English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Direct measurement of NO3 radical reactivity in a boreal forest

Liebmann, J. M., Karu, E., Sobanski, N., Schuladen, J., Ehn, M., Schallhart, S., et al. (2018). Direct measurement of NO3 radical reactivity in a boreal forest. Atmospheric Chemistry and Physics, 18(5), 3799-3815. doi:10.5194/acp-18-3799-2018.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Liebmann, Jonathan M.1, Author           
Karu, Einar1, Author           
Sobanski, Nicolas1, Author           
Schuladen, Jan1, Author           
Ehn, Mikael2, Author
Schallhart, Simon2, Author
Quelever, Lauriane2, Author
Hellen, Heidi2, Author
Hakola, Hannele2, Author
Hoffmann, Thorsten2, Author
Williams, Jonathan1, Author           
Fischer, Horst1, Author           
Lelieveld, Jos1, Author           
Crowley, J. N.1, Author           
Affiliations:
1Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              
2external, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: We present the first direct measurements of NO3 reactivity (or inverse lifetime, s−1) in the Finnish boreal forest. The data were obtained during the IBAIRN campaign (Influence of Biosphere-Atmosphere Interactions on the Reactive Nitrogen budget) which took place in Hyytiälä, Finland during the summer/autumn transition in September 2016. The NO3 reactivity was generally very high with a maximum value of 0.94s−1 and displayed a strong diel variation with a campaign-averaged nighttime mean value of 0.11s−1 compared to a daytime value of 0.04s−1. The highest nighttime NO3 reactivity was accompanied by major depletion of canopy level ozone and was associated with strong temperature inversions and high levels of monoterpenes. The daytime reactivity was sufficiently large that reactions of NO3 with organic trace gases could compete with photolysis and reaction with NO. There was no significant reduction in the measured NO3 reactivity between the beginning and end of the campaign, indicating that any seasonal reduction in canopy emissions of reactive biogenic trace gases was offset by emissions from the forest floor. Observations of biogenic hydrocarbons (BVOCs) suggested a dominant role for monoterpenes in determining the NO3 reactivity. Reactivity not accounted for by in situ measurement of NO and BVOCs was variable across the diel cycle with, on average,  ≈ 30% "missing" during nighttime and  ≈ 60% missing during the day. Measurement of the NO3 reactivity at various heights (8.5 to 25m) both above and below the canopy, revealed a strong nighttime, vertical gradient with maximum values closest to the ground. The gradient disappeared during the daytime due to efficient vertical mixing.

Details

show
hide
Language(s): eng - English
 Dates: 2018
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000427509700002
DOI: 10.5194/acp-18-3799-2018
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Atmospheric Chemistry and Physics
  Abbreviation : ACP
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Göttingen : Copernicus Publications
Pages: - Volume / Issue: 18 (5) Sequence Number: - Start / End Page: 3799 - 3815 Identifier: ISSN: 1680-7316
CoNE: https://pure.mpg.de/cone/journals/resource/111030403014016