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Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2023
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation measurements. The ozone layer has been measured at three locations since 1979: In Oslo/Kjeller, Tromsø/Andøya and Ny-Ålesund. The UV measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above Norway between 1979 and 1997. After that, the ozone layer stabilized at a level ~2% below pre-1980 level. The year 2023 was characterized by low ozone values in winter, high spring values, and annual average total ozone values slightly below the long-term mean.
NILU
2024
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2022.
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation measurements. The ozone layer has been measured at three locations since 1979: In Oslo/Kjeller, Tromsø/Andøya and Ny-Ålesund. The UV-measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above Norway between 1979 and 1997. After that, the ozone layer stabilized at a level ~2% below pre-1980 level. The year 2022 was characterized by annual average total ozone values slightly below “normal”.
NILU
2023
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2021.
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation measurements. The ozone layer has been measured at three locations since 1979: In Oslo/Kjeller, Tromsø/Andøya and Ny-Ålesund. The UV-measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above Norway between 1979 and 1997. After that, the ozone layer stabilized at a level ~2% below pre-1980 level. The year 2021 was characterized by low total ozone values in June and July, whereas “normal” ozone values were measured during winter and spring.
NILU
2022
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2020.
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation measurements. The ozone layer has been measured at three locations since 1979: In Oslo/Kjeller, Tromsø/Andøya and Ny-Ålesund. The UV measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above Norway between 1979 and 1997. After that, the ozone layer stabilized at a level ~2% below pre-1980 level. 2020 was characterized by a strong, cold, and persistent Arctic stratospheric vortex, leading to extensive formation of Polar Stratospheric Clouds (PSCs, mother-of-pearl clouds) and chemical ozone destruction with very low ozone values and high UV levels in the exposed regions in the spring.
NILU
2021
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2019.
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation
measurements. The ozone layer has been measured at three locations since 1979: In Oslo/Kjeller, Tromsø/Andøya and
Ny-Ålesund. The UV measurements started in 1995. The results show that there was a significant decrease in stratospheric
ozone above Norway between 1979 and 1997. After that, the ozone layer stabilized at a level ~2% below pre-1980 level.
2019 was characterized by low ozone values in April and an “ozone hole” in Southern Norway in December 2019.
NILU
2020
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual Report 2018.
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation
measurements. The ozone layer has been measured at three locations since 1979: in Oslo, Tromsø/Andøya and Ny-Ålesund.
The UV measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above
Norway between 1979 and 1997. After that the ozone layer stabilized at a level ~2% below pre-1980 level. 2018 was
characterized by low summer ozone values in Oslo and a record high annual integrated UV-dose.
NILU
2019
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2016. NILU report
Denne rapporten presenterer resultatene fra det norske måleprogrammet for totalozon og UV-
stråling. Ozonlaget har blitt målt ved tre stasjoner siden 1979: i Oslo, Tromsø/Andøya og Ny-Ålesund. UV-målinger startet i 1995. Resultatene viser at det var en signifikant ozonreduksjon over Norge i perioden 1979 til 1997. Deretter stanset en videre reduksjon og ozonverdiene stabiliserte seg på et nivå ~2% lavere enn 1979-1989 middelet. Det er imidlertid store årlige fluktuasjoner, og i 2016 var det gjennomsnittlige ozonlaget relativt tynt, spesielt i februar og mars.
2017
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2015. NILU report
Denne rapporten presenterer resultatene fra det norske måleprogrammet for totalozon og UV-stråling. Ozonlaget har blitt målt ved tre stasjoner siden 1979: i Oslo, Tromsø/Andøya og Ny-Ålesund. UV-målinger startet i 1995. Resultatene viser at det var en signifikant ozonreduksjon over Norge i perioden 1979 til 1997. Deretter stanset en videre reduksjon og ozonverdiene stabiliserte seg på et nivå ~2% lavere enn 1979-1989 middelet. Det er imidlertid store årlige fluktuasjoner, og i 2015 var den gjennomsnittlige ozontykkelsen relativ høy og nær 1979-1989-nivået ved alle de tre norske stasjonene.
2016
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2014. NILU OR
Rapporten presenterer måledata for totalozon og UV-stråling over norske målestasjoner i 2014.
For Oslo, Andøya og Ny-Ålesund er trenden i totalozon beregnet for perioden 1979-2014.
