Gå til innhold
  • Send

  • Kategori

  • Sorter etter

  • Antall per side

Fant 9489 publikasjoner. Viser side 1 av 380:

Publikasjon  
År  
Kategori

– Ta på ullsokker og fyr litt mindre!

Grythe, Henrik (intervjuobjekt); Pedersen, Lars Håkon (journalist)

2021

"Antarctic Haze?", NILUs activities at the TROLL station. NILU F

Stebel, K.; Holmén, K.; Ström, J.; Lunder, C.; Hanssen, J.E.; Berg, T.; Høiskar, B-A.; Solberg, S.; Stohl, A.

2005

«Virusvåren» har renset luften i Europa

Solbakken, Christine Forsetlund (intervjuobjekt); Løkken, Niklas (journalist)

2020

10-year satellite-constrained fluxes of ammonia improve performance of chemistry transport models

Evangeliou, Nikolaos; Balkanski, Yves; Eckhardt, Sabine; Cozic, Anne; Van Damme, Martin; Coheur, Pierre-François; Clarisse, Lieven; Shephard, Mark W.; Cady-Pereira, Karen; Hauglustaine, Didier

2021

140.000 tonn mikroplast fra biltrafikk havner hvert år i havet

Evangeliou, Nikolaos (intervjuobjekt); Seehusen, Joachim (journalist)

2020

20 years of VOC monitoring in EMEP. NILU F

Tørseth, K.; Solberg, S.; Schmidbauer, N.; Hermansen, O.

2014

20-year climatology of NO3- and NH4+ wet deposition at Ny-Ålesund, Svalbard.

Kühnel, R.; Roberts, T.J.; Björkman, M.P.; Isaksson, E.; Aas, W.; Holmén, K.; Ström, J.

2011

3D models and organs on chip

Mariussen, Espen; Elje, Elisabeth; Hesler, Michelle; knoll, Thorsten; Rundén-Pran, Elise; Dusinska, Maria; Kohl, Yvonne

2018

4D-Var assimilation of MIPAS chemical observations: Ozone and nitrogen dioxide analyses.

Errera, Q.; Daerden, F.; Chabrillat, S.; Lambert, J.C.; Lahoz, W.A.; Viscardy, S.; Bonjean, S.; Fonteyn, D.

2008

5 years of Sentinel-5P TROPOMI operational ozone profiling and geophysical validation using ozonesonde and lidar ground-based networks

Keppens, Arno; Di Pede, Serena; Hubert, Daan; Lambert, Jean-Christopher; Veefkind, Pepijn; Sneep, Maarten; De Haan, Johan; Ter Linden, Mark; Leblanc, Thierry; Compernolle, Steven; Verhoelst, Tijl; Granville, José; Nath, Oindrila; Fjæraa, Ann Mari; Boyd, Ian; Niemeijer, Sander; Van Malderen, Roeland; Smit, Herman G. J.; Duflot, Valentin; Godin-Beekmann, Sophie; Johnson, Bryan J.; Steinbrecht, Wolfgang; Tarasick, David W.; Kollonige, Debra E.; Stauffer, Ryan M.; Thompson, Anne M.; Dehn, Angelika; Zehner, Claus

The Sentinel-5 Precursor (S5P) satellite operated by the European Space Agency has carried the TROPOspheric Monitoring Instrument (TROPOMI) on a Sun-synchronous low-Earth orbit since 13 October 2017. The S5P mission has acquired more than 5 years of TROPOMI nadir ozone profile data retrieved from the level 0 to 1B processor version 2.0 and the level 1B to 2 optimal-estimation-based processor version 2.4.0. The latter is described in detail in this work, followed by the geophysical validation of the resulting ozone profiles for the period May 2018 to April 2023. Comparison of TROPOMI ozone profile data to co-located ozonesonde and lidar measurements used as references concludes to a median agreement better than 5 % to 10 % in the troposphere. The bias goes up to −15 % in the upper stratosphere (35–45 km) where it can exhibit vertical oscillations. The comparisons show a dispersion of about 30 % in the troposphere and 10 % to 20 % in the upper troposphere to lower stratosphere and in the middle stratosphere, which is close to mission requirements. Chi-square tests of the observed differences confirm on average the validity of the ex ante (prognostic) satellite and ground-based data uncertainty estimates in the middle stratosphere above about 20 km. Around the tropopause and below, the mean chi-square value increases up to about four, meaning that the ex ante TROPOMI uncertainty is underestimated. The information content of the ozone profile retrieval is characterised by about five to six vertical subcolumns of independent information and a vertical sensitivity (i.e. the fraction of the information that originates from the measurement) nearly equal to unity at altitudes from about 20 to 50 km, decreasing rapidly at altitudes above and below. The barycentre of the retrieved information is usually close to the nominal retrieval altitude in the 20–50 km altitude range, with positive and negative offsets of up to 10 km below and above this range, respectively. The effective vertical resolution of the profile retrieval usually ranges within 10–15 km, with a minimum close to 7 km in the middle stratosphere. Increased sensitivities and higher effective vertical resolutions are observed at higher solar zenith angles (above about 60°), as can be expected, and correlate with higher retrieved ozone concentrations. The vertical sensitivity of the TROPOMI tropospheric ozone retrieval is found to depend on the solar zenith angle, which translates into a seasonal and meridian dependence of the bias with respect to reference measurements. A similar although smaller effect can be seen for the viewing zenith angle. Additionally, the bias is negatively correlated with the surface albedo for the lowest three ozone subcolumns (0–18 km), despite the albedo's apparently slightly positive correlation with the retrieval degrees of freedom in the signal. For the 5 years of TROPOMI ozone profile data that are available now, an overall positive drift is detected for the same three subcolumns, while a negative drift is observed above (24–32 km), resulting in a negligible vertically integrated drift.

2024

50 Human Hazard Assessment of Nanomaterials: Supporting Risk Decision Making Through Interlaboratory Trial Data

Burgum, Michael J.; El Yamani, Naouale; Longhin, Eleonora Marta; Mariussen, Espen; Rundén-Pran, Elise; Sosnowska, Anita; Puzyn, Tomasz; Clift, Martin J. D.; Dusinska, Maria; Doak, Shareen H.

Oxford University Press

2023

A 6-year analysis of stratospheric intrusions and their influence on ozone at Mt. Cimone (2165 m above sea level).

Cristofanelli, P.; Bonasoni, P.; Tositti, L.; Bonafè, U.; Calzolari, F.; Evangelisti, F.; Sandrini, S.; Stohl, A.

2006

A Bad Start in Life? Maternal Transfer of Legacy and Emerging Poly- And Perfluoroalkyl Substances to Eggs in an Arctic Seabird.

Jouanneau, William; Leándri-Breton, Don-Jean; Corbeau, Alexandre; Herzke, Dorte; Moe, Børge; Nikiforov, Vladimir; Gabrielsen, Geir W.; Chastel, Olivier

2021

A benchmarking tool to screen and compare bottom-up and top-down atmospheric emission inventories.

Guevara, M.; Lopez-Aparicio, S.; Cuvelier, C.; Tarrasón, L.; Clappier, A.; Thunis, P.

2017

Publikasjon
År
Kategori