Regarding the accuracy of simulating TWSA and calibration

[weixiaoxun]

Hello, Professor! I followed your YouTube video to simulate TWSA (Total Water Storage Anomaly) in the northern region of China using CWatM. I used the model's outputs for the years 1985-2019 and compared them with the data from the three GRACE centers for the years 2002-2016. I found that after May 31, 2010, the simulated data from the model kept increasing, while the data from the three GRACE centers showed a decreasing trend (highlighted in the red box in the graph). Then, I simulated the years 2010-2016 again using the model and obtained the same results, but there were some differences compared to the first simulation (highlighted in the yellow box in the graph). Later, I noticed that you mentioned calibration in the end, but it seemed to be related to discharge. Can this calibration be applied to address this issue? I would appreciate it if you could help clarify. Thank you!

[weixiaoxun]

Hello, Professor. This time I performed a warm-up for the model and resolved the issue of the rapid initial decline. However, the simulated results after 2012 still do not synchronize with the data from the three GRACE centers. Could you please help me understand this? Thank you.