SwePub
Sök i LIBRIS databas

  Extended search

AMNE:(NATURVETENSKAP Geovetenskap och miljövetenskap Annan geovetenskap och miljövetenskap)
 

Search: AMNE:(NATURVETENSKAP Geovetenskap och miljövetenskap Annan geovetenskap och miljövetenskap) > (2020-2024) > High spatiotemporal...

  • Roth, FlorianStockholms universitet,Stockholms universitets Östersjöcentrum (author)

High spatiotemporal variability of methane concentrations challenges estimates of emissions across vegetated coastal ecosystems.

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-04-12
  • Wiley,2022

Numbers

  • LIBRIS-ID:oai:gup.ub.gu.se/315425
  • https://gup.ub.gu.se/publication/315425URI
  • https://doi.org/10.1111/gcb.16177DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-203884URI

Supplementary language notes

  • Language:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Coastal methane (CH4 ) emissions dominate the global ocean CH4 budget and can offset the "blue carbon" storage capacity of vegetated coastal ecosystems. However, current estimates lack systematic, high-resolution, and long-term data from these intrinsically heterogeneous environments, making coastal budgets sensitive to statistical assumptions and uncertainties. Using continuous CH4 concentrations, δ13 C-CH4 values, and CH4 sea-air fluxes across four seasons in three globally pervasive coastal habitats, we show that the CH4 distribution is spatially patchy over meter-scales and highly variable in time. Areas with mixed vegetation, macroalgae, and their surrounding sediments exhibited a spatiotemporal variability of surface water CH4 concentrations ranging two orders of magnitude (i.e., 6-460nM CH4 ) with habitat-specific seasonal and diurnal patterns. We observed (1) δ13 C-CH4 signatures that revealed habitat-specific CH4 production and consumption pathways, (2) daily peak concentration events that could change >100% within hours across all habitats, and (3) a high thermal sensitivity of the CH4 distribution signified by apparent activation energies of ~1eV that drove seasonal changes. Bootstrapping simulations show that scaling the CH4 distribution from few samples involves large errors, and that ~50 concentration samples per day are needed to resolve the scale and drivers of the natural variability and improve the certainty of flux calculations by up to 70%. Finally, we identify northern temperate coastal habitats with mixed vegetation and macroalgae as understudied but seasonally relevant atmospheric CH4 sources (i.e., releasing≥100μmol CH4 m-2 day-1 in summer). Due to the large spatial and temporal heterogeneity of coastal environments, high-resolution measurements will improve the reliability of CH4 estimates and confine the habitat-specific contribution to regional and global CH4 budgets.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Sun, XiaoleStockholms universitet,Stockholms universitets Östersjöcentrum (author)
  • Geibel, Marc CStockholms universitet,Stockholms universitets Östersjöcentrum (author)
  • Prytherch, JohnStockholms universitet,Meteorologiska institutionen (MISU) (author)
  • Brüchert, VolkerStockholms universitet,Institutionen för geologiska vetenskaper (author)
  • Bonaglia, Stefano,1983Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences,Department of Marine Sciences, University of Gothenburg(Swepub:gu)xbonst (author)
  • Broman, EliasStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)elbr2874 (author)
  • Nascimento, FranciscoStockholms universitet,Institutionen för ekologi, miljö och botanik (author)
  • Norkko, AlfTvärminne Zoological Station, University of Helsinki (author)
  • Humborg, ChristophStockholms universitet,Stockholms universitets Östersjöcentrum (author)
  • Stockholms universitetStockholms universitets Östersjöcentrum (creator_code:org_t)

Related titles

  • In:Global change biology: Wiley28:14, s. 4308-43221365-24861354-1013

Internet link

Find in a library

To the university's database

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