Spatially explicit estimates of N2O emissions from croplands suggest climate mitigation opportunities from improved fertilizer management

13215 12 56851 3 159441 document 56851 Spatially explicit estimates of N2O emissions from croplands suggest climate mitigation opportunities from improved fertilizer management.pdf application/pdf 06dd56f66e484f8ec67646e4f22133eb MD5 688686 2016-05-23 09:15:17 https://pure.iiasa.ac.at/id/eprint/13215/1/Spatially%20explicit%20estimates%20of%20N2O%20emissions%20from%20croplands%20suggest%20climate%20mitigation%20opportunities%20from%20improved%20fertilizer%20management.pdf 13215 1 1 application/pdf text en public cc_by_nc

Spatially explicit estimates of N2O emissions from croplands suggest climate mitigation opportunities from improved fertilizer management.pdf

accepted 56859 2 159454 document 56859 lightbox.jpg image/png 8c1f31915a474f53f10236504f7015aa MD5 33123 2016-05-23 09:25:26 https://pure.iiasa.ac.at/id/eprint/13215/2/lightbox.jpg 13215 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en staffonly

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/56851 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/56851 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/56851 archive 5 disk0/00/01/32/15 2016-05-17 09:44:26 2021-08-27 17:27:00 2016-05-17 09:44:26 article show Gerber J.S. Carlson K.M. Makowski D. Mueller N.D. Garcia de Cortazar-Atauri I. Havlik P. 1868 0000-0001-5551-5085 Herrero M. Launay M. O'Connell C.S. Smith P. West P.C. Spatially explicit estimates of N2O emissions from croplands suggest climate mitigation opportunities from improved fertilizer management pub prog_esm With increasing nitrogen (N) application to croplands required to support growing food demand, mitigating N2O emissions from agricultural soils is a global challenge. National greenhouse gas emissions accounting typically estimates N2O emissions at the country scale by aggregating all crops, under the assumption that N2O emissions are linearly related to N application. However, field studies and meta-analyses indicate a nonlinear relationship, in which N2O emissions are relatively greater at higher N application rates. Here we apply a super-linear emissions response model to crop-specific, spatially-explicit synthetic N fertilizer and manure N inputs to provide subnational accounting of global N2O emissions from croplands. We estimate 0.66 Tg of N2O-N direct global emissions circa 2000, with 50% of emissions concentrated in 13% of harvested area. Compared to estimates from the IPCC Tier 1 linear model, our updated N2O emissions range from 20-40% lower throughout Sub-Saharan Africa and Eastern Europe, to >120% greater in some Western European countries. At low N application rates, the weak non-linear response of N2O emissions suggests that relatively large increases in N fertilizer application would generate relatively small increases in N2O emissions. Since aggregated fertilizer data generate underestimation bias in nonlinear models, high-resolution N application data are critical to support accurate N2O emissions estimates. 2016-10 published John Wiley & Sons 10.1111/gcb.13341 119 public Global Change Biology 22 10 3383-3394 TRUE 13541013 FALSE no info:eu-repo/semantics/article