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Elucidating aggregate microstructure with NanoSIMS and digital image processing

Steffens, Markus and Rogge, Derek and Hoeschen, Carmen and Müller, Carsten W. (2015) Elucidating aggregate microstructure with NanoSIMS and digital image processing. 5th International Symposium on Soil Organic Matter, 2015-09-20 - 2015-09-24, Göttingen, Germany.

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Soil aggregation is a key factor for a number of biogeochemical processes (e.g. soil organic matter stabilization and nutrient and pollutant sorption) in soils. Although there is a large number of studies on the factors controlling such soil processes, it is still challenging to study these processes in-situ. However it can be assumed that the spatial arrangement of organic and mineral soil constituents in soil aggregates and thus the aggregate structure determine the processes happening at the aggregate scale. We used the nano-scale secondary ion mass spectrometry (NanoSIMS) technology to study a cross section of a single large aggregate from the top-soil of an agricultural cropland with a regular grid of 45 measurements (each with a size of 30x30 µm). Using Cs+ as primary ion, the negatively charged ions 12C-, 12C14N-, 12C15N-, 27Al16O-, 56Fe16O- and 28Si- were collected with a lateral resolution of up to 100 nm. We applied pre-processing algorithms and unsupervised classifications to separate and identify organic and inorganic compartments in the NanoSIMS measurements. Our approach enabled us to explore the elemental and isotopic composition of organic and mineral particles at a hitherto unresolved lateral resolution for a complete soil aggregate and spatially explicitly map and quantify the different compartments.

Item URL in elib:https://elib.dlr.de/102148/
Document Type:Conference or Workshop Item (Poster)
Title:Elucidating aggregate microstructure with NanoSIMS and digital image processing
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Steffens, MarkusLehrstuhl für Bodenkunde TU MünchenUNSPECIFIEDUNSPECIFIED
Hoeschen, CarmenLehrstuhl für Bodenkunde TU MünchenUNSPECIFIEDUNSPECIFIED
Müller, Carsten W.Lehrstuhl für Bodenkunde TU MünchenUNSPECIFIEDUNSPECIFIED
Date:20 September 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Soil aggregation, Soil organic matter, NanoSIMS
Event Title:5th International Symposium on Soil Organic Matter
Event Location:Göttingen, Germany
Event Type:international Conference
Event Start Date:20 September 2015
Event End Date:24 September 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Rogge, Derek
Deposited On:15 Jan 2016 11:58
Last Modified:24 Apr 2024 20:07

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