Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic: An Observational Analysis

Ian Chang; Lan Gao; Sharon P. Burton; Hong Chen; Michael S. Diamond; Richard A. Ferrare; Connor J. Flynn; Meloë Kacenelenbogen; Samuel E. LeBlanc; Kerry G. Meyer; Kristina Pistone; Sebastian Schmidt; Michal Segal-Rozenhaimer; Yohei Shinozuka; Robert Wood; Paquita Zuidema; Jens Redemann; Sundar A. Christopher

doi:10.1029/2020GL091469

Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic: An Observational Analysis

Ian Chang^*, Lan Gao, Sharon P. Burton, Hong Chen, Michael S. Diamond, Richard A. Ferrare, Connor J. Flynn, Meloë Kacenelenbogen, Samuel E. LeBlanc, Kerry G. Meyer, Kristina Pistone, Sebastian Schmidt, Michal Segal-Rozenhaimer, Yohei Shinozuka, Robert Wood, Paquita Zuidema, Jens Redemann, Sundar A. Christopher

^*Corresponding author for this work

School of the Environment and Earth Sciences

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14 Scopus citations

Abstract

The southeast Atlantic has expansive aerosol plumes overlying clouds for a third of each year. Aerosol optical depths (AODs) were measured from the airborne Sun photometer and lidar during the 2016 NASA ObseRvations of Aerosols above CLouds and their intEractionS field campaign. We compare these measurements with one another and with collocated Moderate Resolution Imaging Spectroradiometer (MODIS) observations at native spatial resolutions using <15-min and 3-h temporal collocation criteria. We find better statistical relationships for the <15-min temporal resolution, indicating that AODs in the southeast Atlantic commonly vary below three-hourly temporal scales over MODIS spatial resolutions. We also use the airborne Solar Spectral Flux Radiometer (SSFR) to conduct the first comprehensive evaluation of attenuation-corrected below-aerosol cloud optical depths (CODs) from MODIS and the Spinning Enhanced Visible and Infrared Imager (SEVIRI). MODIS COD retrievals improve their agreement with the SSFR when accounting for overlying aerosol attenuation whereas SEVIRI CODs are mostly underestimated.

Original language	English
Article number	e2020GL091469
Journal	Geophysical Research Letters
Volume	48
Issue number	7
DOIs	https://doi.org/10.1029/2020GL091469
State	Published - 16 Apr 2021

Funding

Funders	Funder number
National Aeronautics and Space Administration	ER-2, NNX15AN29H, NNH13ZDA001N‐EVS2

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10.1029/2020GL091469

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Chang, I., Gao, L., Burton, S. P., Chen, H., Diamond, M. S., Ferrare, R. A., Flynn, C. J., Kacenelenbogen, M., LeBlanc, S. E., Meyer, K. G., Pistone, K., Schmidt, S., Segal-Rozenhaimer, M., Shinozuka, Y., Wood, R., Zuidema, P., Redemann, J., & Christopher, S. A. (2021). Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic: An Observational Analysis. Geophysical Research Letters, 48(7), Article e2020GL091469. https://doi.org/10.1029/2020GL091469

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title = "Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic: An Observational Analysis",

abstract = "The southeast Atlantic has expansive aerosol plumes overlying clouds for a third of each year. Aerosol optical depths (AODs) were measured from the airborne Sun photometer and lidar during the 2016 NASA ObseRvations of Aerosols above CLouds and their intEractionS field campaign. We compare these measurements with one another and with collocated Moderate Resolution Imaging Spectroradiometer (MODIS) observations at native spatial resolutions using <15-min and 3-h temporal collocation criteria. We find better statistical relationships for the <15-min temporal resolution, indicating that AODs in the southeast Atlantic commonly vary below three-hourly temporal scales over MODIS spatial resolutions. We also use the airborne Solar Spectral Flux Radiometer (SSFR) to conduct the first comprehensive evaluation of attenuation-corrected below-aerosol cloud optical depths (CODs) from MODIS and the Spinning Enhanced Visible and Infrared Imager (SEVIRI). MODIS COD retrievals improve their agreement with the SSFR when accounting for overlying aerosol attenuation whereas SEVIRI CODs are mostly underestimated.",

