climatologic "India-Burma Trough Index" defined by vort_positive. Unit: s-1. Jan~Dec
8.6074e-05
7.92472e-05
4.14073e-05
2.31201e-05
6.66822e-05
0.000171099
0.000236762
0.000283615
0.000157074
5.44003e-05
5.86192e-05
7.97457e-05