A downscaling scheme for atmospheric varibles to drive soil-vegetation-atmosphere transfer models
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| Title: | Main Title: A downscaling scheme for atmospheric varibles to drive soil-vegetation-atmosphere transfer models |
| Description: | Abstract: For driving soil–vegetation–transfer models or hydrological models, high-resolution atmospheric forcing data is needed. For most applications the resolution of atmospheric model output is too coarse. To avoid biases due to the non-linear processes, a downscaling system should predict the unresolved variability of the atmospheric forcing. For this purpose we derived a disaggregation system consisting of three steps: (1) a bi-quadratic spline-interpolation of the low-resolution data, (2) a so-called ‘deterministic’ part, based on statistical rules between high-resolution surface variables and the desired atmospheric near-surface variables and (3) an autoregressive noise-generation step. The disaggregation system has been developed and tested based on high-resolution model output (400mhorizontal grid spacing).Anovel automatic search-algorithm has been developed for deriving the deterministic downscaling rules of step 2. When applied to the atmospheric variables of the lowest layer of the atmospheric COSMO-model, the disaggregation is able to adequately reconstruct the reference fields. Applying downscaling step 1 and 2, root mean square errors are decreased. Step 3 finally leads to a close match of the subgrid variability and temporal autocorrelation with the reference fields. The scheme can be applied to the output of atmospheric models, both for stand-alone offline simulations, and a fully coupled model system. |
| Identifier: | 10.1111/j.1600-0889.2010.00466.x (DOI) |
Responsible Party
| Creators: | Annika Schomburg (Author), Victor Venema (Author), Ralf Lindau (Author), Felix Ament (Author), Clemens Simmer (Author) |
| Publisher: | The International Meteorological Institute in Stockholm |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Atmosphere |
| Related Subproject: | C4 |
| Subjects: | Keywords: COSMO, Atmosphere, SVAT Modelling |
File Details
| Filename: | 2010_Schomburg_TellusB.pdf |
| Data Type: | Text - Article |
| Size: | 17 Pages |
| File Size: | 954 KB |
| Date: | Submitted: 15.06.2010 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Tellus B |
| Source Website: | www.tellusb.net |
| Issue: | 4 |
| Volume: | 62 |
| Number of Pages: | 17 (242 - 258) |
Metadata Details
| Metadata Creator: | Annika Schomburg |
| Metadata Created: | 03.12.2013 |
| Metadata Last Updated: | 03.12.2013 |
| Subproject: | C4 |
| Funding Phase: | 1 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 781 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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