Project
Back to overview
Calibrating and validating scanning VIS Reflectance Spectroscopy data (380 - 730 nm) from minerogenic and biochemical varves: improving climate reconstructions from lake sediments
English title |
Calibrating and validating scanning VIS Reflectance Spectroscopy data (380 - 730 nm) from minerogenic and biochemical varves: improving climate reconstructions from lake sediments |
Applicant |
Grosjean Martin
|
Number |
134945 |
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 |
01.12.2011 - 30.11.2014 |
Approved amount |
197'849.00 |
Show all
All Disciplines (2)
Other disciplines of Environmental Sciences |
Other disciplines of Earth Sciences |
Keywords (6)
Climate Change; Paleoclimate; Sedimentology; Holocene; Switzerland; limnology
Lay Summary (English)
Lead
|
|
Lay summary
|
Seasonal to annual quantitative reconstructions of spatially-explicit climate state variables for the last 2000 years across the world are recognized as one of the primary targets for current climate research. Varved (annually laminated) lake sediments play a key role in this context because they provide seasonally resolved paleoclimate archives with a very good chronology. The minerogenic varves in Lake Oeschinen, a proglacial lake in the northern Swiss Alps will be used to establish the first quantitative summer precipitation record back to ca. 1000 AD for Switzerland. In a pilot study for the varves AD 1920-1986, we have established that varve thickness and mineralogical composition is a good predictor for MJJA precipitation (r=0.64, p<0.05). Phyllosilicate influx is related to rain stroms whereas calcite influx is related to glacial meltwater. Novel scanning techniques (reflectance spectroscopy 380-730 nm) will be explored to analyze sediment compositions at very high (mm-scale) resolution.
|
Responsible applicant and co-applicants
Employees
Publications
ButzC. Grosjean M. Goslar T. Tylmann W. (2017), Hyperspectral imaging of sedimentary bacterial pigments: A 1728 years long history of meromixis in varved Lake Jaczno, north eastern Poland, in
Journal of Paleolimnology, 58(1), 57-72.
Butz C. Grosjean M. Poraj-Górska A. Enters D. Tylmann W. (2016), Sedimentary Bacteriopheophytin a as an indicator of meromixis in varved lake sediments of Lake Jaczno, north-east Poland, AD 1891 – 2010, in
Global and Planetary Change , 144, 109-118.
Amann B. Szidat S. Grosjean M. (2015), A millennial-long record of warm season precipitation and flood frequency for the North-western Alps inferred from varved lake sediments: implications for the future, in
Quaternary Science Reviews , 115, 89-100.
ButzC. Grosjean M. Fischer D. Wunderle S. Tylmann W. Rein B. (2015), Hyperspectral imaging spectroscopy: A promising method for the biogeochemical analysis of lake sediments, in
Journal of Applied Remote Sensing , 9(096031), 1-20.
Grosjean M. Amann B. Butz C. Rein B. Tylmann W. (2014), Hyperspectral imaging: a novel, nondestructive method for investigating subannual sediment structures and composition, in
PAGES Magazine, 22(1), 10-11.
Amann Benjamin, Mauchle Fabian, Grosjean Martin (2014), Quantitative high-resolution warm season rainfall recorded in varved sediments of Lake Oeschinen, northern Swiss Alps: calibration and validation AD 1901-2008, in
Journal of Paleolimnology, 51, 375-391.
Amann B. Lobsiger S. Fischer D. Tylmann W. Bonk A. Filipiak J. Grosjean M (2014), Spring temperature variability and eutrophication history inferred from sedimentary pigments in the varved sediments of Lake Żabińskie, north-eastern Poland, 1907 – 2008 AD, in
Global and Planetary Change, 123, 86-96.
Collaboration
Prof. D. Ariztegui, U Geneva |
Switzerland (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results |
Oeschger Center Consortium / NCCR Climate |
Switzerland (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results - Research Infrastructure - Exchange of personnel |
EU FP6 'Millennium' consortium |
Great Britain and Northern Ireland (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results |
PD Bert Rein, U Mainz & GeoConsult |
Germany (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results - Publication - Research Infrastructure |
IGBP-PAGES Past Global Changes |
Switzerland (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results - Publication |
Prof. F. Anselmetti, UniBE |
Switzerland (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results - Research Infrastructure |
PD Dr. W. Thylmann, U Gdansk |
Poland (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results - Research Infrastructure |
Dr. A. Gilli, ETH Zurich |
Switzerland (Europe) |
|
- Research Infrastructure |
Prof. Bernd Zolitschka, U Bremen |
Germany (Europe) |
|
- in-depth/constructive exchanges on approaches, methods or results - Research Infrastructure |
Scientific events
Active participation
Title |
Type of contribution |
Title of article or contribution |
Date |
Place |
Persons involved |
The Coldest Decade of the Millennium? The Spörer Minimum, the Climate during the 1430s, and its Economic, Social and Cultural Impact.
