Lintao Li and Han Dolman in the Journal of Hydrometeorology

2 February 2016

PhD student Lintao Li from China and Han Dolman, Professor in Hydrology at Earth and Climate Cluster of the Earth and Life Sciences Faculty of Vrije Universiteit Amsterdam, recently published in the Journal of Hydrometeorology. The paper describes the use of Lagrangian models to analyse the moisture sources of the East Asian Monsoon.

In a new paper just published in the Journal of Hydrometeorology, PhD student from China Lintao Li and Han Dolman analyses the moisture sources of the East Asian Monsoon (EAM) using so called Lagrangian tracking models. These models allowed them to tag the moisture originating from diverse sources such as the Siberian mainland and the tropical seas. In winter, while the main inflow is from the Siberian mainland, the transported moisture is too dry to generate rainfall, so the small inflow from the tropical seas provide most of moisture for rainfall.

In Summer, the main contribution was through the southwest monsoon, providing more than 40% of the moisture to the EAM and making the southwest monsoon the most humid and abundant moisture source of the EAM. For the first time the importance of the different sources has thus been quantified. In an accompanying paper, soon to be published in the Journal of Meteorological Research, Lintao Li and Han Dolman apply the technique to analyse the sources of the 21-7-2012 extreme rainfall over Beijing, China.

Publication details

Lintao Li, Albertus J. Dolman, and Zongxue Xu: Atmospheric Moisture Sources, Paths, and the Quantitative Importance to the Eastern Asian Monsoon Region, Journal of Hydrometeorology, February 2016, Vol. 17, No. 2 : pp. 637-649, doi: 10.1175/JHM-D-15-0082.1

4-year cluster mean trajectories - Han Dolman

Four year cluster mean trajectories in summer. Light gray lines: 8000 particles randomly chosen from particles released in summer of 2009, color lines: cluster mean trajectories of all the particles released in summer during the 4-year period. The color indicates the mean specific humidity of air parcel in each path; the line width indicates the number of particles belonging to each cluster and the black arrow indicates the direction of the mean local moisture flow.

Published by  IBED Water