CAJ | 학술논문

陆面过程模拟研究中的一个关键问题是如何准确的计算陆气间能量交换，但现有的陆面过程模式模拟的湍流通量与观测值间仍然存在较大偏差，因此改进湍流通量的参数化方案对于提高陆面过程模式模拟能力有重要意义。本研究通过改进陆面过程模式SHAW中的热力粗糙度方案，以及引入干表层蒸发方案，以期改善湍流通量的模拟能力。在此基础上利用黄土高原半干旱区SACOL站观测资料，进行模式改进前后的单点模拟对比试验，研究其参数化方案改进对陆面过程模拟的影响。结果表明：改进后的SHAW模式能够合理地模拟黄土高原半干旱区陆面特征的变化趋势，模拟值与观测值偏差较小。与原来的SHAW模式模拟结果相比，改进后的SHAW_MOD模式显著提高了湍流通量的模拟能力，并改善了净辐射和深层土壤温度的模拟，但对土壤湿度的改进并不明显，这可能与土壤内部水热传输过程及相关参数化方案有关，还有待做进一步研究。
륙면과정모의연구중적일개관건문제시여하준학적계산륙기간능량교환，단현유적륙면과정모식모의적단류통량여관측치간잉연존재교대편차，인차개진단류통량적삼수화방안대우제고륙면과정모식모의능력유중요의의。본연구통과개진륙면과정모식SHAW중적열력조조도방안，이급인입간표층증발방안，이기개선단류통량적모의능력。재차기출상이용황토고원반간한구SACOL참관측자료，진행모식개진전후적단점모의대비시험，연구기삼수화방안개진대륙면과정모의적영향。결과표명：개진후적SHAW모식능구합리지모의황토고원반간한구륙면특정적변화추세，모의치여관측치편차교소。여원래적SHAW모식모의결과상비，개진후적SHAW_MOD모식현저제고료단류통량적모의능력，병개선료정복사화심층토양온도적모의，단대토양습도적개진병불명현，저가능여토양내부수열전수과정급상관삼수화방안유관，환유대주진일보연구。
A key problem in the land surface simulation study is accurately modeling the surface energy budget.But the turbulent heat flux simulated by current land surface models was remarkable deviated from the observations.Therefore,parameterizing the surface tur-bulent heat transport process is vital for improving land surface simulation ability.In this study,land surface model SHAW is em-ployed,by improving the thermal roughness parameterization schemes and introducing dry surface layer evaporation schemes to improve the turbulent heat flux simulation.By using the data obtained at SACOL site in Loess Plateau and the modified SHAW model,a single point simulation is studied.Simultaneously,the SHAW model simulations are compared to investigate the effect of the modified param-eterization schemes.Results suggest that the modified model can well simulate all the change tendency of the land surface characteris-tics in semi-arid region,the bias was small between simulations and observations.Compared with the original SHAW model,the modified model significantly improved the turbulent heat flux simulation,and better simulated net radiation,but the simulated soil tem-perature and moisture were not obviously improved,this maybe attribute to the water and heat transfer process and parameterization schemes related in the soil layers and need to study in the future.