SwePub
Sök i LIBRIS databas

  Extended search

onr:"swepub:oai:DiVA.org:uu-221776"
 

Search: onr:"swepub:oai:DiVA.org:uu-221776" > First Ice Core Reco...

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

First Ice Core Records of NO3- Stable Isotopes from Lomonosovfonna, Svalbard

Vega, Carmen P. (author)
Uppsala universitet,Luft-, vatten- och landskapslära
Pohjola, Veijo A. (author)
Uppsala universitet,Luft-, vatten- och landskapslära
Samyn, Denis (author)
Uppsala universitet,Luft-, vatten- och landskapslära
show more...
Pettersson, Rickard (author)
Uppsala universitet,Luft-, vatten- och landskapslära
Isaksson, E. (author)
Björkman, M. P. (author)
Martma, T. (author)
Marca, A. (author)
Kaiser, J. (author)
show less...
 (creator_code:org_t)
2015
2015
English.
In: Journal of Geophysical Research - Atmospheres. - 2169-897X .- 2169-8996. ; 120:1, s. 313-330
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • Samples from two ice cores drilled at Lomonosovfonna, Svalbard, covering the period 1957-2009, and 1650-1995, respectively, were analyzed for NO(3)(-)concentrations, and NO3- stable isotopes (N-15 and O-18). Post-1950 N-15 has an average of (-6.91.9), which is lower than the isotopic signal known for Summit, Greenland but agrees with values observed in recent Svalbard snow and aerosol. Pre-1900 N-15 has an average of (4.21.6)parts per thousand suggesting that natural sources, enriched in the N-15 isotope, dominated before industrialization. The post-1950 O-18 average of (75.1 +/- 4.1)parts per thousand agrees with data from low and polar latitudes, suggesting similar atmospheric NOy (NOy=NO+NO2+HNO3) processing pathways. The combination of anthropogenic source N-15 and transport isotope effect was estimated as -29.1 parts per thousand for the last 60years. This value is below the usual range of NOx (NOx=NO+NO2) anthropogenic sources which is likely the result of a transport isotope effect of -32 parts per thousand. We suggest that the N-15 recorded at Lomonosovfonna is influenced mainly by fossil fuel combustion, soil emissions, and forest fires; the first and second being responsible for the marked decrease in N-15 observed in the post-1950s record with soil emissions being associated to the decreasing trend in N-15 observed up to present time, and the third being responsible for the sharp increase of N-15 around 2000.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Keyword

Geovetenskap med inriktning mot naturgeografi
Earth Science with specialization in Physical Geography

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

To the university's database

  • 1 of 1
  • Previous record
  • Next record
  •    To hitlist

Search outside SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view