Project

Back to overview

Exploring VNIR/SWIR Hyperspectral Imaging of Varved Lake Sediments: Methods and Applications in Paleoclimatology and Paleoecology

English title Exploring VNIR/SWIR Hyperspectral Imaging of Varved Lake Sediments: Methods and Applications in Paleoclimatology and Paleoecology
Applicant Grosjean Martin
Number 172586
Funding scheme Project funding (Div. I-III)
Research institution Oeschger-Zentrum für Klimaforschung Universität Bern
Institution of higher education University of Berne - BE
Main discipline Other disciplines of Environmental Sciences
Start/End 01.07.2017 - 30.06.2021
Approved amount 522'969.00
Show all

All Disciplines (4)

Discipline
Other disciplines of Environmental Sciences
Other disciplines of Earth Sciences
Hydrology, Limnology, Glaciology
Climatology. Atmospherical Chemistry, Aeronomy

Keywords (7)

Hypoxia; hyperspectral imaging; limnogeology; climate change; varves ; paleoclimatology; Holocene

Lay Summary (German)

Lead
Die globale Klimaerwärmung und Intensivierung von Nährstoffkreisläufen führt weltweit zu einer dramatischen Verbreitung von anoxischen Bedingungen in Flüssen, Seen und Ozeanen. Dies hat ernsthafte Konsequenzen auf Wasserqualität und Biodiversität. Wenig ist bekannt, wann und weshalb über längere Zeitspannen anoxische Bedingungen in Seen entstanden und wieder verschwunden sind. Das Hauptproblem besteht darin, dass Messmethoden für entsprechende Indikatoren (zBsp Pigmente) sehr aufwändig sind. Neuartige hyperspektrale Bildanalyseverfahren im visiblen und nahen Infrarot Bereich (VNIR 400 - 1000 nm) eröffnen neue Perspektiven zur quantitativen Analyse von diagnostischen Photopigmenten in Seesedimenten.
Lay summary

Das Projekt verfolgt die Weiterentwicklung der hyperspektralen Bildverarbeitung im VNIR Bereich (400 - 1000 nm) und deren Anwendungen auf Sedimente aus unterschiedlichen Seetypen. Bei der Methodenentwicklung steht die Identifikation und Kalibrierung verschiedener diagnostischer Substanzen (Pigmente, Mineralien) in der komplexen Sedimentmatrix im Vordergrund. Besonders interessant sind Karotenoide und Chlorine als Indikatoren für die Produktivität verschiedener oxischer und anoxischer Algengruppen, die Trennung von Chlorophyll und den Abbauprodukten als Indikatoren der Diagenese, sowie verschiedene Mineralien, die in unterschiedlichen physikalischen und chemischen Bedingungen im See gebildet werden. So lassen sich in sehr hoher räumlicher (40 µm Pixelgrösse) und zeitlicher Auflösung (20-50 Datenpunkte pro Jahr) Redoxbedingungen, Primärproduktion sowie Bodenerosion etc. über tausende von Jahren in Seesedimenten rekonstruieren. Ausserdem wird versucht, den Fingerabdruck von atmosphärischen Phänomenen auf der meteorologischen Skala (Paleo-Wetter) in Seesedimenten zu identifizieren.

Im Projekt untersuchen wir jährlich laminierte Seen im schweizerischen Mittelland (Moossee, Burgäschisee), in den Alpen (Cadagnosee) und in der Masurischen Seenplatte (Polen). Diese Seen erlauben uns einen Blick über die letzten 18‘000 Jahre. Wir testen die Methodik ebenfalls für Sedimente aus den subantarktischen Inseln und aus dem Viktoriasee in Ostafrika.
Direct link to Lay Summary Last update: 24.05.2017

