Joint Seminar: Hydroclimate responses over global monsoon regions to volcanic eruptions during the last millennium

Understanding the influence of volcanic eruptions on the hydroclimate over global monsoon regions is of great scientific and social importance. However, the link between the latitude of volcanic eruptions and related hydroclimate changes over global monsoon regions remains inconclusive. In this study we show divergent hydroclimate responses after different volcanic eruptions based on large sets of reconstructions, observations and model simulation. Our results show that northern hemispheric (southern hemispheric) monsoon precipitation is weakened by northern (southern) and tropical eruptions, but is enhanced by the southern (northern) eruptions. Arid regions exhibit a wetter condition after volcanic eruptions, especially for volcanoes located in the northern hemisphere and tropics. Moisture budget analysis and moist static energy (MSE) budget analysis reveal that the dynamic processes related to changes in atmospheric circulation play a dominant role in precipitation responses. We extend our analysis from mean state precipitation to extreme precipitation and find that the response of the extreme precipitation is consistent with that of the mean precipitation, but more sensitive on a regional scale.




15:15–16:45 h


Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg


Chao Li

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