Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions
Based on the atmospheric regional climate model HIRHAM5, the single-column model version HIRHAM5-SCM was developed and applied to investigate the performance of a relative humidity based (RH-Scheme) and a prognostic statistical cloud scheme (PS-Scheme) in the central Arctic. The surface pressure as...
Published in: | Atmosphere |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
MDPI AG
2012
|
Subjects: | |
Online Access: | https://doi.org/10.3390/atmos3030419 https://doaj.org/article/df4797ca6c054f5687f60398f90eed58 |
id |
ftdoajarticles:oai:doaj.org/article:df4797ca6c054f5687f60398f90eed58 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:df4797ca6c054f5687f60398f90eed58 2023-05-15T14:54:47+02:00 Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions Moritz Mielke Klaus Dethloff Annette Rinke Wolfgang Dorn Daniel Klaus 2012-08-01T00:00:00Z https://doi.org/10.3390/atmos3030419 https://doaj.org/article/df4797ca6c054f5687f60398f90eed58 EN eng MDPI AG http://www.mdpi.com/2073-4433/3/3/419 https://doaj.org/toc/2073-4433 doi:10.3390/atmos3030419 2073-4433 https://doaj.org/article/df4797ca6c054f5687f60398f90eed58 Atmosphere, Vol 3, Iss 3, Pp 419-450 (2012) cloud parameterization single-column climate model model evaluation sensitivity study Meteorology. Climatology QC851-999 article 2012 ftdoajarticles https://doi.org/10.3390/atmos3030419 2022-12-31T06:22:18Z Based on the atmospheric regional climate model HIRHAM5, the single-column model version HIRHAM5-SCM was developed and applied to investigate the performance of a relative humidity based (RH-Scheme) and a prognostic statistical cloud scheme (PS-Scheme) in the central Arctic. The surface pressure as well as dynamical tendencies of temperature, specific humidity, and horizontal wind were prescribed from the ERA-Interim data set to enable the simulation of a realistic annual cycle. Both modeled temperature and relative humidity profiles were validated against radio soundings carried out on the 35th North Pole drifting station (NP-35). Simulated total cloud cover was evaluated with NP-35 and satellite-based ISCCP-D2 and MODIS observations. The more sophisticated PS-Scheme was found to perform more realistically and matched the observations better. Nevertheless, the model systematically overestimated the monthly averaged total cloud cover. Sensitivity studies were conducted to assess the effect of modified “tuning” parameters on cloud-related model variables. Two tunable parameters of the PS-Scheme and six tuning parameters contained in the cloud microphysics were analyzed. Lower values of the PS-Scheme adjustment parameter q0 , which defines the shape of the symmetric beta distribution (acting as probability density function), as well as higher values of the cloud water threshold CW min or autoconversion rate γ 1 are able to reduce the overestimation of Arctic clouds. Furthermore, a lower cloud ice threshold γ thr , which controls the Bergeron–Findeisen process, improves model cloudiness and the ratio of liquid to solid water content. Article in Journal/Newspaper Arctic North Pole Directory of Open Access Journals: DOAJ Articles Arctic North Pole Atmosphere 3 3 419 450 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
cloud parameterization single-column climate model model evaluation sensitivity study Meteorology. Climatology QC851-999 |
spellingShingle |
cloud parameterization single-column climate model model evaluation sensitivity study Meteorology. Climatology QC851-999 Moritz Mielke Klaus Dethloff Annette Rinke Wolfgang Dorn Daniel Klaus Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions |
topic_facet |
cloud parameterization single-column climate model model evaluation sensitivity study Meteorology. Climatology QC851-999 |
description |
Based on the atmospheric regional climate model HIRHAM5, the single-column model version HIRHAM5-SCM was developed and applied to investigate the performance of a relative humidity based (RH-Scheme) and a prognostic statistical cloud scheme (PS-Scheme) in the central Arctic. The surface pressure as well as dynamical tendencies of temperature, specific humidity, and horizontal wind were prescribed from the ERA-Interim data set to enable the simulation of a realistic annual cycle. Both modeled temperature and relative humidity profiles were validated against radio soundings carried out on the 35th North Pole drifting station (NP-35). Simulated total cloud cover was evaluated with NP-35 and satellite-based ISCCP-D2 and MODIS observations. The more sophisticated PS-Scheme was found to perform more realistically and matched the observations better. Nevertheless, the model systematically overestimated the monthly averaged total cloud cover. Sensitivity studies were conducted to assess the effect of modified “tuning” parameters on cloud-related model variables. Two tunable parameters of the PS-Scheme and six tuning parameters contained in the cloud microphysics were analyzed. Lower values of the PS-Scheme adjustment parameter q0 , which defines the shape of the symmetric beta distribution (acting as probability density function), as well as higher values of the cloud water threshold CW min or autoconversion rate γ 1 are able to reduce the overestimation of Arctic clouds. Furthermore, a lower cloud ice threshold γ thr , which controls the Bergeron–Findeisen process, improves model cloudiness and the ratio of liquid to solid water content. |
format |
Article in Journal/Newspaper |
author |
Moritz Mielke Klaus Dethloff Annette Rinke Wolfgang Dorn Daniel Klaus |
author_facet |
Moritz Mielke Klaus Dethloff Annette Rinke Wolfgang Dorn Daniel Klaus |
author_sort |
Moritz Mielke |
title |
Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions |
title_short |
Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions |
title_full |
Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions |
title_fullStr |
Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions |
title_full_unstemmed |
Evaluation of Two Cloud Parameterizations and Their Possible Adaptation to Arctic Climate Conditions |
title_sort |
evaluation of two cloud parameterizations and their possible adaptation to arctic climate conditions |
publisher |
MDPI AG |
publishDate |
2012 |
url |
https://doi.org/10.3390/atmos3030419 https://doaj.org/article/df4797ca6c054f5687f60398f90eed58 |
geographic |
Arctic North Pole |
geographic_facet |
Arctic North Pole |
genre |
Arctic North Pole |
genre_facet |
Arctic North Pole |
op_source |
Atmosphere, Vol 3, Iss 3, Pp 419-450 (2012) |
op_relation |
http://www.mdpi.com/2073-4433/3/3/419 https://doaj.org/toc/2073-4433 doi:10.3390/atmos3030419 2073-4433 https://doaj.org/article/df4797ca6c054f5687f60398f90eed58 |
op_doi |
https://doi.org/10.3390/atmos3030419 |
container_title |
Atmosphere |
container_volume |
3 |
container_issue |
3 |
container_start_page |
419 |
op_container_end_page |
450 |
_version_ |
1766326542031388672 |