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Climate-driven landscape development

physical and biogeochemical long-term processes in temperate and periglacial environments

Lindborg, Tobias (2017). Climate-driven landscape development. Diss. (sammanfattning/summary) Umeå, Sverige : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2017:79
ISBN 978-91-7760-038-1
eISBN 978-91-7760-039-8
[Doctoral thesis]

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Abstract

Earth has experienced many glacial cycles over the ̴ 2.5 million year long Quaternary period. During the latter part of the Quaternary, roughly the last 800,000 years, each cycle has been of duration ̴ 100,000 years and has included extended periods of glacial conditions, with ice sheets in the northern hemisphere. In-between those periods, intervals with periglacial or temperate conditions in northern latitudes have occurred. Global sea level has, as a response to the formation and melting of ice sheets, fluctuated over 120 meters. Thus, the global climate cycles have been the main driver for the location of continental coastlines, environmental changes in the past as well as the resulting present-day landscapes. Recent human-induced climate change is now also affecting the landscape.
In this thesis, I examine the use of global climate models as input to exploring local landscape evolution over glacial cycles. An approach is proposed for landscape description that is designed for use in long-term safety assessments related to landscape development into the far future. The approach is illustrated by results of work that shows methods applied to a site-specific landscape development model using climate and climate-related data. Site-specific data is utilised to gain site understanding from which conceptual ecosystem models are developed for present day conditions, and to inform landscape narratives. Concentrations of elements are used to infer the characteristics of transport processes in the landscape over time. The results from the above studies are discussed in relation to the general hypothesis in this thesis; that by considering a few well-defined climate-related processes and using site understanding on local properties and processes, it is possible to reduce the uncertainties in future landscape developments for a specific site. Uncertainties include the abundance and distribution of ecosystems and associated properties related to processes governing the transport of matter. I conclude that relevant examples of historical and future landscape evolution for specific sites can be given that are useful for long-term assessments.

Authors/Creators:Lindborg, Tobias
Title:Climate-driven landscape development
Subtitle:physical and biogeochemical long-term processes in temperate and periglacial environments
Alternative abstract:
LanguageAbstract
Swedish

Under Kvartärperioden, d.v.s. de senaste 2,5 miljoner åren, har jorden genomgått flera glaciala cykler. Varje cykel har under de senaste 800 000 åren varit ca 100 000 år lång. Cyklerna har haft långa glaciala perioder med inlandsisar på det norra halvklotet. Mellan dessa glaciala perioder har varmare perioder med temperat klimat förekommit, som avbrutits av kallare periglaciala tundraklimat. Den globala havsnivån har som en respons på dessa glaciala cykler fluktuerat med mer än 120 meter. De globala klimatcyklerna har varit den huvudsakliga drivkraften bakom läget för kontinenternas strandlinjer, historiska miljöförändringar samt det landskap vi ser i dag. Den i detta sammanhang nyligen uppkomna antropogena påverkan i form av utsläpp av fossilt kol ska adderas till detta historiska mönster. Alla platser på jordytan är under konstant förändring, dels på grund av ovan beskrivna processer, dels fluviala och andra lokala processer. I denna avhandling undersöker jag hur globala klimatmodeller kan användas som indata till platsspecifika landskapsutvecklingsmodeller. Vidare så redovisas metodik och resultat från en platsspecifik landskapsmodell som använder klimatdata och klimatrelaterade data från en klimatmodell. Möjliga framtida platsspecifika landskap underbyggs med platsspecifika data och massbalansmodeller. Transportprocesser i landskapet över tid beskrivs med hjälp av koncentrationer för ett stort antal grundämnen. Resultatet diskuteras och stödjer avhandlingens tes; att med hjälp av ett fåtal väldefinierade klimatrelaterade processer, tillsammans med information om platsegenskaper och lokala processer, kan man minska de osäkerheter som finns i beskrivningar av framtida landskapsutvecklingar. Osäkerheter så som förekomst och distribution av ekosystem samt processer som styr ämnestransport i landskapet. Vidare så visar jag att relevanta exempel på historiska och framtida landskapsutvecklingar för specifika platser kan tas fram som är användbara vid långsiktiga bedömningar av platsegenskaper och elementtransport. Jag avslutar vidare med att konstatera att globala klimatscenarier tillsammans med platsförståelse är nyckelkomponenter i framtagandet av landskaps-beskrivningar för framtiden.

Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2017
Depositing date:30 August 2017
Volume:2017:79
Number:2017:79
Number of Pages:81
Papers/manuscripts:
NumberReferences
1Becker, J.K., Lindborg T. & Thorne M.C*. (2014). Influence of climate on landscape characteristics in safety assessments of repositories for radioactive wastes. Journal of Environmental Radioactivity, vol. 138, pp. 192-204.
2Lindborg, T*., Brydsten, L., Sohlenius, G., Strömgren, M., Andersson, E. & Löfgren, A. (2013). Landscape development during a glacial cycle: modelling ecosystems from the past into the future. AMBIO, vol. 42, pp. 402-413.
3Lindborg, T*., Rydberg, J., Tröjbom, M., Berglund, S., Johansson, E., Löfgren, A., Saetre, P., Nordén, S., Sohlenius, G., Andersson, E., Petrone, J., Borgiel, M., Kautsky, U. & Laudon, H. (2016). Biogeochemical data from terrestrial and aquatic ecosystems in a periglacial catchment, West Greenland. Earth System Science Data, vol. 8, pp. 439-459.
4Rydberg, J*., Lindborg, T., Solenius, G., Reuss, N., Olsen, J. & Laudon, H. (2016). The importance of eolian input on lake sediment geochemical composition in the dry proglacial landscape of western Greenland. Arctic, Antarctic and Alpine Research, vol. 48, pp. 93– 109.
5Lindborg, T*., Rydberg, J., Andersson, E., Löfgren, A., Johansson, E., Saetre, P., Sohlenius, G., Berglund, S., Kautsky, U. & Laudon, H. (submitted). Terrestrial and Aquatic Pools and Fluxes in a Periglacial Landscape: Carbon Budget Analysis for a Catchment in West Greenland.
6Lindborg, T*., Rydberg, J., Lidman, F., Tröjbom, M., Berglund, S., Johansson, E., Kautsky, U. & Laudon, H. (manuscript). Mass-balance of 42 elements in a periglacial lake catchment in West Greenland.
Place of Publication:Umeå, Sverige
Publisher:Department of Forest Ecology and Management, Swedish Univerity of Agricultural Sciences
ISBN for printed version:978-91-7760-038-1
ISBN for electronic version:978-91-7760-039-8
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M40 Aquatic ecology
P Natural resources > P33 Soil chemistry and physics
P Natural resources > P40 Meteorology and climatology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geosciences, Multidisciplinary
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:landscape, biogeochemical cycle, climate change, catchment areas, ecosystems, erosion, geology, ice, permafrost areas
Keywords:Landscape development, biogeochemistry, climate, environmental change, catchment, ecosystem, mass-balance, organic carbon, shoreline displacement, permafrost
URN:NBN:urn:nbn:se:slu:epsilon-e-4319
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4319
ID Code:14530
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
External funders:Swedish Nuclear Fuel and Waste Management Company
Deposited By: Tobias Lindborg
Deposited On:31 Aug 2017 13:51
Metadata Last Modified:30 Oct 2017 23:18

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