Study on impact of the South Asian summer monsoon on the down‐valley wind on the northern slope of Mt. Everest

Zhou, Libo; Han, Zhiwei; Ma, Shuai

doi:10.1029/2008gl034151

Cited by 22 publications

(24 citation statements)

References 19 publications

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“…The SASM is the most important climate system in Asia (Webster et al, 1998;Goswami and Xavier, 2003;Ding, 2007;Zhou et al, 2008Zhou et al, , 2012. It is known that the monsoon index is a critical parameter for quantitatively describing and studying monsoon evolution.…”

Section: Evolution Of the Sasmmentioning

confidence: 99%

Vertical structures of atmospheric properties in Southeast Tibet during the South Asian summer monsoon in 2013

Zhou

Zhu

et al. 2016

J Meteorol Res

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In June 2013, a field experiment was conducted in Southeast Tibet in which the air temperature, moisture, and wind were measured by using a GPS sounding system. In the present study, based on these observations and ERA-Interim reanalysis data, the vertical structures of these atmospheric properties and the possible influence of the South Asian summer monsoon (SASM) were investigated. On average, the temperature had a lapse rate of 6.8℃ km −1 below the tropopause of 18.0 km. A strong moisture inversion occurred at the near-surface, with a strength of 1.7 g kg −1 (100 m) −1 for specific humidity. During the observation period, the SASM experienced a south phase and a north phase in the middle and by the end of June, respectively. The monsoon's evolution led to large changes in convection and circulation over Southeast Tibet, which further affected the local thermal, moisture, and circulation conditions. The strong convection resulted in an elevated tropopause height over Southeast Tibet during the north phase of the SASM, and the large-scale warm and wet air masses delivered by the monsoon caused high local temperature and moisture conditions.

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Section: Evolution Of the Sasmmentioning

confidence: 99%

Vertical structures of atmospheric properties in Southeast Tibet during the South Asian summer monsoon in 2013

Zhou

Zhu

et al. 2016

J Meteorol Res

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“…The South Asian summer monsoon is the basic atmospheric circulation system controlling the weather and climate over the South Asia in summer [ Webster et al , ; Goswami et al , ; Ding , ; Zhou et al , , ]. The evolution of South Asian summer monsoon can be described by Wang and Fan's SASM index (SASMI), as a standardized difference between the averaged zonal wind speed in two regions, 5–15°N, 40–80°E and 20–30°N, 60–90°E.…”

Section: South Asian Summer Monsoon and Synoptic Situationmentioning

confidence: 99%

The observed impacts of South Asian summer monsoon on the local atmosphere and the near‐surface turbulent heat exchange over the Southeast Tibet

Zhou

Han

et al. 2015

JGR Atmospheres

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The Southeast Tibet is an important region of the Tibetan Plateau bearing the interaction between the Tibetan and the neighbor atmospheric systems. The South Asian summer monsoon (SASM) as a basic climate system in Asia could impact the local atmosphere and the near‐surface heat exchange process in the Southeast Tibet. An observational campaign, Observation on the Surface‐to‐air Exchange Processes in Southeast Tibet (OSEP2013), was carried out in this region during SASM in 2013. The atmospheric parameters and turbulent heat fluxes were observed and averaged over three different land surfaces of the inhomogeneous landscape during the observation campaign. Results show clear SASM impacts on the local atmosphere and near‐surface heat exchange in the Southeast Tibet. The South Asian summer monsoon was onset on 1 June 2013 and experienced a south phase and north phase during OSEP2013. The convection and humidity were increased in the Southeast Tibet by SASM, especially during the north phase. The observation domain received low radiation energy due to the convective clouds brought by SASM, and the soil and air temperatures were lowered as consequence. In addition, the air humidity was increased over this region by the wet air transportation of SASM circulation. The sensible and latent heat transfers were decreased by the low land‐air temperature difference and high air humidity during SASM. The latent heat transfer dominated the total heat transfer in the Southeast Tibet due to the low sensible heat transfer in the SASM situation, and the domination was increased as the sensible heat transfer was further decreased during the SASM north phase.

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“…In the upper Rongbuk Valley, a narrow and steep northern Himalayan valley upstream of QOMS, a strong downvalley wind with a vertical depth of over 1000 m was observed during the day (Gao, 1985;Song et al, 2007;Zou et al, 2008;Zhou et al, 2008). Numerical simulations have attributed the formation of this downvalley wind in the Rongbuk Valley (near QOMS) to the joint influence of high-altitude glaciers and thermally driven winds, and glacier wind has been found to play an important role Ma et al, 2013).…”

Section: Introductionmentioning

confidence: 97%

Observation of Strong Winds on the Northern Slopes of Mount Everest in Monsoon Season

Sun

et al. 2017

Arctic, Antarctic, and Alpine Research

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Study on impact of the South Asian summer monsoon on the down‐valley wind on the northern slope of Mt. Everest

Cited by 22 publications

References 19 publications

Vertical structures of atmospheric properties in Southeast Tibet during the South Asian summer monsoon in 2013

Vertical structures of atmospheric properties in Southeast Tibet during the South Asian summer monsoon in 2013

The observed impacts of South Asian summer monsoon on the local atmosphere and the near‐surface turbulent heat exchange over the Southeast Tibet

Observation of Strong Winds on the Northern Slopes of Mount Everest in Monsoon Season

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