鄱阳湖地区零平面位移及动力粗糙度的计算

doi:10.3969/j.issn.1673-503X.2021.05.009

气象与环境学报 ›› 2021, Vol. 37 ›› Issue (5): 56-62.doi: 10.3969/j.issn.1673-503X.2021.05.009

鄱阳湖地区零平面位移及动力粗糙度的计算

饶志娟^1,²(),朱彬³,汪如良⁴,刘熙明^5,*()

1. 江西省气象学会秘书处, 江西南昌 330096
2. 南京信息工程大学环境科学与工程学院, 江苏南京 210044
3. 南京信息工程大学大气物理学院, 江苏南京 210044
4. 江西省气象服务中心, 江西南昌 330096
5. 江西省气象科学研究所, 江西南昌 330096

收稿日期:2020-11-28 出版日期:2021-10-30 发布日期:2021-11-01
通讯作者: 刘熙明 E-mail:406754212@qq.com;jx_liuximing@126.com
作者简介:饶志娟, 女, 1986年生, 工程师, 主要从事环境气象相关研究工作, E-mail: 406754212@qq.com
基金资助:
国家自然科学基金(41765001);江西省气象局面上项目(201712)

Calculation of zero plane displacement and dynamic roughness length in Poyang lake area

Zhi-juan RAO^1,²(),Bin ZHU³,Ru-liang WANG⁴,Xi-ming LIU^5,*()

1. Secretariat of Jiangxi Meteorological Society, Nanchang 330096, China
2. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
3. School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
4. Jiangxi Meteorological Service Center, Nanchang 330096, China
5. Jiangxi Meteorological Research Institute, Nanchang 330096, China

Received:2020-11-28 Online:2021-10-30 Published:2021-11-01
Contact: Xi-ming LIU E-mail:406754212@qq.com;jx_liuximing@126.com

摘要/Abstract

摘要：

利用2013年7月1日至2014年6月30日鄱阳湖东岸70 m铁塔涡动相关观测资料，应用Martano方法和TVM（Temperature Variance Method）方法分别计算了该地地表零平面位移d和粗糙度z₀，通过代回Monin-Obukhov相似性理论的风廓线关系计算摩擦速度，以验证与实测摩擦速度的一致性。速度和温度标准差的归一化拟合线分别与Panosky等和Tillman给出的曲线趋势一致，表明该站观测数据总体满足近地层相似性。Martano方法计算结果随季节变化较大，春夏季的粗糙度是秋冬季的6.3倍；陆面方向零平面位移和粗糙度分别为来自湖面的2倍和10倍；Martano方法比TVM方法对季节和方向的敏感性更强。Martano方法计算得到零平面位移和粗糙度对摩擦速度造成了约9.9%的高估；而TVM方法对摩擦速度造成了约32.8%的高估；Martano方法计算的摩擦速度和观测值的一致性更好。

关键词: 空气动力学粗糙度, 零平面位移, 复杂下垫面

Abstract:

Based on the eddy correlation observation data of the 70-m tower on the east bank of Poyang lake from July 1, 2013 to June 30, 2014, the surface zero plane displacement and roughness length were calculated with the Martano method and TVM method (Temperature Variance Method). The friction velocity calculated by substituting the wind profile relation based on Monin-Obukhov similarity theory was compared with the observation for verifying their consistency. The results show that the normalized fitted curves of velocity and temperature standard deviations show a similar trend with the theoretical curves given by Panosky et al. and Tillman. The results calculated with the Martano method vary greatly with the season, and the roughness in spring and summer is 6.3 times larger than that in autumn and winter. The zero plane displacement and roughness for land surface are 2 times and 10 times larger than those for lake surface, respectively. Martano method is more sensitive to the season and direction relative to the TVM method. The friction velocity estimated with the Martano method causes about 9.9% overestimation for the friction velocity, while that with the TVM method results in an overestimation of about 32.8%. On the whole, it can be seen that the friction velocity calculated by the Martano method is better consistent with the observed value.

Key words: Aerodynamic roughness, Zero plane displacement, Complex underlying surface

中图分类号:

饶志娟,朱彬,汪如良,刘熙明. 鄱阳湖地区零平面位移及动力粗糙度的计算[J]. 气象与环境学报, 2021, 37(5): 56-62.

Zhi-juan RAO,Bin ZHU,Ru-liang WANG,Xi-ming LIU. Calculation of zero plane displacement and dynamic roughness length in Poyang lake area[J]. Journal of Meteorology and Environment, 2021, 37(5): 56-62.

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质量标志(QC)	湍流发展的充分性检验/(%)
1	0—15
2	16—30
3	31—50
4	51—75
5	76—100
6	101—250
7	251—500
8	500—1000
9	＞1000

P-T法分类	大气稳定度	L取值范围
A类	极不稳定	-13.00＜L＜0
B类	不稳定	-32.18＜L＜-13.00
C类	弱不稳定	-180.91＜L＜-32.18
D类	中性	L＜-180.91或L＞84.25
E类	弱稳定	20.97＜L＜84.25
F类	稳定	0＜L＜20.97

方法	春夏季		秋冬季		年平均		湖面		陆面
方法	d	z₀	d	z₀	d	z₀	d	z₀	d	z₀
Martano	2.6	0.0145	4.3	0.0023	3.5	0.0084	4.2	0.0012	8.6	0.0122
TVM	8.0	0.037	7.5	0.0166	7.8	0.0268	3.2	0.0034	4.4	0.0132

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[3]	何奇瑾,周广胜,周莉,王云龙. 盘锦芦苇湿地空气动力学参数动态特征及其影响因素分析[J]. 气象与环境学报, 2007, 23(4): 7-12.

鄱阳湖地区零平面位移及动力粗糙度的计算

Calculation of zero plane displacement and dynamic roughness length in Poyang lake area

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