Land–atmosphere–ocean coupling associated with the Tibetan Plateau and its climate impacts

Liu, Yimin; Lu, Mengmeng; Yang, Haijun; Duan, Anmin; He, Bian; Yang, Song; Wu, Guoxiong

doi:10.1093/nsr/nwaa011

Cited by 132 publications

(112 citation statements)

References 128 publications

(126 reference statements)

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“…The dynamical and thermodynamical status over the elevated TP is a prominent source of atmospheric forcing in the subtropics, the so-called TP forcing. The TP forcing can modulate the atmospheric circulation over the whole globe (Duan and Wu 2005;Liu et al 2007Liu et al , 2020Wu et al 1997Wu et al , 2007Tamura and Koike 2010;Wang et al 2018a, b). Besides the studies of the TP influence on the mean circulation and climate, the influence of TP thermal forcing on interannual variation of the Asian summer monsoon has also been well addressed (Zhao and Chen 2001;Wang et al 2008;Lau and Kim 2018).…”

Section: Introductionmentioning

confidence: 99%

Impact of North Atlantic SST and Tibetan Plateau forcing on seasonal transition of springtime South Asian monsoon circulation

Liu

Yang

et al. 2020

Clim Dyn

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The South Asian circulation and precipitation in spring shows a clear seasonal transition and interannual variation. We investigate how the North Atlantic sea surface temperature (SST) and Tibetan Plateau (TP) forcing affect this seasonal transition over South Asia on interannual timescale. Our results suggest that North Atlantic SST can affect the seasonal transition of South Asian monsoon via TP forcing in spring. The positive tripole pattern of North Atlantic SST anomaly during winter–spring can trigger a steady downstream Rossby wave train with cyclonic circulation over the southwestern TP. This forms a spring dipole mode of surface sensible heating and 10 m winds over the plateau, with a westerly (easterly) flow and positive (negative) surface sensible heating over its southern (northern) regions. A distinct land–air coupling configuration in May is then generated on the southwestern TP via such a positive TP dipole mode, which consists of anomalous positive precipitation, negative surface sensible heating and a baroclinic circulation structure with cyclonic circulation in the mid- to upper troposphere and a shallow anticyclonic circulation in the lower layer. The anticyclonic circulation is opposite to the summertime monsoon circulation. It weakens the cross-equatorial flow and water vapor transport to the South Arabian Sea and Bay of Bengal, resulting in in-situ precipitation reduction. Consequently, the seasonal transition in circulation over South Asia from winter to summer is delayed.

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Section: Introductionmentioning

confidence: 99%

Impact of North Atlantic SST and Tibetan Plateau forcing on seasonal transition of springtime South Asian monsoon circulation

Liu

Yang

et al. 2020

Clim Dyn

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“…Meanwhile, the values are only about 50% in spring and winter. The results are probably due to a heating system formed over the TP in monsoon, elevating the tropopause, generates a monsoonal meridional circulation over South Asia (Liu et al ., 2020c), which creates favourable conditions of the aerosol transport to the TP in monsoon. To investigate the reasons for the aerosol transport system over the TP, we also give the annual mean wind field at 850, 700, 500 and 200 hPa by season in Figure 8, indicating that the convergence field is prevalent in summer.…”

