A meteorological overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) campaign over the southeastern Atlantic during 2016–2018: Part 1 – Climatology

Ryoo, Ju-Mee; Pfister, Leonhard; Ueyama, Rei; Zuidema, Paquita; Wood, Robert; Chang, Ian; Redemann, Jens

doi:https://doi.org/10.5194/acp-21-16689-2021

Articles | Volume 21, issue 22

https://doi.org/10.5194/acp-21-16689-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

New observations and related modelling studies of the aerosol–cloud–climate...

https://doi.org/10.5194/acp-21-16689-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 22

Research article

|

16 Nov 2021

Research article |

| 16 Nov 2021

A meteorological overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) campaign over the southeastern Atlantic during 2016–2018: Part 1 – Climatology

Ju-Mee Ryoo, Leonhard Pfister, Rei Ueyama, Paquita Zuidema, Robert Wood, Ian Chang, and Jens Redemann

Supplement

https://doi.org/10.5194/acp-21-16689-2021-supplement

Data sets

MODIS Atmosphere L3 Monthly Product (08_L3). NASA MODIS Adaptive Processing System (Aqua) S. Platnick, P. Hubanks, K. Meyer, and M. D. King https://doi.org/10.5067/MODIS/MYD08_M3.006

MODIS Atmosphere L3 Monthly Product (08_L3). NASA MODIS Adaptive Processing System (Terra) S. Platnick, P. Hubanks, K. Meyer, and M. D. King https://doi.org/10.5067/MODIS/MYD08_M3.006

JRA-55: Japanese 55-year Reanalysis, Monthly Means and Variances Japan Meteorological Agency/Japan https://doi.org/10.5065/D60G3H5B

Moffett Field ORACLES Science Team https://doi.org/10.5067/Suborbital/ORACLES/P3/2016_V2

Moffett Field ORACLES Science Team https://doi.org/10.5067/Suborbital/ORACLES/P3/2017_V2

Moffett Field ORACLES Science Team https://doi.org/10.5067/Suborbital/ORACLES/P3/2018_V2

Short summary

Part 1 of the meteorological overview paper highlights the anomalous meteorological characteristics during the ORACLES deployment compared to the climatological mean at monthly timescales. The upper-level wave disturbance and the associated anomalous circulation explain the weakening of AEJ-S through the reduction of the strength of the heat low over the land during August 2017. This may also help explain the anomalously low aerosol optical depth observed in the August 2017 ORACLES deployment.