[747] - A downscaling scheme for atmospheric varibles to drive soil-vegetation-atmosphere transfer models

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Schomburg, A., Venema, V., Lindau, R., Ament, F., Simmer, C., 2010. A downscaling scheme for atmospheric varibles to drive soil-vegetation-atmosphere transfer models. Tellus B, 62 (4), 242 - 258. DOI: 10.1111/j.1600-0889.2010.00466.x.
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Title(s):Main Title: A downscaling scheme for atmospheric varibles to drive soil-vegetation-atmosphere transfer models
Description(s):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(s):DOI: 10.1111/j.1600-0889.2010.00466.x
Responsible Party
Creator(s):Author: Annika Schomburg
Author: Victor Venema
Author: Ralf Lindau
Author: Felix Ament
Author: Clemens Simmer
Publisher:The International Meteorological Institute in Stockholm
TR32 Topic:Atmosphere
Subject(s):CRC/TR32 Keywords: COSMO, Atmosphere, SVAT Modelling
File Details
File Name:2010_Schomburg_TellusB.pdf
Data Type:Text
Size(s):17 Pages
File Size:954 kB (0.932 MB)
Date(s):Date Submitted: 2010-06-15
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Other
Measurement Location:--Other--
Specific Informations - Publication
Article Type:Journal
Source:Tellus B
Number Of Pages:17
Page Range:242 - 258
Metadata Details
Metadata Creator:Annika Schomburg
Metadata Created:2013-12-03
Metadata Last Updated:2013-12-03
Funding Phase:1
Metadata Language:English
Metadata Version:V40
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