Liu, J., B. Wang, Q. Ding, X. Kuang, W. Soon, and E. Zorita, 2009: Centennial variations of global monsoon precipitation in the last millennium: Results from ECHO ‑ G model, Journal of Climate 22: 2356 — 2370. (climatechangeawards.org)
Centennial Variations of the Global Monsoon Precipitation in the Last Millennium: Results from ECHO - G Model (sciencemag.org)
In summary, an intensification of the Asian summer monsoon and an enhancement of summer monsoon precipitation variability with increased greenhouse gases that was reported in the SAR has been corroborated by new studies. (ipcc.ch)