Matches in SemOpenAlex for { <https://semopenalex.org/work/W4256596120> ?p ?o ?g. }
Showing items 1 to 85 of
85
with 100 items per page.
- W4256596120 abstract "Abstract. The tundra plays a pivotal role in the Arctic mercury (Hg) cycling by storing atmospheric Hg deposition and shuttling it to the Arctic Ocean. A recent study revealed that 70 % of the atmospheric Hg deposition to the tundra occurs by gaseous elemental mercury (GEM or Hg(0)) uptake by vegetation and soils. Processes controlling land – atmosphere exchange of Hg(0) in the Arctic tundra are therefore central, but remain understudied. Here, we combine Hg stable isotope analysis of Hg(0) in the atmosphere, interstitial snow and soil pore air, with Hg(0) flux measurements in a tundra ecosystem at Toolik field station in northern Alaska (USA). In dark winter months, planetary boundary layer (PBL) conditions and Hg(0) concentrations were generally stable throughout the day and small Hg(0) net deposition occurred. In spring, halogen-induced atmospheric mercury depletion events (AMDE's) occurred, with fast re-emission of Hg(0) after AMDE's resulting in net emission fluxes of Hg(0). During the short snow-free growing season in summer, vegetation uptake of atmospheric Hg(0) enhanced atmospheric Hg(0) net deposition to the Arctic tundra. At night, when PBL conditions were stable, ecosystem uptake of atmospheric Hg(0) led to a depletion of atmospheric Hg(0). The night time decline of atmospheric Hg(0) was concomitant with a depletion of lighter Hg(0) isotopes in the atmospheric Hg pool. The enrichment factor, ε202Hg = −4.2 ‰ ± 1.0 ‰ was consistent with the preferential uptake of light Hg(0) isotopes by vegetation. Hg(0) flux measurements indicated a partial re-emission of Hg(0) during daytime, when solar radiation was strongest. Hg(0) concentrations in soil pore air were depleted relative to atmospheric Hg(0) concentrations, concomitant with an enrichment of lighter Hg(0) isotopes in the soil pore air (ε202Hgsoilair-atmosphere = −1.00 ‰ (±0.25 ‰) and E199Hgsoilair-atmosphere = 0.07 ‰ (±0.04 ‰)). These first Hg stable isotope measurements of Hg(0) in soil pore air are consistent with the fractionation previously observed during Hg(0) oxidation by natural humic acids suggesting abiotic oxidation as a cause for observed soil Hg(0) uptake." @default.
- W4256596120 created "2022-05-12" @default.
- W4256596120 creator A5013269932 @default.
- W4256596120 creator A5016422700 @default.
- W4256596120 creator A5029898699 @default.
- W4256596120 creator A5030397540 @default.
- W4256596120 creator A5035038265 @default.
- W4256596120 date "2019-06-21" @default.
- W4256596120 modified "2023-09-27" @default.
- W4256596120 title "Insights from mercury stable isotopes on terrestrial – atmosphere exchange of Hg(0) in the Arctic tundra" @default.
- W4256596120 doi "https://doi.org/10.5194/bg-2019-225" @default.
- W4256596120 hasPublicationYear "2019" @default.
- W4256596120 type Work @default.
- W4256596120 citedByCount "0" @default.
- W4256596120 crossrefType "posted-content" @default.
- W4256596120 hasAuthorship W4256596120A5013269932 @default.
- W4256596120 hasAuthorship W4256596120A5016422700 @default.
- W4256596120 hasAuthorship W4256596120A5029898699 @default.
- W4256596120 hasAuthorship W4256596120A5030397540 @default.
- W4256596120 hasAuthorship W4256596120A5035038265 @default.
- W4256596120 hasBestOaLocation W42565961201 @default.
- W4256596120 hasConcept C107872376 @default.
- W4256596120 hasConcept C110872660 @default.
- W4256596120 hasConcept C111368507 @default.
- W4256596120 hasConcept C114793014 @default.
- W4256596120 hasConcept C121332964 @default.
- W4256596120 hasConcept C125069764 @default.
- W4256596120 hasConcept C127313418 @default.
- W4256596120 hasConcept C153294291 @default.
- W4256596120 hasConcept C185592680 @default.
- W4256596120 hasConcept C18903297 @default.
- W4256596120 hasConcept C197046000 @default.
- W4256596120 hasConcept C199360897 @default.
- W4256596120 hasConcept C2777777548 @default.
- W4256596120 hasConcept C30878456 @default.
- W4256596120 hasConcept C39432304 @default.
- W4256596120 hasConcept C41008148 @default.
- W4256596120 hasConcept C518008717 @default.
- W4256596120 hasConcept C65440619 @default.
- W4256596120 hasConcept C65680412 @default.
- W4256596120 hasConcept C86803240 @default.
- W4256596120 hasConcept C91586092 @default.
- W4256596120 hasConceptScore W4256596120C107872376 @default.
- W4256596120 hasConceptScore W4256596120C110872660 @default.
- W4256596120 hasConceptScore W4256596120C111368507 @default.
- W4256596120 hasConceptScore W4256596120C114793014 @default.
- W4256596120 hasConceptScore W4256596120C121332964 @default.
- W4256596120 hasConceptScore W4256596120C125069764 @default.
- W4256596120 hasConceptScore W4256596120C127313418 @default.
- W4256596120 hasConceptScore W4256596120C153294291 @default.
- W4256596120 hasConceptScore W4256596120C185592680 @default.
- W4256596120 hasConceptScore W4256596120C18903297 @default.
- W4256596120 hasConceptScore W4256596120C197046000 @default.
- W4256596120 hasConceptScore W4256596120C199360897 @default.
- W4256596120 hasConceptScore W4256596120C2777777548 @default.
- W4256596120 hasConceptScore W4256596120C30878456 @default.
- W4256596120 hasConceptScore W4256596120C39432304 @default.
- W4256596120 hasConceptScore W4256596120C41008148 @default.
- W4256596120 hasConceptScore W4256596120C518008717 @default.
- W4256596120 hasConceptScore W4256596120C65440619 @default.
- W4256596120 hasConceptScore W4256596120C65680412 @default.
- W4256596120 hasConceptScore W4256596120C86803240 @default.
- W4256596120 hasConceptScore W4256596120C91586092 @default.
- W4256596120 hasFunder F4320334678 @default.
- W4256596120 hasFunder F4320338335 @default.
- W4256596120 hasLocation W42565961201 @default.
- W4256596120 hasLocation W42565961202 @default.
- W4256596120 hasLocation W42565961203 @default.
- W4256596120 hasLocation W42565961204 @default.
- W4256596120 hasLocation W42565961205 @default.
- W4256596120 hasOpenAccess W4256596120 @default.
- W4256596120 hasPrimaryLocation W42565961201 @default.
- W4256596120 hasRelatedWork W2010727316 @default.
- W4256596120 hasRelatedWork W2077509071 @default.
- W4256596120 hasRelatedWork W2130664093 @default.
- W4256596120 hasRelatedWork W2170892868 @default.
- W4256596120 hasRelatedWork W2316804219 @default.
- W4256596120 hasRelatedWork W2768950443 @default.
- W4256596120 hasRelatedWork W2792271534 @default.
- W4256596120 hasRelatedWork W2909535860 @default.
- W4256596120 hasRelatedWork W3027787888 @default.
- W4256596120 hasRelatedWork W3161225881 @default.
- W4256596120 isParatext "false" @default.
- W4256596120 isRetracted "false" @default.
- W4256596120 workType "article" @default.