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- Title
Shift in the Temporal Trend of Boundary Layer Height in China Using Long‐Term (1979–2016) Radiosonde Data.
- Authors
Guo, Jianping; Li, Yuan; Cohen, Jason Blake; Li, Jian; Chen, Dandan; Xu, Hui; Liu, Lin; Yin, Jinfang; Hu, Kaixi; Zhai, Panmao
- Abstract
The knowledge regarding how the boundary layer height (BLH) changes over time is still poor. Here we analyze the spatial and temporal changes in radiosonde‐derived measurements of BLH over China from 1979 to 2016. A qualitatively robust and abrupt change of BLH occurred in 2004. Over the former period (from 1979 to 2003) a spatially uniform increase was found in the BLH, while over the latter period BLH decreased in a spatially nonuniform way. Second, the meteorological influence on the rising BLH was determined to have a negative association with soil moisture, lower tropospheric stability and relative humidity, and a positive association with the near‐surface temperature. Yet, there was a different influence of meteorology on the BLH over the latter period, where a negative association was revealed with Tsfc and relative humidity. These findings shed new light on the long‐term changes in air pollution across China. Key Points: Long‐term (1979‐2016) trend in the boundary layer height (BLH) over China was examined using newly released radiosonde dataRobust trend analyses revealed a significant temporal disparity in the trend of BLH, with a robust reversal occurring in 2004The meteorological influences on the rising and declining BLH were determined to be quite different
- Subjects
BOUNDARY layer (Aerodynamics); RADIOSONDES; ROBUST statistics; HUMIDITY; SURFACE temperature
- Publication
Geophysical Research Letters, 2019, Vol 46, Issue 11, p6080
- ISSN
0094-8276
- Publication type
Article
- DOI
10.1029/2019GL082666