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Numerical study of the interaction between oasis and urban areas within an arid mountains-desert system in Xinjiang, China

Peng Cai (UGent) , Rafiq Hamdi (UGent) , Huili He (UGent) , Geping Luo, Jin Wang, Miao Zhang, Chaofan Li, Piet Termonia (UGent) and Philippe De Maeyer (UGent)
(2020) ATMOSPHERE. 11(1).
Author
Organization
Abstract
The rapid oasis expansion and urbanization that occurred in Xinjiang province (China) in the last decades have greatly modified the land surface energy balance and influenced the local circulation under the arid mountains-plain background system. In this study, we first evaluated the ALARO regional climate model coupled to the land surface scheme SURFEX at 4 km resolution using 53 national climatological stations and 5 automatic weather stations. We found that the model correctly simulates daily and hourly variation of 2 m temperature and relative humidity. A 4-day clear sky period has been chosen to study both local atmospheric circulations and their mutual interaction. Observations and simulations both show that a low-level divergence over oasis appears between 19:00 and 21:00 Beijing Time when the background mountain-plain wind system is weak. The model simulates a synergistic interaction between the oasis-desert breeze and urban-rural breeze from 16:00 until 22:00 with a maximum effect at 20:00 when the downdraft over oasis (updraft over urban) areas increases by 0.8 (0.4) Pa/s. The results show that the oasis expansion decreases the nocturnal urban heat island in the city of Urumqi by 0.8 degrees C, while the impact of urban expansion on the oasis cold island is negligible.
Keywords
oasis-desert breeze circulation, urban-rural breeze circulation, urban heat island, town energy balance, LATERAL BOUNDARY-CONDITIONS, LAND-SURFACE, NORTHERN SLOPE, CLIMATE-CHANGE, MODEL, PARAMETERIZATION, PRECIPITATION, RESOLUTION, SCALE, SIMULATIONS

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Citation

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MLA
Cai, Peng, et al. “Numerical Study of the Interaction between Oasis and Urban Areas within an Arid Mountains-Desert System in Xinjiang, China.” ATMOSPHERE, vol. 11, no. 1, 2020, doi:10.3390/atmos11010085.
APA
Cai, P., Hamdi, R., He, H., Luo, G., Wang, J., Zhang, M., … De Maeyer, P. (2020). Numerical study of the interaction between oasis and urban areas within an arid mountains-desert system in Xinjiang, China. ATMOSPHERE, 11(1). https://doi.org/10.3390/atmos11010085
Chicago author-date
Cai, Peng, Rafiq Hamdi, Huili He, Geping Luo, Jin Wang, Miao Zhang, Chaofan Li, Piet Termonia, and Philippe De Maeyer. 2020. “Numerical Study of the Interaction between Oasis and Urban Areas within an Arid Mountains-Desert System in Xinjiang, China.” ATMOSPHERE 11 (1). https://doi.org/10.3390/atmos11010085.
Chicago author-date (all authors)
Cai, Peng, Rafiq Hamdi, Huili He, Geping Luo, Jin Wang, Miao Zhang, Chaofan Li, Piet Termonia, and Philippe De Maeyer. 2020. “Numerical Study of the Interaction between Oasis and Urban Areas within an Arid Mountains-Desert System in Xinjiang, China.” ATMOSPHERE 11 (1). doi:10.3390/atmos11010085.
Vancouver
1.
Cai P, Hamdi R, He H, Luo G, Wang J, Zhang M, et al. Numerical study of the interaction between oasis and urban areas within an arid mountains-desert system in Xinjiang, China. ATMOSPHERE. 2020;11(1).
IEEE
[1]
P. Cai et al., “Numerical study of the interaction between oasis and urban areas within an arid mountains-desert system in Xinjiang, China,” ATMOSPHERE, vol. 11, no. 1, 2020.
@article{8642694,
  abstract     = {The rapid oasis expansion and urbanization that occurred in Xinjiang province (China) in the last decades have greatly modified the land surface energy balance and influenced the local circulation under the arid mountains-plain background system. In this study, we first evaluated the ALARO regional climate model coupled to the land surface scheme SURFEX at 4 km resolution using 53 national climatological stations and 5 automatic weather stations. We found that the model correctly simulates daily and hourly variation of 2 m temperature and relative humidity. A 4-day clear sky period has been chosen to study both local atmospheric circulations and their mutual interaction. Observations and simulations both show that a low-level divergence over oasis appears between 19:00 and 21:00 Beijing Time when the background mountain-plain wind system is weak. The model simulates a synergistic interaction between the oasis-desert breeze and urban-rural breeze from 16:00 until 22:00 with a maximum effect at 20:00 when the downdraft over oasis (updraft over urban) areas increases by 0.8 (0.4) Pa/s. The results show that the oasis expansion decreases the nocturnal urban heat island in the city of Urumqi by 0.8 degrees C, while the impact of urban expansion on the oasis cold island is negligible.},
  articleno    = {85},
  author       = {Cai, Peng and Hamdi, Rafiq and He, Huili and Luo, Geping and Wang, Jin and Zhang, Miao and Li, Chaofan and Termonia, Piet and De Maeyer, Philippe},
  issn         = {2073-4433},
  journal      = {ATMOSPHERE},
  keywords     = {oasis-desert breeze circulation,urban-rural breeze circulation,urban heat island,town energy balance,LATERAL BOUNDARY-CONDITIONS,LAND-SURFACE,NORTHERN SLOPE,CLIMATE-CHANGE,MODEL,PARAMETERIZATION,PRECIPITATION,RESOLUTION,SCALE,SIMULATIONS},
  language     = {eng},
  number       = {1},
  pages        = {20},
  title        = {Numerical study of the interaction between oasis and urban areas within an arid mountains-desert system in Xinjiang, China},
  url          = {http://dx.doi.org/10.3390/atmos11010085},
  volume       = {11},
  year         = {2020},
}

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