SwePub
Sök i LIBRIS databas

  Extended search

WFRF:(Bigler Christian)
 

Search: WFRF:(Bigler Christian) > (2015-2019) > Interannual variati...

Interannual variation in seasonal diatom sedimentation reveals the importance of late winter processes and their timing for sediment signal formation

Maier, Dominique B., 1982- (author)
Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
Diehl, Sebastian (author)
Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
Bigler, Christian (author)
Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Arcum
 (creator_code:org_t)
2019-01-31
2019
English.
In: Limnology and Oceanography. - : Association for the Science of Limnology and Oceanography. - 0024-3590 .- 1939-5590. ; 64:3, s. 1186-1199
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • Disentangling the process information contained in a diatom sediment signature is crucial for reliable future predictions based on paleolimnological records. In this study, we combine limnological and paleolimnological monitoring to address the fundamental question: Which environmental information is contained in a diatom sediment signal? We compared annual diatom sequential sediment trap records with the diatom record of the annually varved lake sediment of Nylandssjon (northern Sweden) from three meteorologically different years (2012-2014). The seasonal patterns in diatom sedimentation were strikingly different in varve years 2012 and 2014 compared to varve year 2013. In 2012 and 2014, up to 70% of the annual flux occurred in a single spring month and was dominated by Cyclotella glomerata. In contrast, in 2013, peak fluxes were much lower and more annually integrated. Next, we compared the full-year diatom trap results with year round in-lake physical, chemical, and biological monitored parameters, as well as meteorological variables. Annual averages of environmental conditions did not explain the interannual variability in diatom sedimentation. Instead, the seasonality of diatom sedimentation was determined by the timing of the spring diatom bloom relative to lake over-turn in winters with warm vs. cold air temperature. With our combined limnological and paleolimnological monitoring approach, we find that an annual diatom signal can either contain primarily seasonal climate information from a short time period or be annually integrated. We synthesize our results in a novel conceptual model, which describes the response of sediment diatom signals to two distinct sequences of late-winter conditions.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

To the university's database

Find more in SwePub

By the author/editor
Maier, Dominique ...
Diehl, Sebastian
Bigler, Christia ...
About the subject
NATURAL SCIENCES
NATURAL SCIENCES
and Earth and Relate ...
and Geology
NATURAL SCIENCES
NATURAL SCIENCES
and Earth and Relate ...
and Climate Research
Articles in the publication
Limnology and Oc ...
By the university
Umeå University

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