scholarly journals Large vertical gradient of reactive nitrogen oxides in the boundary layer: Modeling analysis of DISCOVER-AQ 2011 observations

2016 ◽  
Vol 121 (4) ◽  
pp. 1922-1934 ◽  
Author(s):  
Yuzhong Zhang ◽  
Yuhang Wang ◽  
Gao Chen ◽  
Charles Smeltzer ◽  
James Crawford ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Nitrogen Oxides ◽  
Vertical Gradient ◽  
Reactive Nitrogen ◽  
Modeling Analysis ◽  
Reactive Nitrogen Oxides

The Chemical Dynamics of NO and Reactive Nitrogen Oxides: A Practical Guide

2004 ◽  
Vol 4 (7) ◽  
pp. 723-740 ◽  
Author(s):  
Daniele Mancardi ◽  
Lisa Ridnour ◽  
Douglas Thomas ◽  
Tatsuo Katori ◽  
Carlo Tocchetti ◽  
...  
Keyword(s):  
Nitrogen Oxides ◽  
Reactive Nitrogen ◽  
Chemical Dynamics ◽  
Practical Guide ◽  
Reactive Nitrogen Oxides

scholarly journals Reactive nitrogen oxides and ozone above a taiga woodland

1994 ◽  
Vol 99 (D1) ◽  
pp. 1927 ◽  
Author(s):  
Peter S. Bakwin ◽  
Daniel J. Jacob ◽  
Steven C. Wofsy ◽  
J. William Munger ◽  
Bruce C. Daube ◽  
...  
Keyword(s):  
Nitrogen Oxides ◽  
Reactive Nitrogen ◽  
Reactive Nitrogen Oxides

scholarly journals Global deposition of total reactive nitrogen oxides from 1996 to 2014 constrained with satellite observations of NO<sub>2</sub> columns

2017 ◽  
Vol 17 (16) ◽  
pp. 10071-10091 ◽  
Author(s):  
Jeffrey A. Geddes ◽  
Randall V. Martin
Keyword(s):  
North America ◽  
Nitrogen Oxides ◽  
East Asia ◽  
Major Constituent ◽  
Reactive Nitrogen ◽  
Nox Emissions ◽  
The World ◽  
Reactive Nitrogen Oxides ◽  
Global Deposition

Abstract. Reactive nitrogen oxides (NOy) are a major constituent of the nitrogen deposited from the atmosphere, but observational constraints on their deposition are limited by poor or nonexistent measurement coverage in many parts of the world. Here we apply NO2 observations from multiple satellite instruments (GOME, SCIAMACHY, and GOME-2) to constrain the global deposition of NOy over the last 2 decades. We accomplish this by producing top-down estimates of NOx emissions from inverse modeling of satellite NO2 columns over 1996–2014, and including these emissions in the GEOS-Chem chemical transport model to simulate chemistry, transport, and deposition of NOy. Our estimates of long-term mean wet nitrate (NO3−) deposition are highly consistent with available measurements in North America, Europe, and East Asia combined (r =  0.83, normalized mean bias  = −7 %, N =  136). Likewise, our calculated trends in wet NO3− deposition are largely consistent with the measurements, with 129 of the 136 gridded model–data pairs sharing overlapping 95 % confidence intervals. We find that global mean NOy deposition over 1996–2014 is 56.0 Tg N yr−1, with a minimum in 2006 of 50.5 Tg N and a maximum in 2012 of 60.8 Tg N. Regional trends are large, with opposing signs in different parts of the world. Over 1996 to 2014, NOy deposition decreased by up to 60 % in eastern North America, doubled in regions of East Asia, and declined by 20 % in parts of western Europe. About 40 % of the global NOy deposition occurs over oceans, with deposition to the North Atlantic Ocean declining and deposition to the northwestern Pacific Ocean increasing. Using the residual between NOx emissions and NOy deposition over specific land regions, we investigate how NOx export via atmospheric transport has changed over the last 2 decades. Net export from the continental United States decreased substantially, from 2.9 Tg N yr−1 in 1996 to 1.5 Tg N yr−1 in 2014. Export from China more than tripled between 1996 and 2011 (from 1.0 to 3.5 Tg N yr−1), before a striking decline to 2.5 Tg N yr−1 by 2014. We find that declines in NOx export from some western European countries have counteracted increases in emissions from neighboring countries to the east. A sensitivity study indicates that simulated NOy deposition is robust to uncertainties in NH3 emissions with a few exceptions. Our novel long-term study provides timely context on the rapid redistribution of atmospheric nitrogen transport and subsequent deposition to ecosystems around the world.

Soluble reactive nitrogen oxides at South Pole during ISCAT 2000

2004 ◽  
Vol 38 (32) ◽  
pp. 5399-5409 ◽  
Author(s):  
Jack E. Dibb ◽  
L. Gregory Huey ◽  
Darlene L. Slusher ◽  
David J. Tanner
Keyword(s):  
Nitrogen Oxides ◽  
Reactive Nitrogen ◽  
South Pole ◽  
Reactive Nitrogen Oxides
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