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Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere

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Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere. / Kritten, L.; Butz, A.; Chipperfield, M. P.; Dorf, M.; Dhomse, S.; Hossaini, R.; Oelhaf, H.; Prados-Roman, C.; Wetzel, G.; Pfeilsticker, K.

In: Atmospheric Chemistry and Physics , Vol. 14, No. 18, 16.09.2014, p. 9555-9566.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Kritten, L, Butz, A, Chipperfield, MP, Dorf, M, Dhomse, S, Hossaini, R, Oelhaf, H, Prados-Roman, C, Wetzel, G & Pfeilsticker, K 2014, 'Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere', Atmospheric Chemistry and Physics , vol. 14, no. 18, pp. 9555-9566. https://doi.org/10.5194/acp-14-9555-2014

APA

Kritten, L., Butz, A., Chipperfield, M. P., Dorf, M., Dhomse, S., Hossaini, R., Oelhaf, H., Prados-Roman, C., Wetzel, G., & Pfeilsticker, K. (2014). Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere. Atmospheric Chemistry and Physics , 14(18), 9555-9566. https://doi.org/10.5194/acp-14-9555-2014

Vancouver

Kritten L, Butz A, Chipperfield MP, Dorf M, Dhomse S, Hossaini R et al. Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere. Atmospheric Chemistry and Physics . 2014 Sep 16;14(18):9555-9566. https://doi.org/10.5194/acp-14-9555-2014

Author

Kritten, L. ; Butz, A. ; Chipperfield, M. P. ; Dorf, M. ; Dhomse, S. ; Hossaini, R. ; Oelhaf, H. ; Prados-Roman, C. ; Wetzel, G. ; Pfeilsticker, K. / Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere. In: Atmospheric Chemistry and Physics . 2014 ; Vol. 14, No. 18. pp. 9555-9566.

Bibtex

@article{6857f47a33304029948de9f261287118,
title = "Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere",
abstract = "The absorption cross section of N2O5, sigma N2O5(lambda, T), which is known from laboratory measurements with the uncertainty of a factor of 2 (Table 4-2 in (Jet Propulsion Laboratory) JPL-2011; the spread in laboratory data, however, points to an uncertainty in the range of 25 to 30 %, Sander et al., 2011), was investigated by balloon-borne observations of the relevant trace gases in the tropical mid-stratosphere. The method relies on the observation of the diurnal variation of NO2 by limb scanning DOAS (differential optical absorption spectroscopy) measurements (Weidner et al., 2005; Kritten et al., 2010), supported by detailed photochemical modelling of NOy (NOx(= NO + NO2) + NO3 + 2N(2)O(5) + ClONO2 + HO2NO2 + BrONO2 + HNO3) photochemistry and a non-linear least square fitting of the model result to the NO2 observations. Simulations are initialised with O-3 measured by direct sun observations, the NOy partitioning from MIPAS-B (Michelson Interferometer for Passive Atmospheric Sounding - Balloon- borne version) observations in similar air masses at night-time, and all other relevant species from simulations of the SLIMCAT (Single Layer Isentropic Model of Chemistry And Transport) chemical transport model (CTM). Best agreement between the simulated and observed diurnal increase of NO2 is found if the sigma N2O5(lambda, T) is scaled by a factor of 1.6 +/- 0.8 in the UV-C (200-260 nm) and by a factor of 0.9 +/- 0.26 in the UV-B/A (260-350 nm), compared to current recommendations. As a consequence, at 30 km altitude, the N2O5 lifetime against photolysis becomes a factor of 0.77 shorter at solar zenith angle (SZA) of 30 degrees than using the recommended sigma N2O5(lambda, T), and stays more or less constant at SZAs of 60 degrees. Our scaled N2O5 photolysis frequency slightly reduces the lifetime (0.2-0.6 %) of ozone in the tropical mid-and upper stratosphere, but not to an extent to be important for global ozone.",
keywords = "CHEMICAL-TRANSPORT MODEL, BALLOON-BORNE, LIMB MEASUREMENTS, NITROGEN-OXIDES, OZONE, NO2, VALIDATION, ATMOSPHERE, CHEMISTRY, CLIMATE",
author = "L. Kritten and A. Butz and Chipperfield, {M. P.} and M. Dorf and S. Dhomse and R. Hossaini and H. Oelhaf and C. Prados-Roman and G. Wetzel and K. Pfeilsticker",
year = "2014",
month = sep,
day = "16",
doi = "10.5194/acp-14-9555-2014",
language = "English",
volume = "14",
pages = "9555--9566",
journal = "Atmospheric Chemistry and Physics ",
issn = "1680-7316",
publisher = "Copernicus GmbH (Copernicus Publications) on behalf of the European Geosciences Union (EGU)",
number = "18",

}

RIS

TY - JOUR

T1 - Constraining the N2O5 UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere

AU - Kritten, L.

