Sensitivity of Latent Heat Fluxes to Initial Values and Parameters of a Land-Surface Model
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| Title: | Main Title: Sensitivity of Latent Heat Fluxes to Initial Values and Parameters of a Land-Surface Model |
| Description: | Abstract: A tangent linear version of the complex soil–vegetation–atmosphere transfer model Community Land Model has been developed and its ability to reproduce relevant sensitivities of the modeled soil moisture and latent heat flux (LE) evolution to a number of different parameters on a short time scale (3 d) was analyzed. To this end, a series of idealized experiments for different soil moisture states and three different soil types was conducted. We found that the tangent linear model performs well for a large range of conditions. Situations in which the linear approximation potentially fails were connected with the occurrence of saturation and with the highly nonlinear parameterization of water availability to plants. The sensitivity of LE with respect to the model's initial soil moisture state was calculated and compared with the LE sensitivity to soil texture, leaf area index (LAI), and vegetation roughness length. These sensitivities were found to be highly variable with soil type and soil moisture. Our results confirm that soil texture and LAI are key parameters that have a dominant influence on modeled LE under specific environmental conditions. As a preparatory study to soil data assimilation developments, the results also serve to quantify model uncertainties due to limited knowledge of forcing processes and model parameters. |
| Identifier: | 10.2136/vzj2009.0190 (DOI) |
Responsible Party
| Creators: | Jörg Schwinger (Author), Stefan Kollet (Author), Charlotte M. Hoppe (Author), Hendrik Elbern (Author) |
| Publisher: | Soil Science Society of America |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Atmosphere |
| Related Subproject: | D3 |
| Subjects: | Keywords: Latent Heat Flux, SVAT Modelling, Soil Moisture |
File Details
| Filename: | 2010_Schwinger_VZJ.pdf |
| Data Type: | Text - Article |
| Size: | 18 Pages |
| File Size: | 4 MB |
| Date: | Issued: 20.10.2010 |
| 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: | Vadose Zone Journal |
| Source Website: | www.soils.org |
| Issue: | 4 |
| Volume: | 9 |
| Number of Pages: | 18 (984 - 1001) |
Metadata Details
| Metadata Creator: | Jörg Schwinger |
| Metadata Created: | 03.12.2013 |
| Metadata Last Updated: | 03.12.2013 |
| Subproject: | D3 |
| Funding Phase: | 1 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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