摘要
利用1979年5—8月青藏高原科学实验取得的资料,对1979年6月15日00GMT100—850hPa 等9层 FGGEⅢb 分析的高度和风场进行了客观分析订正,并以订正前后的资料为初值,用 T21L5和 T42L9两种不同分辨率的北半球谱模式作了5个5天预报的数值试验。研究结果表明,通过高原实验资料对 FGGEⅢb 资料的订正,将使 FGGEⅢb 资料在高原地区的分析得到改善。对流层上层的资料订正比下层效果明显。高原地区初值场的订正对数值预报结果有显著影响,并且对较高分辨率模式的预报结果影响更大。初值订正后不仅影响未来高原地区的预报,而且通过能量频散可以影响到我国东部和日本,大约经过5天左右,甚至可以影响到阿拉斯加和北美。
Five numerical tests were performed by using a northern hemispheric spectrum model withtwo different resolutions,T21L5 and T42L9,for OO GMT 15—20 June,1979.The initial fieldsused are the FGGE-Ⅲ b data at 00 GMT over hte Qinghai-Xizang Plateau.The results show thatthere are certain errors on FGGE Ⅲ b data over the Plateau,and the errors in the upper tropo-sphere are larger than those in lower troposphere.The correction of initial data over the Plateauhas a remarkable effect on numerical forecast results,especially on the results of the model withhigher resolution.The corrected initial fields affect not only the forecast over the Plateau,but alsothe east of China and Japan through energy dispersion,even Alaska and Northern America inabout five days.
出处
《应用气象学报》
CSCD
北大核心
1992年第3期281-288,共8页
Journal of Applied Meteorological Science
基金
中期数值天气预报课题
