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Vorlandflächen als Senke von Sedimenten und Schadstoffen : Voruntersuchungen (2012)

Heuner, Maike [VerfasserIn]

Koblenz : bfg Bundesanstalt für Gewässerkunde, KLIWAS-Koordination

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Keywords: Forschungsbericht ; Elbe ; Weser ; Ästuar ; Vorland ; Sediment ; Schadstoffbelastung ; Röhricht

Type of Medium: Online Resource

Pages: 1 Online-Ressource (92 Seiten, 4.328 kB) , Illustrationen, Diagramme, Karten

Edition: Version 1.0

Series Statement: KLIWAS Schriftenreihe 4

URL: https://edocs.tib.eu/files/e01fn16/872697517.pdf

URL: https://doi.org/10.5675/Kliwas_4.2012_Vorlandflaechen

DOI: 10.5675/Kliwas_4.2012_Vorlandflaechen

Language: German

Note: SAP-Nr.: M39630305309 , Literaturverzeichnis: Seite 52-53

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Klimabedingte Änderung der Vorlandvegetation und ihrer Funktionen in Ästuaren sowie Anpassungsoptionen für die Unterhaltung : Schlussbericht KLIWAS-Projekt 3.09 (2014)

Bauer, Eva-Maria [VerfasserIn]

Koblenz : bfg Bundesanstalt für Gewässerkunde, KLIWAS Koordination

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Keywords: Forschungsbericht ; Klimaänderung ; Ästuar ; Vorland ; Vegetation

Type of Medium: Online Resource

Pages: 1 Online-Ressource (64 Seiten, 14.0 MB) , Illustrationen, Diagramme

Series Statement: KLIWAS Schriftenreihe 24

URL: https://edocs.tib.eu/files/e01fn16/872501205.pdf

URL: https://doi.org/10.5675/Kliwas_24/2014_3.09

DOI: 10.5675/Kliwas_24/2014_3.09

Language: English

Note: Literaturverzeichnis: Seite 37-46

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Comparison of surface mass balance of ice sheets simulated by positive-degree-day method and energy balance approach (2017)

Bauer, Eva ; Ganopolski, Andrey

Copernicus Publications (EGU)

In: Climate of the Past, 13 (7). pp. 819-832.

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Publication Date: 2020-02-06

Description: Glacial cycles of the late Quaternary are controlled by the asymmetrically varying mass balance of continental ice sheets in the Northern Hemisphere. Surface mass balance is governed by processes of ablation and accumulation. Here two ablation schemes, the positive-degree-day (PDD) method and the surface energy balance (SEB) approach, are compared in transient simulations of the last glacial cycle with the Earth system model of intermediate complexity CLIMBER-2. The standard version of the CLIMBER-2 model incorporates the SEB approach and simulates ice volume variations in reasonable agreement with paleoclimate reconstructions during the entire last glacial cycle. Using results from the standard CLIMBER-2 model version, we simulated ablation with the PDD method in offline mode by applying different combinations of three empirical parameters of the PDD scheme. We found that none of the parameter combinations allow us to simulate a surface mass balance of the American and European ice sheets that is similar to that obtained with the standard SEB method. The use of constant values for the empirical PDD parameters led either to too much ablation during the first phase of the last glacial cycle or too little ablation during the final phase. We then substituted the standard SEB scheme in CLIMBER-2 with the PDD scheme and performed a suite of fully interactive (online) simulations of the last glacial cycle with different combinations of PDD parameters. The results of these simulations confirmed the results of the offline simulations: no combination of PDD parameters realistically simulates the evolution of the ice sheets during the entire glacial cycle. The use of constant parameter values in the online simulations leads either to a buildup of too much ice volume at the end of glacial cycle or too little ice volume at the beginning. Even when the model correctly simulates global ice volume at the last glacial maximum (21 ka), it is unable to simulate complete deglaciation during the Holocene. According to our simulations, the SEB approach proves superior for simulations of glacial cycles.

Type: Article , PeerReviewed

Format: text

DOI: 10.5194/cp-13-819-2017

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OceanRep: Article in a Scientific Journal - peer-reviewed

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