{"id":44306,"date":"2020-05-25T10:38:47","date_gmt":"2020-05-25T08:38:47","guid":{"rendered":"https:\/\/aktuelles.uni-frankfurt.de\/?p=44306"},"modified":"2023-02-22T16:00:13","modified_gmt":"2023-02-22T15:00:13","slug":"bluesky-scrutinizes-the-lockdown-altered-atmosphere","status":"publish","type":"post","link":"https:\/\/aktuelles.uni-frankfurt.de\/en\/english\/bluesky-scrutinizes-the-lockdown-altered-atmosphere\/","title":{"rendered":"BLUESKY scrutinizes the lockdown-altered atmosphere"},"content":{"rendered":"
\"\"
The research aircraft HALO taking off on 21 May 2020. Measurement equipment from Goethe University is also on board.<\/figcaption><\/figure><\/div>\n\n\n\n

The COVID-19 pandemic is not only\naffecting almost every aspect of our daily lives, but also the environment. A\nGerman team including atmosphere researchers around Prof. Joachim Curtius\n(Goethe University Frankfurt) now wants to find out how strong these effects\nare on the atmosphere. Over the next two weeks, as part of the BLUESKY research\nprogramme, the scientists led by the Max Planck Institute for Chemistry and the\nGerman Aerospace Center (Deutsches Zentrum f\u00fcr Luft- und Raumfahrt; DLR) will measure\nconcentrations of trace gases and pollutants in the air over European urban\nareas and in the flight corridor to North America. The aim of these research\nmissions is to investigate how reduced emissions from industry and transport\nare changing atmospheric chemistry and physics.<\/p>\n\n\n\n

A clear blue sky without condensation\ntrails and empty streets \u2013 this is a typical situation during the Coronavirus\nlockdown. Traffic, particularly air transport, and industrial production have\nbeen reduced worldwide due to the COVID-19 pandemic. There are fewer aircraft\nin the air and vehicles on the road in Europe than before the pandemic. Air\npollution has dropped by 20 to 40 percent, and daily emissions from aircraft\nhave decreased by up to 85 percent. This means that the atmosphere is much less\npolluted with emissions from transport and industry.<\/p>\n\n\n\n

A German research team now wants to make\nrapid use of this unusual situation for the BLUESKY project. Scientists from\nDLR, the Max Planck Institute for Chemistry, Goethe University Frankfurt, and\nthe research centres at J\u00fclich and Karlsruhe intend to use two DLR research\naircraft to conduct a globally unique investigation into the resulting changes\nin Earth’s atmosphere for the first time. DLR\u2019s HALO and Falcon research\naircraft have been equipped with highly specialised instrumentation and will\nfly over Germany, Italy, France, Great Britain and Ireland in the course of the\nnext two weeks. They will also fly over the North Atlantic, along the flight\ncorridor to North America.<\/p>\n\n\n\n

\u201cDLR is deploying part of its unique\nresearch aircraft fleet to exploit an almost unique opportunity. During these\nmissions, the atmosphere will be analysed in a state that could be achieved in\nthe future with sustainable management of human activities. We will observe how\nthe environment changes with the ramp-up of industrial activities. This will\ngive us an entirely new perspective on the anthropogenic influence on Earth\u2019s\natmosphere,\u201d explains Rolf Henke, DLR Executive Board Member responsible for\naeronautics research. \u201cTogether with our partners, we are making a significant\ncontribution to redefining humankind\u2019s activities once the pandemic is under\ncontrol.\u201d<\/p>\n\n\n\n

Coordinated research flights with two measurement\naircraft<\/strong><\/p>\n\n\n\n

Jos Lelieveld, Director of the Max Planck Institute\nfor Chemistry, wants to use the BLUESKY missions to clarify whether there is a\ncorrelation between the clear blue sky during the lockdown and the prevalence\nof aerosol particles in the atmosphere. \u201cThe unique blue sky of recent weeks\ncannot be explained by meteorological conditions and the decrease in emissions\nnear the ground. Aircraft may have a greater impact on the formation of aerosol\nparticles than previously thought,\u201d says the atmospheric researcher, who is the\nScientific Director of the HALO flights. Aerosols, microscopic particles in the\nair that also influence cloud formation, are finely distributed. They scatter\nand absorb solar radiation and thus also have an impact on the climate, because\nthey influence the radiation balance of the atmosphere. Aerosols are created,\namongst other ways, during the combustion of fossil fuels.<\/p>\n\n\n\n

Christiane Voigt, Head of the Cloud\nPhysics Department at the DLR Institute of Atmospheric Physics and Scientific\nDirector of the Falcon flights, also sees a unique opportunity with BLUESKY.\n\u201cThe current state of the atmosphere represents a kind of \u2018zero point\u2019 for\nscience. We will be able to measure a reference atmosphere that is only\nslightly polluted with emissions from industry and transport, including\naviation. This gives us a unique opportunity to better understand the effects\nof the anthropogenic emissions prior to the shutdown.\u201d The atmospheric\nphysicist emphasises that, only through the cooperation of all the partners,\nwas it possible to plan and implement the scientifically and logistically\nhighly complex missions at very short notice.<\/p>\n\n\n\n