author = "Ian Chang and Lan Gao and Burton, {Sharon P.} and Hong Chen and Diamond, {Michael S.} and Ferrare, {Richard A.} and Flynn, {Connor J.} and Melo{\"e} Kacenelenbogen and LeBlanc, {Samuel E.} and Meyer, {Kerry G.} and Kristina Pistone and Sebastian Schmidt and Michal Segal-Rozenhaimer and Yohei Shinozuka and Robert Wood and Paquita Zuidema and Jens Redemann and Christopher, {Sundar A.}",

year = "2021",

month = apr,

day = "16",

doi = "10.1029/2020GL091469",

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Chang, I, Gao, L, Burton, SP, Chen, H, Diamond, MS, Ferrare, RA, Flynn, CJ, Kacenelenbogen, M, LeBlanc, SE, Meyer, KG, Pistone, K, Schmidt, S, Segal-Rozenhaimer, M, Shinozuka, Y, Wood, R, Zuidema, P, Redemann, J & Christopher, SA 2021, 'Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic: An Observational Analysis', Geophysical Research Letters, vol. 48, no. 7, e2020GL091469. https://doi.org/10.1029/2020GL091469

TY - JOUR

T1 - Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic

T2 - An Observational Analysis

AU - Chang, Ian

AU - Gao, Lan

AU - Burton, Sharon P.

AU - Chen, Hong

AU - Diamond, Michael S.

AU - Ferrare, Richard A.

AU - Flynn, Connor J.

AU - Kacenelenbogen, Meloë

AU - LeBlanc, Samuel E.

AU - Meyer, Kerry G.

AU - Pistone, Kristina

AU - Schmidt, Sebastian

AU - Segal-Rozenhaimer, Michal

AU - Shinozuka, Yohei

AU - Wood, Robert

AU - Zuidema, Paquita

AU - Redemann, Jens

AU - Christopher, Sundar A.

PY - 2021/4/16

Y1 - 2021/4/16

N2 - The southeast Atlantic has expansive aerosol plumes overlying clouds for a third of each year. Aerosol optical depths (AODs) were measured from the airborne Sun photometer and lidar during the 2016 NASA ObseRvations of Aerosols above CLouds and their intEractionS field campaign. We compare these measurements with one another and with collocated Moderate Resolution Imaging Spectroradiometer (MODIS) observations at native spatial resolutions using <15-min and 3-h temporal collocation criteria. We find better statistical relationships for the <15-min temporal resolution, indicating that AODs in the southeast Atlantic commonly vary below three-hourly temporal scales over MODIS spatial resolutions. We also use the airborne Solar Spectral Flux Radiometer (SSFR) to conduct the first comprehensive evaluation of attenuation-corrected below-aerosol cloud optical depths (CODs) from MODIS and the Spinning Enhanced Visible and Infrared Imager (SEVIRI). MODIS COD retrievals improve their agreement with the SSFR when accounting for overlying aerosol attenuation whereas SEVIRI CODs are mostly underestimated.

AB - The southeast Atlantic has expansive aerosol plumes overlying clouds for a third of each year. Aerosol optical depths (AODs) were measured from the airborne Sun photometer and lidar during the 2016 NASA ObseRvations of Aerosols above CLouds and their intEractionS field campaign. We compare these measurements with one another and with collocated Moderate Resolution Imaging Spectroradiometer (MODIS) observations at native spatial resolutions using <15-min and 3-h temporal collocation criteria. We find better statistical relationships for the <15-min temporal resolution, indicating that AODs in the southeast Atlantic commonly vary below three-hourly temporal scales over MODIS spatial resolutions. We also use the airborne Solar Spectral Flux Radiometer (SSFR) to conduct the first comprehensive evaluation of attenuation-corrected below-aerosol cloud optical depths (CODs) from MODIS and the Spinning Enhanced Visible and Infrared Imager (SEVIRI). MODIS COD retrievals improve their agreement with the SSFR when accounting for overlying aerosol attenuation whereas SEVIRI CODs are mostly underestimated.

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SN - 0094-8276

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 7

M1 - e2020GL091469

ER -

Spatiotemporal Heterogeneity of Aerosol and Cloud Properties Over the Southeast Atlantic: An Observational Analysis

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