TY  - JOUR
A1  - Tang, Hui
A1  - Micheels, Arne
A1  - Eronen, Jussi T.
A1  - Ahrens, Bodo
A1  - Fortelius, Mikael
T1  - Asynchronous responses of East Asian and Indian summer monsoons to mountain uplift shown by regional climate modelling experiments
T2  - Climate dynamics
N2  - has been demonstrated in climate models that both the Indian and East Asian summer monsoons (ISM and EASM) are strengthened by the uplift of the entire Asian orography or Tibetan Plateau (TP) (i.e. bulk mountain uplift). Such an effect is widely perceived as the major mechanism contributing to the evolution of Asian summer monsoons in the Neogene. However, geological evidence suggests more diachronous growth of the Asian orography (i.e. regional mountain uplift) than bulk mountain uplift. This demands a re-evaluation of the relation between mountain uplift and the Asian monsoon in the geological periods. In this study, sensitivity experiments considering the diachronous growth of different parts of the Asian orography are performed using the regional climate model COSMO-CLM to investigate their effects on the Asian summer monsoons. The results show that, different from the bulk mountain uplift, the regional mountain uplift can lead to an asynchronous development of the ISM and EASM. While the ISM is primarily intensified by the thermal insulation (mechanical blocking) effect of the southern TP (Zagros Mountains), the EASM is mainly enhanced by the surface sensible heating of the central, northern and eastern TP. Such elevated surface heating can induce a low-level cyclonic anomaly around the TP that reduces the ISM by suppressing the lower tropospheric monsoon vorticity, but promotes the EASM by strengthening the warm advection from the south of the TP that sustains the monsoon convection. Our findings provide new insights to the evolution of the Asian summer monsoons and their interaction with the tectonic changes in the Neogene.
KW  - Mountain uplift
KW  - East Asian summer monsoon (EASM)
KW  - Indian summer monsoon (ISM)
KW  - Regional climate model
KW  - Asynchronous evolution
KW  - Thermal effect
Y1  - 2012
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/29476
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-294764
SN  - 1802-6419
N1  - Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
VL  - 2012
IS  - 40
SP  - 1531
EP  - 1549
PB  - Springer
CY  - Berlin ; Heidelberg
ER  -