Publikasjoner

Synergistic exploitation of the methane product from Sentinel-SP for applications in the Arctic (STEPS)

Stebel, Kerstin; Kylling, Arve; Schneider, Philipp; Ytre-Eide, Martin

The main goal of this feasibility study was to evaluate the potential of adding value to the Sentinel 5P TROPOMI methane product over Norway and the Arctic through the synergistic use of relevant observations from other Sentinel satellites and machine learning. We assessed the data availability of ESA operational and research-based WFMD XCH4 products over the Northern hemisphere, the Nordic countries and the Arctic/Northern latitudes. ESA’s XCH4 data have poor coverage over Norway. Seeing the two datasets as complementary, seems to be the most reasonable approach for utilization them. Furthermore, we investigated potential synergies between satellite products from different platforms. A random forest (RF) machine learning algorithm was implemented. It shows the importance of daytime land surface temperature (LST) as predictor variable for CH4. Our results indicate that the RF-model has a very good capability of filling small gaps in the data.

NILU

Synoptic conditions in the Arctic and their relationship to transport into the Arctic. NILU F

Stohl, A.

Syntetiske muskforbindelser - til glede eller sorg? Sammendrag. NILU F

Kallenborn, R.

Synthesis, enantioselective separation of Photocyclodienes and their prevalence in ringed seal liver samples.

Hühnerfuss, H.; Bethan, B.; Kallenborn, R.

Synthetic musks in ambient and indoor air. Handbook of environmental chemistry. Vol. 3, Anthropogenic compounds, pt. X

Kallenborn, R.; Gatermann, R.

Synthetic musks in Norwegian marine fish samples collected in the vicinity of densely populated areas.

Kallenborn, R.; Gatermann, R.; Nygård, T.; Knutzen, J.; Schlabach, M.

Sysav Malmö - CCS Waste-to-Energy. A Worst Case / Likely Case study of amines, nitramines and nitrosamines.

Berglen, Tore Flatlandsmo; Tønnesen, Dag; Markelj, Miha; Solberg, Sverre; Svendby, Tove Marit

NILU

System for practical implementation of EU-directives in Norway. NILU F

Endregard, G.

T5.1: Data management Plan (DMP) progress and data gathered

Aas, Wenche; Fiebig, Markus; Myhre, Cathrine Lund

TAG nitrogen and sulphur flux measurements supported by the EMEP deposition module. Powerpoint presentation. NILU F

Hole, L.R.

Taking the temperature of Earth: Variability, trends and applications of observed surface temperature data across all domains of Earth's surface.

Lenters, J.; Hook, S.; Read, J.; Gray, D.; Hampton, S.; McIntyre, P.; O'Reilly, C.; Schneider, P.; Sharma, S.; GLTC Contributors.

Targeted PFAS analyses and Extractable Organofluorine – Enhancing our Understanding of the presence of unknown PFAS in Norwegian wildlife

Herzke, Dorte; Nikiforov, Vladimir; Yeung, Leo WY.; Moe, Børge; Routti, Heli Anna Irmeli; Nygård, Torgeir; Gabrielsen, Geir W.; Hanssen, Linda

With the current possible presence of thousands of PFAS compounds in industrial emissions, there is an increasing need to assess the impacts of PFAS regulation of conventional PFAS on one hand and the exposure to emerging and yet unknown PFAS on the other. Today’s analytical methodologies using targeted approaches are not sufficient to determine the complete suite of PFAS present. To evaluate the presence of unknown PFAS, we investigated in this study the occurrence of an extended range of target PFAS in various species from the marine and terrestrial Norwegian environment, in relation to the extractable organic fluorine (EOF), which yields the total amount of organic fluorine. The results showed a varying presence of extractable fluorinated organics, with glaucous gull eggs, otter liver and polar bear plasma showing the highest EOF and a high abundance of PFAS as well. The targeted PFAS measurements explained 1% of the organic fluorine for moose liver as the lowest and 94% for otter liver as the highest. PFCAs like trifluoro acetic acid (TFA, reported semi-quantitatively), played a major role in explaining the organic fluorine present. Emerging PFAS as the perfluoroethylcyclohexane sulfonate (PFECHS), was found in polar bear plasma in quantifiable amounts for the first time, confirming earlier detection in arctic species far removed from emission sources. To enable a complete organic fluorine mass balance in wildlife, new approaches are needed, to uncover the presence of new emerging PFAS as cyclic- or ether PFAS together with chlorinated PFAS as well as fluorinated organic pesticides and pharmaceuticals.

Elsevier