The diurnal cycle of the smoky marine boundary layer observed during August in the remote southeast Atlantic

Zhang, Jianhao; Zuidema, Paquita

doi:https://doi.org/10.5194/acp-19-14493-2019

Articles | Volume 19, issue 23

https://doi.org/10.5194/acp-19-14493-2019

© Author(s) 2019. 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-19-14493-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 23

Research article

| Highlight paper

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29 Nov 2019

Research article | Highlight paper |

| 29 Nov 2019

The diurnal cycle of the smoky marine boundary layer observed during August in the remote southeast Atlantic

Jianhao Zhang and Paquita Zuidema

Supplement

https://doi.org/10.5194/acp-19-14493-2019-supplement

Data sets

Balloon-borne sounding system (BBSS): Vaisala-processed winds, press R. Coulter, J. Kyrouac, and D. Holdridge https://doi.org/10.5439/1021460

Ceilometer (CEIL): cloud-base heights B. Ermold, and V. Morris https://doi.org/10.5439/1181954

Auxiliary data for the AOS Single Particle Soot Photometer C. Salwen, S. Springston, and A. Sedlacek https://doi.org/10.5439/1342138

C. Salwen, J. Uin, G. Senum, S. Springston, and E. Andrews AOS: Cloud Condensation Nuclei Counter https://doi.org/10.5439/1256093

Parsivel2 Laser Disdrometer Y. Shi and M. J. Bartholomew https://doi.org/10.5439/1150252

AOS: Carbon Monoxide Analyzer S. Springston https://doi.org/10.5439/1046183

Ka ARM Zenith Radar (KAZR): filtered spectral data, moderate sensitivity mode, co-polarized mode J. Hardin, D. Nelson, I. Lindenmaier, B. Isom, K. Johnson, A. Matthews, and N. Bharadwaj https://doi.org/10.5439/1095603

Microwave Radiometer Retrievals (MWRRET) of Cloud Liquid Water and Precipitable Water Vapor K. Gaustad and L. Riihimaki, L. https://doi.org/10.5439/1285691

G-band (183 GHz) Vapor Radiometer profiler: 15 microwave brightness temperatures from 170.0 to 183.3 GHz V. Ghate and M. Cadeddu https://doi.org/10.5439/1025199

Copernicus Climate Change Service (C3S) Fifth generation of ECMWF atmospheric reanalyses of the global climate https://doi.org/10.24381/cds.bd0915c6

Minnis Cloud Products Using Visst Algorithm P. Minnis https://adc.arm.gov/discovery/#v/results/s/fdpl::asivisstpxm10minnisX1.c1

SYN1deg-Day Ed4A NASA ASDC https://doi.org/10.5067/Terra+Aqua/CERES/SYN1degDAY_L3.004A

MODIS Level-3 NASA LAADS https://ladsweb.nascom.nasa.gov/

Met Office Integrated Data Archive System (MIDAS) Land and Marine Surface Stations Data UK Met Office http://catalogue.ceda.ac.uk/uuid/77910bcec71c820d4c92f40d3ed3f249

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Short summary

Boundary layer (BL) semi-direct effects in the remote SE Atlantic are investigated using LASIC field measurements and satellite retrievals. Low-cloud cover and cloud liquid water path decrease with increasing smoke loadings in the BL. Daily-mean surface-based mixed layer is warmer by 0.5 K, moisture accumulates near the surface throughout the night, and the BL deepens by 200 m, with LWPs and cloud top heights increasing, in the sunlit morning hours, as part of the smoke-altered BL diurnal cycle.