Academic Journals Database
Disseminating quality controlled scientific knowledge

HCl and ClO profiles inside the Antarctic vortex as observed by SMILES in November 2009: comparisons with MLS and ACE-FTS instruments

ADD TO MY LIST
 
Author(s): T. Sugita | Y. Kasai | Y. Terao | S. Hayashida | G. L. Manney | W. H. Daffer | H. Sagawa | M. Suzuki | M. Shiotani | K. A. Walker | C. D. Boone | P. F. Bernath

Journal: Atmospheric Measurement Techniques Discussions
ISSN 1867-8610

Volume: 6;
Issue: 4;
Start page: 6729;
Date: 2013;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

ABSTRACT
We present vertical profiles of hydrogen chloride (HCl) and chlorine monoxide (ClO) as observed by the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) inside the Antarctic vortex on 19–24 November 2009. The SMILES HCl value reveals 2.8–3.1 ppbv between 450 and 500 K levels in potential temperature (PT). The high value of HCl is highlighted since it is suggested that HCl was a main component of the total inorganic chlorine (Cly), defined as Cly ≃ HCl + ClO + chlorine nitrate (ClONO2) inside the Antarctic vortex in spring, owing to low ozone values. To confirm the quality of two SMILES Level 2 (L2) data products provided by Japan Aerospace Exploration Agency (JAXA) and National Institute of Information and Communications Technology (NICT) from a view point of the partitioning of Cly, comparisons are made using other satellite data, from the Aura Microwave Limb Sounder (MLS) and Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS). HCl values from the SMILES NICT L2 product agree to within 10% with the MLS HCl data between 425 and 650 K levels in PT and with the ACE-FTS HCl data between 425 and 575 K, respectively. The SMILES JAXA L2 product is 10 to 20% smaller than that from MLS (ACE-FTS) between 400 (500 K) and 700 K. For ClO in daytime, the difference between SMILES (JAXA and NICT) and MLS was less than ±0.05 ppbv between 500 and 650 K with the ClO values less than 0.2 ppbv. ClONO2 values as measured by ACE-FTS also reveal 0.2 ppbv at 475–500 K level, resulting in the HCl/Cly ratios of 0.91–0.95. The high HCl value and HCl/Cly ratio found from the three satellite instruments agree with the past observations inside the Antarctic vortex at this time (October to November) of year in the lower stratosphere.
RPA Switzerland

RPA Switzerland

Robotic process automation

    

Tango Rapperswil
Tango Rapperswil