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AGU: Journal of Geophysical Research, Atmospheres

 

Keywords

  • nitric acid
  • polar stratosphere
  • ILAS-II

Index Terms

  • Atmospheric Composition and Structure: Middle atmosphere: composition and chemistry
  • Atmospheric Composition and Structure: Middle atmosphere: constituent transport and chemistry
  • Atmospheric Composition and Structure: Instruments and techniques
Abstract
Cited By (10)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 111, D11S03, 10 PP., 2006
doi:10.1029/2005JD006115

Validation of stratospheric nitric acid profiles observed by Improved Limb Atmospheric Spectrometer (ILAS)–II

H. Irie

Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan

T. Sugita

National Institute for Environmental Studies, Tsukuba, Japan

H. Nakajima

National Institute for Environmental Studies, Tsukuba, Japan

T. Yokota

National Institute for Environmental Studies, Tsukuba, Japan

H. Oelhaf

Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Karlsruhe, Germany

G. Wetzel

Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Karlsruhe, Germany

G. C. Toon

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

B. Sen

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

M. L. Santee

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Y. Terao

Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA

N. Saitoh

National Institute for Environmental Studies, Tsukuba, Japan

M. K. Ejiri

National Institute for Environmental Studies, Tsukuba, Japan

T. Tanaka

National Institute for Environmental Studies, Tsukuba, Japan

Y. Kondo

Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan

H. Kanzawa

Department of Earth and Environmental Sciences, Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan

H. Kobayashi

Central Research Institute of Electric Power Industry, Tokyo, Japan

Y. Sasano

National Institute for Environmental Studies, Tsukuba, Japan

The Improved Limb Atmospheric Spectrometer-II (ILAS-II) was launched aboard the Advanced Earth Observing Satellite-II (ADEOS-II) in December 2002. Stratospheric vertical profiles of nitric acid (HNO3) concentration observed by ILAS-II (version 1.4) are validated using coincident HNO3 measurements by balloon-borne instruments (MIPAS-B2 and MkIV) in March and April 2003. Further validation is performed by making climatological comparisons of lower stratospheric HNO3-ozone (O3) correlations obtained by ILAS-II and ILAS (the predecessor of ILAS-II) for specific potential vorticity-based equivalent latitudes and seasons where and when ILAS data showed very compact correlations in 1997. The reduced scatter of ILAS-II HNO3 values around the reference HNO3, which is derived from ILAS-II O3 using the ILAS HNO3-O3 correlation, shows that the precision of the ILAS-II HNO3 data is better than 13–14%, 5%, and 1% at 15, 20, and 25 km, respectively. Combining all of the comparisons made in the present study, the accuracy of the ILAS-II HNO3 profiles at 15–25 km is estimated to be better than −13%/+26%.

Received 22 April 2005; accepted 20 October 2005; published 29 March 2006.

Citation: Irie, H., et al. (2006), Validation of stratospheric nitric acid profiles observed by Improved Limb Atmospheric Spectrometer (ILAS)–II, J. Geophys. Res., 111, D11S03, doi:10.1029/2005JD006115.

Cited By

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