Global modeling of soil N2O emissions from natural processes

Journal Article
Global modeling of soil N2O emissions from natural processes
Saikawa, E., C.A. Schlosser, and R.G. Prinn (2013)
Global Biogeochemical Cycles, online first, doi: 10.1002/gbc.20087

Abstract/Summary:

Nitrous oxide is an important greenhouse gas and is a major ozone"’depleting substance. To understand and quantify soil nitrous oxide emissions, we expanded the Community Land Model with coupled Carbon and Nitrogen cycles version 3.5 by inserting a module to estimate monthly varying nitrous oxide emissions between 1975 and 2008. We evaluate our soil N2O emission estimates against existing emissions inventories, other process"’based model estimates, and observations from sites in the Amazon, North America, Central America, Asia, Oceania, Africa, and in Europe. The model reproduces precipitation, soil temperature, and observations of N2O emissions well at some but not at all sites and especially not during winter in the higher latitudes. Applying this model to estimate the past 24 years of global soil N2O emissions, we find that there is a significant decrease (increase) in soil N2O emissions associated with El Niño (La Niña) events.

© 2013 American Geophysical Union

Citation:

Saikawa, E., C.A. Schlosser, and R.G. Prinn (2013): Global modeling of soil N2O emissions from natural processes. Global Biogeochemical Cycles, online first, doi: 10.1002/gbc.20087 (http://dx.doi.org/10.1002/gbc.20087)
  • Journal Article
Global modeling of soil N2O emissions from natural processes

Saikawa, E., C.A. Schlosser, and R.G. Prinn

online first, doi: 10.1002/gbc.20087

Abstract/Summary: 

Nitrous oxide is an important greenhouse gas and is a major ozone"’depleting substance. To understand and quantify soil nitrous oxide emissions, we expanded the Community Land Model with coupled Carbon and Nitrogen cycles version 3.5 by inserting a module to estimate monthly varying nitrous oxide emissions between 1975 and 2008. We evaluate our soil N2O emission estimates against existing emissions inventories, other process"’based model estimates, and observations from sites in the Amazon, North America, Central America, Asia, Oceania, Africa, and in Europe. The model reproduces precipitation, soil temperature, and observations of N2O emissions well at some but not at all sites and especially not during winter in the higher latitudes. Applying this model to estimate the past 24 years of global soil N2O emissions, we find that there is a significant decrease (increase) in soil N2O emissions associated with El Niño (La Niña) events.

© 2013 American Geophysical Union

Supersedes: 

Process Modeling of Global Soil Nitrous Oxide Emissions