Diurnal and Seasonal Variations in the Net Ecosystem CO2 Exchange of a Pasture in the Three-River Source Region of the Qinghai-Tibetan Plateau.

Fig 3 shows an increasing trend in CO 2 emissions from winter (January) to summer (July − August) and a decreasing trend until autumn (September), with maximum and minimum values in July (90.36 g C m − 2 month − 1 ) and January (2.96 g C m − 2 month − 1 ), respectively ( Fig 3 ).

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