<Start_Date>2022-03-20</Start_Date>
<Stop_Date>2022-04-07</Stop_Date>
</Temporal_Coverage>
<Data_Set_Progress>Complete</Data_Set_Progress>
<Spatial_Coverage>
<Southernmost_Latitude>78.235</Southernmost_Latitude>
<Northernmost_Latitude>81.536</Northernmost_Latitude>
<Westernmost_Longitude>-1.118</Westernmost_Longitude>
<Easternmost_Longitude>16.562</Easternmost_Longitude>
<Minimum_Altitude>26.6 m (ALTITUDE)</Minimum_Altitude>
<Maximum_Altitude>3070.0 m (ALTITUDE)</Maximum_Altitude>
</Spatial_Coverage>
<Project>
<Short_Name>AC3</Short_Name>
<Long_Name>Arctic Amplification</Long_Name>
</Project>
<Access_Constraints>access rights needed</Access_Constraints>
<Use_Constraints>CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends)</Use_Constraints>
<Data_Set_Language>English</Data_Set_Language>
<Data_Center>
<Data_Center_Name>
<Short_Name>PANGAEA</Short_Name>
<Long_Name>Data Publisher for Earth &amp; Environmental Science</Long_Name>
</Data_Center_Name>
<Data_Center_URL>https://www.pangaea.de/</Data_Center_URL>
<Personnel>
<Role>Data Center Contact</Role>
<First_Name>Michael</First_Name>
<Last_Name>Diepenbroek</Last_Name>
<Email>info@pangaea.de</Email>
<Contact_Address>
<Address>Leobener Str.</Address>
<City>Bremen</City>
<Province_or_State>Bremen</Province_or_State>
<Postal_Code>28359</Postal_Code>
<Country>Germany</Country>
</Contact_Address>
</Personnel>
</Data_Center>
<Distribution>
<Distribution_Media>online</Distribution_Media>
<Distribution_Size>450 data points</Distribution_Size>
<Distribution_Format>text/tab-separated-values</Distribution_Format>
</Distribution>
<Reference>Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung (2016): Polar aircraft Polar5 and Polar6 operated by the Alfred Wegener Institute. Journal of large-scale research facilities JLSRF, 2, A87, https://doi.org/10.17815/jlsrf-2-153</Reference>
<Reference>Ehrlich, André; Wendisch, Manfred; Lüpkes, Christof; Buschmann, Matthias; Bozem, Heiko; Chechin, Dmitry; Clemen, Hans-Christian; Dupuy, Regis; Eppers, Oliver; Hartmann, Jörg; Herber, Andreas; Jäkel, Evelyn; Järvinen, Emma; Jourdan, Olivier; Kästner, Udo; Kliesch, Leif-Leonard; Köllner, Franziska; Mech, Mario; Mertes, Stephan; Neuber, Roland; Ruiz-Donoso, Elena; Schnaiter, Martin; Schneider, Johannes; Stapf, Johannes; Zanatta, Marco (2019): A comprehensive in situ and remote sensing data set from the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) campaign. Earth System Science Data, 11(4), 1853-1881, https://doi.org/10.5194/essd-11-1853-2019</Reference>
<Summary>During the HALO-AC3 2022 (HALO – Arctic Amplification) campaign, conducted in March and April 2022 in the vicinity of Svalbard height dependent aerosol optical depth (AOD) in the spectral range from 350 nm to 1050 nm with the airborne Sun photometer SPTA were measured. Observations were performed on board of the Alfred-Wegener-Institute research aircraft Polar 5 during 10 flights between the 20 Mach 2022 up to 07 April 2022 with the operation base Longyearbyen (78° 13′ N, 15° 38′ E). Based on the height dependent aerosol optical depth for four selected wavelengths (414 nm, 496 nm, 861 nm, 1026 nm) and the Ångström parameter Alpha (spectral slope) and Beta (AOD at 1000 nm) between 27 m and 3070m the extinction coefficient (AOD per kilometer) can be calculated for selected wavelengths, for example for LIDAR or satellite comparison and validation. For special comparison is also the height angle pf the Sun included. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.995211"!</Summary>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/Altitude</URL>
<Description>ALTITUDE</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_6709</URL>
<Description>LATITUDE</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_6709</URL>
<Description>LONGITUDE</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_8601</URL>
<Description>DATE/TIME</Description>
</Related_URL>
<Related_URL>
<URL>https://disc.gsfc.nasa.gov/information/glossary?title=Aerosol%20Optical%20Thickness</URL>
<Description>Aerosol optical thickness at 414 nm</Description>
</Related_URL>
<Related_URL>
<URL>https://disc.gsfc.nasa.gov/information/glossary?title=Aerosol%20Optical%20Thickness</URL>
<Description>Aerosol optical thickness at 496 nm</Description>
</Related_URL>
<Related_URL>
<URL>https://disc.gsfc.nasa.gov/information/glossary?title=Aerosol%20Optical%20Thickness</URL>
<Description>Aerosol optical thickness at 861 nm</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.17815/jlsrf-2-153</URL>
<Description>POLAR 5</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.17815/jlsrf-2-153</URL>
<Description>Polar aircraft Polar5 and Polar6 operated by the Alfred Wegener Institute</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.5194/essd-11-1853-2019</URL>
<Description>A comprehensive in situ and remote sensing data set from the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) campaign</Description>
</Related_URL>
<Related_URL>
<URL>https://gepris.dfg.de/project/268020496</URL>
<Description>AC3</Description>
</Related_URL>
<Related_URL>
<URL>https://www.awi.de/en/about-us/organisation/staff/single-view/andreas-herber.html</URL>
</Related_URL>
<Metadata_Name>DIF</Metadata_Name>
<Metadata_Version>9.4</Metadata_Version>
<DIF_Creation_Date>2026-07-06</DIF_Creation_Date>
<Last_DIF_Revision_Date>2026-08-04</Last_DIF_Revision_Date>
</DIF>
