Planetary Boundary Layer Height Simulation and its Long-term Trend in climate models and observations over East Asia
Abstract
Planetary boundary layer (PBL) plays an important role in climate and air quality simulations. Large uncertainties remain in PBL simulations and in understanding its long-term trend. In this study, radiosonde data and ERA-Interim reanalysis data are applied to evaluate PBL height (PBLH) simulations in climate models (including NCAR CESM2) over East Asia. Additional simulations are performed to investigate the sensitivity of simulated PBLH to different model parameterizations. Our results show that, models can generally reproduce a significant diurnal cycle of PBLH over East Asia especially in winter. PBLH directly derived from two different PBL schemes in CESM 2 are significantly different. Long-term trend in PBLH over East Asia is further examined in climate models, including results from the Coupled Model Inter-comparison Project Phase 6 (CMIP6) experimental data, and further sensitivity experiments are performed to examine contributing factors for long-term changes in PBLH, such as the effects of anthropogenic aerosols.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.A44A..04Y
- Keywords:
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- 0305 Aerosols and particles;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0317 Chemical kinetic and photochemical properties;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0345 Pollution: urban and regional;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 3311 Clouds and aerosols;
- ATMOSPHERIC PROCESSES