The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems
<p>Convective cloud systems in the maritime tropics play a critical role in global climate, but accurately representing aerosol interactions within these clouds persists as a major challenge for weather and climate modelling. We quantify the effect of ice-nucleating particles (INPs) on the rad...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-04-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/21/5439/2021/acp-21-5439-2021.pdf |
| _version_ | 1818436119348379648 |
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| author | R. E. Hawker A. K. Miltenberger A. K. Miltenberger J. M. Wilkinson A. A. Hill B. J. Shipway Z. Cui R. J. Cotton K. S. Carslaw P. R. Field P. R. Field B. J. Murray |
| author_facet | R. E. Hawker A. K. Miltenberger A. K. Miltenberger J. M. Wilkinson A. A. Hill B. J. Shipway Z. Cui R. J. Cotton K. S. Carslaw P. R. Field P. R. Field B. J. Murray |
| author_sort | R. E. Hawker |
| collection | DOAJ |
| description | <p>Convective cloud systems in the maritime tropics play a critical role in
global climate, but accurately representing aerosol interactions within
these clouds persists as a major challenge for weather and climate
modelling. We quantify the effect of ice-nucleating particles (INPs) on the
radiative properties of a complex tropical Atlantic deep convective cloud
field using a regional model with an advanced double-moment microphysics
scheme. Our results show that the domain-mean daylight outgoing radiation
varies by up to 18 W m<span class="inline-formula"><sup>−2</sup></span> depending on the chosen INP parameterisation.
The key distinction between different INP parameterisations is the
temperature dependence of ice formation, which alters the vertical
distribution of cloud microphysical processes. The controlling effect of the
INP temperature dependence is substantial even in the presence of
Hallett–Mossop secondary ice production, and the effects of secondary ice
formation depend strongly on the chosen INP parameterisation. Our results
have implications for climate model simulations of tropical clouds and
radiation, which currently do not consider a link between INP particle type
and ice water content. The results also provide a challenge to the INP
measurement community, as we demonstrate that INP concentration
measurements are required over the full mixed-phase temperature regime,
which covers around 10 orders of magnitude.</p> |
| first_indexed | 2024-12-14T17:03:43Z |
| format | Article |
| id | doaj.art-2541e748a7f34cfeac1e149d142d1ed1 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-14T17:03:43Z |
| publishDate | 2021-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-2541e748a7f34cfeac1e149d142d1ed12022-12-21T22:53:46ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242021-04-01215439546110.5194/acp-21-5439-2021The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systemsR. E. Hawker0A. K. Miltenberger1A. K. Miltenberger2J. M. Wilkinson3A. A. Hill4B. J. Shipway5Z. Cui6R. J. Cotton7K. S. Carslaw8P. R. Field9P. R. Field10B. J. Murray11Institute for Climate and Atmospheric Science, University of Leeds, Leeds LS2 9JT, United KingdomInstitute for Climate and Atmospheric Science, University of Leeds, Leeds LS2 9JT, United Kingdomnow at: Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Mainz 55128, GermanyMet Office, Exeter EX1 3PB, United KingdomMet Office, Exeter EX1 3PB, United KingdomMet Office, Exeter EX1 3PB, United KingdomInstitute for Climate and Atmospheric Science, University of Leeds, Leeds LS2 9JT, United KingdomMet Office, Exeter EX1 3PB, United KingdomInstitute for Climate and Atmospheric Science, University of Leeds, Leeds LS2 9JT, United KingdomInstitute for Climate and Atmospheric Science, University of Leeds, Leeds LS2 9JT, United KingdomMet Office, Exeter EX1 3PB, United KingdomInstitute for Climate and Atmospheric Science, University of Leeds, Leeds LS2 9JT, United Kingdom<p>Convective cloud systems in the maritime tropics play a critical role in global climate, but accurately representing aerosol interactions within these clouds persists as a major challenge for weather and climate modelling. We quantify the effect of ice-nucleating particles (INPs) on the radiative properties of a complex tropical Atlantic deep convective cloud field using a regional model with an advanced double-moment microphysics scheme. Our results show that the domain-mean daylight outgoing radiation varies by up to 18 W m<span class="inline-formula"><sup>−2</sup></span> depending on the chosen INP parameterisation. The key distinction between different INP parameterisations is the temperature dependence of ice formation, which alters the vertical distribution of cloud microphysical processes. The controlling effect of the INP temperature dependence is substantial even in the presence of Hallett–Mossop secondary ice production, and the effects of secondary ice formation depend strongly on the chosen INP parameterisation. Our results have implications for climate model simulations of tropical clouds and radiation, which currently do not consider a link between INP particle type and ice water content. The results also provide a challenge to the INP measurement community, as we demonstrate that INP concentration measurements are required over the full mixed-phase temperature regime, which covers around 10 orders of magnitude.</p>https://acp.copernicus.org/articles/21/5439/2021/acp-21-5439-2021.pdf |
| spellingShingle | R. E. Hawker A. K. Miltenberger A. K. Miltenberger J. M. Wilkinson A. A. Hill B. J. Shipway Z. Cui R. J. Cotton K. S. Carslaw P. R. Field P. R. Field B. J. Murray The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems Atmospheric Chemistry and Physics |
| title | The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems |
| title_full | The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems |
| title_fullStr | The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems |
| title_full_unstemmed | The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems |
| title_short | The temperature dependence of ice-nucleating particle concentrations affects the radiative properties of tropical convective cloud systems |
| title_sort | temperature dependence of ice nucleating particle concentrations affects the radiative properties of tropical convective cloud systems |
| url | https://acp.copernicus.org/articles/21/5439/2021/acp-21-5439-2021.pdf |
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