Table 1 Summary of the Correlated Seasonal Mann-Kendall Tests for the long-term trends in climate (1958–2015), inflow and Lake water level (1995–2015), and NDVI (2000–2015) in Qinghai Lake region. Bold indicates no trend was detected.

Jan

5.289

0.000

2.992

0.003

2.839

0.005

2.295

0.022

−1.831

0.067

Feb

6.064

0.000

4.394

0.000

2.174

0.030

2.297

0.022

−3.118

0.002

Mar

4.917

0.000

2.160

0.031

1.329

0.184

2.176

0.030

−2.722

0.006

Apr

4.878

0.000

2.489

0.013

3.563

0.000

2.150

0.032

−2.029

0.042

May

2.972

0.003

2.791

0.005

3.201

0.001

2.266

0.023

−0.445

0.656

Jun

2.288

0.022

4.790

0.000

2.235

0.025

2.174

0.030

−0.643

0.520

Jul

1.046

0.295

2.999

0.003

2.295

0.022

2.295

0.022

−1.633

0.102

Aug

2.080

0.038

2.455

0.014

1.389

0.165

2.602

0.009

−1.227

0.126

Sep

2.053

0.040

4.314

0.000

1.570

0.116

2.537

0.011

−0.940

0.347

Oct

4.403

0.000

3.488

0.000

1.813

0.070

3.051

0.002

−2.524

0.012

Nov

4.900

0.000

3.555

0.000

2.689

0.007

3.204

0.001

−4.008

0.000

Dec

3.974

0.000

2.703

0.007

3.201

0.001

3.172

0.002

−2.128

0.033

Overall

6.300

0.000

6.000

0.000

3.600

0.000

2.600

0.009

−3.400

0.001