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Article: Water clarity changes in 64 large alpine lakes on the Tibetan Plateau and the potential responses to lake expansion

TitleWater clarity changes in 64 large alpine lakes on the Tibetan Plateau and the potential responses to lake expansion
Authors
KeywordsSecchi disk depth
Inland water
Tibetan Plateau
MODIS
Alpine lake
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/09242716
Citation
ISPRS Journal of Photogrammetry and Remote Sensing, 2020, v. 170, p. 192-204 How to Cite?
AbstractLakes are essential components of the water cycle and ecosystems. Therefore, the ecology and water security of lakes is of great concern. However, on the Tibetan Plateau (TP), which is known as the Asian water tower, knowledge of lake water quality is in its infancy. In this study, we developed a Moderate Resolution Imaging Spectroradiometer (MODIS)-based Secchi disk depth (Zsd) retrieval model and used the proposed model to study the temporal and spatial dynamics of water clarity in 64 lakes (>50 km2) located on the TP during the 2003–2018 period. The results show that the 64 lakes have an average long-term mean Zsd of 4.4 ± 3.0 m, where lakes in the northern TP generally exhibited lower Zsd levels than those located in the southern and northeastern parts of the TP. Among all selected lakes, the number of lakes showing (significantly) decreasing Zsd change trends was approximate to those showing (significantly) increasing change trends. Nevertheless, the two trends exhibited different spatial patterns. An analysis of the potential links between lake Zsd and environmental factors suggests that lake expansion is an essential factor affecting the increase in lake Zsd, while such an impact may be offset by the increase in phytoplankton induced by climate change in lakes showing a significant Zsd decreasing trend. In addition, land use types are partially responsible for the Zsd disparities between different lakes since lakes with high Zsd commonly occurred with high vegetation cover in their surrounding areas, while glacial melting and hydrological networks showed minor influences. This study is expected to enhance our understanding of lacustrine environments in TP and other global alpine lakes under the scenario of climate change.
Persistent Identifierhttp://hdl.handle.net/10722/300901
ISSN
2023 Impact Factor: 10.6
2023 SCImago Journal Rankings: 3.760
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPI, X-
dc.contributor.authorFeng, L-
dc.contributor.authorLi, W-
dc.contributor.authorZhao, D-
dc.contributor.authorKuang, X-
dc.contributor.authorLi, J-
dc.date.accessioned2021-07-06T03:11:47Z-
dc.date.available2021-07-06T03:11:47Z-
dc.date.issued2020-
dc.identifier.citationISPRS Journal of Photogrammetry and Remote Sensing, 2020, v. 170, p. 192-204-
dc.identifier.issn0924-2716-
dc.identifier.urihttp://hdl.handle.net/10722/300901-
dc.description.abstractLakes are essential components of the water cycle and ecosystems. Therefore, the ecology and water security of lakes is of great concern. However, on the Tibetan Plateau (TP), which is known as the Asian water tower, knowledge of lake water quality is in its infancy. In this study, we developed a Moderate Resolution Imaging Spectroradiometer (MODIS)-based Secchi disk depth (Zsd) retrieval model and used the proposed model to study the temporal and spatial dynamics of water clarity in 64 lakes (>50 km2) located on the TP during the 2003–2018 period. The results show that the 64 lakes have an average long-term mean Zsd of 4.4 ± 3.0 m, where lakes in the northern TP generally exhibited lower Zsd levels than those located in the southern and northeastern parts of the TP. Among all selected lakes, the number of lakes showing (significantly) decreasing Zsd change trends was approximate to those showing (significantly) increasing change trends. Nevertheless, the two trends exhibited different spatial patterns. An analysis of the potential links between lake Zsd and environmental factors suggests that lake expansion is an essential factor affecting the increase in lake Zsd, while such an impact may be offset by the increase in phytoplankton induced by climate change in lakes showing a significant Zsd decreasing trend. In addition, land use types are partially responsible for the Zsd disparities between different lakes since lakes with high Zsd commonly occurred with high vegetation cover in their surrounding areas, while glacial melting and hydrological networks showed minor influences. This study is expected to enhance our understanding of lacustrine environments in TP and other global alpine lakes under the scenario of climate change.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/issn/09242716-
dc.relation.ispartofISPRS Journal of Photogrammetry and Remote Sensing-
dc.subjectSecchi disk depth-
dc.subjectInland water-
dc.subjectTibetan Plateau-
dc.subjectMODIS-
dc.subjectAlpine lake-
dc.titleWater clarity changes in 64 large alpine lakes on the Tibetan Plateau and the potential responses to lake expansion-
dc.typeArticle-
dc.identifier.emailLi, W: wfli@hku.hk-
dc.identifier.authorityLi, W=rp01507-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.isprsjprs.2020.10.014-
dc.identifier.scopuseid_2-s2.0-85094814354-
dc.identifier.hkuros323295-
dc.identifier.volume170-
dc.identifier.spage192-
dc.identifier.epage204-
dc.identifier.isiWOS:000592242600014-
dc.publisher.placeNetherlands-

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