The link between Tibetan Plateau monsoon and Indian summer precipitation: a linear diagnostic perspective

Ge, Fei; Sielmann, Frank; Zhu, Xiuhua; Fraedrich, Klaus; Zhi, Xiefei; Peng, Ting; Wang, Lei

doi:10.1007/s00382-017-3585-1

Cited by 53 publications

(26 citation statements)

References 47 publications

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“…The Mann–Kendall statistical analysis (Smadi and Zghoul, ) and the composite analysis (Xun et al ., ; Ge et al ., ) are also applied to study the late spring soil moisture variation over the TP and its possible mechanism affecting the plateau summer monsoon.…”

Section: Methodsmentioning

confidence: 99%

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Late spring soil moisture variation over the Tibetan Plateau and its influences on the plateau summer monsoon

Zhou

Wen

Liu

et al. 2018

Intl Journal of Climatology

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Based on the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-Interim reanalysis data from 1979 to 2016, an index for Tibetan Plateau (TP) soil moisture (I TPSM ), which could represent inter-annual variation in spring soil moisture, is defined after removing the linear trend in soil moisture. The late spring soil moisture variation over the TP and its influences on the plateau summer monsoon are analysed. The results show that the TP soil moisture variation is non-uniform, and spring soil moisture over the northeastern TP shows an increasing trend, while the western TP (especially the peripheral area) renders a significantly decreasing trend. When the I TPSM shows positive (negative) anomalies (i.e., spring soil moisture over the northeastern TP is higher (lower), soil moisture over the western TP is lower (higher) than normal), the plateau summer monsoon may be stronger (weaker). Anomalous variations in spring TP soil moisture can eventually affect the plateau summer monsoon by changing atmospheric circulation, diabatic heating, and water vapour transportation. It is found that when the I TPSM exhibits positive anomalies, diabatic heating over the centre and eastern TP is remarkably enhanced, and warm and humid moisture from the Bay of Bengal and Arabian Sea and cold air from high latitudes merge over the central and eastern TP; coupled with lower-level convergence and upper-level divergence, all these contribute to an increase in plateau summer monsoonal precipitation. When the I TPSM shows negative anomalies, diabatic heating over the centre and eastern TP is weakened, the anomalous cyclone to the south of the TP hinders warm and humid air flows transportation to the TP, and the anomalous anticyclone to the southeast of Lake Baikal weakens cold air to the south; coupled with weakened convergence and upwards motion, these factors all lead to a decrease in plateau summer monsoonal precipitation.

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Section: Methodsmentioning

confidence: 99%

“…The Tibetan Plateau (TP), with a mean altitude that exceeds 4,000 m and reaches one third the height of the tropopause, is the highest and most extensive geographic features in the world (Ge et al ., ). The dynamic and thermal forcing caused by the TP has a great influence on regional and global climate (Ye and Gao, ; Wang et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Late spring soil moisture variation over the Tibetan Plateau and its influences on the plateau summer monsoon

Zhou

Wen

Liu

et al. 2018

Intl Journal of Climatology

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“…The increase in precipitable water over the Indian Ocean region is more as compared to www.nature.com/scientificreports www.nature.com/scientificreports/ the sub-tropics, including Tibetan Plateau. Coupled with the increase in air temperature over Tibetan plateau, it creates favorable conditions for ISM 31,34,35 , which may result in increased extreme precipitation over Indian landmass, as observed in Fig. 2b-d.…”

Section: Possible Causes Of Change In Characteristics Of Precipitatiomentioning

confidence: 97%

Southward shift of precipitation extremes over south Asia: Evidences from CORDEX data

Suman

Maity

2020

Sci Rep

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or the change in the spatio-temporal distribution of precipitation extremes between the period 1930-1970 and 1971-2017. These periods are selected based on the climate regime shift in the 1970s. A jump in the mean and 95 th percentile of the daily annual precipitation is also noticed over India in the decade of 1970-1980 (please refer to the detailed discussion in the supplementary document). During the study of future precipitation, the areas affected by ISM are included in the study domain. Future precipitation extremes are analyzed using 7 Coordinated Regional Climate Downscaling Experiment (CORDEX) simulations to investigate -whether the behavior of precipitation extremes (their magnitude and spatial pattern) will be similar and, if yes, then what the possible causes are. The details of CORDEX models used in this study are provided in Table S1 (supplementary document). Three characteristics of annual daily precipitation, namely mean precipitation, and threshold (cut-off) and mean precipitation for days with extreme precipitation, are analyzed for their spatio-temporal changes. Two different thresholds (i.e., 95 th and 99 th percentile; henceforth represented as P95 and P99 respectively) are selected to identify the days with extreme precipitation. The mean of extreme precipitation magnitude equal to or greater than P95 and P99, are denoted by M95 and M99, respectively. Further, the reasons for the changes in the aforementioned precipitation characteristics are investigated by analyzing the air temperature, moisture flux, and moisture convergence from the observed data and future CORDEX simulations. Scientific RepoRtS |(2020) 10:6452 | https://doi.

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“…It is often considered to be the largest area of ice outside the polar regions (Xu et al 2008). Water vapor over the TP largely originates from the Bay of Bengal and the Indian Ocean (Feng and Zhou 2012;Ge et al 2017) via river valleys in the southern TP, such as the Brahmaputra and Irrawaddy. The amount of water vapor originating from the western boundary of the region along the southern edge of the TP is ~ 32% of that originating from the southern boundary (Feng and Zhou 2012).…”

Section: Introductionmentioning

confidence: 99%

On the role of horizontal resolution over the Tibetan Plateau in the REMO regional climate model

Koldunov

Remedio

et al. 2018

Clim Dyn

Self Cite

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A number of studies have shown that added value is obtained by increasing the horizontal resolution of a regional climate model to capture additional fine-scale weather processes. However, the mechanisms leading to this added value are different over areas with complicated orographic features, such as the Tibetan Plateau (TP). To determine the role that horizontal resolution plays over the TP, a detailed comparison was made between the results from the REMO regional climate model at resolutions of 25 and 50 km for the period 1980-2007. The model was driven at the lateral boundaries by the European Centre for Medium-Range Weather Forecasts Interim Reanalysis data. The experiments differ only in representation of topography, all other land parameters (e.g., vegetation characteristics, soil texture) are the same. The results show that the high-resolution topography affects the regional air circulation near the ground surface around the edge of the TP, which leads to a redistribution of the transport of atmospheric water vapor, especially over the Brahmaputra and Irrawaddy valleys-the main water vapor paths for the southern TP-increasing the amount of atmospheric water vapor transported onto the TP by about 5%. This, in turn, significantly decreases the temperature at 2 m by > 1.5 °C in winter in the high-resolution simulation of the southern TP. The impact of topography on the 2 m temperature over the TP is therefore by influencing the transport of atmospheric water vapor in the main water vapor paths.

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The link between Tibetan Plateau monsoon and Indian summer precipitation: a linear diagnostic perspective

Cited by 53 publications

References 47 publications

Late spring soil moisture variation over the Tibetan Plateau and its influences on the plateau summer monsoon

Late spring soil moisture variation over the Tibetan Plateau and its influences on the plateau summer monsoon

Southward shift of precipitation extremes over south Asia: Evidences from CORDEX data

On the role of horizontal resolution over the Tibetan Plateau in the REMO regional climate model

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