Assessing the impacts of the spring sensible heat flux over the Tibetan Plateau on Asian summer monsoon rainfall using observational and reanalysis data

Zhan, Chuanlang; Shi, Qinqing; Liang, Shunlin

doi:10.1002/joc.6336

Cited by 7 publications

(5 citation statements)

References 78 publications

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“…4 ). The albedo-induced enhancement of SAH could shift the lower-layer WPSH northwestward 30 through the propagation of a Rossby wave train 31 , 32 . Specifically, when Rossby waves triggered by the intensification of SAH propagate eastward along the westerly jet, a quasi-barotropic and stationary upper-tropospheric ridge over the coast of China is formed, which further pulls both the SAH and the WPSH, and thus leads to the northwestward (eastward) movement of WPSH (SAH) 33 – 35 .…”

Section: Resultsmentioning

confidence: 99%

Regional and tele-connected impacts of the Tibetan Plateau surface darkening

et al. 2023

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Despite knowledge of the presence of the Tibetan Plateau (TP) in reorganizing large-scale atmospheric circulation, it remains unclear how surface albedo darkening over TP will impact local glaciers and remote Asian monsoon systems. Here, we use a coupled land-atmosphere global climate model and a glacier model to address these questions. Under a high-emission scenario, TP surface albedo darkening will increase local temperature by 0.24 K by the end of this century. This warming will strengthen the elevated heat pump of TP, increasing South Asian monsoon precipitation while exacerbating the current “South Flood-North Drought” pattern over East Asia. The albedo darkening-induced climate change also leads to an accompanying TP glacier volume loss of 6.9%, which further increases to 25.2% at the equilibrium, with a notable loss in western TP. Our findings emphasize the importance of land-surface change responses in projecting future water resource availability, with important implications for water management policies.

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Section: Resultsmentioning

confidence: 99%

Regional and tele-connected impacts of the Tibetan Plateau surface darkening

et al. 2023

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“…In addition, comparing the monthly variation of the standard deviation of the SH, it can be seen that the standard deviation of the SH is relatively larger in May (Qian et al, 2004). Therefore, in some studies, the SH in May was used to characterize the intensity of the spring heat source over the TP (Zhao and Chen, 2001b;Duan et al, 2017;Zhan et al, 2020;Duan et al, 2022).…”

Section: Interannual Change and Trends Of Spring Sh Over The Tpmentioning

confidence: 99%

Impacts of Tibetan Plateau sensible heat and El Niño–Southern Oscillation on precipitation over South China under the background of the PDO

Sun

Xing

Zhou

et al. 2023

Front. Environ. Sci.

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This study aims to investigate the impacts of the spring sensible heat (SH) over the Tibetan Plateau (TP) and the El Niño–Southern Oscillation (ENSO) in the preceding wintertime on midsummer (July–August) precipitation over South China under the different Pacific decadal oscillation (PDO) phases. More specifically, eight classifications are adopted at the demarcation point around 1996 when the spring SH over the TP and the midsummer precipitation in South China occurred as well as the PDO phase transition, including positive and negative SHs and ENSOs under a positive PDO phase (1979–1996) and a negative PDO phase (1997–2019), respectively, based on the Niño-3 index and the spring SH calculated from 48 stations over the central and eastern parts of the TP. The results show that both the spring SH and the ENSO in preceding wintertime have a significant impact on the midsummer precipitation over South China; that is, when the two factors are in their respective positive (negative) phase, the midsummer precipitation in South China is generally less (more). Importantly, the phase change of background field PDO can significantly enhance the effect of the SH and the ENSO on summer precipitation over South China. Moreover, compared with the preceding wintertime ENSO, the spring SH over the TP contributes more to the midsummer precipitation in South China based on analyses of their independent and synergistic effects. The main mechanism responsible for the anomalous midsummer precipitation over South China are the combined effects of the South Asian high (SAH) and the western Pacific subtropical high (WPSH), which are controlled by the spring SH anomaly over the TP and the ENSO, respectively. Deep understanding of the dominant factors of the midsummer precipitation over South China will help understand the local climate change and reduce the losses caused by drought and flood disasters.

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“…4). The albedo-induced enhancement of SAH could shift the lower-layer WPSH northwestward 30 through the propagation of a Rossby wave train 31,32 . Specifically, when Rossby waves triggered by the intensification of SAH propagate eastward along the westerly jet, a quasi-barotropic and stationary upper-tropospheric ridge over the coast of China is formed, which further pulls both the SAH and the WPSH, and thus leads to the northwestward (eastward) movement of WPSH (SAH) [33][34][35] .…”

Section: Impact Of the Tp Surface Darkening On The Asmmentioning

confidence: 99%

Regional and tele-connected impacts of the Tibetan Plateau surface darkening

Tang

Vlug

Piao

et al. 2023

Preprint

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<p>Despite knowledge of the presence of the Tibetan Plateau (TP) in reorganizing large-scale atmospheric circulation, it remains unclear how surface albedo darkening over TP will impact local glaciers and remote Asian monsoon systems. Here, we use a coupled land-atmosphere global climate model and a glacier model to address these questions. Under a high-emission scenario, TP surface albedo darkening will increase local temperature by 0.24 K by the end of this century. This warming will strengthen the elevated heat pump of TP, increasing South Asian monsoon precipitation while exacerbating the current &#8220;South Flood-North Drought&#8221; pattern over East Asia. The albedo darkening-induced climate change also leads to an accompanying TP glacier volume loss of 6.9%, which further increases to 25.2% at the equilibrium, with a notable loss in western TP. Our findings emphasize the importance of land-surface change responses in projecting future water resource availability, with important implications for water management policies.</p>

show abstract

Assessing the impacts of the spring sensible heat flux over the Tibetan Plateau on Asian summer monsoon rainfall using observational and reanalysis data

Cited by 7 publications

References 78 publications

Regional and tele-connected impacts of the Tibetan Plateau surface darkening

Regional and tele-connected impacts of the Tibetan Plateau surface darkening

Impacts of Tibetan Plateau sensible heat and El Niño–Southern Oscillation on precipitation over South China under the background of the PDO

Regional and tele-connected impacts of the Tibetan Plateau surface darkening

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