Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks.

[ 6 ] observe an increasing trend in C emissions from these lakes, with annual emissions rising from 2.10 ± 1.00 Tg C yr −1 in 1980 to 3.80 ± 1.10 Tg C yr −1 in 2010.

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However, a decreasing trend was observed in annual total CO 2 emissions from 2000 to 2020 compared to corresponding values from 1970 to 2000 ( Fig. 6 ).

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However, after 2000, the annual solar radiation on the QZP showed a trend of fluctuation and decline, which would weaken convection in the water bodies, thus reducing CO 2 emission.

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