钠层密度翻转现象的激光雷达观测与研究

大气与环境光学学报 ›› 2014, Vol. 9 ›› Issue (3): 179-187.

钠层密度翻转现象的激光雷达观测与研究

龚少华1*, 刘正宽2, 田大伟2, 沈振江1, 孙书娟1, 羊大力1, 王林茂1, 林红1, 洪丽1, 刘汉军1

(1海南师范大学物理与电子工程学院，海南海口 571158;
2中国科学院国家空间科学中心空间天气国家重点实验室, 北京 100190)

收稿日期:2013-09-29 修回日期:2013-11-15 出版日期:2014-05-28 发布日期:2014-05-21
通讯作者: 龚少华 (1976-)，男，湖北黄冈人，博士后，副教授，主要从事大气激光遥感技术和微纳结构的激光光谱学研究。 E-mail:shhgong@gmail.com
作者简介:龚少华 (1976-)，男，湖北黄冈人，博士后，副教授，主要从事大气激光遥感技术和微纳结构的激光光谱学研究。
基金资助:
国家自然科学基金（41264006）、中国博士后科学基金(20110490609)、海南省自然科学基金(413127)资助

Lidar Observations and Investigation on Density Overturning in Sodium Layer

GONG Shao-hua1, *, LIU Zheng-kuan 2, TIAN Da-wei 2, SHEN Zhen-jiang1, SUN Shu-juan1, YANG Da-li1，WANG Lin-mao1, LIN Hong1, HONG Li1, LIU Han-jun1

(1 School of Physics and Electronics Engineering, Hainan Normal University, Haikou, 571158, China;
2 State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China)

Received:2013-09-29 Revised:2013-11-15 Published:2014-05-28 Online:2014-05-21

摘要/Abstract

摘要：

基于国家子午工程项目钠激光雷达的长期观测数据, 统计分析了北京和海南两地出现的钠层密度翻转现象，发现这种现象往往出现在钠层的下部，宽度在2~7 km范围，持续时间约为2~8 h。观测结果显示，钠层密度翻转结构的出现常伴随着大尺度重力波的传播活动，且钠层密度翻转的消失过程也和较大尺度重力波的破碎过程有较好的对应关系。这表明，除风剪切和自身动力学不稳定因素外，大尺度和小尺度重力波相互作用引起的垂直对流不稳定效应可能是大尺度重力波破碎的另一个重要原因。

关键词: 钠激光雷达, 密度翻转结构, 重力波破碎

Abstract:

Based on the long-term observations from Meridian Project lidars, the density overturning phenomena in the sodium layer above Beijing and Hainan are statistically analyzed. It is found that the density overturning structures generally occur in the bottomside of the sodium layer and typically last for 2~8 h with a width of 2~7 km. The observation results reveal that, the occurrence of those overturning structures are always accompanied with the propagations of large-scale gravity waves, and the disappearance are also related to the breaking process of large-scale gravity waves. These observations indicate that the convective instabilities arising from the interaction of large- and small-scale waves are probably another main reason for the breaking of large-scale gravity wave, except for the dynamic instability and the shear.

Key words: sodium lidar, density overturning structure, breaking of gravity wave

中图分类号:

p351

龚少华刘正宽田大伟沈振江孙书娟羊大力王林茂林红洪丽刘汉军. 钠层密度翻转现象的激光雷达观测与研究[J]. 大气与环境光学学报, 2014, 9(3): 179-187.

GONG Shao-Hua, LIU Zheng-Kuan, TIAN Da-Wei, CHEN Zhen-Jiang, SUN Shu-Juan, YANG Da-Li, WANG Lin-Mao, LIN Hong, HONG Li, LIU Han-Jun. Lidar Observations and Investigation on Density Overturning in Sodium Layer[J]. Journal of Atmospheric and Environmental Optics, 2014, 9(3): 179-187.