Ozonlaget over Norge var relativt tynt våren 2014, men det tok seg opp i april/mai, og verdiene
var tilnærmet normale resten av året. Den klare reduksjonen av ozonlaget over Norge i perioden
1979-1997 stoppet opp i 1998, og ozonlaget over Norge ser nå ut til å ha stabilisert seg.
2015
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2013. NILU OR
Rapporten presenterer måledata for totalozon og UV-stråling over norske målestasjoner i 2013. For Oslo, Andøya og Ny-Ålesund er trenden i totalozon beregnet for perioden 1979-2013. Ozonverdiene over Norge var tilnærmet normale 2013. Den klare reduksjonen av ozonlaget over Norge i perioden 1979-1997 stoppet opp i 1998 og ozonlaget over Norge ser nå ut til å ha stabilisert seg.
2014
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2012. NILU OR
Rapporten presenterer måledata for totalozon og UV-stråling over norske målestasjoner i 2012. For Oslo, Andøya og Ny-Ålesund er trenden i totalozon beregnet for perioden 1979-2012. Ozonverdiene over Norge var tilnærmet normale 2012, bortsett fra vinterverdiene i Oslo som var lavere enn normalt. Den klare reduksjonen av ozonlaget over Norge i perioden 1979-1997 stoppet opp i 1998 og ozonlaget over Norge ser nå ut til å ha stabilisert seg.
2013
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2011. NILU OR
Rapporten presenterer måledata for totalozon, vertikalfordelingen av ozon og UV-stråling over norske målestasjoner i 201|. For Oslo og Andøya er trenden i totalozon beregnet for perioden 1979-2011.
Ozonverdiene over Norge var generelt lave i hele 2011. Den klare reduksjonen av ozonlaget over Norge i perioden 1979-1997 stoppet opp i 1998 og ozonlaget over Norge ser nå ut til å ha stabilisert seg.
2012
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2010. NILU OR
Rapporten presenterer måledata for totalozon, vertikalfordelingen av ozon og UV-stråling over norske målestasjoner i 2010. For Oslo og Andøya er trenden i totalozon beregnet for perioden 1979-2010.
Ozonverdiene over Norge var generelt høye i 2010. Den klare reduksjonen av ozonlaget over Norge i perioden 1979-1997 stoppet opp i 1998 og ozonlaget over Norge ser nå ut til å ha stabilisert seg.
2011
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2009. NILU OR
2010
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2008. NILU OR
2009
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2007. NILU OR
2008
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2006. NILU OR
2007
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2005. NILU OR
2006
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2004. NILU OR
2005
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation. Annual report 2003 NILU OR
2004
Monitoring of the atmospheric ozone layer and natural ultraviolet radiation: Annual report 2017.
This report summarizes the results from the Norwegian monitoring programme on stratospheric ozone and UV radiation measurements. The ozone layer has been measured at three locations since 1979: in Oslo, Tromsø/Andøya and Ny-Ålesund. The UV measurements started in 1995. The results show that there was a significant decrease in stratospheric ozone above Norway between 1979 and 1997. After that the ozone layer stabilized at a level ~2% below pre-1980 level. There are large inter-annual variations and in 2017 there were relatively low values at all the three Norwegian stations during the winter. However, the ozone situation normalized towards the end of spring.
NILU
2018
2015
Monitoring of size-segregated particulate matter fractions with optical instruments in urban areas.
The assessment of harmful PM concentrations i.e. particles with an aerodynamic diameter below 2.5 µm, requires continuous monitoring conducted for 24 hours a day, for 365 days a year. Monitoring campaigns for screening the PM levels in a particular urban area facilitate the conceiving of a continuous monitoring plan by establishing where to deploy optimally the optical instruments for on-line measurement. The paper presents the practical efficiency of the outdoor monitoring of PM size fractions using a new optical equipment i.e. Dusttrak DRX 8533 with environmental enclosure and heating module. The experiments were carried out in Targoviste city, Romania, between 2014 and 2015 within the first two phases of the ROkidAIR project (http://www.rokidair.ro) to perform a screening of the PM concentrations existing in these urban areas and to calibrate the prototype of the PM2.5 microstation developed within the project .The utilization of the DustTrak instrument showed that in heavy traffic conditions without significant industrial emissions, the most frequent PM fraction is the submicrometric one (PM1).The results pointed out the usefulness of monitoring four size segregated mass fractions and their relationship with the potential PM emission sources. Outdoor PM2.5 measurements provide key information for evaluating population exposure, planning of air quality and establishing of reliable measures that allow the lowering of PM emission.
2016
2008