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| RAMS模式在金塔地区非均匀下垫面上的适用性研究 | |
| 引用本文： | 李万莉,吕世华,傅慎明,杨胜朋,尚伦宇.RAMS模式在金塔地区非均匀下垫面上的适用性研究[J].高原气象,2009,28(5):966-977. |
| 作者姓名： | 李万莉 吕世华 傅慎明 杨胜朋 尚伦宇 |
| 作者单位： | 1. 中国科学院,寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃,兰州,730000;中国科学院研究生院,北京,100049 2. 中国科学院,寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃,兰州,730000 3. 中国科学院研究生院,北京,100049;中国科学院,大气物理研究所,北京,100029 |
| 基金项目： | 国家自然科学基金重点项目 |
| 摘 要： | 为检验RAMS模式在金塔地区的模拟性能， 首先选2005年7月2~3日金塔地区的一次晴好天气过程, 然后利用RAMS及MM5模式对该过程进行了48 h三重嵌套的数值模拟, 最后对金塔绿洲、 戈壁及沙漠点近地面各变量的模拟值及实测值进行了对比分析。结果表明： RAMS模式对绿洲、 戈壁和沙漠不同下垫面近地面温度的模拟表现良好， 基本模拟出了近地面相对湿度的日变化趋势， 较好地模拟出了绿洲\_沙漠环流引起的绿洲“冷岛效应”和临近绿洲的戈壁与沙漠上空的“逆湿”现象； RAMS模式对绿洲下垫面潜热通量的模拟比感热通量更接近实况， 而对戈壁和沙漠下垫面感热通量的模拟好于潜热通量， 三种下垫面上净辐射的模拟都与观测值较接近； 同MM5模式的模拟结果比较， RAMS模式对非均匀下垫面净辐射、 感热通量的数值模拟更优于MM5模式。这表明RAMS模式在金塔地区应用的可行性。 |
| 关 键 词： | 金塔地区 RAMS和MM5中尺度模式 非均匀下垫面 非线性偏差 |
Research on Applicability of RAMS under Heterogeneous Land Surface in Jinta Oasis, Gansu |
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| LI Wan-li,L Shi-hua,FU Shen-ming,YANG Shen-peng,SHANG Lun-yu.Research on Applicability of RAMS under Heterogeneous Land Surface in Jinta Oasis, Gansu[J].Plateau Meteorology,2009,28(5):966-977. | |
| Authors: | LI Wan-li L Shi-hua FU Shen-ming YANG Shen-peng SHANG Lun-yu |
| Affiliation: | LI Wan-li,L(U) Shi-hua,FU Shen-ming,YANG Shen-peng,SHANG Lun-yu |
| Abstract: | To test the simulation performance of the RAMS model in Jinta, Gansu, a sunny day process on 2～3 July 2005 in Jinta oasis and its surroundings was chosen, then a 48 h simulation for the chosen weather process have been running with the triple-nested in RAMS4.4 and MM5V3.6 models; again then the simulated and observed results for the near surface temperature, humidity, wind speed, surface energy at Jinta Oasis, Gobi and Desert sites on 2～3 July 2005 were compared with each other. The main conclusions are as follows: The simulation of near surface temperature on oasis, desert and Gobi is better. The daily changes of near surface relative humidity is exactly simulated. The simulated results reappear "the old island effect" of oasis and "inversion humidity phenomenon" of desert which is near to the oasis. The simulated surface latent heat fluxes are more consistent with observations than surface sensible heat fluxes on oasis. The simulated surface sensible heat fluxes are better than latent heat fluxes on Gobi and desert. The simulated net radiation is consistent with observations on three different surface. The comparison between RAMS results and MM5 results show that the net radiation and sensible flux on different surface simulated by RAMS are better than MM5. The bias between simulated wind and observation is big, because onflow is randomicity, the great mass of bias result from nonlinear bias. |
| Keywords: | Jinta region RAMS and MM5 models Heterogeneous land surface Nonlinear bias |
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