How to best address spatial and temporal variability of soil‐derived nitrous oxide and methane emissions

Jungkunst, Hermann F.; Meurer, Katharina; Jurasinski, Gerald; Niehaus, Engelbert; Günther, Anke

doi:10.1002/jpln.201700607

Cited by 8 publications

(6 citation statements)

References 33 publications

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“…N 2 O fluxes from the soil to the atmosphere depend not only on production processes, but also on gas diffusion within the soil profile (Oertel et al ., ). Therefore, N 2 O fluxes are characterized by a high spatial and temporal variability which must be addressed when measuring N 2 O fluxes in the field (Jungkunst et al ., ). Making the most simplified assumption that the quasi‐constant N 2 O : CO 2 emission ratio found here for 34 plant species is representative of other terrestrial plants, and can be transferred to an ecosystem scale, we first employed this ratio with data on plant respiration (Table S3) to constrain the plant‐derived N 2 O release from a well‐studied research station area in Germany, and then also applied it on a global scale.…”

Section: Resultsmentioning

confidence: 99%

Nitrous oxide effluxes from plants as a potentially important source to the atmosphere

et al. 2018

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The global budget for nitrous oxide (N 2 O), an important greenhouse gas and probably dominant ozone-depleting substance emitted in the 21 st century, is far from being fully understood. Cycling of N 2 O in terrestrial ecosystems has traditionally exclusively focused on gas exchange between the soil surface (nitrification-denitrification processes) and the atmosphere. Terrestrial vegetation has not been considered in the global budget so far, even though plants are known to release N 2 O.Here, we report the N 2 O emission rates of 32 plant species from 22 different families measured under controlled laboratory conditions. Furthermore, the first isotopocule values (d 15 N, d 18 O and d 15 N sp ) of N 2 O emitted from plants were determined. A robust relationship established between N 2 O emission and CO 2 respiration rates, which did not alter significantly over a broad range of changing environmental conditions, was used to quantify plant-derived emissions on an ecosystem scale. Stable isotope measurements (d 15 N, d 18 O and d 15 N sp ) of N 2 O emitted by plants clearly show that the dual isotopocule fingerprint of plant-derived N 2 O differs from that of currently known microbial or chemical processes.Our work suggests that vegetation is a natural source of N 2 O in the environment with a large fraction released by a hitherto unrecognized process.

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Section: Resultsmentioning

confidence: 99%

Nitrous oxide effluxes from plants as a potentially important source to the atmosphere

et al. 2018

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“…The temporal variability of soil N 2 O flux contributes significantly to the uncertainty of emission estimates (Jungkunst et al, 2018; Lammirato et al, 2018). The three‐tier system introduced by the IPCC classifies methodological approaches based on the quantity of information involved, where Tier 3 approaches consist of methods with the highest analytical complexity including direct flux measurements and complex models (Bickel et al, 2006; de Klein et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Diurnal variability in soil nitrous oxide emissions is a widespread phenomenon

Whitaker

Toet

et al. 2021

Global Change Biology

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“…In special cases, it can be effective to use two‐point flux estimates if—in turn—the total number of conducted flux measurements can thus be increased (Chadwick et al., 2014). This procedure allows for reducing the overall uncertainty due to spatial variability while allowing for higher uncertainty of individual flux estimates (Jungkunst et al., 2018).…”

Section: Measuring Soil–atmosphere Gas Fluxes Using Non‐steady‐state ...mentioning

confidence: 99%

Introduction of a guideline for measurements of greenhouse gas fluxes from soils using non‐steady‐state chambers

Maier

Weber

Fiedler

et al. 2022

J. Plant Nutr. Soil Sci.

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Soils represent a major global source and sink of greenhouse gases (GHGs). Many studies of GHG fluxes between soil, plant and atmosphere rely on chamber measurements. Different chamber techniques have been developed over the last decades, each characterised by different requirements and limitations. In this manuscript, we focus on the non-steadystate technique which is widely used for manual measurements but also in automatic systems. Although the measurement method appears very simple, experience gained over the years shows that there are many details which have to be taken into account to obtain reliable measurement results. This manuscript aims to share lessons learnt and pass on experiences in order to assist the reader with possible questions or unexpected challenges, ranging from the planning of the design of studies and chambers to the practical handling of the chambers and the quality assurance of the gas and data analysis. This concise introduction refers to a more extensive Best Practice Guideline initiated by the Working Group Soil Gases (AG Bodengase) of the German Soil Science Society (Deutsche Bodenkundliche Gesellschaft). The intention was to collect and aggregate the expertise of different working groups in the research field. As a compendium, this Best Practice Guideline is intended to help both beginnersThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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How to best address spatial and temporal variability of soil‐derived nitrous oxide and methane emissions

Abstract: Take Home Message It can be justifiable to determine nitrous oxide and methane flux rates from soil with only two concentration measurements to allow for more spatial precision.

Cited by 8 publications

References 33 publications

Nitrous oxide effluxes from plants as a potentially important source to the atmosphere

Nitrous oxide effluxes from plants as a potentially important source to the atmosphere

Diurnal variability in soil nitrous oxide emissions is a widespread phenomenon

Introduction of a guideline for measurements of greenhouse gas fluxes from soils using non‐steady‐state chambers

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