The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles
A global data set of vertical profiles of polar stratospheric cloud (PSC) volume density has been derived from Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) space-borne infrared limb measurements between 2002 and 2012. To develop a well characterized and efficient retrieval schem...
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ftcopernicus:oai:publications.copernicus.org:amt69115 2023-05-15T15:15:59+02:00 The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles Höpfner, Michael Deshler, Terry Pitts, Michael Poole, Lamont Spang, Reinhold Stiller, Gabriele Clarmann, Thomas 2019-01-18 application/pdf https://doi.org/10.5194/amt-11-5901-2018 https://amt.copernicus.org/articles/11/5901/2018/ eng eng doi:10.5194/amt-11-5901-2018 https://amt.copernicus.org/articles/11/5901/2018/ eISSN: 1867-8548 Text 2019 ftcopernicus https://doi.org/10.5194/amt-11-5901-2018 2020-07-20T16:23:04Z A global data set of vertical profiles of polar stratospheric cloud (PSC) volume density has been derived from Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) space-borne infrared limb measurements between 2002 and 2012. To develop a well characterized and efficient retrieval scheme, systematic tests based on limb-radiance simulations for PSCs from in situ balloon observations have been performed. The finally selected wavenumber range was 831–832.5 cm −1 . Optical constants of nitric acid trihydrate (NAT) have been used to derive maximum and minimum profiles of volume density which are compatible with MIPAS observations under the assumption of small, non-scattering and larger, scattering PSC particles. These max/min profiles deviate from their mean value at each altitude by about 40 %–45 %, which is attributed as the maximum systematic error of the retrieval. Further, the retrieved volume density profiles are characterized by a random error due to instrumental noise of 0.02–0.05 µm 3 cm −3 , a detection limit of about 0.1–0.2 µm 3 cm −3 and a vertical resolution of around 3 km . Comparisons with coincident observations by the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) on the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) satellite showed good agreement regarding the vertical profile shape. Quantitatively, in the case of supercooled ternary solution (STS) PSCs, the CALIOP dataset fits to the MIPAS retrievals obtained under the assumptions of small particles. Unlike for STS and NAT, in the case of ice PSCs the MIPAS retrievals are limited by the clouds becoming optically thick in the limb-direction. In these cases, the MIPAS volume densities represent lower limits. Among other interesting features, this climatology helps to study quantitatively the on-set of PSC formation very near to the South Pole and the large variability of the PSC volume densities between different Arctic stratospheric winters. Text Arctic South pole Copernicus Publications: E-Journals Arctic South Pole Atmospheric Measurement Techniques 11 10 5901 5923 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
A global data set of vertical profiles of polar stratospheric cloud (PSC) volume density has been derived from Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) space-borne infrared limb measurements between 2002 and 2012. To develop a well characterized and efficient retrieval scheme, systematic tests based on limb-radiance simulations for PSCs from in situ balloon observations have been performed. The finally selected wavenumber range was 831–832.5 cm −1 . Optical constants of nitric acid trihydrate (NAT) have been used to derive maximum and minimum profiles of volume density which are compatible with MIPAS observations under the assumption of small, non-scattering and larger, scattering PSC particles. These max/min profiles deviate from their mean value at each altitude by about 40 %–45 %, which is attributed as the maximum systematic error of the retrieval. Further, the retrieved volume density profiles are characterized by a random error due to instrumental noise of 0.02–0.05 µm 3 cm −3 , a detection limit of about 0.1–0.2 µm 3 cm −3 and a vertical resolution of around 3 km . Comparisons with coincident observations by the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) on the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) satellite showed good agreement regarding the vertical profile shape. Quantitatively, in the case of supercooled ternary solution (STS) PSCs, the CALIOP dataset fits to the MIPAS retrievals obtained under the assumptions of small particles. Unlike for STS and NAT, in the case of ice PSCs the MIPAS retrievals are limited by the clouds becoming optically thick in the limb-direction. In these cases, the MIPAS volume densities represent lower limits. Among other interesting features, this climatology helps to study quantitatively the on-set of PSC formation very near to the South Pole and the large variability of the PSC volume densities between different Arctic stratospheric winters. |
format |
Text |
author |
Höpfner, Michael Deshler, Terry Pitts, Michael Poole, Lamont Spang, Reinhold Stiller, Gabriele Clarmann, Thomas |
spellingShingle |
Höpfner, Michael Deshler, Terry Pitts, Michael Poole, Lamont Spang, Reinhold Stiller, Gabriele Clarmann, Thomas The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
author_facet |
Höpfner, Michael Deshler, Terry Pitts, Michael Poole, Lamont Spang, Reinhold Stiller, Gabriele Clarmann, Thomas |
author_sort |
Höpfner, Michael |
title |
The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
title_short |
The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
title_full |
The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
title_fullStr |
The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
title_full_unstemmed |
The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
title_sort |
mipas/envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles |
publishDate |
2019 |
url |
https://doi.org/10.5194/amt-11-5901-2018 https://amt.copernicus.org/articles/11/5901/2018/ |
geographic |
Arctic South Pole |
geographic_facet |
Arctic South Pole |
genre |
Arctic South pole |
genre_facet |
Arctic South pole |
op_source |
eISSN: 1867-8548 |
op_relation |
doi:10.5194/amt-11-5901-2018 https://amt.copernicus.org/articles/11/5901/2018/ |
op_doi |
https://doi.org/10.5194/amt-11-5901-2018 |
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Atmospheric Measurement Techniques |
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11 |
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10 |
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5901 |
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5923 |
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