CAJ | 학술논문

利用2005-2011年10次春季黄海海雾个例开展 WRF 模式参数化方案敏感性研究。结果表明：边界层方案对 WRF 模式雾区模拟结果起决定作用，而微物理方案影响较小，它主要影响海雾浓度和高度。边界层与微物理方案的最佳组合为 YSU 与 Lin 方案，最差为 Mellor-Yamada 与 WSM5方案；Mellor-Yamada 和 QNSE 方案模拟的近海面湍流过强，导致边界层过高，不利于海雾的发展与维持；而 MYNN 与 YSU 方案刻画的湍流强度与边界层高度合适，有利于海雾发展与维持。MYNN 方案虽与 YSU 方案相当，但在大多数海雾个例中，后者明显优于前者，而在有些个例中却刚好相反。因此对于某一具体海雾个例而言，所用边界层方案仍需在它们之中选择最优者。这些信息可为黄海海雾 WRF 模式边界层与微物理方案的选择与改进提供参考。
이용2005-2011년10차춘계황해해무개례개전 WRF 모식삼수화방안민감성연구。결과표명：변계층방안대 WRF 모식무구모의결과기결정작용，이미물리방안영향교소，타주요영향해무농도화고도。변계층여미물리방안적최가조합위 YSU 여 Lin 방안，최차위 Mellor-Yamada 여 WSM5방안；Mellor-Yamada 화 QNSE 방안모의적근해면단류과강，도치변계층과고，불리우해무적발전여유지；이 MYNN 여 YSU 방안각화적단류강도여변계층고도합괄，유리우해무발전여유지。MYNN 방안수여 YSU 방안상당，단재대다수해무개례중，후자명현우우전자，이재유사개례중각강호상반。인차대우모일구체해무개례이언，소용변계층방안잉수재타문지중선택최우자。저사신식가위황해해무 WRF 모식변계층여미물리방안적선택여개진제공삼고。
Sea fog is a water vapor condensation phenomenon,which happens in marine atmospheric boundary layer (MABL).Low atmospheric visibility caused by sea fog brings huge threat to maritime transporta-tion,fishery and oil-drilling operations.Therefore,it is becoming increasingly important and being paid more and more attention.In recent years,meso-scale atmospheric numerical modeling has become a domi-nant way for the mechanism study and numerical modeling of sea fog. <br> Previous studies on sea fog indicate that sea fog modeling is very sensitive to initial conditions,espe-cially realistic representation of temperature and humidity profile in MABL.Besides initial conditions,tur-bulence process and cloud generating process are the other important aspects for sea fog modeling.In a me-so-scale atmospheric numerical model,the turbulence process is described by planetary boundary layer (PBL)scheme,and the cloud generating process is determined by microphysics (MP)scheme.Due to the uncertainties of the modeling result and the complexities of turbulence and cloud microphysics processes, many options of PBL and MP schemes are available for choice focusing on different modeling purposes. <br> Based on the Weather Research and Forecasting (WRF)model and cycling three-dimensional varia-tional method,sensitivity study of WRF PBL and MP schemes for the Yellow Sea fog is conducted,focu-sing on 10 typical widely-spread sea fog cases.The result indicates that simulated sea fog area mostly de-pends on PBL scheme but little on MP scheme;density and depth of simulated sea fog are affected by MP scheme with cloud droplet number being predicted and how it is prescribed.The best combination of PBL and MP schemes is YSU and Lin,while the worst is Mellor-Yamada and WSM5.The Mellor-Yamada and QNSE scheme brings about much stronger turbulence simulation,resulting in much higher boundary lay-er,and therefore it’s not favorable to the development and maintenance of sea fog,while turbulence inten-sity and boundary layer height produced by MYNN and YSU schemes benefit sea fog developing.MYNN scheme can match YSU scheme in general,however,the latter performs better in most cases while the for-mer is better in certain ones.In depth investigation is needed to tell whether MYNN or YSU PBL scheme is better for a given sea fog case.These information can provide hints to choose and improve PBL and MP schemes of WRF for the Yellow Sea fog numerical prediction system in the near future.