Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau
In the Tibetan Plateau (TP), the changes of lake ice phenology not only reflect regional climate change, but also impose substantial ecohydrological impacts on the local environment. Due to the limitation of ground observation, remote sensing has been used as an alternative tool to investigate recen...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-09-01
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| Series: | Remote Sensing |
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| Online Access: | http://www.mdpi.com/2072-4292/10/10/1534 |
| _version_ | 1819289057421688832 |
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| author | Linan Guo Yanhong Wu Hongxing Zheng Bing Zhang Junsheng Li Fangfang Zhang Qian Shen |
| author_facet | Linan Guo Yanhong Wu Hongxing Zheng Bing Zhang Junsheng Li Fangfang Zhang Qian Shen |
| author_sort | Linan Guo |
| collection | DOAJ |
| description | In the Tibetan Plateau (TP), the changes of lake ice phenology not only reflect regional climate change, but also impose substantial ecohydrological impacts on the local environment. Due to the limitation of ground observation, remote sensing has been used as an alternative tool to investigate recent changes of lake ice phenology. However, uncertainties exist in the remotely sensed lake ice phenology owing to both the data and methods used. In this paper, three different remotely sensed datasets are used to investigate the lake ice phenology variation in the past decade across the Tibetan Plateau, with the consideration of the underlying uncertainties. The remotely sensed data used include reflectance data, snow product, and land surface temperature (LST) data of moderate resolution imaging spectroradiometer (MODIS). The uncertainties of the three methods based on the corresponding data are assessed using the triple collocation approach. Comparatively, it is found that the method based on reflectance data outperforms the other two methods. The three methods are more consistent in determining the thawing dates rather than the freezing dates of lake ice. It is consistently shown by the three methods that the ice-covering duration in the northern part of the TP lasts longer than that in the south. Though there is no general trend of lake ice phenology across the TP for the period of 2000–2015, the warmer climate and stronger wind have led to the earlier break-up of lake ice. |
| first_indexed | 2024-12-24T03:00:48Z |
| format | Article |
| id | doaj.art-4d12e3f7092841f380a386738bad14c3 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-24T03:00:48Z |
| publishDate | 2018-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-4d12e3f7092841f380a386738bad14c32022-12-21T17:18:13ZengMDPI AGRemote Sensing2072-42922018-09-011010153410.3390/rs10101534rs10101534Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan PlateauLinan Guo0Yanhong Wu1Hongxing Zheng2Bing Zhang3Junsheng Li4Fangfang Zhang5Qian Shen6Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Science, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Science, Beijing 100094, ChinaCSIRO Land and Water, Canberra, ACT 2601, AustraliaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Science, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Science, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Science, Beijing 100094, ChinaKey Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Science, Beijing 100094, ChinaIn the Tibetan Plateau (TP), the changes of lake ice phenology not only reflect regional climate change, but also impose substantial ecohydrological impacts on the local environment. Due to the limitation of ground observation, remote sensing has been used as an alternative tool to investigate recent changes of lake ice phenology. However, uncertainties exist in the remotely sensed lake ice phenology owing to both the data and methods used. In this paper, three different remotely sensed datasets are used to investigate the lake ice phenology variation in the past decade across the Tibetan Plateau, with the consideration of the underlying uncertainties. The remotely sensed data used include reflectance data, snow product, and land surface temperature (LST) data of moderate resolution imaging spectroradiometer (MODIS). The uncertainties of the three methods based on the corresponding data are assessed using the triple collocation approach. Comparatively, it is found that the method based on reflectance data outperforms the other two methods. The three methods are more consistent in determining the thawing dates rather than the freezing dates of lake ice. It is consistently shown by the three methods that the ice-covering duration in the northern part of the TP lasts longer than that in the south. Though there is no general trend of lake ice phenology across the TP for the period of 2000–2015, the warmer climate and stronger wind have led to the earlier break-up of lake ice.http://www.mdpi.com/2072-4292/10/10/1534lake ice phenologyTibetan Plateauinland waterclimate change |
| spellingShingle | Linan Guo Yanhong Wu Hongxing Zheng Bing Zhang Junsheng Li Fangfang Zhang Qian Shen Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau Remote Sensing lake ice phenology Tibetan Plateau inland water climate change |
| title | Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau |
| title_full | Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau |
| title_fullStr | Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau |
| title_full_unstemmed | Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau |
| title_short | Uncertainty and Variation of Remotely Sensed Lake Ice Phenology across the Tibetan Plateau |
| title_sort | uncertainty and variation of remotely sensed lake ice phenology across the tibetan plateau |
| topic | lake ice phenology Tibetan Plateau inland water climate change |
| url | http://www.mdpi.com/2072-4292/10/10/1534 |
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