Responsible applicant and co-applicants

Employees

Publications

Publication
20,000 years of interactions between climate, vegetation and land use in Northern Greece
Gassner Sylvia, Gobet Erika, Schwörer Christoph, van Leeuwen Jacqueline, Vogel Hendrik, Giagkoulis Tryfon, Makri Stamatina, Grosjean Martin, Panajiotidis Sampson, Hafner Albert, Tinner Willy (2020), 20,000 years of interactions between climate, vegetation and land use in Northern Greece, in Vegetation History and Archaeobotany, 29, 75-90.
Phosphorus fractions in sediments and their relevance for historical lake eutrophication in the Ponte Tresa basin (Lake Lugano, Switzerland) since 1959
Tu Luyao, Jarosch Klaus A., Schneider Tobias, Grosjean Martin (2019), Phosphorus fractions in sediments and their relevance for historical lake eutrophication in the Ponte Tresa basin (Lake Lugano, Switzerland) since 1959, in Science of The Total Environment, 685, 806-817.
Holocene dynamics of the Southern Hemisphere westerly winds and possible links to CO2 outgassing
Saunders Krystyna M., Roberts Stephen J., Perren Bianca, Butz Christoph, Sime Louise, Davies Sarah, Van Nieuwenhuyze Wim, Grosjean Martin, Hodgson Dominic A. (2018), Holocene dynamics of the Southern Hemisphere westerly winds and possible links to CO2 outgassing, in Nature Geoscience, 11(9), 650-655.
Miniature radiocarbon measurements (< 150 μg C) from sediments of Lake Żabińskie, Poland: effect of precision and dating density on age-depth models
ZanderPaul D., SzidatSönke, KaufmannDarrell S., ZarczynskiMaurycy, Poraj-GorskaAnna, Bolthauser-KaltenriePetra, GrosjeanMartin, Miniature radiocarbon measurements (< 150 μg C) from sediments of Lake Żabińskie, Poland: effect of precision and dating density on age-depth models, in Geochronology.

