Table 3 Multiple linear regression of total CO2 flux with FCO2 and water surface area in different months in the Lijiang River Basin

From: Nonlinear CO2 degassing dynamics in the Lijiang River Basin of the World Heritage Site

Implicit variable

Strahler order

Month

Coefficient

Intercept

Lmga

R2

   

FCO2

Water surface area

 

FCO2

Water surface area

 

Total CO2 flux

Order 1–3

June

0.831***

0.002***

−0.002

40.41%

30.99%

0.714

 

Order 4–5

June

13.121***

0.001***

−0.016

35.16%

44.11%

0.938

 

Order 1–3

December

0.237***

0.01***

−0.002

15.39%

67.51%

0.829

 

Order 4–5

December

12.825***

0.003***

−0.051

41.61%

42.83%

0.844

  1. ***P < 0.001.
  2. aThe average incremental contribution of each predictor (FCO2 and water surface area) to the total R2 of the model.