Inverse Estimation of an Annual Cycle of California's Nitrous Oxide Emissions

Jeong, Seongeun; Newman, Sally; Zhang, Jingsong; Andrews, Arlyn E.; Bianco, Laura; Dlugokencky, Ed; Bagley, Justin; Cui, Xinguang; Priest, Chad; Campos‐Pineda, Mixtli; Fischer, Marc L.

doi:10.1029/2017JD028166

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Inverse Estimation of an Annual Cycle of California's Nitrous Oxide Emissions

2018
By Jeong, Seongeun ; Newman, Sally ; Zhang, Jingsong ; ...
Source: JGR Atmospheres 123(9): 4758-4771, 2018

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Journal Title:

Journal of Geophysical Research: Atmospheres
Personal Author:

Jeong, Seongeun ; Newman, Sally ; Zhang, Jingsong ; Andrews, Arlyn E. ; Bianco, Laura ; ... More +

Jeong, Seongeun ; Newman, Sally ; Zhang, Jingsong ; Andrews, Arlyn E. ; Bianco, Laura ; Dlugokencky, Ed ; Bagley, Justin ; Cui, Xinguang ; Priest, Chad ; Campos‐Pineda, Mixtli ; Fischer, Marc L. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

Nitrous oxide (N2O) is a potent long‐lived greenhouse gas (GHG) and the strongest current emissions of global anthropogenic stratospheric ozone depletion weighted by its ozone depletion potential. In California, N2O is the third largest contributor to the state's anthropogenic GHG emission inventory, though no study has quantified its statewide annual emissions through top‐down inverse modeling. Here we present the first annual (2013–2014) statewide top‐down estimates of anthropogenic N2O emissions. Utilizing continuous N2O observations from six sites across California in a hierarchical Bayesian inversion, we estimate that annual anthropogenic emissions are 1.5–2.5 times (at 95% confidence) the state inventory (41 Gg N2O in 2014). Without mitigation, this estimate represents 4–7% of total GHG emissions assuming that other reported GHG emissions are reasonably correct. This suggests that control of N2O could be an important component in meeting California's emission reduction goals of 40% and 80% below 1990 levels of the total GHG emissions (in CO2 equivalent) by 2030 and 2050, respectively. Our seasonality analysis suggests that emissions are similar across seasons within posterior uncertainties. Future work is needed to provide source attribution for subregions and further characterization of seasonal variability.
Keywords:

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Atmospheric Chemistry Mathematical Models Nitrous Oxide
Source:

JGR Atmospheres 123(9): 4758-4771, 2018
DOI:

https://doi.org/10.1029/2017JD028166
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Journal Article
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California
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urn:sha256:489614b228c6f3aa25cf54bf30fc1bd39f5f502673524b483162def10b00a106
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Inverse Estimation of an Annual Cycle of California's Nitrous Oxide Emissions

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