Collaboration

Group / person Country
Types of collaboration
Quaternary geology and paleoclimatology; Northern Arizona University United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Centre d'hydrogéologie et géothermie, U Neuchatel Switzerland (Europe)
- Publication
Climate System Research Center; University of Massachusetts United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
British Sedimentological Research Group Meeting BSRG AGM Talk given at a conference Historical eutrophication history and long-term phosphorus fractions retention from sediments in LakeBurgäschi(Switzerland) since the early 1900s 14.12.2019 London, Great Britain and Northern Ireland Grosjean Martin; Zander Paul;
British Sedimentological Research Group Meeting BSRG AGM Talk given at a conference Late Glacial-Holocene high resolution records of productivity and meromixis from varved lake sediments across Europe: methods and applications 14.12.2019 London, Great Britain and Northern Ireland Grosjean Martin;
Swiss Geoscience Meeting Poster Investigating meromixis dynamics in varved lake sediments of Lake Jaczno, Poland using high-resolution hyperspectral imaging and XRF data. 23.11.2019 Fribourg, Switzerland Grosjean Martin;
Swiss Geoscience Meeting Poster What controls long-term phosphorus fractions retention in deep-lake sediments: lake primary productivity or lake mixing regime? 23.11.2019 Fribourg, Switzerland Grosjean Martin; Zander Paul;
20th Congress of the International Union for Quaternary Research (INQUA) Poster Investigating meromixis dynamics in varved lake sediments of Lake Jaczno, Poland using high-resolution hyperspectral imaging and XRF data. 25.07.2019 Dublin, Ireland Grosjean Martin;
20th Congress of the International Union for Quaternary Research (INQUA) Talk given at a conference Early human impact on biogeochemical cycling of Moossee, Switzerland: A Holocene high-resolution record of paleoproductivity and meromixis in lake sediments 25.07.2019 Dublin, Ireland Grosjean Martin;
20th Congress of the International Union for Quaternary Research (INQUA) Talk given at a conference High-resolution multi-proxy reconstruction of Holocene productivity and lake mixing dynamics, Lake Żabińskie, Poland 25.07.2019 Dublin, Ireland Zander Paul; Grosjean Martin;
20th Congress of the International Union for Quaternary Research (INQUA) Talk given at a conference Westerly wind variability at sub-Antarctic Macquarie Island: links to the Southern Annular Mode and Southern Hemisphere rainfall and temperature 25.07.2019 Dublin, Ireland Grosjean Martin;
20th Congress of the International Union for Quaternary Research (INQUA) Poster Radiocarbon dating in lake sediments: assessing the usefulness of very small samples using the Mini Carbon Dating System (MICADAS) 25.07.2019 Dublin, Ireland Grosjean Martin; Zander Paul;
20th Congress of the International Union for Quaternary Research (INQUA) Poster Assessing feral animal impacts on World Heritage sub-Antarctic Macquarie Island 25.07.2019 Dublin, Ireland Grosjean Martin;
20th Congress of the International Union for Quaternary Research (INQUA) Poster A Holocene high-resolution multi-proxy record of aquatic productivity, soil erosion and meromixis from varved Lake Rzesniki, NE Poland 25.07.2019 Dublin, Ireland Wienhues Giulia;
20th Swiss Global Change Day Poster High-resolution multi-proxy reconstruction of Holocene productivity and lake mixing dynamics, Lake Żabińskie, NE Poland 07.02.2019 Bern, Switzerland Grosjean Martin; Zander Paul;
16th Swiss Geoscience Meeting, Bern Poster Long-term productivity and meromixis dynamics on the Swiss Plateau (Lake Moossee, Switzerland) inferred from Hyperspectral Imaging 01.12.2018 Bern, Switzerland Grosjean Martin;
16th Swiss Geoscience Meeting Poster Combining Hyperspectral Imaging and µXRF data to link varve-formation processes with meteorological data, Lake Żabińskie, Poland 01.12.2018 Bern, Switzerland Zander Paul; Grosjean Martin;
17th International Swiss Climate Summer School Poster Combining Hyperspectral Imaging and µXRF data to link varve-formation processes with meteorological data, Lake Żabińskie, Poland 26.08.2018 Grindelwald, Switzerland Grosjean Martin; Zander Paul;
20th International Sedimentological Congress (ISC) Talk given at a conference Long-term high resolution records of productivity and meromixis from lake sediments using hyperspectral imaging spectroscopy: methods and applications 13.08.2018 Quebec, Canada Grosjean Martin;
International Paleolimnological Association Poster Long-term productivity and meromixis dynamics on the Swiss Plateau (Lake Moossee, Switzerland) inferred from Hyperspectral Imaging 18.06.2018 Stockholm, Sweden Grosjean Martin;
International Paleolimnological Association Poster Combining Hyperspectral Imaging and µXRF data to link varve-formation processes with meteorological data, Lake Żabińskie, Poland 18.06.2018 Stockholm, Sweden Zander Paul; Grosjean Martin;
19th Swiss Global Change Day Poster Combining Hyperspectral Imaging and µXRF data to link varve-formation processes with meteorological data, Lake Żabińskie, Poland 19.04.2018 Bern, Switzerland Zander Paul; Grosjean Martin;
19th Swiss Global Change Day Poster Rapid approach to deconvolute and quantify chloropigment speciation from spectrophotometry measurements 19.04.2018 Bern, Switzerland Sanchini Andrea; Grosjean Martin;
19th Swiss Global Change Day Poster Long-term productivity and meromixis dynamics on the Swiss Plateau (Lake Moossee, Switzerland) inferred from Hyperspectral Imaging 19.04.2018 Bern, Switzerland Grosjean Martin;
15th Swiss Geosciences Meeting Poster Long-term productivity and meromixis dynamics on the Swiss Plateau (Lake Moossee, Switzerland) inferred from Hyperspectral Imaging 17.11.2017 Davos, Switzerland Grosjean Martin;
1st Bern Workshop on 14C Analyses with the Mini-Radiocarbon-Dating System (MICADAS) Poster Hyperspectral imaging of varved lake sediments: Method development for carotenoids measurements in the VNIR (400-1000 nm) range and applications 13.09.2017 Bern, Switzerland Grosjean Martin; Sanchini Andrea;
1st Bern Workshop on 14C Analyses with the Mini-Radiocarbon-Dating System (MICADAS) Poster 14C age model refinement based on correlated tephra beds at Whitshed lakes, Cordova, Alaska 13.09.2017 Bern, Switzerland Zander Paul;
1st Bern Workshop on 14C Analyses with the Mini-Radiocarbon-Dating System (MICADAS) Talk given at a conference Dating recent sediments with radionuclides: Examples from Alaska 13.09.2017 Bern, Switzerland Zander Paul;
1st Bern Workshop on 14C Analyses with the Mini-Radiocarbon-Dating System (MICADAS) Poster Long-term productivity and meromixis dynamics on the Swiss Plateau (Lake Moossee, Switzerland) inferred from Hyperspectral Imaging 13.09.2017 Bern, Switzerland Grosjean Martin;
16th International Swiss Climate Summer School Poster Long-term productivity and meromixis dynamics on the Swiss Plateau (Lake Moossee, Switzerland) inferred from Hyperspectral Imaging 03.09.2017 Ascona, Switzerland Grosjean Martin;
16th International Swiss Climate Summer School Poster Hyperspectral imaging of varved lake sediments: Method development for carotenoids measurements in the VNIR (400-1000 nm) range and applications 03.09.2017 Ascona, Switzerland Grosjean Martin; Sanchini Andrea;


