Sensitive response of atmospheric oxidative capacity to the uncertainty in the emissions of nitric oxide (NO) from soils in Amazonia

Soils are a major source of nitrogen oxides, which in the atmosphere help govern its oxidative capacity. Thus the response of soil nitric oxide (NO) emissions to forcings such as warming or forest loss has a meaningful impact on global atmospheric chemistry. We find that the soil emission rate of NO in Amazonia from a common inventory is biased low by at least an order of magnitude in comparison to tower-based observations. Accounting for this regional bias decreases the modeled global methane lifetime by 1.4% to 2.6%. In comparison, a fully deforested Amazonia, representing a 37% decrease in global emissions of isoprene, decreases methane lifetime by at most 4.6%, highlighting the sensitive response of oxidation rates to changes in emissions of NO compared to those of terpenes. Our results demonstrate that improving our understanding of soil NO emissions will yield a more accurate representation of atmospheric oxidative capacity., Flux Data from Tapajos National Forest:
Mixing ratios of NO, nitrogen dioxide (NO2), and O3 were measured at the Tapajos National Forest from January to August of 2015. Ambient air in excess of instrument requirements was drawn in at 4-6 liters per minute (lpm) through inlets located at eight heights off of the tall tower (0.91, 3.05, 10.42, 19.57, 28.71, 39.41, 53.04, 62.24 m above the ground). The NO chemiluminescence analyzer drew ~2 lpm and the O3 analyzer drew ~1 lpm. Excess flow was pulled by a bypass pump to maintain constant pressure measured by a pressure controller. The inlets were sampled in sequence for 4 minutes each. NO and NO2 were measured by an EcoPhysics CLD-780TR analyzer equipped with an external NO2 photolysis cell using a Hamamatsu LED with peak wavelength at 365 nm (Pollack et al., 2010). The photolysis cell was toggled on and off at 60 s intervals to provide both NO and NO + NO2 measurement at each sample height. All instruments were housed in an air conditioned ..., , # Data from: Sensitive response of atmospheric oxidative capacity to the uncertainty in the emissions of nitric oxide (NO) from soils in Amazonia

There are two data types included in this dataset.
1\. Flux data from Tapajos National Forest
2\. Climate model simulation output

## Description of the data and file structure

**1. Flux data from Tapajos National Forest**
Data collected at Tapajos National Forest is presented in a space delimited text file that contains the following columns as well as a header row:
year (yyyy)
month (mo)
day (dd)
hour (hh)
minute (mm)
second (ss)
mixing ratio of NO (NO_ppt)
mixing ratio of NO2 (NO2_ppt)
mixing ratio of Ozone (O3_ppb)
height in the canopy of the observation (height_m)

Mixing ratios of NO, nitrogen dioxide (NO2), and O3 were measured at the Tapajos National Forest from January to August of 2015. Ambient air in excess of instrument requirements was drawn in at 4-6 liters per minute (lpm) through inlets located at eight heights off of the t...