科学技术与工程
科學技術與工程
과학기술여공정
SCIENCE TECHNOLOGY AND ENGINEERING
2015年
22期
105-112
,共8页
刘寿东%梁宇飞%朴美花%王咏薇%齐德莉
劉壽東%樑宇飛%樸美花%王詠薇%齊德莉
류수동%량우비%박미화%왕영미%제덕리
太湖%NCAR湖泊子模型%消光系数%湖表粗糙长度
太湖%NCAR湖泊子模型%消光繫數%湖錶粗糙長度
태호%NCAR호박자모형%소광계수%호표조조장도
Lake Taihu%NCAR lake sub-model%extinction coefficient%lake surface roughness length
准确的湖泊-大气陆面过程方案对天气气候的模拟和预测十分重要。通过对内陆浅水湖泊太湖东部不同季节水生植物特征进行分析,调整了NCAR湖泊子模型的消光系数、湍流扩散系数及粗糙度等参数;利用东太湖避风港1号观测平台2012年1、4、7、10月的观测数据驱动离线湖模式,评估了NCAR湖泊子模型对不同季节感热通量、潜热通量、湖表温度及摩擦速度的模拟性能。结果表明,参数调整后的NCAR湖泊子模型的模拟结果在4个季节都有了不同程度的改善,其中感热通量模拟值与观测值的均方根误差由12.37 W·m-2减小到9.7 W·m-2,潜热通量由50.19 W·m-2减小到31.48 W·m-2,湖表温度由1.03℃减小到0.62℃,摩擦速度由0.23 m·s-1到0.10 m·s-1。
準確的湖泊-大氣陸麵過程方案對天氣氣候的模擬和預測十分重要。通過對內陸淺水湖泊太湖東部不同季節水生植物特徵進行分析,調整瞭NCAR湖泊子模型的消光繫數、湍流擴散繫數及粗糙度等參數;利用東太湖避風港1號觀測平檯2012年1、4、7、10月的觀測數據驅動離線湖模式,評估瞭NCAR湖泊子模型對不同季節感熱通量、潛熱通量、湖錶溫度及摩抆速度的模擬性能。結果錶明,參數調整後的NCAR湖泊子模型的模擬結果在4箇季節都有瞭不同程度的改善,其中感熱通量模擬值與觀測值的均方根誤差由12.37 W·m-2減小到9.7 W·m-2,潛熱通量由50.19 W·m-2減小到31.48 W·m-2,湖錶溫度由1.03℃減小到0.62℃,摩抆速度由0.23 m·s-1到0.10 m·s-1。
준학적호박-대기륙면과정방안대천기기후적모의화예측십분중요。통과대내륙천수호박태호동부불동계절수생식물특정진행분석,조정료NCAR호박자모형적소광계수、단류확산계수급조조도등삼수;이용동태호피풍항1호관측평태2012년1、4、7、10월적관측수거구동리선호모식,평고료NCAR호박자모형대불동계절감열통량、잠열통량、호표온도급마찰속도적모의성능。결과표명,삼수조정후적NCAR호박자모형적모의결과재4개계절도유료불동정도적개선,기중감열통량모의치여관측치적균방근오차유12.37 W·m-2감소도9.7 W·m-2,잠열통량유50.19 W·m-2감소도31.48 W·m-2,호표온도유1.03℃감소도0.62℃,마찰속도유0.23 m·s-1도0.10 m·s-1。
Accurate lake-air land surface process is important for simulation and prediction of weather and cli-mate. Seasonal changes of water plant characteristics in the east Taihu Lake were analyzed to adjust the extinction coefficient, eddy diffusion coefficient and roughness length in the NCAR lake sub-model;the observed data of east Lake Taihu BFG No. 1 platform on January, April, July, October of 2012 was used to drive offline lake model and evaluate the NCAR lake sub-model on sensible heat flux, latent heat flux, lake surface temperature and friction ve-locity in different seasons. The results show that, the simulation results using turned parameters have been im-proved in four seasons, especially, the root mean square error ( RMSE) of simulated and observed sensible heat flux reduces from 12. 37 W·m-2 to 9. 7 W·m-2 , the RMSE of latent heat flux reduces from 50. 19 W·m-2 to 31. 48 W·m-2 , the RMSE of lake surface temperature decreases from 1. 03 ℃ to 0. 62 ℃, and the RMSE of fric-tion velocity decreases from 0. 23 m·s-1 to 0. 10 m·s-1.