|
Talk given at a conference
|
The Spörer minimum represented in lake sediments: case studies from the Alps and Poland
|
04.12.2014
|
Bern, Switzerland
|
Amann Benjamin;
|
4th Climpol workshop
|
Talk given at a conference
|
Sedimentary pigments & VIS-RS data – Potential for a 1000 yr climate reconstruction
|
11.09.2014
|
Gdansk, Poland
|
Grosjean Martin; Amann Benjamin;
|
PAGES 2k International Conference - Climate variability and human impacts in Central and Eastern Europe during the last two millennia
|
Talk given at a conference
|
Spring (MAM) temperature signal in the varved sediments of Lake Zabinskie, NE Poland - Calibration and reconstruction back to AD 1600
|
17.06.2014
|
Gdansk, Poland
|
Grosjean Martin; Amann Benjamin;
|
EGU General Assembly 2014 [Vienna, Austria]
|
Poster
|
Quantitative high-resolution rainfall reconstruction back to AD 750 from the varved sediments of Lake Oeschinen, northern Swiss Alps
|
27.04.2014
|
Vienna, Austria
|
Amann Benjamin; Grosjean Martin;
|
EGU General Assembly 2014 [Vienna, Austria]
|
Poster
|
Spring-temperature variability and eutrophication history inferred from sedimentary pigments in the varved sediments of Lake Żabińskie, NE Poland
|
27.04.2014
|
Vienna, Austria
|
Amann Benjamin; Grosjean Martin;
|
15th Swiss Global Change Day [Bern, Switzerland]
|
Poster
|
Varved lake sediments for quantitative climate research
|
02.04.2014
|
Bern, Switzerland
|
Grosjean Martin; Amann Benjamin;
|
11th Swiss Geoscience Meeting
|
Talk given at a conference
|
Scanning reflectance spectroscopy (380-730 nm) for Paleoenvironmental and climatic changes assessment
|
16.11.2013
|
Lausanne, Switzerland
|
Grosjean Martin; Amann Benjamin;
|
3rd Climpol workshop
|
Talk given at a conference
|
Geochemical proxies: calibration with climate data
|
13.09.2013
|
Jeziorowskie, Poland
|
Grosjean Martin; Amann Benjamin;
|
12th International NCCR Climate Summer School “From climate reconstructions to climate predictions”
|
Poster
|
Varved lake sediments for quantitative climate research
|
01.09.2013
|
Grindelwald, Switzerland
|
Grosjean Martin; Amann Benjamin;
|
14th Swiss Global Change Day
|
Poster
|
Varved Lake Oeschinen, Swiss Alps: quantitative assessment of precipitation signal in the sediments
|
16.04.2013
|
Bern, Switzerland
|
Amann Benjamin; Grosjean Martin;
|
10th Swiss Geoscience Meeting 2012
|
Poster
|
Varved Lake Oeschinen: quantitative assessment of climate signal in the sediments
|
17.11.2012
|
Bern, Switzerland, Switzerland
|
Amann Benjamin; Grosjean Martin;
|
2nd ClimPol Workshop 2012
|
Talk given at a conference
|
High-resolution VIS-RS scanning
|
18.10.2012
|
Gdansk, Poland, Poland
|
Amann Benjamin; Grosjean Martin;
|
11th International NCCR Climate Summer School “The Water Cycle in a Changing Climate. Observations, Scenarios, Impacts”
|
Poster
|
Quantitative summer (MJJA) precipitation; calibration and validation from varved Lake Oeschinen, Swiss Alps
|
09.09.2012
|
CSF Monte Verita, Switzerland, Switzerland
|
Grosjean Martin; Amann Benjamin;
|
13th Swiss Global Change Day
|
Poster
|
A promising site for high-resolution multi-proxy European paleoclimate reconstructions: the last millennium from northern Poland
|
04.04.2012
|
Bern, Switzerland, Switzerland
|
Amann Benjamin; Grosjean Martin;
|
IGBP-PAGES 3rd Varve Working Group Workshop
|
Talk given at a conference
|
Quantitative summer MJJA precipitation and rainstorms from varved Lake Oeschinen, Swiss Alps: calibration and validation AD 1920-1986
|
20.03.2012
|
Manderscheid, Germany, Germany
|
Amann Benjamin; Grosjean Martin;
|
Associated projects
Number |
Title |
Start |
Funding scheme |
172586
|
Exploring VNIR/SWIR Hyperspectral Imaging of Varved Lake Sediments: Methods and Applications in Paleoclimatology and Paleoecology |
01.07.2017 |
Project funding (Div. I-III) |
152986
|
Climate variability in the SW Ecuadorian Andes of the past two millennia: a contribution to IGBP-PAGES 2k |
01.07.2014 |
Project funding (Div. I-III) |
116005
|
Annual- to decadal-scale quantitative climate reconstructions from varved Alpine lake sediments for the last 3300 years / ENLARGE II |
01.02.2008 |
Project funding (Div. I-III) |
121869
|
Scanning in-situ reflectance spectroscopy as a novel tool for high-resolution climate reconstructions from lake sediments, southern Chile |
01.12.2008 |
Project funding (Div. I-III) |
Abstract
