The CLoud–Aerosol–Radiation Interaction and Forcing:  Year 2017 (CLARIFY-2017) measurement campaign

J. M. Haywood; J. M. Haywood; S. J. Abel; P. A. Barrett; N. Bellouin; A. Blyth; K. N. Bower; M. Brooks; K. Carslaw; H. Che; H. Che; H. Coe; M. I. Cotterell; M. I. Cotterell; I. Crawford; Z. Cui; N. Davies; N. Davies; B. Dingley; B. Dingley; P. Field; P. Field; P. Formenti; H. Gordon; H. Gordon; M. de Graaf; R. Herbert; B. Johnson; A. C. Jones; A. C. Jones; J. M. Langridge; F. Malavelle; F. Malavelle; D. G. Partridge; F. Peers; F. Peers; J. Redemann; P. Stier; K. Szpek; J. W. Taylor; D. Watson-Parris; R. Wood; H. Wu; P. Zuidema

doi:10.5194/acp-21-1049-2021

Atmospheric Chemistry and Physics (Jan 2021)

The CLoud–Aerosol–Radiation Interaction and Forcing: Year 2017 (CLARIFY-2017) measurement campaign

J. M. Haywood,
J. M. Haywood,
S. J. Abel,
P. A. Barrett,
N. Bellouin,
A. Blyth,
K. N. Bower,
M. Brooks,
K. Carslaw,
H. Che,
H. Che,
H. Coe,
M. I. Cotterell,
M. I. Cotterell,
I. Crawford,
Z. Cui,
N. Davies,
N. Davies,
B. Dingley,
B. Dingley,
P. Field,
P. Field,
P. Formenti,
H. Gordon,
H. Gordon,
M. de Graaf,
R. Herbert,
B. Johnson,
A. C. Jones,
A. C. Jones,
J. M. Langridge,
F. Malavelle,
F. Malavelle,
D. G. Partridge,
F. Peers,
F. Peers,
J. Redemann,
P. Stier,
K. Szpek,
J. W. Taylor,
D. Watson-Parris,
R. Wood,
H. Wu,
P. Zuidema

Affiliations

J. M. Haywood: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
J. M. Haywood: Met Office, Exeter, EX1 3PB, UK
S. J. Abel: Met Office, Exeter, EX1 3PB, UK
P. A. Barrett: Met Office, Exeter, EX1 3PB, UK
N. Bellouin: Department of Meteorology, University of Reading, Reading, RG6 6BB, UK
A. Blyth: School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
K. N. Bower: Department of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK
M. Brooks: Met Office, Exeter, EX1 3PB, UK
K. Carslaw: School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
H. Che: Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Oxford, OX1 3PU, UK
H. Che: now at: Department of Geophysics, Tel Aviv University, Tel Aviv, Israel
H. Coe: Department of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK
M. I. Cotterell: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
M. I. Cotterell: now at: School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK
I. Crawford: Department of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK
Z. Cui: School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
N. Davies: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
N. Davies: now at: Haseltine Lake Kempner, Bristol, BS1 6HU, UK
B. Dingley: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
B. Dingley: Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Oxford, OX1 3PU, UK
P. Field: Met Office, Exeter, EX1 3PB, UK
P. Field: School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
P. Formenti: LISA, UMR CNRS 7583, Université Paris-Est-Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL), Créteil, France
H. Gordon: School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
H. Gordon: now at: Engineering Research Accelerator, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
M. de Graaf: KNMI, De Bilt, 3731, the Netherlands
R. Herbert: Department of Meteorology, University of Reading, Reading, RG6 6BB, UK
B. Johnson: Met Office, Exeter, EX1 3PB, UK
A. C. Jones: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
A. C. Jones: Met Office, Exeter, EX1 3PB, UK
J. M. Langridge: Met Office, Exeter, EX1 3PB, UK
F. Malavelle: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
F. Malavelle: Met Office, Exeter, EX1 3PB, UK
D. G. Partridge: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
F. Peers: College of Engineering, Mathematics and Physical Science, University of Exeter, Exeter, EX4 4QE, UK
F. Peers: now at: Laboratoire d'Optique Atmosphérique Université de Lille, 59655 Villeneuve d'Ascq CEDEX, France
J. Redemann: School of Meteorology, University of Oklahoma, Norman, Oklahoma, USA
P. Stier: Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Oxford, OX1 3PU, UK
K. Szpek: Met Office, Exeter, EX1 3PB, UK
J. W. Taylor: Department of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK
D. Watson-Parris: Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Oxford, OX1 3PU, UK
R. Wood: Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
H. Wu: Department of Earth and Environmental Sciences, University of Manchester, Manchester, M13 9PL, UK
P. Zuidema: Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida, USA

DOI: https://doi.org/10.5194/acp-21-1049-2021
Journal volume & issue: Vol. 21
pp. 1049 – 1084

Abstract

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The representations of clouds, aerosols, and cloud–aerosol–radiation impacts remain some of the largest uncertainties in climate change, limiting our ability to accurately reconstruct past climate and predict future climate. The south-east Atlantic is a region where high atmospheric aerosol loadings and semi-permanent stratocumulus clouds are co-located, providing an optimum region for studying the full range of aerosol–radiation and aerosol–cloud interactions and their perturbations of the Earth's radiation budget. While satellite measurements have provided some useful insights into aerosol–radiation and aerosol–cloud interactions over the region, these observations do not have the spatial and temporal resolution, nor the required level of precision to allow for a process-level assessment. Detailed measurements from high spatial and temporal resolution airborne atmospheric measurements in the region are very sparse, limiting their use in assessing the performance of aerosol modelling in numerical weather prediction and climate models. CLARIFY-2017 was a major consortium programme consisting of five principal UK universities with project partners from the UK Met Office and European- and USA-based universities and research centres involved in the complementary ORACLES, LASIC, and AEROCLO-sA projects. The aims of CLARIFY-2017 were fourfold: (1) to improve the representation and reduce uncertainty in model estimates of the direct, semi-direct, and indirect radiative effect of absorbing biomass burning aerosols; (2) to improve our knowledge and representation of the processes determining stratocumulus cloud microphysical and radiative properties and their transition to cumulus regimes; (3) to challenge, validate, and improve satellite retrievals of cloud and aerosol properties and their radiative impacts; (4) to improve the impacts of aerosols in weather and climate numerical models. This paper describes the modelling and measurement strategies central to the CLARIFY-2017 deployment of the FAAM BAe146 instrumented aircraft campaign, summarizes the flight objectives and flight patterns, and highlights some key results from our initial analyses.

Published in Atmospheric Chemistry and Physics

ISSN: 1680-7316 (Print); 1680-7324 (Online)
Publisher: Copernicus Publications
Country of publisher: Germany
LCC subjects: Science: Physics; Science: Chemistry
Website: http://www.atmospheric-chemistry-and-physics.net/

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