WRF模式中不同边界层及云微物理方案对两次黄海海雾个例数值模拟的影响
Impact of Boundary Layer and Cloud Microphysics Schemes in WRF Model on Numerical Simulation of Two Yellow Sea Fog Cases
中文摘要：
利用WRF模式及其循环三维变分同化系统，以发生在2006年3月6—8日和2012年3月27—28日的两次大范围黄海海雾事件为研究对象，针对不同的边界层方案和云微物理方案，设计了4组海雾数值模拟对比试验。模拟结果显示：对于2006年较为浓厚的海雾个例，边界层方案采用YSU、云微物理方案采用Lin得到的模拟雾区与观测事实最为相符；YSU和Thompson方案、MYNN和Lin方案的组合模拟结果次之。边界层方案采用MYJ时，无论采用何种云微物理方案，模拟结果均较差。而对于2012年较为淡薄的海雾个例，采用不同云微物理方案之间的差异较小，采用不同的边界层方案得到的模拟雾区差异显著。采用MYNN边界层方案得到的模拟雾区与观测事实最为相符，而YUS和MYJ方案均不能很好地模拟出此次海雾过程。
中文关键词：
黄海海雾，WRF模式，数值模拟，边界层方案，云微物理方案
KeyWords：
sea fog over the Yellow Sea, WRF model, numerical simulation, boundary layer scheme, microphysical scheme
Abstract：
Four groups of numerical experiments covering two heavy sea fog events (March 6-8, 2006 and March 27-28,2012) over the Yellow Sea were conducted by using WRF model and its 3DVAR system. The simulation results showed that the simulated fog areas were very similar to the observation for the dense sea fog case in 2006 if YSU was adopted as boundary layer scheme and Lin was chosen as cloud microphysical scheme. The simulated fog areas of YSU and Thompson scheme, MYNN and Lin scheme came second. When adopting MYJ as boundary layer scheme, the simulated fog areas were very poor compared with observation regardless of the cloud microphysical scheme. For the thin sea fog case in 2012, simulated sea fog area mostly depended on boundary layer scheme but little on cloud microphysical scheme. The best combination of boundary layer scheme was MYNN, while neither YUS nor MYJ can properly simulate the sea fog process.