Global Research Alliance N2O chamber methodology guidelines: Guidelines for gap‐filling missing measurements

Christopher D. Dorich; Daniele De Rosa; Louise Barton; Peter Grace; David Rowlings; Massimiliano De Antoni Migliorati; Claudia Wagner‐Riddle; Cameron Key; Daqi Wang; Benjamin Fehr; Richard T Conant

doi:10.1002/jeq2.20138

journal article Open Access Sep 01, 2020

Global Research Alliance N2O chamber methodology guidelines: Guidelines for gap‐filling missing measurements

Christopher D. Dorich

Daniele De Rosa

Louise Barton Peter Grace

David Rowlings

Massimiliano De Antoni Migliorati Claudia Wagner‐Riddle

Cameron Key Daqi Wang Benjamin Fehr Richard T Conant

Journal of Environmental Quality Vol. 49 No. 5 pp. 1186-1202 · Wiley

View at Publisher Save 10.1002/jeq2.20138

Abstract

AbstractNitrous oxide (N2O) is a potent greenhouse gas that is primarily emitted from agriculture. Sampling limitations have generally resulted in discontinuous N2O observations over the course of any given year. The status quo for interpolating between sampling points has been to use a simple linear interpolation. This can be problematic with N2O emissions, since they are highly variable and sampling bias around these peak emission periods can have dramatic impacts on cumulative emissions. Here, we outline five gap‐filling practices: linear interpolation, generalized additive models (GAMs), autoregressive integrated moving average (ARIMA), random forest (RF), and neural networks (NNs) that have been used for gap‐filling soil N2O emissions. To facilitate the use of improved gap‐filling methods, we describe the five methods and then provide strengths and challenges or weaknesses of each method so that model selection can be improved. We then outline a protocol that details data organization and selection, splitting of data into training and testing datasets, building and testing models, and reporting results. Use of advanced gap‐filling methods within a standardized protocol is likely to increase transparency, improve emission estimates, reduce uncertainty, and increase capacity to quantify the impact of mitigation practices.

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References

Details

Published: Sep 01, 2020
Vol/Issue: 49(5)
Pages: 1186-1202
License: View

Authors

C

Christopher D. Dorich

Natural Resource Ecology Lab. Colorado State Univ. Fort Collins CO 80523 USA

D

Daniele De Rosa

Institute for Future Environments Queensland Univ. of Technology Brisbane QLD 4000 Australia

L

Louise Barton

SoilsWest, School of Agriculture and Environment (M079), Faculty of Science The Univ. of Western Australia 35 Stirling Highway Crawley WA 6009 Australia

P

Peter Grace

Institute for Future Environments Queensland Univ. of Technology Brisbane QLD 4000 Australia

D

David Rowlings

Institute for Future Environments Queensland Univ. of Technology Brisbane QLD 4000 Australia

M

Massimiliano De Antoni Migliorati

Institute for Future Environments Queensland Univ. of Technology Brisbane QLD 4000 Australia

C

Claudia Wagner‐Riddle

School of Environmental Sciences Univ. of Guelph Guelph ON N1G 2W1 Canada

C

Cameron Key

Dep. of Electrical and Computer Engineering Colorado State Univ. Fort Collins CO 80523 USA

D

Daqi Wang

Natural Resource Ecology Lab. Colorado State Univ. Fort Collins CO 80523 USA

B

Benjamin Fehr

Dep. of Agriculture Nutrition and Food Systems Univ. of New Hampshire Durham NH 03823 USA

R

Richard T Conant

Natural Resource Ecology Lab. Colorado State Univ. Fort Collins CO 80523 USA

Cite This Article

Christopher D. Dorich, Daniele De Rosa, Louise Barton, et al. (2020). Global Research Alliance N2O chamber methodology guidelines: Guidelines for gap‐filling missing measurements. Journal of Environmental Quality, 49(5), 1186-1202. https://doi.org/10.1002/jeq2.20138

Global Research Alliance N2O chamber methodology guidelines: Guidelines for gap‐filling missing measurements

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