In situ measurements and backward-trajectory analysis of high-concentration, fine-mode aerosols in the UTLS over the Tibetan Plateau
Bibliographic Data
| ID | 15544952 |
|---|---|
| Authors | Jinqiang Zhang (0000-0003-1563-827X, Chinese Academy of Sciences), Xue Wu (0000-0002-9461-3558, Chinese Academy of Sciences, corresponding author), Shang Liu (0000-0002-3403-8651, University of Science and Technology of China), Zhixuan Bai (Chinese Academy of Sciences), Xiangao Xia (0000-0002-4187-6311, Chinese Academy of Sciences), Bing Chen (0000-0002-6058-9529, Yunnan University), Xuemei Zong (0000-0002-1975-0229, Chinese Academy of Sciences), Jianchun Bian (0000-0001-8023-0751, Chinese Academy of Sciences) |
| Year | 2019 |
| Volume | 14 |
| Issue | 12 |
| Pages | 124068-124068 |
| Publication date | 2019-11-22 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/ab5a9f |
| OpenAlex | W2989665805 |
| Language | EN |
| Citations received | 2 |
| References cited | 33 |
An aerosol layer in the upper troposphere and lower stratosphere over the Asian summer monsoon (ASM) regions, namely, the Asian tropopause aerosol layer (ATAL), has been observed based on satellite remote sensing and in situ measurements; however, its source is still under debate. In August 2018, an experimental campaign over the Tibetan Plateau at Golmud (GLM, 36.48 °N, 94.93 °E) was performed, during which a balloon-borne Portable Optical Particle Counter was used to measure the aerosol particle profile. Backward-trajectory simulations were conducted with the Massive-Parallel Trajectory Calculations model to investigate the possible sources and transport pathways of the observed particles. The in situ measurements showed a robust ATAL around the tropopause, 16 km above sea level, with a maximum aerosol number density of 35 cm −3 and a maximum aerosol mass concentration of 0.15 μ g m −3 for particles with diameters between 0.14 and 3 μ m. The aerosol particles in the ATAL are mostly smaller than 0.25 μ m in diameter, accounting for 98% of all aerosol particles detected. The backward-trajectory analysis revealed that the air parcels arrived at the altitude of the ATAL through two separate pathways: (1) the uplift below the 360 K isentropic surface, where air parcels were first elevated to the upper troposphere and then joined the ASM anticyclonic circulation; and (2) the quasi-horizontal transport along the anticyclonic circulation, located approximately between the 360 and 420 K isentropic surfaces. The complex transport pathways may aggravate the challenge of analyzing the composition of the ATAL, and further observation campaigns are required to extend our knowledge
Aerosol · Air mass (solar energy) · Altitude (triangle · Anticyclone · Atmospheric sciences · Boundary layer · Climatology · East Asian Monsoon · Meteorology · Monsoon · Physics · Plateau (mathematics · Stratosphere · Tropopause · Troposphere · Atmospheric aerosols and clouds · Atmospheric chemistry and aerosols · Atmospheric Ozone and Climate · Environmental Science · Geology
| Citations per year | 0.33 |
|---|---|
| Citation span | 2020 - 2024 (5) |
| Highly cited | No |