Emissions from air transport, industry and road\ntraffic in urban areas<\/strong><\/p>\n\n\n\n

Voigt and her colleagues believe that the\nBLUESKY data will provide a clearer picture of anthropogenic influences on the\ncomposition of Earth\u2019s atmosphere. With the equipment on board both research\naircraft, the BLUESKY scientists are investigating aircraft emissions such as\nnitrogen oxides, sulphur dioxide and aerosols at cruising altitude, in addition\nto the few remaining contrails. Among other things, they want to find out how\nmuch these emissions have decreased over Europe and the North Atlantic flight\ncorridor. Approximately 30,000 aircraft fly over Europe every day, with\ncorrespondingly significant emissions. The reduced air traffic will allow more\nflexible flight routes for the measurements.<\/p>\n\n\n\n

\"\"
An employee of the Institute for Atmospheric and Environmental Sciences sets up the measuring equipment from Goethe University. Credit: DLR<\/figcaption><\/figure><\/div>\n\n\n\n

In addition, the researchers want to\ninvestigate the reduced emission plumes from urban areas and clarify how\nemissions are distributed at the atmospheric boundary layer. For example, the\nBLUESKY scientists plan to fly over the Ruhr area and the regions around\nFrankfurt am Main, Berlin and Munich. Flights over the Po Valley in Italy and\naround Paris and London are also planned. \u201cClose to cities and conurbations, we\nwill approach the atmospheric boundary layer at an altitude of one to two\nkilometres, since emissions from road traffic and industry are concentrated\nthere,\u201d explains Jos Lelieveld. \u201cWe are interested in how much the\nconcentrations of sulphur dioxide, nitrogen oxides, hydrocarbons and their\nchemical reaction products, as well as ozone and aerosols, have changed.\u201d He is\nalso very proud that the team is the first in the world to implement a\nmeasurement campaign of this type.<\/p>\n\n\n\n

Rapid preparations for flights \u2013 with special\ninfection control rules<\/strong><\/p>\n\n\n\n

In recent weeks, two DLR research aircraft\n\u2013 the Falcon 20E and the Gulfstream G550 HALO \u2013 have been successfully\nconverted at short notice for the BLUESKY missions. The conversions were\ncarried out at the DLR Flight Operations Facility in Oberpfaffenhofen.\n\u201cNumerous instruments have had to be installed and adapted, and the aircraft\nmodified for the upcoming missions,\u201d says Burkard Wigger, Head of DLR Flight\nExperiments. \u201cClose cooperation between the various scientific organisations\nhas made it possible for these two research aircraft to operate simultaneously\nunder the challenging conditions resulting from the Coronavirus pandemic.\u201d<\/p>\n\n\n\n

The preparation, execution and follow-up\nof the flights is being carried out in accordance with the current rules\nregarding personal interactions and infection control. Joint flights by Falcon\nand HALO are planned until the first half of June. The evaluation of the data\nand the analysis of the results will then take several months. The analysis\nwill include comparative data from previous HALO research flight campaigns on\nair traffic emissions and emissions from major cities and conurbations.<\/p>\n\n\n\n

About HALO<\/strong><\/p>\n\n\n\n

The High Altitude and Long Range (HALO)\nresearch aircraft is a joint initiative of German environmental and climate\nresearch institutions. HALO is supported by grants from the Federal Ministry of\nEducation and Research (BMBF), the German Research Foundation (DFG), the\nHelmholtz Association of German Research Centres, the Max Planck Society (MPG),\nthe Leibniz Association, the Free State of Bavaria, the Karlsruhe Institute of\nTechnology (KIT), the Forschungszentrum J\u00fclich and the German Aerospace Center\n(DLR).<\/p>","protected":false},"excerpt":{"rendered":"

The COVID-19 pandemic is not only affecting almost every aspect of our daily lives, but also the environment. A German team including atmosphere researchers around Prof. Joachim Curtius (Goethe University […]<\/p>\n","protected":false},"author":8,"featured_media":44301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"categories":[126,254],"tags":[239],"post_folder":[],"class_list":["post-44306","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-english","category-research","tag-geosciences-and-geography"],"yoast_head":"\nBLUESKY scrutinizes the lockdown-altered atmosphere | Aktuelles aus der Goethe-Universit\u00e4t Frankfurt<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aktuelles.uni-frankfurt.de\/en\/english\/bluesky-scrutinizes-the-lockdown-altered-atmosphere\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BLUESKY scrutinizes the lockdown-altered atmosphere | Aktuelles aus der Goethe-Universit\u00e4t Frankfurt\" \/>\n<meta property=\"og:description\" content=\"The COVID-19 pandemic is not only affecting almost every aspect of our daily lives, but also the environment. 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