ObseRvations of Aerosols above CLouds and their intEractionS

Southern Africa produces almost one-third of the Earth’s biomass burning aerosol particles. The ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) experiment was a five year investigation with three intensive observation periods (August 19, 2016 – October 27, 2016; August 1, 2017 – September 4, 2017; September 21, 2018 – October 27, 2018) and was designed to study key processes that determine the climate impacts of African biomass burning aerosols. ORACLES provided multi-year airborne observations over the complete vertical column of the key parameters that drive aerosol-cloud interactions in the southeast Atlantic, an area with some of the largest inter-model differences in aerosol forcing assessments. These inter-model differences in aerosol and cloud distributions, as well as their combined climatic effects in the SE Atlantic are partly due to the persistence of aerosols above clouds. The varying separation of cloud and aerosol layers sampled during ORACLES allow for a process-oriented understanding of how variations in radiative heating profiles impact cloud properties, which is expected to improve model simulations for other remote regions experience long-range aerosol transport above clouds. ORACLES utilized two NASA aircraft, the P-3 and ER-2. The P-3 was used as a low-flying platform for simultaneous in situ and remote sensing measurements of aerosols and clouds in all three campaigns, supplemented by ER-2 remote sensing in 2016. ER-2 observations will be used to enhance satellite-based remote sensing by resolving variability within a particular scene, and by guiding the development of new and improved remote sensing techniques.

DOI: 10.5067/SUBORBITAL/ORACLES/DATA001

For more information regarding the Airborne Multi-angle SpectroPolarimetric Imager (AirMSPI) data collected during ORACLES, please refer to: AirMSPI ORACLES Ellipsoid Data, AirMSPI ORACLES Terrain Data, and AirMSPI Cloud Droplet Size and Cloud Optical Depth Product.

Disciplines:   Field Campaigns

ORACLES Publications

Redemann J, Wood R, Zuidema P, Doherty S J, Luna B, LeBlanc S E, Diamond M S, Shinozuka Y, Chang I Y, Ueyama R, Pfister L, Ryoo J-M, Dobracki A N, da Silva A M, Longo K M, Kacenelenbogen M S, Flynn C J, Pistone K, Knox N M, Piketh S J, Haywood J M, Formenti P, Mallet M, Stier P, Ackerman A S, Bauer S E, Fridlind A M, Carmichael G R, Saide P E, Ferrada G A, Howell S G, Freitag S, Cairns B, Holben B N, Knobelspiesse K D, Tanelli S, L’Ecuyer T S, Dzambo A M, Sy O O, McFarquhar G M, Poellot M R, Gupta S, et al. (2021). An overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project: aerosol–cloud–radiation interactions in the southeast Atlantic basin. Atmospheric Chemistry and Physics, 21 (3), 1507. http://dx.doi.org/10.5194/acp-21-1507-2021


Collection Disciplines Spatial Temporal
ORACLES_Aerosol_AircraftInSitu_Data_1
ORACLES Aerosol Aircraft InSitu Data
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-08-24 - 2018-10-27
Temporal Resolution:
Variable
ORACLES_AerosolCloud_AircraftRemoteSensing_Data_1
ORACLES Aerosol Cloud Aircraft Remote Sensing Data
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-07-28 - 2018-10-27
Temporal Resolution:
Variable
ORACLES_Cloud_AircraftInSitu_Data_1
ORACLES Cloud Aircraft InSitu Data
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-08-24 - 2018-10-27
Temporal Resolution:
Variable
ORACLES_MetNav_AircraftInSitu_Data_1
ORACLES Navigational and Meteorological Data
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-08-02 - 2018-10-27
Temporal Resolution:
Variable
ORACLES_Model_Data_1
ORACLES Model Derived Measurements
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-08-27 - 2018-10-25
ORACLES_Radiation_AircraftInSitu_Data_1
ORACLES Radiation Aircraft InSitu Data
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-08-19 - 2018-10-27
Temporal Resolution:
Variable
ORACLES_TraceGas_AircraftInSitu_Data_1
ORACLES Trace Gas Aircraft InSitu Data
Field Campaigns Spatial Coverage:
(-35, 25), (-35, 25)
Temporal Coverage:
2016-08-19 - 2018-10-27
Temporal Resolution:
Variable