Preprints
https://doi.org/10.5194/acp-2021-892
https://doi.org/10.5194/acp-2021-892

  17 Nov 2021

17 Nov 2021

Review status: this preprint is currently under review for the journal ACP.

In-situ observation of warm atmospheric layer and the contribution of suspended dusts over the Tarim Basin

Chenglong Zhou1,2,3, Yuzhi Liu1,2, Qingzhe Zhu1, Qing He3, Tianliang Zhao4, Fan Yang1,2,3, Wen Huo3, Xinghua Yang3, and Mamtimn Ali3 Chenglong Zhou et al.
  • 1Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China
  • 2Collaborative Innovation Center for Western Ecological Safety, Lanzhou University, Lanzhou, 730000, China
  • 3Institute of Desert Meteorology, China Meteorological Administration/Taklimakan National Station of Observation and Research for Desert Meteorology in Xinjiang/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration, Urumqi 830002, China
  • 4Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China

Abstract. Basing on the radiosonde observations in the spring and summer during 2016–2017, an anomalous warm atmospheric layer is verified and the contribution of suspended dusts over the Tarim Basin (TB) is quantified. The result indicates a warm atmospheric layer between 300 hPa and 500 hPa with an average intensity of 2.53 K and 1.39 K in the spring and summer, respectively. Over the TB, where the world’s second largest moving desert, the Taklimakan Desert (TD) is distributed, large amounts of dust particles are emitted from the TD and suspended over the TB. Using the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) data, we found the dusts can be lifted to the upper atmospheric layer between 2.5 and 5.5 km above mean sea level over the TB. Consequently, the suspended dusts can exert a maximum heating effect of approximately +0.45 K and +0.25 K in spring and summer, respectively. The contribution of dust heating to the anomalous warm atmospheric layer over the TB is 13.77 % and 10.25 % in spring and summer, respectively. In view of the topographical feature, the TB is adjacent to the Tibetan Plateau (TP) which acts as an elevated heat source in spring and summer. The warm atmospheric layer over the TB seems a northward extension of Tibet heat source, the concept of which is proposed in this study. Such a northward extension of the elevated heating by the Tibetan Plateau could induce some profound impacts on the regional climate, especially on the western section of the “Silk Road Economic Belt”, and therefore demands more attention.

Chenglong Zhou et al.

Status: open (until 29 Dec 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-892', Anonymous Referee #2, 21 Nov 2021 reply

Chenglong Zhou et al.

Chenglong Zhou et al.

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Short summary
Basing on the radiosonde observations, an anomalous warm layer is measured at altitudes between 500 hPa and 300 hPa over the Tarim Basin (TB) with an average intensity of 2.53 K and 1.39 K in the spring and summer, respectively. Suspended dust is one of the contributors to this warm layer. Topographically, the TB is adjacent to the Tibetan Plateau (TP), we propose the concept of the Tibetan heat source’s northward extension. This is a unique atmospheric phenomenon in China.
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