Mercury flux over West Antarctic Seas during winter, spring and summer

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Sökning: L773:0304 4203 > (2015-2019) > Mercury flux over W...

Nerentorp, Michelle,1986Chalmers tekniska högskola,Chalmers University of Technology (författare)

Mercury flux over West Antarctic Seas during winter, spring and summer

Artikel/kapitelEngelska2017

Förlag, utgivningsår, omfång ...

Elsevier BV,2017

Nummerbeteckningar

LIBRIS-ID:oai:research.chalmers.se:3e714ce1-eb11-4cc3-ac92-6b2acd05dd99
https://doi.org/10.1016/j.marchem.2016.08.005DOI
https://research.chalmers.se/publication/250776URI
https://urn.kb.se/resolve?urn=urn:nbn:se:ivl:diva-3737URI

Kompletterande språkuppgifter

Språk:engelska
Sammanfattning på:engelska

Ingår i deldatabas

SwePubSwePub

Klassifikation

Ämneskategori:art swepub-publicationtype
Ämneskategori:ref swepub-contenttype

Anmärkningar

A-rapport, A2261
For the first time elemental mercury in air and surface seawater was measured continuously in the remote seas of western Antarctica. A major contributor to atmospheric emissions of the toxic and globally dispersed pollutant mercury is the re-evasion from water surfaces, due to a supersaturation of dissolved gaseous mercury (DGM) in surface water. In this study the degree of saturation and mercury flux at the air-sea surface interface have been estimated from continuous measurements of gaseous elemental mercury (GEM) or total gaseous mercury (TGM) in air, DGM in surface water and meteorological parameters. The measurements were performed during winter and spring (2013) in the Weddell Sea and during summer (2010/2011) in the Bellingshausen, Amundsen and Ross Seas, and show spatial and seasonal variations. The average DGM concentration in surface water in open sea was highest during spring (12 +/- 7pg L-1) and lowest during summer (7 +/- 6.8 pg L-1), resulting in a net evasion of mercury during spring (1.1 +/- 1.6 ng m(-2)h(-1)) and a net deposition during summer (-0.2 +/- 1.3 ng m(-2)h(-1)). In open sea, higher average concentrations of GEM (or TGM) and DGM were found close to the Drake Passage compared to in the Bellingshausen and Weddell Seas. Emission sources from the South American continent, identified with back trajectories, were suggested to explain the observed variations. The yearly mercury evasion from open sea surfaces in the Southern Ocean was estimated to 30 ( -450-1700) tons, using the average (and min and max) flux rates obtained in this study. Higher DGM was measured under sea ice (19-62 pg L-1 compared to in open sea due to a capsuling effect, resulting in a theoretical prevented evasion of 520 (0-3400) tons per year. Diminishing sea ice and higher water temperatures in polar regions could result in increased mercury evasion to the atmosphere. However, the contribution of the Southern Ocean to the global modeled annual emissions of mercury from sea surfaces would probably only be a few percent.

Ämnesord och genrebeteckningar

NATURVETENSKAP Geovetenskap och miljövetenskap Miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Environmental Sciences hsv//eng
Mercury flux
Seasonal variation
Dissolved gaseous mercury
Degree of saturation

Biuppslag (personer, institutioner, konferenser, titlar ...)

Gårdfeldt, Katarina,1959Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)katarina (författare)
Langer, Sarka,1960IVL Svenska Miljöinstitutet(Swepub:ivl)P010239 (författare)
IVL Svenska MiljöinstitutetChalmers tekniska högskola (creator_code:org_t)

Sammanhörande titlar

Ingår i:Marine Chemistry: Elsevier BV193, s. 44-540304-42031872-7581

Internetlänk

Hitta via bibliotek

Marine Chemistry (Sök värdpublikationen i LIBRIS)

Till lärosätets databas

Hitta mer i SwePub

Av författaren/redakt...: Nerentorp, Miche ...; Gårdfeldt, Katar ...; Langer, Sarka, 1 ...

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Miljövetenskap

Artiklar i publikationen: Marine Chemistry

Av lärosätet: Chalmers tekniska högskola; IVL Svenska Miljöinstitutet

Sök utanför SwePub

Sök vidare i:: Google; Google Book Search; Google Scholar

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.

LIBRIS.kb.se