Diurnal carbon monoxide observed from a geostationary infrared hyperspectral sounder: first result from GIIRS on board FengYun-4B
-
Published:2023-06-20
Issue:12
Volume:16
Page:3059-3083
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Zeng Zhao-ChengORCID, Lee LuORCID, Qi Chengli
Abstract
Abstract. The Geostationary Interferometric Infrared Sounder (GIIRS) on board FengYun-4 series satellites is the world's first geostationary hyperspectral infrared sounder. With hyperspectral measurement collected from a geostationary orbit covering the carbon monoxide (CO) absorption window around 2150 cm−1, GIIRS provides a unique opportunity
for monitoring the diurnal variabilities of atmospheric CO over eastern Asia.
In this study, we develop the FengYun Geostationary satellite Atmospheric
Infrared Retrieval (FY-GeoAIR) algorithm to retrieve the CO profiles using
observations from GIIRS on board FY-4B, which was launched in June 2021, and
provide CO maps at a spatial resolution of 12 km and a temporal resolution
of 2 h. The performance of the algorithm is first evaluated by conducting retrieval experiments using simulated synthetic spectra. The result shows that the GIIRS data provide significant information for constraining CO profiles. The degree of freedom for signal (DOFS) and retrieval error are both highly correlated with thermal contrast (TC), the temperature difference between the surface and the lower atmosphere. Retrieval results from 1 month of GIIRS spectra in July 2022 show that the DOFS for the majority is between 0.8 and 1.5 for the CO total column and between 0 and 0.8 for the bottom three layers ranging from the surface to 3 km a.s.l. Consistent with CO retrievals from low-Earth-orbit (LEO) infrared
sounders, the largest observation sensitivity, as quantified by the
averaging kernel (AK), is in the free troposphere at around 3–6 km. The
diurnal changes in DOFS and vertical sensitivity of observation are
primarily driven by the diurnal TC variabilities. Finally, we compare the CO total columns between GIIRS and Infrared Atmospheric
Sounding Interferometer (IASI) and find that the two datasets show
good consistency in capturing the spatial and temporal variabilities. This
study demonstrates that the GIIRS retrievals are able to reproduce the
temporal variability of CO total columns over eastern Asia in the daytime in
July. Nevertheless, the retrievals have low detectivity in the nighttime due
to their weak sensitivity to the ground level CO changes limited by low
information content. Model assimilation that takes into account the
retrieved diurnal CO profiles and the associated vertical sensitivity will
have potential in improving local and global air quality and climate
research over eastern Asia.
Funder
National Natural Science Foundation of China National Key Research and Development Program of China Fundamental Research Funds for the Central Universities of Beijing University of Chemical Technology China Meteorological Administration
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference63 articles.
1. Bauduin, S., Clarisse, L., Theunissen, M., George, M., Hurtmans, D.,
Clerbaux, C., and Coheur, P.-F.: IASI's sensitivity to near-surface carbon
monoxide (CO): Theoretical analyses and retrievals on test cases, J. Quant.
Spectrosc. Ra., 189, 428–440, https://doi.org/10.1016/j.jqsrt.2016.12.022, 2017. 2. Barret, B., Turquety, S., Hurtmans, D., Clerbaux, C., Hadji-Lazaro, J., Bey, I., Auvray, M., and Coheur, P.-F.: Global carbon monoxide vertical distributions from spaceborne high-resolution FTIR nadir measurements, Atmos. Chem. Phys., 5, 2901–2914, https://doi.org/10.5194/acp-5-2901-2005, 2005. 3. Borsdorff, T., Aan de Brugh, J., Hu, H., Aben, I., Hasekamp, O., and
Landgraf, J.: Measuring carbon monoxide with TROPOMI: First results and a
comparison with ECMWF- IFS analysis data, Geophys. Res. Lett., 45, 2826–2832, https://doi.org/10.1002/2018GL077045, 2018. 4. Brenninkmeijer, C. A. M. and Novelli, P. C.: Carbon monoxide, in:
Encyclopedia Atmospheric Sciences, edited by: Holton, J. R., Academic Press,
an imprint of Elsevier Science, London, 2389–2396, ISBN: 978-0-12-227090-1, 2003. 5. Buchwitz, M., de Beek, R., Noël, S., Burrows, J. P., Bovensmann, H., Bremer, H., Bergamaschi, P., Körner, S., and Heimann, M.: Carbon monoxide, methane and carbon dioxide columns retrieved from SCIAMACHY by WFM-DOAS: year 2003 initial data set, Atmos. Chem. Phys., 5, 3313–3329, https://doi.org/10.5194/acp-5-3313-2005, 2005.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|