Section: Resultsmentioning

confidence: 99%

Modelling study on the source contribution to aerosol over the Tibetan Plateau

Zhao

Dai

Wang

et al. 2021

Intl Journal of Climatology

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Understanding the source of atmospheric aerosol is an essential step in determining the aerosol radiative effect over the Tibetan Plateau (TP). This study aims to clarify the contributions of anthropogenic and natural emission to the aerosols (carbonaceous and sulphate) characteristics inside the TP. An aerosol model named Spectral Radiation Transport Model for Aerosol Species (SPRINTARS) recently coupled to the climate model named Chinese Academy of Sciences Flexible Global Ocean Atmosphere Land System (CAS‐FGOALS‐f3‐L) is used to simulate meteorological conditions and aerosols from 1985 to 2013, given emissions from the sixth phase of the Coupled Models Intercomparison Project (CMIP6). Comparisons between the simulations and ERA5 reanalysis data present that the model can capture the key spatial and temporal features of meteorological elements (2‐m temperature, relative humidity, and wind field at 500 hPa) over the Asia. Subsequently, we conduct six sensitivity studies to quantify the contributions of sources to aerosol surface concentration, burden and aerosol optical depth (AOD) over the TP. Our results illustrate that the outside and local anthropogenic sources contribute about 75.2% (78.9% in summer and 66.6% in winter) and 13.5% (7.4% in summer and 24.0% in winter) to the annual mean aerosols surface concentrations over the TP. The outside anthropogenic sources contribute to AODs in TP up to 87.3% (93.9% in autumn and 80.6% in winter). The ascending air over the TP is conducive to the transportation of the outsource pollutions to the TP. The outside natural sources (refer to biomass burning sources) contribute about 10% to aerosols over TP, and the inside natural sources play minor roles. The black carbon, organic carbon and sulphate (BOCS) induce average radiative forcing of −0.7 W m−2 at the near surface over the TP.

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“…Thermodynamical processes are closely related to dynamical processes, and an analysis of the thermodynamical processes can reveal further details about the cloud and rainfall characteristics. The thermodynamical processes over the TP play an important role in the East Asian summer monsoon and have a strong impact on the weather in China (e.g., Chen et al, 2015; Liu et al, 2020; Yanai & Wu, 2006). Hence, the thermodynamical impacts of the rawinsonde data on the reanalysis are assessed by conducting the heat and moisture budget calculations.…”

Section: Obj's Impacts On the Dynamical And Thermodynamical Structuresmentioning

confidence: 99%

“…In addition, it is difficult to verify the accuracy of the observational data due to the small number of observations (Siefridt et al, 1999). Meanwhile, an inadequate understanding of the meteorological conditions over the TP causes large uncertainties in the data acquired from simulations (Liu et al, 2020; Yanai & Wu, 2006). The accuracy of the reanalysis data needs to be improved (Chen et al, 2015; You et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Impacts of TIPEX‐III Rawinsondes on the Dynamics and Thermodynamics Over the Eastern Tibetan Plateau in the Boreal Summer

Chen

et al. 2020

JGR Atmospheres

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Observations and simulations have shown that the Tibetan Plateau (TP) plays an important role in the climate and weather of East Asia. Uncertainties in reanalysis data sets have been documented by comparing them with independent rawinsonde data, but the impacts of incorporating this data into a reanalysis data set on the dynamical and thermodynamical features over the TP have not been assessed. Observations from the recent Third Tibetan Plateau Atmospheric Scientific Experiment (TIPEX‐III) can be used to evaluate the Eastern TP ERA‐Interim reanalysis data set (ERA). In this study, the Barnes objective analysis scheme is used to incorporate the rawinsonde data into the ERA to acquire the gridded data (OBJ) for examining heat and moisture budgets. It is shown that the OBJ budget‐estimated rainfall intensity is better correlated with the observations than the ERA budget‐estimated rainfall intensity. The ERA overestimates weak rainfall but underestimates heavy rainfall. The incorporation of special rawinsonde into the OBJ impacts the dynamical and thermodynamical characteristics both spatially and temporally. The downward motion and cooling are enhanced over the rainless regions/periods, while the upward motion and heating are enhanced over the rainy regions/periods. The rawinsonde effect is stronger with the increasing rainfall intensity. The differences of spatial distributions and temporal variations in heating between the OBJ and ERA are primarily determined by the vertical advection terms in heat and moisture budgets. The OBJ‐derived large‐scale forcing is essential for cloud‐resolving model simulations of TP cloud systems. The above conclusions can also be applied to the ERA5.

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Land–atmosphere–ocean coupling associated with the Tibetan Plateau and its climate impacts

Cited by 132 publications

References 128 publications

Impact of North Atlantic SST and Tibetan Plateau forcing on seasonal transition of springtime South Asian monsoon circulation

Impact of North Atlantic SST and Tibetan Plateau forcing on seasonal transition of springtime South Asian monsoon circulation

Modelling study on the source contribution to aerosol over the Tibetan Plateau

Impacts of TIPEX‐III Rawinsondes on the Dynamics and Thermodynamics Over the Eastern Tibetan Plateau in the Boreal Summer

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