Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions
Various parameterization schemes for the downward long-wave radiation at the Earth's surface which have been frequently applied in sea ice and snow cover models are tested with the aid of one year's measurements at the German stations "Koldewey" and "Neumayer" in the Ar...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Borntraeger
1994-12-01
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| Series: | Meteorologische Zeitschrift |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1127/metz/3/1994/343 |
| _version_ | 1827355800967839744 |
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| author | Gert König-Langlo Ernst Augstein |
| author_facet | Gert König-Langlo Ernst Augstein |
| author_sort | Gert König-Langlo |
| collection | DOAJ |
| description | Various parameterization schemes for the downward long-wave radiation at the Earth's surface which have been frequently applied in sea ice and snow cover models are tested with the aid of one year's measurements at the German stations "Koldewey" and "Neumayer" in the Arctic and Antarctic, respectively. All of these concepts are based on the Stefan-Boltzmann radiation law with an empirically derived effective atmospheric emissivity εA. Our data confirm the distinct dependency of the latter on cloudiness. But no other influences e.g. due to falling ice crystals (diamond dust) could be detected as significant. And the low level atmospheric water vapour pressure needs not be considered explicitly in the formulae. Thus, we propose a rather simple scheme for εA which is competable to the more sophisticated ones at least for polar regions. Our parameterization reproduces the observations with root mean square (RMS) deviations of less than 16 W/m2. |
| first_indexed | 2024-03-08T04:48:33Z |
| format | Article |
| id | doaj.art-476c2ece6f604fb8bf98e622d3f27f2f |
| institution | Directory Open Access Journal |
| issn | 0941-2948 |
| language | English |
| last_indexed | 2024-03-08T04:48:33Z |
| publishDate | 1994-12-01 |
| publisher | Borntraeger |
| record_format | Article |
| series | Meteorologische Zeitschrift |
| spelling | doaj.art-476c2ece6f604fb8bf98e622d3f27f2f2024-02-08T08:11:48ZengBorntraegerMeteorologische Zeitschrift0941-29481994-12-013634334710.1127/metz/3/1994/34389547Parameterization of the downward long-wave radiation at the Earth’s surface in polar regionsGert König-LangloErnst AugsteinVarious parameterization schemes for the downward long-wave radiation at the Earth's surface which have been frequently applied in sea ice and snow cover models are tested with the aid of one year's measurements at the German stations "Koldewey" and "Neumayer" in the Arctic and Antarctic, respectively. All of these concepts are based on the Stefan-Boltzmann radiation law with an empirically derived effective atmospheric emissivity εA. Our data confirm the distinct dependency of the latter on cloudiness. But no other influences e.g. due to falling ice crystals (diamond dust) could be detected as significant. And the low level atmospheric water vapour pressure needs not be considered explicitly in the formulae. Thus, we propose a rather simple scheme for εA which is competable to the more sophisticated ones at least for polar regions. Our parameterization reproduces the observations with root mean square (RMS) deviations of less than 16 W/m2.http://dx.doi.org/10.1127/metz/3/1994/343stefan-boltzmann radiation lawatmospheric emissivityice crystalsarcticantarcticstefan boltzmannsche strahlungsformelatmosphärische emissivitäteiskristallearktisantarktiskoldeweyneumayer |
| spellingShingle | Gert König-Langlo Ernst Augstein Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions Meteorologische Zeitschrift stefan-boltzmann radiation law atmospheric emissivity ice crystals arctic antarctic stefan boltzmannsche strahlungsformel atmosphärische emissivität eiskristalle arktis antarktis koldewey neumayer |
| title | Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions |
| title_full | Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions |
| title_fullStr | Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions |
| title_full_unstemmed | Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions |
| title_short | Parameterization of the downward long-wave radiation at the Earth’s surface in polar regions |
| title_sort | parameterization of the downward long wave radiation at the earth s surface in polar regions |
| topic | stefan-boltzmann radiation law atmospheric emissivity ice crystals arctic antarctic stefan boltzmannsche strahlungsformel atmosphärische emissivität eiskristalle arktis antarktis koldewey neumayer |
| url | http://dx.doi.org/10.1127/metz/3/1994/343 |
| work_keys_str_mv | AT gertkoniglanglo parameterizationofthedownwardlongwaveradiationattheearthssurfaceinpolarregions AT ernstaugstein parameterizationofthedownwardlongwaveradiationattheearthssurfaceinpolarregions |