CHINA 74 CIRCULATION INDICES
| 1. Index of the area of the Northern Hemisphere subtropical high (5E-360E) |
| 2. Index of the area of the North African subtropical high (20W-60E) |
| 3. Index of the area of the subtropical high over the North African, Atlantic and North American(110W-60E) |
| 4. Index of the area of the subtropical high over Indian (65E-95E) |
| 5. Index of the area of the subtropical high over the western Pacific (110E-180E) |
| 6. Index of the area of the subtropical high over the eastern Pacific (175W-115W) |
| 7. Index of the area of the North American subtropical high (110W-60W) |
| 8. Index of the area of the subtropical high over the Atlantic (55W-25W) |
| 9. Index of the area of the subtropical high over the South China Sea (100E-120E) |
| 10. Index of the area of the North America-Atlantic subtropical high (110W-20W) |
| 11. Index of the area of the subtropical high over the Pacific (110E-115W) |
| 12. Index of the strength of the Northern Hemisphere subtropical high(5E-360) |
| 13. Index of the strength of the North African subtropical high (20W-60E) |
| 14. Index of the strength of the subtropical high over the North African, Atlantic and North American(110W-60E) |
| 15. Index of the strength of the Indian subtropical high (65E-95E) |
| 16. Index of the strength of the subtropical high over the western Pacific (110E-180) |
| 17. Index of the strength of the subtropical high over the eastern Pacific (175W-115W) |
| 18. Index of the strength of the North American subtropical high (110W-60W) |
| 19. Index of the strength of the subtropical high over the Atlantic (55W-25W) |
| 20. Index of the strength of the subtropical high over the South China Sea (100E-120E) |
| 21. Index of the strength of the North America-Atlantic subtropical high (110W-20W) |
| 22. Index of the strength of the subtropical high over the Pacific (110E-115W) |
| 23. The ridge line of the Northern Hemisphere subtropical high (5E-360) |
| 24. The ridge line of the North African subtropical high (20W-60E) |
| 25. The ridge line of the subtropical high over the North African, Atlantic and North American(110W-60E) |
| 26. The ridge line of the Indian subtropical high (65E-95E) |
| 27. The ridge line of the subtropical high over the western Pacific (110E-150E) |
| 28. The ridge line of the subtropical high over the eastern Pacific (175W-115W) |
| 29. The ridge line of the North American subtropical high (110W-60W) |
| 30. The ridge line of the Atlantic subtropical high (55W-25W) |
| 31. The ridge line of the subtropical high over the South China Sea (100E-120E) |
| 32. The ridge line of the North America-Atlantic subtropical high (110W-20W) |
| 33. The ridge line of the subtropical high over the Pacific (110E-115W) |
| 34. Index of the northern extend of the Northern Hemisphere subtropical high (5E-360) |
| 35. Index of the northern extend of the North African subtropical high (20W-60E) |
| 36. Index of the northern extend of the subtropical high over the North African, Atlantic and North American(110W-60E) |
| 37. Index of the northern extend of the Indian subtropical high (65E-95E) |
| 38. Index of the northern extend of the subtropical high over the western Pacific (110E-150E) |
| 39. Index of the northern extend of the subtropical high over the eastern Pacific (175W-115W) |
| 40. Index of the northern extend of the North American subtropical high (110W-60W) |
| 41. Index of the northern extend of the subtropical high over the Atlantic(55W-25W) |
| 42. Index of the northern extend of the subtropical high over the South China Sea (100E-120E) |
| 43. Index of the northern extend of the North America-Atlantic subtropical high (110W-20W) |
| 44. Index of the northern extend of the subtropical high over Pacific (110E-115W) |
| 45. Index of the western extend of subtropical high over the Western Pacific |
| 46. Index of the area of the polar vortex in the Asia(60E-150E) |
| 47. Index of the area of the polar vortex in the Pacific sector(150E-120W) |
| 48. Index of the area of the polar vortex in the north American(120W-30W) |
| 49. Index of the area of the polar vortex in the Atlantic and Europe sector(30W-60E) |
| 50. Index of the area of the northern hemisphere polar vortex (0-360) |
| 51. Index of the strength of the polar vortex in the Asia(60E-150E) |
| 52. Index of the strength of the polar vortex in the Pacific sector(150E-120W) |
| 53. Index of the strength of the polar vortex in the north American(120W-30W) |
| 54. Index of the strength of the polar vortex in the Atlantic and Europe sector(30W-60E) |
| 55. Index of the strength of the polar vortex in northern hemisphere (0-360) |
| 56. Index of the station of the polar vortex center in northern hemisphere (JW) |
| 57. Index of the strength of the polar vortex center in northern hemisphere (JQ) |
| 58. Atlantic and Europe pattern W |
| 59. Atlantic and Europe pattern C |
| 60. Atlantic and Europe pattern E |
| 61. Zonal index over Eurasian continent (IZ, 0-150E) |
| 62. Meridional index over Eurasian continent (IM, 0-150E) |
| 63. Zonal index over Asia (IZ, 60E-150E) |
| 64. Meridional index over Asia (IM, 60E-150E) |
| 65. Station of the East Asian trough (CW) |
| 66. Index of the strength of the East Asian trough (CQ) |
| 67. Tibetan Plateau (25N-35N,80E-100E) |
| 68. Tibetan Plateau (30N-40N,75E-105E) |
| 69. Index of the strength of the India-Burma trough (15N-20N,80E-100E) |
| 70. Index of the frequency of cold-air intrusion into China |
| 71. Formatting typhoon |
| 72. Landing typhoon |
| 73. Index of the macula |
| 74. SOI |
