Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates
Remotely sensed land surface temperature- (LST-) dependent evapotranspiration (ET) models and vegetation index- (VI-) LST methods may not be suitable for ET estimation in energy-limited cold areas. In this study, the relationship of ET to LST was simulated using the process-based Simultaneous Heat a...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2016/1835487 |
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| author | Zhigang Sun Qinxue Wang Ochirbat Batkhishig Zhu Ouyang |
| author_facet | Zhigang Sun Qinxue Wang Ochirbat Batkhishig Zhu Ouyang |
| author_sort | Zhigang Sun |
| collection | DOAJ |
| description | Remotely sensed land surface temperature- (LST-) dependent evapotranspiration (ET) models and vegetation index- (VI-) LST methods may not be suitable for ET estimation in energy-limited cold areas. In this study, the relationship of ET to LST was simulated using the process-based Simultaneous Heat and Water (SHAW) model for energy- and water-limited conditions in Mongolia, to understand the differences in ET processes under these two limiting conditions in dry and cold climates. Simulation results from the SHAW model along with ground observational data showed that ET and LST have a positive relationship when air temperature (Ta) is less than or equal to the temperature (Ttra) above which plants transpire and have a negative relationship when Ta is greater than Ttra under the energy-limited condition. However, ET and LST maintain a negative relationship with changes in Ta under the water-limited condition. The differences in the relationship between ET and LST under the energy-limited and water-limited conditions could be attributed to plant transpiration and energy storage in moist/watered soil and plants. This study suggests that different strategies should be used to estimate ET under the energy-limited condition in dry and cold climates. |
| format | Article |
| id | doaj-art-da6fa8c52500406883c11be17dc366b9 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-da6fa8c52500406883c11be17dc366b92025-02-03T01:33:08ZengWileyAdvances in Meteorology1687-93091687-93172016-01-01201610.1155/2016/18354871835487Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold ClimatesZhigang Sun0Qinxue Wang1Ochirbat Batkhishig2Zhu Ouyang3Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaCenter for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba 305-8506, JapanInstitute of Geography, Mongolian Academy of Sciences, 14192 Ulaanbaatar, MongoliaKey Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaRemotely sensed land surface temperature- (LST-) dependent evapotranspiration (ET) models and vegetation index- (VI-) LST methods may not be suitable for ET estimation in energy-limited cold areas. In this study, the relationship of ET to LST was simulated using the process-based Simultaneous Heat and Water (SHAW) model for energy- and water-limited conditions in Mongolia, to understand the differences in ET processes under these two limiting conditions in dry and cold climates. Simulation results from the SHAW model along with ground observational data showed that ET and LST have a positive relationship when air temperature (Ta) is less than or equal to the temperature (Ttra) above which plants transpire and have a negative relationship when Ta is greater than Ttra under the energy-limited condition. However, ET and LST maintain a negative relationship with changes in Ta under the water-limited condition. The differences in the relationship between ET and LST under the energy-limited and water-limited conditions could be attributed to plant transpiration and energy storage in moist/watered soil and plants. This study suggests that different strategies should be used to estimate ET under the energy-limited condition in dry and cold climates.http://dx.doi.org/10.1155/2016/1835487 |
| spellingShingle | Zhigang Sun Qinxue Wang Ochirbat Batkhishig Zhu Ouyang Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates Advances in Meteorology |
| title | Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates |
| title_full | Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates |
| title_fullStr | Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates |
| title_full_unstemmed | Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates |
| title_short | Relationship between Evapotranspiration and Land Surface Temperature under Energy- and Water-Limited Conditions in Dry and Cold Climates |
| title_sort | relationship between evapotranspiration and land surface temperature under energy and water limited conditions in dry and cold climates |
| url | http://dx.doi.org/10.1155/2016/1835487 |
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