Systematic errors in ground heat flux estimation and their correction
Incoming radiation forcing at the land surface is partitioned among the components of the surface energy balance in varying proportions depending on the time scale of the forcing. Based on a land-atmosphere analytic continuum model, a numerical land surface model, and field observations we show that...
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| Format: | Article |
| Language: | en_US |
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American Geophysical Union (Wiley platform)
2014
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| Online Access: | http://hdl.handle.net/1721.1/89230 https://orcid.org/0000-0002-8362-4761 |
| _version_ | 1826198435929260032 |
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| author | Gentine, Pierre Heusinkveld, B. Entekhabi, Dara |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Gentine, Pierre Heusinkveld, B. Entekhabi, Dara |
| author_sort | Gentine, Pierre |
| collection | MIT |
| description | Incoming radiation forcing at the land surface is partitioned among the components of the surface energy balance in varying proportions depending on the time scale of the forcing. Based on a land-atmosphere analytic continuum model, a numerical land surface model, and field observations we show that high-frequency fluctuations in incoming radiation (with period less than 6 h, for example, due to intermittent clouds) are preferentially partitioned toward ground heat flux. These higher frequencies are concentrated in the 0–1 cm surface soil layer. Subsequently, measurements even at a few centimeters deep in the soil profile miss part of the surface soil heat flux signal. The attenuation of the high-frequency soil heat flux spectrum throughout the soil profile leads to systematic errors in both measurements and modeling, which require a very fine sampling near the soil surface (0–1 cm). Calorimetric measurement techniques introduce a systematic error in the form of an artificial band-pass filter if the temperature probes are not placed at appropriate depths. In addition, the temporal calculation of the change in the heat storage term of the calorimetric method can further distort the reconstruction of the surface soil heat flux signal. A correction methodology is introduced which provides practical application as well as insights into the estimation of surface soil heat flux and the closure of surface energy balance based on field measurements. |
| first_indexed | 2024-09-23T11:04:55Z |
| format | Article |
| id | mit-1721.1/89230 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:04:55Z |
| publishDate | 2014 |
| publisher | American Geophysical Union (Wiley platform) |
| record_format | dspace |
| spelling | mit-1721.1/892302022-10-01T01:02:19Z Systematic errors in ground heat flux estimation and their correction Gentine, Pierre Heusinkveld, B. Entekhabi, Dara Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Parsons Laboratory for Environmental Science and Engineering (Massachusetts Institute of Technology) Entekhabi, Dara Incoming radiation forcing at the land surface is partitioned among the components of the surface energy balance in varying proportions depending on the time scale of the forcing. Based on a land-atmosphere analytic continuum model, a numerical land surface model, and field observations we show that high-frequency fluctuations in incoming radiation (with period less than 6 h, for example, due to intermittent clouds) are preferentially partitioned toward ground heat flux. These higher frequencies are concentrated in the 0–1 cm surface soil layer. Subsequently, measurements even at a few centimeters deep in the soil profile miss part of the surface soil heat flux signal. The attenuation of the high-frequency soil heat flux spectrum throughout the soil profile leads to systematic errors in both measurements and modeling, which require a very fine sampling near the soil surface (0–1 cm). Calorimetric measurement techniques introduce a systematic error in the form of an artificial band-pass filter if the temperature probes are not placed at appropriate depths. In addition, the temporal calculation of the change in the heat storage term of the calorimetric method can further distort the reconstruction of the surface soil heat flux signal. A correction methodology is introduced which provides practical application as well as insights into the estimation of surface soil heat flux and the closure of surface energy balance based on field measurements. 2014-09-09T15:44:14Z 2014-09-09T15:44:14Z 2012-09 2012-08 Article http://purl.org/eprint/type/JournalArticle 00431397 http://hdl.handle.net/1721.1/89230 Gentine, P., D. Entekhabi, and B. Heusinkveld. “Systematic Errors in Ground Heat Flux Estimation and Their Correction.” Water Resources Research 48, no. 9 (September 2012). © 2012 American Geophysical Union https://orcid.org/0000-0002-8362-4761 en_US http://dx.doi.org/10.1029/2010wr010203 Water Resources Research Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Geophysical Union (Wiley platform) Other univ. web domain |
| spellingShingle | Gentine, Pierre Heusinkveld, B. Entekhabi, Dara Systematic errors in ground heat flux estimation and their correction |
| title | Systematic errors in ground heat flux estimation and their correction |
| title_full | Systematic errors in ground heat flux estimation and their correction |
| title_fullStr | Systematic errors in ground heat flux estimation and their correction |
| title_full_unstemmed | Systematic errors in ground heat flux estimation and their correction |
| title_short | Systematic errors in ground heat flux estimation and their correction |
| title_sort | systematic errors in ground heat flux estimation and their correction |
| url | http://hdl.handle.net/1721.1/89230 https://orcid.org/0000-0002-8362-4761 |
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