Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus
October 17, 1997. Also issued as author's dissertation (Ph.D.) -- Colorado State University, 1997. Includes bibliographical references. A cloud-resolving model (CRM) version of RAMS, coupled to explicit bin resolving microphysics and a new two-stream radiative transfer code is used to study var...
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ftcolostateunidc:oai:mountainscholar.org:10217/234498 2023-05-15T14:50:07+02:00 Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus Harrington, Jerry Youngblood 2022-03-04T15:52:06Z reports application/pdf https://hdl.handle.net/10217/234498 English eng eng Colorado State University. Libraries Catalog record number (MMS ID): 991002755409703361 QC852 .C6 no. 637 Atmospheric Science Papers (Blue Books) Atmospheric science paper, no. 637 https://hdl.handle.net/10217/234498 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. Clouds -- Arctic regions -- Observations Stratus -- Arctic regions -- Observations Radiative transfer Text 2022 ftcolostateunidc 2023-03-23T18:34:29Z October 17, 1997. Also issued as author's dissertation (Ph.D.) -- Colorado State University, 1997. Includes bibliographical references. A cloud-resolving model (CRM) version of RAMS, coupled to explicit bin resolving microphysics and a new two-stream radiative transfer code is used to study various aspects of Arctic stratus clouds (ASC). The two-stream radiative transfer model is coupled in a consistent fashion to the bulk microphysical parameterization of Walko et al. (1995), an explicit liquid bin microphysical model (e.g., Feingold et al. 1996a) and a mixed-phase rnicrophysical model (Reisin et al., 1996). These models are used to study both warm (summer) season and transition (fall and spring) season ASC. Equations are developed for the inclusion of the radiative term in the drop growth equation and the effect is studied in a trajectory parcel model (TPM) and the CRM. Arctic stratus simulated with the new CRM framework compared well with the observations of Curry (1986). Along with CCN concentrations, it is shown that drop distribution shape and optical property methods strongly impact cloud evolution through their effect on the radiative properties. Broader cloud top distributions lead to clouds with more shallow depths and circulation strengths as more shortwave radiation is absorbed while the opposite occurs for narrow distribution functions. Radiative-cloud interactions using mean effective radii are shown to be problematic, while conserving re and N of the distribution function (as per Hu and Stamnes, 1993) produces similar cloud evolution as compared to detailed computations. Radiative effects on drop vapor deopsition growth can produce drizzle about 30 minutes earlier and is strongly dependent upon cloud top residence time of the parcels. The same set of trajectories assists drizzle production in the radiation and no-radiation cases. Not only is the growth of larger drops enhanced by the radiative effect, but drops with r < 10µm are caused to evaporate; the effects together constitute a ... Text Arctic Digital Collections of Colorado (Colorado State University) Arctic Stamnes ENVELOPE(9.020,9.020,63.443,63.443) |
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Open Polar |
collection |
Digital Collections of Colorado (Colorado State University) |
op_collection_id |
ftcolostateunidc |
language |
English |
topic |
Clouds -- Arctic regions -- Observations Stratus -- Arctic regions -- Observations Radiative transfer |
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Clouds -- Arctic regions -- Observations Stratus -- Arctic regions -- Observations Radiative transfer Harrington, Jerry Youngblood Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus |
topic_facet |
Clouds -- Arctic regions -- Observations Stratus -- Arctic regions -- Observations Radiative transfer |
description |
October 17, 1997. Also issued as author's dissertation (Ph.D.) -- Colorado State University, 1997. Includes bibliographical references. A cloud-resolving model (CRM) version of RAMS, coupled to explicit bin resolving microphysics and a new two-stream radiative transfer code is used to study various aspects of Arctic stratus clouds (ASC). The two-stream radiative transfer model is coupled in a consistent fashion to the bulk microphysical parameterization of Walko et al. (1995), an explicit liquid bin microphysical model (e.g., Feingold et al. 1996a) and a mixed-phase rnicrophysical model (Reisin et al., 1996). These models are used to study both warm (summer) season and transition (fall and spring) season ASC. Equations are developed for the inclusion of the radiative term in the drop growth equation and the effect is studied in a trajectory parcel model (TPM) and the CRM. Arctic stratus simulated with the new CRM framework compared well with the observations of Curry (1986). Along with CCN concentrations, it is shown that drop distribution shape and optical property methods strongly impact cloud evolution through their effect on the radiative properties. Broader cloud top distributions lead to clouds with more shallow depths and circulation strengths as more shortwave radiation is absorbed while the opposite occurs for narrow distribution functions. Radiative-cloud interactions using mean effective radii are shown to be problematic, while conserving re and N of the distribution function (as per Hu and Stamnes, 1993) produces similar cloud evolution as compared to detailed computations. Radiative effects on drop vapor deopsition growth can produce drizzle about 30 minutes earlier and is strongly dependent upon cloud top residence time of the parcels. The same set of trajectories assists drizzle production in the radiation and no-radiation cases. Not only is the growth of larger drops enhanced by the radiative effect, but drops with r < 10µm are caused to evaporate; the effects together constitute a ... |
format |
Text |
author |
Harrington, Jerry Youngblood |
author_facet |
Harrington, Jerry Youngblood |
author_sort |
Harrington, Jerry Youngblood |
title |
Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus |
title_short |
Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus |
title_full |
Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus |
title_fullStr |
Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus |
title_full_unstemmed |
Effects of radiative and microphysical processes on simulated warm and transition season Arctic stratus |
title_sort |
effects of radiative and microphysical processes on simulated warm and transition season arctic stratus |
publisher |
Colorado State University. Libraries |
publishDate |
2022 |
url |
https://hdl.handle.net/10217/234498 |
long_lat |
ENVELOPE(9.020,9.020,63.443,63.443) |
geographic |
Arctic Stamnes |
geographic_facet |
Arctic Stamnes |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Catalog record number (MMS ID): 991002755409703361 QC852 .C6 no. 637 Atmospheric Science Papers (Blue Books) Atmospheric science paper, no. 637 https://hdl.handle.net/10217/234498 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
_version_ |
1766321186177810432 |