Found 9849 publications. Showing page 293 of 394:
This report presents the results of the European Union Action
on Black Carbon in the Arctic (EUA-BCA) initiative’s review of
observation capacities and data availability for black carbon in the Arctic region.
EUA-BCA/AMAP
2019
2019
Recent Trends in Stratospheric Chlorine From Very Short-Lived Substances
Very short‐lived substances (VSLS), including dichloromethane (CH2Cl2), chloroform (CHCl3), perchloroethylene (C2Cl4), and 1,2‐dichloroethane (C2H4Cl2), are a stratospheric chlorine source and therefore contribute to ozone depletion. We quantify stratospheric chlorine trends from these VSLS (VSLCltot) using a chemical transport model and atmospheric measurements, including novel high‐altitude aircraft data from the NASA VIRGAS (2015) and POSIDON (2016) missions. We estimate VSLCltot increased from 69 (±14) parts per trillion (ppt) Cl in 2000 to 111 (±22) ppt Cl in 2017, with >80% delivered to the stratosphere through source gas injection, and the remainder from product gases. The modeled evolution of chlorine source gas injection agrees well with historical aircraft data, which corroborate reported surface CH2Cl2 increases since the mid‐2000s. The relative contribution of VSLS to total stratospheric chlorine increased from ~2% in 2000 to ~3.4% in 2017, reflecting both VSLS growth and decreases in long‐lived halocarbons. We derive a mean VSLCltot growth rate of 3.8 (±0.3) ppt Cl/year between 2004 and 2017, though year‐to‐year growth rates are variable and were small or negative in the period 2015–2017. Whether this is a transient effect, or longer‐term stabilization, requires monitoring. In the upper stratosphere, the modeled rate of HCl decline (2004–2017) is −5.2% per decade with VSLS included, in good agreement to ACE satellite data (−4.8% per decade), and 15% slower than a model simulation without VSLS. Thus, VSLS have offset a portion of stratospheric chlorine reductions since the mid‐2000s.
American Geophysical Union (AGU)
2019
2019
Exploring the prospects for adaptive governance in marine transboundary conservation in East Africa
Elsevier
2019
2019
2019
2019
Screening program 2018. Volatiles, Gd, BADGE, UV filters, Additives, and Medicines.
Dette screeningprosjektet har hovedfokuset på forekomst og miljøpåvirkning av et utvalg PBT. Prøver av inneluft, husstøv, overflate- og avløpsvann samt sediment og biota fra indre Oslofjord inngår i prosjektet. Noen av de detekterte stoffer bør følges opp. Et UV-filter viser seg å være potensielt miljøfarlig.
NILU
2019
NILU’s Environmental Management Report 2018
Et av NILUs hovedmål er å studere forurensning og konsekvenser av forurensning og gi beslutningstakere en solid plattform for valg av tiltak for å redusere negative effekter. Det er også viktig for instituttet å ha kontroll på miljøkonsekvenser av instituttets aktiviteter og redusere negative effekter så langt som mulig. NILU har i mange år arbeidet for å forbedre miljøtilstanden og redusere negative miljøeffekter. Det ble derfor bestemt å sertifisere dette arbeidet i henhold til standarden ISO 14001:2004 – Sertifisering av miljøstyringssystem. NILU ble sertifisert i henhold til ISO 14001 i oktober 2010. Denne rapporten oppsummerer resultatene av miljøstyringssystemet i 2018.
NILU
2019
Socioeconomic position, lifestyle habits and biomarkers of epigenetic aging: A multi-cohort analysis
2019
Academic Press
2019
2019
2019
2019
2019