参考文献

[1] Bernard R. Etude interferentielle de laradiation jaune λ5893 ? du ciel crepusculaire et preuve de la presence du sodium dans la haute atmosphere [M]. Paris: C. R. Acad. Sci., 1938. 928-930.
[2] Bowman M, Gibson A, Sandford M. Atmospheric sodium measured by a tuned laser radar [J]. Nature, 1969, 221: 456-457.
[3] Clemesha B, Kirchhoff V, Simonich D M, et al. Evidence of an extra-terrestrial source for the mesospheric sodium layer [J]. Geophys. Res. Lett., 1978, 5(10): 873-876.
[4] Chapman S. Notes on atmospheric sodium [J]. Astrophys. J., 1939, 90: 309-316.
[5] Plane J. The chemistry of meteoric metals in the Earth's upper atmosphere [J]. International Reviews in Physical Chemistry, 1991, 10(1): 55-106.
[6] Gardner C, Voelz D. Lidar studies of the nighttime sodium layer over Urbana, Illinois, 2. Gravity waves [J]. J. Geophys. Res., 1987, 92(A5): 4673-4694.
[7] Yi F, Zhang S, Zeng H, et al. Lidar observations of sporadic Na layers over Wuhan (30.5°N, 114.4°E) [J]. Geophys. Res. Lett., 2002, 29(9): 1345.
[8] Yang G, Clemesha B, Paulo B, et al. Improvement in the technique to extract gravity wave parameters from lidar data [J]. J. Geophys. Res., 2008, 113: D19111.
[9] Hecht J H, Waltersheid R L, Fritts D C, et al. Wave breaking signatures in OH airglow and sodium densities and temperatures, 1. Airglow imaging, Na lidar, and MF radar observations [J]. J. Geophys. Res., 1997, 102(D6): 6655-6668.
[10] Fritts D C, Isler J R, Hecht J H, et al. Wave breaking signatures in OH airglow and sodium densities and temperatures, 2. Simulation of wave and instability structures [J]. J. Geophys. Res., 1997, 102(D6): 6669-6684.
[11] Collins R L, Smith R W. Evidence of damping and overturning of gravity waves in the Arctic mesosphere: Na lidar and OH temperature observations [J]. J. Atmos. Terr. Phys., 2004, 66(10): 867-879.
[12] Xu J, Smith A K, Collins R L, et al. Signature of an overturning gravity wave in the mesospheric sodium layer: Comparison of a nonlinear photochemical-dynamical model and lidar observations [J]. J. Geophys. Res., 2006, 111(D17): D17301.
[13] Fritts D, Alexander M. Gravity wave dynamics and effects in the middle atmosphere [J]. Reviews of Geophysics, 2003, 41(1): 3-3.
[14] Fritts D C, Isler J R, Andreassen I. Gravity wave breaking in two and three dimensions 2. Three-dimensional evolution and instability structure [J]. J. Geophys. Res., 1994, 99(D4): 8109-8123.
[15] Wang C. New chains of space weather monitoring stations in China [J]. Space Weather, 2010, 8(8): S08001.
[16] Gong S, Yang G, Xu J, et al. Statistical characteristics of atmospheric gravity wave in the mesopause region observed with a sodium lidar at Beijing, China [J]. J. Atmos. Terr. Phys., 2013, 97: 143-151.
[17] Kirchhoff V, Clemesha B, Simonich D. The atmospheric neutral sodium layer. I- Recent modeling compared to measurements [J]. J. Geophys. Res., 1981, 86: 6892-6898.
[18] Plane J, Cox R, Rollason R. Metallic layers in the mesopause and lower thermosphere region [J]. Advances in Space Research, 1999, 24(11): 1559-1570.
[19] Xu J, Smith A K. Evaluation of processes that affect the photochemical timescale of the sodium layer [J]. J. Atmos. Terr. Phys., 2005, 67: 1216-1225.
[20] Yang G, Clemesha B, Paulo B, et al. Lidar study of the characteristics of gravity waves in the mesopause region at a southern low-latitude location [J]. J. Atmos. Terr. Phys., 2008, 70(7): 991-1011.
[21] Zhou Q, Mathews J D. Generation of sporadic sodium layers via turbulent heating of the atmosphere? [J]. J. Atmos. Terr. Phys., 1995, 57(11): 1309-1315.
[22] States R J, Gardner C. Structure of the mesospheric Na layer at 40°N latitude: seasonal and diurnal variations [J]. J. Geophys. Res., 1999, 104: 11783-11798.