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A novel approach to evaluate the spatial complexity of soil aggregates using NanoSIMS

Steffens, Markus and Rogge, Derek and Hoeschen, Carmen and Mueller, Carsten W. (2015) A novel approach to evaluate the spatial complexity of soil aggregates using NanoSIMS. EGU General Assembly, 12-17 April 2015, Vienna, Austria.

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Abstract

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 biogenic and mineral soil constituents in soil aggregates and thus the aggregate structure determine the processes happening at the aggregate scale. In the last years a number of studies proved the great potential ofWe 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). soil processes on intact soil samples. The simultaneous analysis of up to seven ion species, with high sensitivity and lateral resolution, make it a useful tool for the analysis of biogeochemical processes and properties of soils. Using Cs+ as primary ions, the negatively charged ions, like e.g. 12C-, 13C-, 12C14N-, 12C15N-, but also 27Al16O-, or 56Fe16O- and 28Si-, are 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. Thus, the NanoSIMSOur approach enableds us to explore the elemental and isotopic composition of organic and inorganic soil organic matterparticles at a before 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/102147/
Document Type:Conference or Workshop Item (Speech)
Title:A novel approach to evaluate the spatial complexity of soil aggregates using NanoSIMS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Steffens, MarkusLehrstuhl für Bodenkunde TU MünchenUNSPECIFIED
Rogge, Derekderek.rogge (at) dlr.deUNSPECIFIED
Hoeschen, CarmenLehrstuhl für Bodenkunde TU MünchenUNSPECIFIED
Mueller, Carsten W.Lehrstuhl für Bodenkunde TU MünchenUNSPECIFIED
Date:12 April 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Soil aggregation, Soil organic matter, NanoSIMS
Event Title:EGU General Assembly
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:12-17 April 2015
Organizer:General Assembly of the European Geosciences Union
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
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:10 May 2016 23:42

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