Residual temperature bias effects in stratospheric species distributions from LIMS
<p>The Nimbus 7 Limb Infrared Monitor of the Stratosphere (LIMS) instrument operated from 25 October 1978 through 28 May 1979. Its version 6 (V6) profiles were processed and archived in 2002. We present several diagnostic examples of the quality of the V6 stratospheric species distributions ba...
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Copernicus Publications
2021-03-01
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Series: | Atmospheric Measurement Techniques |
Online Access: | https://amt.copernicus.org/articles/14/2185/2021/amt-14-2185-2021.pdf |
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record_format |
Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
E. Remsberg V. L. Harvey A. Krueger M. Natarajan |
spellingShingle |
E. Remsberg V. L. Harvey A. Krueger M. Natarajan Residual temperature bias effects in stratospheric species distributions from LIMS Atmospheric Measurement Techniques |
author_facet |
E. Remsberg V. L. Harvey A. Krueger M. Natarajan |
author_sort |
E. Remsberg |
title |
Residual temperature bias effects in stratospheric species distributions from LIMS |
title_short |
Residual temperature bias effects in stratospheric species distributions from LIMS |
title_full |
Residual temperature bias effects in stratospheric species distributions from LIMS |
title_fullStr |
Residual temperature bias effects in stratospheric species distributions from LIMS |
title_full_unstemmed |
Residual temperature bias effects in stratospheric species distributions from LIMS |
title_sort |
residual temperature bias effects in stratospheric species distributions from lims |
publisher |
Copernicus Publications |
series |
Atmospheric Measurement Techniques |
issn |
1867-1381 1867-8548 |
publishDate |
2021-03-01 |
description |
<p>The Nimbus 7 Limb Infrared Monitor of the Stratosphere (LIMS) instrument
operated from 25 October 1978 through 28 May 1979. Its version 6 (V6)
profiles were processed and archived in 2002. We present several diagnostic
examples of the quality of the V6 stratospheric species distributions based
on their level 3 zonal Fourier coefficient products. In particular, we show
that there are small differences in the ascending (<span class="inline-formula"><i>A</i></span>) minus descending (<span class="inline-formula"><i>D</i></span>)
orbital temperature–pressure or <span class="inline-formula"><i>T</i>(<i>p</i></span>) profiles (their <span class="inline-formula"><i>A</i>−<i>D</i></span> values) that affect
(<span class="inline-formula"><i>A</i>−<i>D</i></span>) species values. Systematic <span class="inline-formula"><i>A</i>−<i>D</i></span> biases in <span class="inline-formula"><i>T</i>(<i>p</i></span>) can arise from small
radiance biases and/or from viewing anomalies along orbits. There can also
be (<span class="inline-formula"><i>A</i>−<i>D</i></span>) differences in <span class="inline-formula"><i>T</i>(<i>p</i></span>) due to not resolving and correcting for all of
the atmospheric temperature gradient along LIMS tangent view-paths. An error
in <span class="inline-formula"><i>T</i>(<i>p</i></span>) affects species retrievals through (1) the Planck blackbody
function in forward calculations of limb radiance that are part of the
iterative retrieval algorithm of LIMS, and (2) the registration of the
measured LIMS species radiance profiles in pressure altitude, mainly for the
lower stratosphere. There are clear <span class="inline-formula"><i>A</i>−<i>D</i></span> differences for ozone, H<span class="inline-formula"><sub>2</sub></span>O, and
HNO<span class="inline-formula"><sub>3</sub></span> but not for NO<span class="inline-formula"><sub>2</sub></span>. Percentage differences are larger in the
lower stratosphere for ozone and H<span class="inline-formula"><sub>2</sub></span>O because those species are
optically thick. We evaluate V6 ozone profile biases in the upper
stratosphere with the aid of comparisons against a monthly climatology of
UV–ozone soundings from rocketsondes. We also provide results of time series
analyses of V6 ozone, H<span class="inline-formula"><sub>2</sub></span>O, and potential vorticity for the middle
stratosphere to show that their average (<span class="inline-formula"><i>A</i>+<i>D</i></span>) V6 level 3 products provide
a clear picture of the evolution of those tracers during Northern Hemisphere
winter. We recommend that researchers use the average V6 level 3 product for
their science studies of stratospheric ozone and H<span class="inline-formula"><sub>2</sub></span>O, while keeping in
mind that there are uncorrected nonlocal
thermodynamic equilibrium effects in daytime ozone in the lower
mesosphere and in daytime H<span class="inline-formula"><sub>2</sub></span>O in the uppermost stratosphere. We also
