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Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa

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DOI

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Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa. / Mackie, Anna; Wild, Martin; Brindley, Helen; Folini, Doris; Palmer, Paul I.

In: Earth and Space Science, Vol. 7, No. 5, 05.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

Mackie, A, Wild, M, Brindley, H, Folini, D & Palmer, PI 2020, 'Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa', Earth and Space Science, vol. 7, no. 5. https://doi.org/10.1029/2019EA001017

APA

Mackie, A., Wild, M., Brindley, H., Folini, D., & Palmer, P. I. (2020). Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa. Earth and Space Science, 7(5). https://doi.org/10.1029/2019EA001017

Vancouver

Mackie A, Wild M, Brindley H, Folini D, Palmer PI. Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa. Earth and Space Science. 2020 May;7(5). https://doi.org/10.1029/2019EA001017

Author

Mackie, Anna ; Wild, Martin ; Brindley, Helen ; Folini, Doris ; Palmer, Paul I. / Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa. In: Earth and Space Science. 2020 ; Vol. 7, No. 5.

Bibtex - Download

@article{e322db07646e46b6b4c20b91b1b260f3,
title = "Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa",
abstract = "We explore the ability of general circulation models in the Coupled Model Intercomparison Project (CMIP5) to recreate observed seasonal variability in top‐of‐the‐atmosphere and surface radiation fluxes over West Africa. This tests CMIP5 models' ability to describe the radiative energy partitioning, which is fundamental to our understanding of the current climate and its future changes. We use 15 years of the monthly Clouds and the Earth's Radiant Energy System Energy Balanced and Filled (EBAF) product, alongside other satellite, reanalysis, and surface station products. We find that the CMIP5 multimodel mean is generally within the reference product range, with annual mean CMIP5 multimodel mean—EBAF of −0.5 W m−2 for top‐of‐the‐atmosphere reflected shortwave radiation, and 4.6 W m−2 in outgoing longwave radiation over West Africa. However, the range in annual mean of the model seasonal cycles is large (37.2 and 34.0 W m−2 for reflected shortwave radiation and outgoing longwave radiation, respectively). We use seasonal and regional contrasts in all‐sky fluxes to infer that the representation of the West African monsoon in numerical models affects radiative energy partitioning. Using clear‐sky surface fluxes, we find that the models tend to have more downwelling shortwave and less downwelling longwave radiation than EBAF, consistent with past research. We find models that are drier and have lower aerosol loading tend to show the largest differences. We find evidence that aerosol variability has a larger effect in modulating downwelling shortwave radiation than water vapor in EBAF, while the opposite effect is seen in the majority of CMIP5 models.",
keywords = "TOA radiation flux, CMIP5, West African monsoon, water vapor, aerosols",
author = "Anna Mackie and Martin Wild and Helen Brindley and Doris Folini and Palmer, {Paul I.}",
note = "e2019EA001017 10.1029/2019EA001017",
year = "2020",
month = may,
doi = "10.1029/2019EA001017",
language = "English",
volume = "7",
journal = "Earth and Space Science",
issn = "2333-5084",
publisher = "Wiley-Blackwell Publishing Ltd",
number = "5",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Observed and CMIP5-Simulated Radiative Flux Variability Over West Africa

AU - Mackie, Anna

AU - Wild, Martin

AU - Brindley, Helen

AU - Folini, Doris

AU - Palmer, Paul I.

N1 - e2019EA001017 10.1029/2019EA001017

PY - 2020/5

Y1 - 2020/5

N2 - We explore the ability of general circulation models in the Coupled Model Intercomparison Project (CMIP5) to recreate observed seasonal variability in top‐of‐the‐atmosphere and surface radiation fluxes over West Africa. This tests CMIP5 models' ability to describe the radiative energy partitioning, which is fundamental to our understanding of the current climate and its future changes. We use 15 years of the monthly Clouds and the Earth's Radiant Energy System Energy Balanced and Filled (EBAF) product, alongside other satellite, reanalysis, and surface station products. We find that the CMIP5 multimodel mean is generally within the reference product range, with annual mean CMIP5 multimodel mean—EBAF of −0.5 W m−2 for top‐of‐the‐atmosphere reflected shortwave radiation, and 4.6 W m−2 in outgoing longwave radiation over West Africa. However, the range in annual mean of the model seasonal cycles is large (37.2 and 34.0 W m−2 for reflected shortwave radiation and outgoing longwave radiation, respectively). We use seasonal and regional contrasts in all‐sky fluxes to infer that the representation of the West African monsoon in numerical models affects radiative energy partitioning. Using clear‐sky surface fluxes, we find that the models tend to have more downwelling shortwave and less downwelling longwave radiation than EBAF, consistent with past research. We find models that are drier and have lower aerosol loading tend to show the largest differences. We find evidence that aerosol variability has a larger effect in modulating downwelling shortwave radiation than water vapor in EBAF, while the opposite effect is seen in the majority of CMIP5 models.

AB - We explore the ability of general circulation models in the Coupled Model Intercomparison Project (CMIP5) to recreate observed seasonal variability in top‐of‐the‐atmosphere and surface radiation fluxes over West Africa. This tests CMIP5 models' ability to describe the radiative energy partitioning, which is fundamental to our understanding of the current climate and its future changes. We use 15 years of the monthly Clouds and the Earth's Radiant Energy System Energy Balanced and Filled (EBAF) product, alongside other satellite, reanalysis, and surface station products. We find that the CMIP5 multimodel mean is generally within the reference product range, with annual mean CMIP5 multimodel mean—EBAF of −0.5 W m−2 for top‐of‐the‐atmosphere reflected shortwave radiation, and 4.6 W m−2 in outgoing longwave radiation over West Africa. However, the range in annual mean of the model seasonal cycles is large (37.2 and 34.0 W m−2 for reflected shortwave radiation and outgoing longwave radiation, respectively). We use seasonal and regional contrasts in all‐sky fluxes to infer that the representation of the West African monsoon in numerical models affects radiative energy partitioning. Using clear‐sky surface fluxes, we find that the models tend to have more downwelling shortwave and less downwelling longwave radiation than EBAF, consistent with past research. We find models that are drier and have lower aerosol loading tend to show the largest differences. We find evidence that aerosol variability has a larger effect in modulating downwelling shortwave radiation than water vapor in EBAF, while the opposite effect is seen in the majority of CMIP5 models.

KW - TOA radiation flux

KW - CMIP5

KW - West African monsoon

KW - water vapor

KW - aerosols

U2 - 10.1029/2019EA001017

DO - 10.1029/2019EA001017

M3 - Article

VL - 7

JO - Earth and Space Science

JF - Earth and Space Science

SN - 2333-5084

IS - 5

ER -

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