Does Chagan Lake in China have a PCO2 change?

This study used Landsat satellite images to analyze the spatiotemporal characteristics and factors influencing the CO2 changes in Chagan Lake in China. We conducted six water sampling campaigns at Chagan Lake in 2020–2021 and determined the partial pressure of carbon dioxide (pCO2) from 110 water samples.

Does Chagan Lake have water?

Chagan Lake has progressed from “no water” to “water” to “clear water”, and the lake area has been stable at 300 km 2 since 2012. The concentration of nitrogen and phosphorus in the water has decreased significantly, with mean nitrogen and phosphorus concentrations of 0.949 mg/L and 0.088 mg/L in 2021, respectively ( Figure 11 ).

Is Chagan Lake a eutrophication Lake?

Chagan Lake is the seventh-largest freshwater lake in China and the largest natural lake in Jilin Province, with a surface area of 420 km 2 and a mean water depth of 2.5 m [ 31, 32 ]. The main input source of Chagan Lake is the Songhua River, and the lake is one of the eutrophication lakes in China [ 33 ].

What is the main input source of Chagan Lake?

The main input source of Chagan Lake is the Songhua River, and the lake is one of the eutrophication lakes in China [ 33 ]. Chagan Lake is endowed with rich natural resources and is a well-known fishery and reed industry base.

Does Chagan Lake have a high CO2 level?

Moreover, the measured water temperature, chlorophyll, TSM, and turbidity of Chagan Lake revealed high values in summer and low values in autumn, and their Pearson correlation coefficients with the p CO 2 values were 0.61, 0.82, 0.85, and 0.84, respectively ( Figure 10 ).

Where is Lake Chagan located?

Published by Elsevier Ltd. Not far from Semey (formerly Semipalatinsk), one of the main cities in the northeast of Kazakhstan, the vast steppe is interrupted by a big lake that resembles a natural pond, called Lake Chagan.