Effect of wind on monsoon index. (IMAGE) Tokyo Metropolitan University Caption Arrows show 200hPa winds (about 12km above sea level) in May that have a strong impact on the monsoon index in June. Color maps show average 200hPa wind speeds. Credit Tokyo Metropolitan University Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.