Associated projects

Number Title Start Funding scheme
134945 Calibrating and validating scanning VIS Reflectance Spectroscopy data (380 - 730 nm) from minerogenic and biochemical varves: improving climate reconstructions from lake sediments 01.12.2011 Project funding (Div. I-III)
182084 Exploring prehistoric vegetational and agricultural dynamics using annually laminated sediment records from Central and Southern Europe (ECSE) 01.02.2019 Project funding (Div. I-III)
183566 20,000 years of evolution and ecosystem dynamics in the world’s largest tropical lake reconstructed from sediment cores, fossils and ancient DNA 01.03.2019 Sinergia

Abstract

The Anthropocene has seen unprecedented environmental change, and fundamental ecosystem services are increasingly at stake. This is particularly true for climate change and biogeochemical cycles. Interactions of both resulted, for instance, in global spread of anoxia in freshwater systems. However, a sound scientific assessment of such changes must rely on a long-term perspective. This information can be provided, for instance, by high-resolution quantitative diagnostic proxy records from varved lake sediments.Recently, the applicant and his team have developed novel imaging methods (hyperspectral imaging in the visible/near-infrared range VNIR-HSI) for the biogeochemical analysis of lake sediments. We have established the “proof of concept” that VNIR-HSI data can be used (i) to quantify distributions and time-series of pigments that are diagnostic for aquatic productivity ({Chl a and chlorins}) and meromixis (bacteriopheophytin a) and, (ii) to reconstruct annually resolved season-specific quantitative climate variables. This novel technology provides information at ultra-high resolution (45 µm); it is cost effective and very rapid. This work has been cited among the most innovative and promising future developments in the field.Thus, the proposed research will develop along two thrusts (2 PhD projects):1. Next level methodology: we propose (i) to extend laboratory-scale HSI of lake sediments to SWIR (1000-2500 nm), which allows to detect important mineral groups (calcite, feldspars, clays, Fe-oxides) in biogenic varves and assess key-processes within the lake and the catchment (marl and metal-oxide precipitation, redox conditions, erosion/land cover); (ii) to improve data acquisition in the 450-500 nm range (identification of carotenoids) and, (iii) separate Chl a and chlorins in the HSI-VNIR absorption band 650-700 nm.2. Applications: The recently developed HSI-VNIR methodology (proof of concept) will be applied in three fields: (i) Productivity/Meromixis: we will establish the first annually resolved Holocene/Lateglacial long records of HSI-inferred aquatic productivity and meromixis from varved lake sediments in Switzerland and Poland and assess the driving processes by comparison with independent paleoclimate/paleoecolocical data. (ii) Paleoclimatology: using combined VNIR/SWIR/µXRF data we will explore how meteorological-scale phenomena and related limnological processes (fall algal blooms, multiple marl precipitation, phenology of anoxia etc.) are recorded in biogenic varves of NE Poland, and whether this could be used for ‘Paleoweather ’ reconstructions. (iii) We assess SWIR-lithogenic components in Holocene records from subantarctic islands (approved project ACE, Swiss Polar Institute).
-