Open AccessMeasurements of ClONO 2 by the Improved Limb Atmospheric Spectrometer (ILAS) in high‐latitude stratosphere: New products using version 6.1 data processing algorithm
Author(s) -
Nakajima H.,
Sugita T.,
Irie H.,
Saitoh N.,
Kanzawa H.,
Oelhaf H.,
Wetzel G.,
Toon G. C.,
Sen B.,
Blavier J.F.,
Traub W. A.,
Jucks K.,
Johnson D. G.,
Yokota T.,
Sasano Y.
Publication year - 2006
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2005jd006441
Subject(s) - stratosphere , arctic , atmospheric sciences , environmental science , latitude , remote sensing , satellite , polar vortex , meteorology , climatology , geology , geodesy , physics , astronomy , oceanography
We report the first continuous measurements of chlorine nitrate (ClONO 2 ) in high‐latitude regions taken by the Improved Limb Atmospheric Spectrometer (ILAS) on board the Advanced Earth Observing Satellite (ADEOS) and processed using the latest data retrieval algorithm (version 6.1). Performance of the measurements, validation with three balloon‐borne sensors, and seasonal variation of ClONO 2 in the Arctic and Antarctic stratosphere are presented, as well as a brief description of the version 6.1 algorithm and data characteristics for both the Arctic and Antarctic. Although the ILAS‐measured ClONO 2 data show, on average, ∼30% lower values than the validation data, they agree with validation data within the combined total error (∼20–40%) of the ClONO 2 measurements at ∼15‐ to 32‐km altitudes. In the Arctic, enhancement of ClONO 2 amounts was observed in spring 1997 after the appearance of polar stratospheric clouds (PSCs) inside the polar vortex. This is the result of preference for ClONO 2 formation rather than HCl after the activation of ClOx in this Arctic spring of 1997. In the Antarctic, ClONO 2 amounts showed strong local time/latitudinal dependence around the austral fall equinox in 1997.