Atmospheric optical properties and meteorological conditions

Fenn, Robert W.; Shettle, E. P.; Hering, Wayne S.; Johnson, Richard W.

doi:10.1016/0004-6981(81)90225-0

Cited by 14 publications

(6 citation statements)

References 2 publications

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“…Deposition nucleation on fungal spores is not considered, because the observational data are missing. As there are no data available about shortwave and longwave radiative properties of fungal spores, but they have a similar refractive index as sea salt (Ebert et al 2002) the identical data as for sea salt (Fenn et al 1981) were assumed for fungal spore shortwave and longwave radiative properties. The standard deviation of the fungal spore distribution was set to 2, equal to that of bacteria.…”

Section: Model Setupmentioning

confidence: 99%

Modelling the impact of fungal spore ice nuclei on clouds and precipitation

Sesartić

Lohmann

Storelvmo

2013

Environ. Res. Lett.

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Some fungal spore species have been found in laboratory studies to be very efficient ice nuclei. However, their potential impact on clouds and precipitation is not well known and needs to be investigated. Fungal spores as a new aerosol species were introduced into the global climate model (GCM) ECHAM5-HAM. The inclusion of fungal spores acting as ice nuclei in a GCM leads to only minor changes in cloud formation and precipitation on a global level; however, changes in the liquid water path and ice water path as well as stratiform precipitation can be observed in the boreal regions where tundra and forests act as sources of fungal spores. Although fungal spores contribute to heterogeneous freezing, their impact is reduced by their low numbers as compared to other heterogeneous ice nuclei.

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Section: Model Setupmentioning

confidence: 99%

Modelling the impact of fungal spore ice nuclei on clouds and precipitation

Sesartić

Lohmann

Storelvmo

2013

Environ. Res. Lett.

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“…As there were no data available about shortwave and longwave radiative properties of bacteria, but they have a similar refractive index as sea salt (Wyatt, 1970;Ebert et al, 2002), the identical data as for sea salt (Fenn et al, 1981) were assumed for the optical properties of bacteria. The standard deviation of the bacterial distribution was set to 2, equal to that of dust.…”

Section: Bacteria In Echam5-hammentioning

confidence: 99%

Bacteria in the ECHAM5-HAM global climate model

2012

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Abstract. Some bacteria are among the most active ice nuclei found in nature due to the ice nucleation active proteins on their surface, which serve as active sites for ice nucleation. Their potential impact on clouds and precipitation is not well known and needs to be investigated. Bacteria as a new aerosol species were introduced into the global climate model (GCM) ECHAM5-HAM. The inclusion of bacteria acting as ice nuclei in a GCM leads to only minor changes in cloud formation and precipitation on a global level, however, changes in the liquid water path and ice water path are simulated, specifically in the boreal regions where tundra and forests act as sources of bacteria. Although bacteria contribute to heterogeneous freezing, their impact is reduced by their low numbers compared to other heterogeneous IN. This result confirms the outcome of several previous studies.

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“…Phys., 5, 1125-1156, doi:10.5194/acp-5-1125. 1461, 1463: Aerosol influence on mixed-phase clouds in CAM-Oslo, J. Atmos. Sci., 65, 3214-3230, doi:10.1175.2430.1, 2008.…”

Section: Discussionunclassified

“…Deposition nucleation on bacteria is not considered, because the observational data are missing. As there were no data available about shortwave and longwave radiative properties of bacteria, but they have a similar refractive index as sea salt (Wyatt, 1970;Ebert et al, 2002), the identical data as for sea salt (Fenn et al, 1981) were assumed for bacterial shortwave and longwave radiative properties. The standard deviation of the bacterial distribution was set to 2, equal to that of dust.…”

Section: Bacteria In Echam5-hammentioning

confidence: 99%

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Bacteria in the ECHAM5-HAM global climate model

Sesartić¹,

Lohmann²,

Storelvmo³

2011

Preprint

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Bacteria are the most active naturally occuring ice nuclei (IN) due to the ice nucleation active proteins on their surface, which serve as active sites for ice nucleation. Their potential impact on clouds and precipitation is not well known and needs to be investigated. Bacteria as a new aerosol species were introduced into the global climate model (GCM) ECHAM5-HAM. The inclusion of bacteria acting as IN in a GCM leads to only minor changes in cloud formation and precipitation on a global level, however, changes in the liquid water path and ice water path can be observed, specifically in the boreal regions where tundra and forests act as sources of bacteria

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Atmospheric optical properties and meteorological conditions

Cited by 14 publications

References 2 publications

Modelling the impact of fungal spore ice nuclei on clouds and precipitation

Modelling the impact of fungal spore ice nuclei on clouds and precipitation

Bacteria in the ECHAM5-HAM global climate model

Bacteria in the ECHAM5-HAM global climate model

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