HOx measurements in the summertime upper troposphere over Europe: a comparison of observations to a box model and a 3-D model
Item
Title (Dublin Core)
HOx measurements in the summertime upper troposphere over Europe: a comparison of observations to a box model and a 3-D model
Description (Dublin Core)
In situ airborne measurements of OH and HO<sub>2</sub> with the HORUS (HydrOxyl Radical measurement Unit based on fluorescence Spectroscopy) instrument were performed in the summertime upper troposphere across Europe during the HOOVER 2 (HO<sub>x</sub> OVer EuRope) campaign in July 2007. Complementary measurements of trace gas species and photolysis frequencies were conducted to obtain a broad data set, which has been used to quantify the significant HO<sub>x</sub> sources and sinks. In this study we compare the in situ measurement of OH and HO<sub>2</sub> with simulated mixing ratios from the constrained box model CAABA/MECCA (Chemistry As A Box Model Application/Module Efficiently Calculating the Chemistry of the Atmosphere), and the global circulation model EMAC (ECHAM5/MESSy Atmospheric Chemistry Model). The constrained box model reproduces the observed OH and HO<sub>2</sub> mixing ratios with better agreement (obs/mod median 98% OH, 96% HO<sub>2</sub>) than the global model (median 76% OH, 59% HO<sub>2</sub>). The observations and the computed HO<sub>x</sub> sources and sinks are used to identify deviations between the models and their impacts on the calculated HO<sub>x</sub> budget.
Creator (Dublin Core)
Regelin, E.
Harder, H.
Martinez, M.
Kubistin, D.
Tatum Ernest, C.
Bozem, H.
Klippel, T.
Hosaynali-Beygi, Z.
Fischer, H.
Sander, R.
Jöckel, P.
Königstedt, R.
Lelieveld, J.
Date (Dublin Core)
2018-09-28
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-13-10703-2013
https://acp.copernicus.org/articles/13/10703/2013/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
