适用于平坦草原的近地层以上风廓线推算方法
METHOD OF WIND SPEED PROFILE EXTRAPOLATING FROM SURFACE OBSERVATIONS OVER FLAT GRASSLAND
贺园园 1程雪玲 2朱蓉3
作者信息
- 1. 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京 100029;中国科学院大学,北京 100049
- 2. 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京 100029;中国科学院大学地球与行星科学学院,北京 100049
- 3. 国家气候中心,北京 100081
- 折叠
摘要
为得到从地面观测数据推测高层风廓线的表达式,基于锡林浩特国家气候观象台1年的观测,确定粗糙度、边界层高度和地转风计算方法,将不同稳定度的平均风廓线与建立的边界层风廓线模型计算结果进行比较.研究发现:基于再分析资料得到的地转阻力参数预测的地转风与实际地转风接近,对数风廓线在中性和不稳定情况下计算准确,且计算方法简单;Deaves-Harris模型适用于强风情况;改进混合长的Gryning模型和考虑Ekman层科氏力的两层风廓线模型在不同的稳定度情况下模拟结果均比较准确,但计算方法复杂;改进的Gryning模型适用于夜间残留层的风廓线模拟.
Abstract
To establish expressions for determining high-level wind profiles using ground-based observations,this research validated various methods to determine the roughness,boundary layer height,and geostrophic wind speed,based on 1-year of observations from the Xilinhot National Climatological Observatory.On this basis,the average wind profiles under different stability conditions were compared with the caculation results of established boundary layer wind profile models.The results demonstrated that the predicted geostrophic wind speeds based on geostrophic resistance drag parameters obtained from reanalysis data are close to the actual wind speeds.The logarithmic wind profile model can provide accuracy and simple cauculation under neutral and unstable conditions.The Deaves-Harris(DH)model was suitable for strong winds.The modified mixing-length Gryning model and the two-layer wind profile model that considers the Ekman layer Coriolis force can obtain relative accurate simulations under different stability conditions,albeit with the disadvantage of requiring complex computational procedures.The improved Gryning model is suitable for simulating wind profiles for the nocturnal residual layer.
关键词
风速/风能/稳定度/大气廓线/Monin-Obukhov相似理论Key words
wind speed/wind energy/stability/atmospheric profile/Monin-Obukhov similarity theory引用本文复制引用
基金项目
国家重点研发计划(2018YFB1501100)
出版年
2024
NETL
NSTL
万方数据