AU - Butz, A.

AU - Chipperfield, M. P.

AU - Dorf, M.

AU - Dhomse, S.

AU - Hossaini, R.

AU - Oelhaf, H.

AU - Prados-Roman, C.

AU - Wetzel, G.

AU - Pfeilsticker, K.

PY - 2014/9/16

Y1 - 2014/9/16

N2 - The absorption cross section of N2O5, sigma N2O5(lambda, T), which is known from laboratory measurements with the uncertainty of a factor of 2 (Table 4-2 in (Jet Propulsion Laboratory) JPL-2011; the spread in laboratory data, however, points to an uncertainty in the range of 25 to 30 %, Sander et al., 2011), was investigated by balloon-borne observations of the relevant trace gases in the tropical mid-stratosphere. The method relies on the observation of the diurnal variation of NO2 by limb scanning DOAS (differential optical absorption spectroscopy) measurements (Weidner et al., 2005; Kritten et al., 2010), supported by detailed photochemical modelling of NOy (NOx(= NO + NO2) + NO3 + 2N(2)O(5) + ClONO2 + HO2NO2 + BrONO2 + HNO3) photochemistry and a non-linear least square fitting of the model result to the NO2 observations. Simulations are initialised with O-3 measured by direct sun observations, the NOy partitioning from MIPAS-B (Michelson Interferometer for Passive Atmospheric Sounding - Balloon- borne version) observations in similar air masses at night-time, and all other relevant species from simulations of the SLIMCAT (Single Layer Isentropic Model of Chemistry And Transport) chemical transport model (CTM). Best agreement between the simulated and observed diurnal increase of NO2 is found if the sigma N2O5(lambda, T) is scaled by a factor of 1.6 +/- 0.8 in the UV-C (200-260 nm) and by a factor of 0.9 +/- 0.26 in the UV-B/A (260-350 nm), compared to current recommendations. As a consequence, at 30 km altitude, the N2O5 lifetime against photolysis becomes a factor of 0.77 shorter at solar zenith angle (SZA) of 30 degrees than using the recommended sigma N2O5(lambda, T), and stays more or less constant at SZAs of 60 degrees. Our scaled N2O5 photolysis frequency slightly reduces the lifetime (0.2-0.6 %) of ozone in the tropical mid-and upper stratosphere, but not to an extent to be important for global ozone.

AB - The absorption cross section of N2O5, sigma N2O5(lambda, T), which is known from laboratory measurements with the uncertainty of a factor of 2 (Table 4-2 in (Jet Propulsion Laboratory) JPL-2011; the spread in laboratory data, however, points to an uncertainty in the range of 25 to 30 %, Sander et al., 2011), was investigated by balloon-borne observations of the relevant trace gases in the tropical mid-stratosphere. The method relies on the observation of the diurnal variation of NO2 by limb scanning DOAS (differential optical absorption spectroscopy) measurements (Weidner et al., 2005; Kritten et al., 2010), supported by detailed photochemical modelling of NOy (NOx(= NO + NO2) + NO3 + 2N(2)O(5) + ClONO2 + HO2NO2 + BrONO2 + HNO3) photochemistry and a non-linear least square fitting of the model result to the NO2 observations. Simulations are initialised with O-3 measured by direct sun observations, the NOy partitioning from MIPAS-B (Michelson Interferometer for Passive Atmospheric Sounding - Balloon- borne version) observations in similar air masses at night-time, and all other relevant species from simulations of the SLIMCAT (Single Layer Isentropic Model of Chemistry And Transport) chemical transport model (CTM). Best agreement between the simulated and observed diurnal increase of NO2 is found if the sigma N2O5(lambda, T) is scaled by a factor of 1.6 +/- 0.8 in the UV-C (200-260 nm) and by a factor of 0.9 +/- 0.26 in the UV-B/A (260-350 nm), compared to current recommendations. As a consequence, at 30 km altitude, the N2O5 lifetime against photolysis becomes a factor of 0.77 shorter at solar zenith angle (SZA) of 30 degrees than using the recommended sigma N2O5(lambda, T), and stays more or less constant at SZAs of 60 degrees. Our scaled N2O5 photolysis frequency slightly reduces the lifetime (0.2-0.6 %) of ozone in the tropical mid-and upper stratosphere, but not to an extent to be important for global ozone.

KW - CHEMICAL-TRANSPORT MODEL

KW - BALLOON-BORNE

KW - LIMB MEASUREMENTS

KW - NITROGEN-OXIDES

KW - OZONE

KW - NO2

KW - VALIDATION

KW - ATMOSPHERE

KW - CHEMISTRY

KW - CLIMATE

U2 - 10.5194/acp-14-9555-2014

DO - 10.5194/acp-14-9555-2014

M3 - Journal article

VL - 14

SP - 9555

EP - 9566

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 18

ER -