The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation
With moderate resolution imaging spectroradiometer (MODIS) land surface temperature products, the spatial distribution of lake surface water temperature (LSWT) in Poyang Lake (PL) during summer are explored. Results show that the high-LSWT areas at noon [13:30 local solar time (LST)] are mainly loca...
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IEEE
2025-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
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| Online Access: | https://ieeexplore.ieee.org/document/11061776/ |
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| author | Miaoxia Tian Haibo Zou Jing Zheng Anning Huang Qi Huang |
| author_facet | Miaoxia Tian Haibo Zou Jing Zheng Anning Huang Qi Huang |
| author_sort | Miaoxia Tian |
| collection | DOAJ |
| description | With moderate resolution imaging spectroradiometer (MODIS) land surface temperature products, the spatial distribution of lake surface water temperature (LSWT) in Poyang Lake (PL) during summer are explored. Results show that the high-LSWT areas at noon [13:30 local solar time (LST)] are mainly located in the southwest, south, and east of PL where the water depth is relatively shallow, while the low-LSWT regions are situated in the middle and north of PL where the water depth is relatively deep, and the spatial difference can reach 1.5 °C. This distribution is obviously different from the previous finding (i.e., high LSWT in middle of north of PL, and low LSWT in southwest of PL). By night (01:30 LST), the distribution is roughly consistent with that at noon, rather than opposite. This is mainly induced by the relatively high air temperature over the PL region at night, which cannot only increase the downward longwave radiation of atmosphere, but also decrease the heat transport from lake to air, favorably reducing the heat loss in PL and slowing down the cooling of PL. To reveal the effects of the spatial variations of LSWT on regional precipitation, two sets of experiments, i.e., nonupdate experiment with default LSWT and update experiment with LSWT originated from MODIS data, are conducted, and results show that UP experiment obviously improves precipitation simulation in PL region. Diagnoses indicate that the effects of LSWT on local precipitation are accomplished through adjusting the low-level upward motion and atmospheric instability. |
| format | Article |
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| institution | DOAJ |
| issn | 1939-1404 2151-1535 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
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| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj-art-eec7cda002174bf89a5d35ef1f5af9bd2025-08-20T03:12:24ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing1939-14042151-15352025-01-0118164621647210.1109/JSTARS.2025.358485211061776The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional PrecipitationMiaoxia Tian0https://orcid.org/0009-0001-1633-6807Haibo Zou1https://orcid.org/0000-0001-5760-0419Jing Zheng2Anning Huang3Qi Huang4Key Laboratory of Poyang Lake Wetland and Watershed Research of Ministry of Education & the Key Laboratory of Natural Disaster Monitoring, Early Warning and Assessment of Jiangxi Province, Jiangxi Normal University, Nanchang, ChinaKey Laboratory of Poyang Lake Wetland and Watershed Research of Ministry of Education & School of Geography and Environmental Science, Jiangxi Normal University, Nanchang, ChinaMeteorological Observatory of Jiangxi province, Nanchang, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing, ChinaKey Laboratory of Poyang Lake Wetland and Watershed Research of Ministry of Education, Jiangxi Normal University, Nanchang, ChinaWith moderate resolution imaging spectroradiometer (MODIS) land surface temperature products, the spatial distribution of lake surface water temperature (LSWT) in Poyang Lake (PL) during summer are explored. Results show that the high-LSWT areas at noon [13:30 local solar time (LST)] are mainly located in the southwest, south, and east of PL where the water depth is relatively shallow, while the low-LSWT regions are situated in the middle and north of PL where the water depth is relatively deep, and the spatial difference can reach 1.5 °C. This distribution is obviously different from the previous finding (i.e., high LSWT in middle of north of PL, and low LSWT in southwest of PL). By night (01:30 LST), the distribution is roughly consistent with that at noon, rather than opposite. This is mainly induced by the relatively high air temperature over the PL region at night, which cannot only increase the downward longwave radiation of atmosphere, but also decrease the heat transport from lake to air, favorably reducing the heat loss in PL and slowing down the cooling of PL. To reveal the effects of the spatial variations of LSWT on regional precipitation, two sets of experiments, i.e., nonupdate experiment with default LSWT and update experiment with LSWT originated from MODIS data, are conducted, and results show that UP experiment obviously improves precipitation simulation in PL region. Diagnoses indicate that the effects of LSWT on local precipitation are accomplished through adjusting the low-level upward motion and atmospheric instability.https://ieeexplore.ieee.org/document/11061776/Atmospheric instabilitylake surface water temperature (LSWT)Poyang Lake (PL)precipitationspatial variation |
| spellingShingle | Miaoxia Tian Haibo Zou Jing Zheng Anning Huang Qi Huang The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Atmospheric instability lake surface water temperature (LSWT) Poyang Lake (PL) precipitation spatial variation |
| title | The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation |
| title_full | The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation |
| title_fullStr | The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation |
| title_full_unstemmed | The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation |
| title_short | The Spatial Variation of Lake Surface Water Temperature of Poyang Lake in Summer and Its Impact on Regional Precipitation |
| title_sort | spatial variation of lake surface water temperature of poyang lake in summer and its impact on regional precipitation |
| topic | Atmospheric instability lake surface water temperature (LSWT) Poyang Lake (PL) precipitation spatial variation |
| url | https://ieeexplore.ieee.org/document/11061776/ |
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