point out that the present-day Sounding of the Atmosphere using Broadband
Emission Radiometry (SABER) experiment provides measurements and retrievals
of temperature and ozone that are nearly free of anomalous diurnal
variations and of effects from gradients at low and middle latitudes.</p> |
url |
https://amt.copernicus.org/articles/14/2185/2021/amt-14-2185-2021.pdf |
work_keys_str_mv |
AT eremsberg residualtemperaturebiaseffectsinstratosphericspeciesdistributionsfromlims AT vlharvey residualtemperaturebiaseffectsinstratosphericspeciesdistributionsfromlims AT akrueger residualtemperaturebiaseffectsinstratosphericspeciesdistributionsfromlims AT mnatarajan residualtemperaturebiaseffectsinstratosphericspeciesdistributionsfromlims |
_version_ |
1724213024429965312 |
spelling |
doaj-e9e27735604b44c9b1a40d2dee5877af2021-03-19T14:09:05ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482021-03-01142185219910.5194/amt-14-2185-2021Residual temperature bias effects in stratospheric species distributions from LIMSE. Remsberg0V. L. Harvey1A. Krueger2M. Natarajan3Science Directorate, NASA Langley Research Center, 21 Langley Blvd, Mail Stop 401B, Hampton, VA 23681, USALaboratory for Atmospheric and Space Physics, University of Colorado Boulder, 3665 Discovery Drive, Boulder, CO 80303, USAEmeritus Senior Scientist, Code 614 Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USAScience Directorate, NASA Langley Research Center, 21 Langley Blvd, Mail Stop 401B, Hampton, VA 23681, USA<p>The Nimbus 7 Limb Infrared Monitor of the Stratosphere (LIMS) instrument operated from 25 October 1978 through 28 May 1979. Its version 6 (V6) profiles were processed and archived in 2002. We present several diagnostic examples of the quality of the V6 stratospheric species distributions based on their level 3 zonal Fourier coefficient products. In particular, we show that there are small differences in the ascending (<span class="inline-formula"><i>A</i></span>) minus descending (<span class="inline-formula"><i>D</i></span>) orbital temperature–pressure or <span class="inline-formula"><i>T</i>(<i>p</i></span>) profiles (their <span class="inline-formula"><i>A</i>−<i>D</i></span> values) that affect (<span class="inline-formula"><i>A</i>−<i>D</i></span>) species values. Systematic <span class="inline-formula"><i>A</i>−<i>D</i></span> biases in <span class="inline-formula"><i>T</i>(<i>p</i></span>) can arise from small radiance biases and/or from viewing anomalies along orbits. There can also be (<span class="inline-formula"><i>A</i>−<i>D</i></span>) differences in <span class="inline-formula"><i>T</i>(<i>p</i></span>) due to not resolving and correcting for all of the atmospheric temperature gradient along LIMS tangent view-paths. An error in <span class="inline-formula"><i>T</i>(<i>p</i></span>) affects species retrievals through (1) the Planck blackbody function in forward calculations of limb radiance that are part of the iterative retrieval algorithm of LIMS, and (2) the registration of the measured LIMS species radiance profiles in pressure altitude, mainly for the lower stratosphere. There are clear <span class="inline-formula"><i>A</i>−<i>D</i></span> differences for ozone, H<span class="inline-formula"><sub>2</sub></span>O, and HNO<span class="inline-formula"><sub>3</sub></span> but not for NO<span class="inline-formula"><sub>2</sub></span>. Percentage differences are larger in the lower stratosphere for ozone and H<span class="inline-formula"><sub>2</sub></span>O because those species are optically thick. We evaluate V6 ozone profile biases in the upper stratosphere with the aid of comparisons against a monthly climatology of UV–ozone soundings from rocketsondes. We also provide results of time series analyses of V6 ozone, H<span class="inline-formula"><sub>2</sub></span>O, and potential vorticity for the middle stratosphere to show that their average (<span class="inline-formula"><i>A</i>+<i>D</i></span>) V6 level 3 products provide a clear picture of the evolution of those tracers during Northern Hemisphere winter. We recommend that researchers use the average V6 level 3 product for their science studies of stratospheric ozone and H<span class="inline-formula"><sub>2</sub></span>O, while keeping in mind that there are uncorrected nonlocal thermodynamic equilibrium effects in daytime ozone in the lower mesosphere and in daytime H<span class="inline-formula"><sub>2</sub></span>O in the uppermost stratosphere. We also point out that the present-day Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment provides measurements and retrievals of temperature and ozone that are nearly free of anomalous diurnal variations and of effects from gradients at low and middle latitudes.</p>https://amt.copernicus.org/articles/14/2185/2021/amt-14-2185-2021.pdf |