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. 2019 Jul 11;7(2):441–452. doi: 10.1093/nsr/nwz087

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© The Author(s) 2019. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Temporal variability of cropland-N₂O emissions globally and across 18 regions. Eighteen regions are divided consistently with the NMIP [3], including the United States (USA), Canada (CAN), Central America (CAM), Northern South America (NSA), Brazil (BRA), Southwest South America (SSA), Europe (EU), Northern Africa (NAF), Equatorial Africa (EQAF), Southern Africa (SAF), Russia (RUS), Central Asia (CAS), Middle East (MIDE), China (CHN), Korea and Japan (KAJ), South Asia (SAS), Southeast Asia (SEAS) and Oceania (OCE); solid and dashed lines indicate the EFs of our estimate and IPCC Tier 1 default; black lines indicate 10-year moving average values.