Partitioning of NOy species in the summer Arctic stratosphere
- 15 April 1999
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 26 (8) , 1157-1160
- https://doi.org/10.1029/1999gl900166
Abstract
Volume mixing ratio profiles of the quantitatively significant NOy species NO, NO2, HNO3, HNO4, ClNO3 and N2O5 were measured remotely from 8 to 38 km by the JPL MkIV FTIR solar absorption spectrometer during balloon flights from Fairbanks, Alaska (64.8°N, 147.6°W) on May 8 and July 8, 1997. The observed ratio of NOx (NO + NO2) to NOy (total reactive nitrogen) is 10 to 30% greater than calculated by a steady state model using standard photochemistry constrained by MkIV measurements of long lived precursors (e.g., H2O, CH4, CO and N2O) and SAGE II aerosol surface area. The persistence of this discrepancy to 38 km altitude suggests that processes involving aerosols, such as the reduction of HNO3 on the surface of soot particles, cannot be the sole explanation. The most likely resolution to this discrepancy is that the rate of NO2 + OH + M → HNO3 + M (the dominant sink of NOx in the Arctic stratosphere during times of near continuous solar illumination) is significantly slower than the currently recommended rate.This publication has 17 references indexed in Scilit:
- A comparison of observations and model simulations of NOx/NOy in the lower stratosphereGeophysical Research Letters, 1999
- Reconsideration of the Rate Constant for the Reaction of Hydroxyl Radicals with Nitric AcidThe Journal of Physical Chemistry A, 1999
- Temperature and pressure dependent kinetics of the gas‐phase reaction of the hydroxyl radical with nitrogen dioxideGeophysical Research Letters, 1999
- Rate constants for the reaction OH+NO2+M→HNO3+M under atmospheric conditionsChemical Physics Letters, 1999
- Observations of OH, HO2, H2O, and O3 in the upper stratosphere: Implications for HOx photochemistryGeophysical Research Letters, 1998
- Nitric Acid Uptake and Decomposition on Black Carbon (Soot) Surfaces: Its Implications for the Upper Troposphere and Lower StratosphereThe Journal of Physical Chemistry A, 1998
- High‐pressure flow study of the reactions OH + NOx→ HONOx: Errors in the falloff regionJournal of Geophysical Research: Atmospheres, 1997
- Partitioning of the reactive nitrogen reservoir in the lower stratosphere of the southern hemisphere: Observations and modelingJournal of Geophysical Research: Atmospheres, 1997
- Rate measurements of reactions of OH by resonance absorption. Part 5.—Rate constants for OH + NO2(+M)→ HNO3(+M) over a wide range of temperature and pressureJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1976
- Gas phase recombination of OH with NO and NO2The Journal of Chemical Physics, 1974