Climate modelling study on mountain uplift and Asian monsoon evolution

Motoi, Tatsuo; Arakawa, Osamu

doi:10.1144/sp342.17

Cited by 17 publications

(13 citation statements)

References 29 publications

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“…Prior work has shown that a higher TP causes IAM precipitation to move poleward and increase in intensity Prell and Kutzbach, 1992;Kitoh, 2004;Kitoh et al, 2010). In our results with a higher TP, peak precipitation moves poleward in both seasons due to shifts in diabatic heating (Fig.…”

Section: Focus On the Tibetan Plateau And The Indo-asian Monsoonsupporting

confidence: 58%

Eocene monsoons

Huber¹,

Goldner²

2012

Journal of Asian Earth Sciences

166

117

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a b s t r a c tA prominent example of climate-tectonic coupling is the Asian monsoon and the uplift of the Tibetan Plateau. Here we review some of what is known about the history of the monsoon, within a global context and present results from fully coupled Eocene simulations in which Tibetan Plateau height is varied. Peak elevations were doubled from 2000 m to 4000 m whereas mean elevations increased from 750 to 1500 m. The fully coupled Eocene simulations show that introducing a higher Tibetan Plateau into Asian topography intensifies rainfall over southwest Asia, but induces drying over and behind the Plateau. This atmospheric response is controlled by increases in heating over the Plateau region which drives increases in moisture convergence inducing shifts in lower level atmospheric moisture flux. With Eocene boundary conditions aspects of the canonical response from prior work remain the same: cooling over the uplifted region, a large stationary wave response emanating from the plateau and extending into North America, and a large increase in precipitation in summer in the regions with strongest relief, with a rain shadow behind it. But some important local responses are different from similar studies with modern boundary conditions, such as a warming behind the uplifted mountains, and southward advection of warm, moist air from Paratethys onto the Plateau. These results demonstrate that simulations with fully interactive ocean-atmosphere coupled models with a realistic history of paleogeographic boundary conditions will increase the realism of the resulting climatic simulations and increase the body of available proxy evidence for comparison.More generally we find that a global monsoon distribution of precipitation exists in the Eocene regardless of Tibetan Plateau height. Changing Plateau height has minor global impacts, which include a slight drying of midlatitude and cooling of the North Pacific. The results are robust to changes in climate model resolution and atmospheric pCO 2 changes. In general the impacts of the increase in height of the Plateau are minor and it is unlikely that major patterns in early Cenozoic climate change can be explained by the physical climatic impacts of its uplift.

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Section: Focus On the Tibetan Plateau And The Indo-asian Monsoonsupporting

confidence: 58%

Eocene monsoons

Huber¹,

Goldner²

2012

Journal of Asian Earth Sciences

166

117

View full text Add to dashboard Cite

show abstract

“…More importantly, this Asia monsoon collapse associated with TP removal was shown to more aggravated in the context of coupled models as compared to that in atmosphere alone models due to enhanced ocean-atmosphere feedback (Kitoh, 2004). Meanwhile, the freshwater discharge around the western North Pacific marginal seas from the Asian rivers was previously found to be substantially reduced in response to monsoon collapse (Kitoh et al, 2010).…”

Section: Atmospheric Responsesmentioning

confidence: 94%

Intensified Atlantic vs. weakened Pacific meridional overturning circulations in response to Tibetan Plateau uplift

Jiang

Zhang

et al. 2017

Preprint

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“…In our study, the changes are stronger 568 between the 100%, 75% and 50% experiments than between the 25% and 0% 569 simulations. Kitoh et al (2010) have reported that their 60% experiment represented a 570 threshold for accelerated climate change. A novel aspect of our modeling design 571 pertains to the high spatial resolution and, at the same time, the relatively long 572 simulation periods for the time slices, which allow for a more sophisticated statistical 573 In terms of precipitation, the pattern is dominated by drier conditions in most of the 591 model domain.…”

Section: Paxian Et Al 2016) 561mentioning

confidence: 99%

Comparison of Cenozoic surface uplift and glacial-interglacial cycles on Himalaya-Tibet paleo-climate: Insights from a regional climate model

Paeth

Steger

et al. 2017

Preprint

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45Assessing paleo-climatic changes across the Tibetan Plateau and the underlying 46 driving mechanisms provides insights for the natural variability in the Earth's climate 47 system in response to tectonic processes and global climate change. In this study, we 48 use a high-resolution regional climate model to investigate various episodes of distinct 49 climate states over the Tibetan Plateau region during the Cenozoic rise of the Plateau 50and Quaternary glacial/interglacial cycles. The main objective is to compare climate 51 changes during the Miocene-Pliocene uplift period with climate anomalies during the 52 last glacial maximum and the mid-Holocene optimum, based on a consistent modeling 53 framework. 54Reduced plateau elevation leads to regionally differentiated patterns of higher 55 temperature and lower precipitation amount on the plateau itself, whereas surrounding 56 regions are subject to colder conditions. In particular, Central Asia receives much more 57 precipitation prior to the uplift, mainly due to a shift of the stationary wave train over 58Eurasia. Cluster analysis indicates that the continental-desert type climate, which is 59 widespread over Central Asia today, appears with the Tibetan Plateau reaching 50 % 60 of its present-day elevation. 61The mid-Holocene is characterized by slightly colder temperatures, and the last glacial 62 maximum by considerably colder conditions over most of central and southern Asia. 63Precipitation anomalies during these episodes are less pronounced and spatially 64 heterogeneous over the Tibetan Plateau. The simulated changes are in good 65 agreement with available paleo-climatic reconstructions from proxy data. The present-66 day climate classification is only slightly sensitive to the changed boundary conditions 67 in the Quaternary Quaternary. It is shown that in some regions of the Tibetan Plateau 68Clim. Past Discuss., https://doi

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Climate modelling study on mountain uplift and Asian monsoon evolution

Cited by 17 publications

References 29 publications

Eocene monsoons

Eocene monsoons

Intensified Atlantic vs. weakened Pacific meridional overturning circulations in response to Tibetan Plateau uplift

Comparison of Cenozoic surface uplift and glacial-interglacial cycles on Himalaya-Tibet paleo-climate: Insights from a regional climate model

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