Chlorophyll-a concentrations in 82 large alpine lakes on the Tibetan Plateau during 2003-2017: temporal-spatial variations and influencing factors

Pi, Xuehui1,2; Feng, Lian1; Li, Weifeng2; Liu, Junguo1; Kuang, Xingxing1; Shi, Kun3; Qi, Wei1; Chen, Deliang4; Tang, Jing5

2021

10.1080/17538947.2021.1872722

International Journal of Digital Earth   影响因子和分区

1753-8947

1753-8955

As essential parts of the unique ecosystem of Tibetan Plateau (TP), the sizes and associated physical properties of alpine lakes have long been investigated. However, little is known about one of the most critical biogeochemical properties, i.e. the Chlorophyll-a (Chl-a) concentrations. Here, for the first time, we presented a comprehensive investigation of the temporal-spatial variations in Chl-a in 82 lakes (>50 km(2)) across the entire TP region, based on MODIS observations in the period of 2003-2017. The results showed that the 82 lakes exhibited an average long-term mean Chl-a of 3.3 +/- 4.3 mg m(-3), with high Chl-a lakes concentrated in the eastern and southern inner TP basin and northeastern parts of the TP. An interannual trend analysis revealed that lakes exhibiting (significantly) decreasing Chl-a trends and (significantly) increasing Chl-a trends were comparable in numbers but differed in distribution patterns. A correlation analysis indicated that at least 70% of the interannual variability in Chl-a values of lakes was significantly correlated with one of the four environmental factors (wind speed, ice cover duration, lake water surface temperature and surface runoff) and lake size. In addition, glacier meltwater tended to reduce lake Chl-a while salinity levels showed minor influences.

Chlorophyll-a inland water Tibetan Plateau remote sensing alpine lake

SCI ; EI

英语

第一

Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20060402] ; Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0202] ; National Natural Science Foundation of China[91747204,4197130] ; Shenzhen Science and Technology Innovation Committee[JCYJ20190809155205559]

Physical Geography ; Remote Sensing

Geography, Physical ; Remote Sensing

WOS:000607422700001

TAYLOR & FRANCIS LTD

20213210736960

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China
2.Univ Hong Kong, Dept Urban Planning & Design, Pok Fu Lam, Hong Kong, Peoples R China
3.Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing, Peoples R China
4.Univ Gothenburg, Dept Earth Sci, Regional Climate Grp, Gothenburg, Sweden
5.Univ Copenhagen, Dept Biol, Copenhagen, Denmark

Pi, Xuehui,Feng, Lian,Li, Weifeng,et al. Chlorophyll-a concentrations in 82 large alpine lakes on the Tibetan Plateau during 2003-2017: temporal-spatial variations and influencing factors[J]. International Journal of Digital Earth,2021,14:714-735.

Pi, Xuehui.,Feng, Lian.,Li, Weifeng.,Liu, Junguo.,Kuang, Xingxing.,...&Tang, Jing.(2021).Chlorophyll-a concentrations in 82 large alpine lakes on the Tibetan Plateau during 2003-2017: temporal-spatial variations and influencing factors.International Journal of Digital Earth,14,714-735.

Pi, Xuehui,et al."Chlorophyll-a concentrations in 82 large alpine lakes on the Tibetan Plateau during 2003-2017: temporal-spatial variations and influencing factors".International Journal of Digital Earth 14(2021):714-735.