Seasonal to annual quantitative reconstructions of spatially-explicit climate state variables for the last 2000 years across the world are recognized as one of the primary targets for current climate research (IGBP-PAGES/WCRP-CLIVAR. This builds on the rationale that knowledge about the natural, forced and stochastic variability at different scales, rates of change and probabilities of extremes is critical (i) to discriminate the human fingerprint on the global climate in the 20th century (detection and attribution) and (ii) to reduce uncertainty for ecological, societal and economic risks when natural variability and anthropogenic forcings are superposed in a future warmer climate.Varved (annually laminated) lake sediments play a key role in this context. They provide very highly resolved (seasonal to annual) paleoclimate archives with a very good chronology spanning over long periods (several millennia). They may provide information in areas where other annually resolved paleoclimate archives are short in length or not available. It is also recognized that lake sediments may preserve signals of low-frequency climate variability, which is one of the moist critical challenges for climate reconstructions.However, well-calibrated, quantified annually resolved millennial-long records are very difficult to obtain from lake sediments: the analytical work is enormous, precise and accurate chronologies are difficult to establish, and calibration has remained a challenge. In consequence, research priorities include two targets: (i) development of rapid, scanning and non-destructive techniques and (ii) development of numerical tools for calibrations.This has been the target of research in the Paleolimnology Group U Bern over the past years. We have implemented and developed novel scanning Reflectance Spectroscopy (380 - 730 nm, VIS RS) with direct measurements of fresh split sediment cores, and have converted VIS RS data into quantitative measures of climate variables. This has produced remarkable data sets for climate reconstructions and generated growing interest and international recognition: In first case studies from Chile, Tasmania and the Alps we show that VIS RS data indicative of minerogenic compounds (mainly illite and chlorite) and sedimentary pigments provide excellent quantitative summer temperature and summer precipitation reconstructions for the past 1000 years. However, interpreting VIS RS data is still in its infancy and poorly understood. Calibration of VIS RS data with concentration and composition of specific sediment compounds is the recognized methodological gap.This proposal is the logic continuation of NF 200021-116005 (‘Late Holocene varved sediments from Lake Silvaplana’) and seeks funding to calibrate VIS RS data of minerogenic and biochemical varved lake sediments with specific compositions of minerals and sedimentary pigments, respectively as determined with established analytical methods (XRD, XRF elemental mapping, microscopy of thin sections, extraction and HPLC, biogenic Si and TOC/N). In consequence, the proposed research develops along two major thrusts:Thrust 1: Calibrate VIS RS data from minerogenic varves in Lake Oeschinen with phyllosilicate/calcite ratios and reconstruct MJJA precipitation back to ca. 1000 AD. In a pilot study for the varves 1920-1986, we have established that varve thickness is a good predictor for MJJA precipitation (r=0.64, p<0.05), that phyllosilicate influx is related to rain stroms whereas calcite influx is related to glacial meltwater. Using this information we will (i) Refine the “sediment proxy - climate” calibration, (ii) Calibrate/validate VIS RS data with ‘synthetic sediments’ and sediment short cores, and (iii) Reconstruct summer precipitation back to ca. 1000 AD.Thrust 2: Calibrate VIS RS data from biochemical varves in Lake Lazduny, Poland with sedimentary pigments. Many of the VIS RS-bases climate reconstructions target reflectance features indicative of sedimentary pigments. Currently, our understanding of these features is unspecific and interpretations speculative (or missing). We have carefully selected biochemical varves from lake Lazduny to (i) Calibrate VIS RS data with concentrations and composition of sedimentary pigments (HPLC), (ii) Calibrate autigenic calcite with VIS RS data, and (iii) asses the skill of this data set fro climate reconstructions. The project has a methodological component (relevant to many other research groups) and a data/result component (directly relevant to international climate research programmes IGBP-PAGES and WCRP-CLIVAR).
-