Ammonia (NH3) emissions characterization from agricultural soil sources from the NH3_STAT statistical model from 1990-01-01 to 2019-01-01 (NCEI Accession 0207181)

We also performed a region-based analysis (U.S., India, and China) using the NH3_STAT model. For the U.S., our model produces an estimate that is 143% higher in comparison to EPA. Meanwhile, the NH3_STAT model estimate for India shows NH3 emissions between -0.8 and 1.4 times lower when compared to other data sets.

A lower estimate is also seen for China, where the model estimates NH3 emissions 0.4-5 times lower than other datasets. The difference in the global estimates is attributed to the lower estimates in major agricultural countries like China and India. The statistical model captures the spatial distribution of global NH3 emissions by utilizing a simplified approach compared to other readily available datasets.

Moreover, the NH3_STAT model provides an opportunity to predict future NH3 emissions in a changing world.