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Australian Summer Monsoon Index (AUSMI)
The Australian summer monsoon (AUSM) index is defined as an area-averaged seasonally (DJFM) dynamical normalized seasonality (DNS) at 925 hPa within the Australian monsoon domain (20°S-5°S, 100°-160°E) (Li and Zeng, 2002, 2003, 2005).
The Australian Summer Monsoon Index (AUSMI)
The normalized time series of AUSMI for the period of 1948-2022.
The summer here is DJFM. The thick solid lines indicate 9-year Gaussian-type filtered values.
Correlation between precipitation and the AUSMI (shading) and regression of 850-mb winds against the monsoon index (vectors) for December, January, February, and March from 1979 to 2006, respectively. The shaded areas and vectors indicate significant at the 95% confidence level.
Related References
- Li, J. P., J. Feng, and Y. Li, 2011: A possible cause of decreasing summer rainfall in northeast Australia. Int. J. Climatol., 31, doi: 10.1002/joc.2328. PDF
- Li, J. P., Z. W. Wu, Z. H. Jiang, and J. H. He, 2010: Can global warming strengthen the East Asian summer monsoon?. J. Climate, 23, 6696-6705. PDF
- Feng, J., J. P. Li, and Y. Li, 2010: A monsoon-like Southwest Australian circulation and its relation with rainfall in Southwest Western Australia. J. Climate, 23: 1334-1353. PDF
- Wang, B., Z. W. Wu, J. P. Li, J. Liu, C. P. Chang, Y. H. Ding, and G. X. Wu, 2008: How to measure the strength of the East Asian summer monsoon. J. Climate, 21, 4449-4462. PDF
- Li, J. P., and Q. C. Zeng, 2005: A new monsoon index, its interannual variability and relation with monsoon precipitation. Climatic and Environmental Research, 10(3): 351-365. PDF
- Li, J. P., and Q. C. Zeng, 2003: A new monsoon index and the geographical distribution of the global monsoons. Adv. Atmos. Sci., 20, 299-302. PDF
- Li, J. P., and Q. C. Zeng, 2002: A unified monsoon index. Geophysical Research Letters, 29(8), 1274, doi:10.1029/2001GL013874. PDF
- Zeng, Q. C., and J. P. Li, 2002: On the Interaction between Northern and Southern Hemispheric Atmospheres and the Essence of Tropical Monsoon. Chinese Journal of Atmospheric Sciences, 26, 207-226. PDF
- Li, J. P., and Q. C. Zeng, 2000: Significance of the normalized seasonality of wind field and its rationality for characterizing the monsoon. Science in China (D), 43(6): 647-653. PDF
| Filename | Size | Description |
| 4 kilobytes | Australian Summer Monsoon Index (AUSMI) | |
| You can download this file from here (right-click then select "Save Target As" or "Save Link As"). | ||
| File format |
| for year = 1948 to present format (1x, i4, 10f7.3) year, Jan, Feb, Mar, Dec and summer (DJFM) raw values, Jan, Feb, Mar, Dec and summer (DJFM) normalized values |
| Note: Missing values represented by 99.999. |