In:
Atmospheric Measurement Techniques, Copernicus GmbH, Vol. 15, No. 5 ( 2022-03-09), p. 1233-1249
Abstract:
Abstract. For the past 17 years, the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) instrument on the Canadian SCISAT satellite
has been measuring profiles of atmospheric ozone. The latest operational
versions of the level 2 ozone data are versions 3.6 and 4.1. This study
characterizes how both products compare with correlative data from other
limb-sounding satellite instruments, namely MAESTRO, MLS, OSIRIS, SABER, and
SMR. In general, v3.6, with respect to the other instruments, exhibits a
smaller bias (which is on the order of ∼ 3 %) in the middle
stratosphere than v4.1 (∼ 2 %–9 %); however, the bias exhibited
in the v4.1 data tends to be more stable, i.e. not changing significantly
over time in any altitude region. In the lower stratosphere, v3.6 has a
positive bias of about 3 %–5 % that is stable to within
±1 % per decade, and v4.1 has a bias on the order of −1 % to +5 % and is also stable to within ±1 % per decade. In the middle stratosphere, v3.6 has a positive bias of ∼ 3 % with a significant negative drift on the order of 0.5 %–2.5 % per decade, and v4.1 has a positive bias of 2 %–9 % that is stable to within ±0.5 % per decade. In the upper stratosphere, v3.6 has a positive bias that increases with altitude up to ∼ 16 % and a significant negative drift on the order of 2 %–3 % per decade, and v4.1 has a positive bias that increases with altitude up to ∼ 15 % and is stable to within ±1 % per decade. Estimates indicate that both versions 3.6 and 4.1 have precision values on the order of 0.1–0.2 ppmv below 20 km and above 45 km (∼ 5 %–10 %, depending on altitude). Between 20 and 45 km, the
estimated v3.6 precision of ∼ 4 %–6 % is better than the
estimated v4.1 precision of ∼ 6 %–10 %.
Type of Medium:
Online Resource
ISSN:
1867-8548
DOI:
10.5194/amt-15-1233-2022
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2022
detail.hit.zdb_id:
2505596-3
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