Seasonal distribution of ozone and radiation field at the stratosphere
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摘要: 利用美国NCAR化学气候耦合模式WACCM3对平流层温度场、风场、臭氧及辐射场进行了模拟.结果表明,在适宜飞艇长期驻留的准零风层高度20~22km(对应大气压强范围为50~30hPa,以下均采用气压值表征对应大气高度),7-8月风速小于5m·s-1的风带可长期稳定在40°N以北.臭氧空间分布显示,在30hPa气压高度处中国地区臭氧浓度出现了带状分布,30hPa高度以下低纬度地区臭氧浓度低于中纬度地区.平流层太阳加热率的时空变化表明,在平流层上层,太阳加热率可达100×10-6K·s-1,而在平流层下层,只有10×10-6K·s-1.6-8月中国区域的太阳加热率大于9月;在100~30hPa高度内,中纬度地区太阳加热率高于低纬度地区,在30hPa高度以上,低纬度地区太阳加热率高于中纬度地区;8-9月30~40hPa高度处,太阳加热率的空间变化较小.在30hPa高度上,太阳加热率在40°N昼夜变化最大;50hPa高度处,太阳加热率的昼夜变化小于30hPa高度处,而且白天太阳加热率出现极大值的纬度明显靠北.平流层低纬度地区的长波加热率小于中纬度地区.青藏高原由于地形特殊,其6-7月的臭氧浓度、太阳加热率和长波加热率均小于同纬度其他地区.Abstract: The coupled chemistry-climate model WACCM3 (Whole Atmosphere Community Climate Model) developed by NCAR is applied to study the seasonal variations of the stratospheric temperature, wind, ozone and radiation fields. The stratospheric quasi-zero wind layer at around 20~22km (i.e., atmosphere pressure range is 50~30hPa), where the wind speed is less than 5m·s-1 and is stable to the north of 40°N during July and August, is suitable for long-term stay of airships. There appears a belt of ozone at 30hPa over China and ozone concentrations are greater in the mid-latitudes than in the lower latitudes below 30hPa. There are significant seasonal spatial variations in solar heating rates in the stratosphere. In the upper stratosphere, the maximum solar heating rate reaches 100×10-6K·s-1 while in the lower stratosphere the maximum solar heating rate is only 10×10-6K·s-1. The solar heating rate is greater in June to August than in September over China. The solar heating rate is greater in the mid-latitudes than in the lower latitudes between 100hPa and 30hPa and is greater in the lower latitudes than in the mid-latitudes above 30hPa. The change of solar heating rate is small in August and September at 30hPa and 40hPa. The maximum diurnal variation of solar heating rate appears at 40°N at 30hPa. At 50hPa, the diurnal variation of solar heating rate is smaller than that at 40hPa and the maximum variation occurs farther south. The longwave heating rate is smaller in the lower latitudes than in the mid-latitude stratosphere. In particular condition of terrain, the ozone concentration, solar heating rate and longwave heating rate are smaller over Tibetan Plateau than other areas at the same latitude.
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Key words:
- Atmospheric physics and atmospheric environment /
- Seasonal distribution /
- WACCM3 /
- Wind /
- Ozone /
- Radiation field
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[1] Lü Daren, Sun Baolai, Li Liqun. Zero wind layer and the first dwell experiment of high-altitude ballon in China[J]. Target Envir. Feat, 2002, 22(1):45-51. In Chinese (吕达仁, 孙宝来, 李立群. 零风层与我国首次高空气球停留试验[J]. 目标与 环境特性研究, 2002, 22(1):45-51) [2] Tao Mengchu, He Jinhai, Liu Yi. Analysis of the characteristics of the stratospheric quasi-zero wind layer and the effect of the quasi-biennial oscillation on it[J]. Clim. Envir. Res., 2012, 17(1):92-102. In Chinese (陶梦初, 何金海, 刘毅. 平流层准零风层统计特征及准两年周期振荡对其 影响分析[J]. 气候环境与研究, 2012, 17(1):92-102) [3] Lü Daren, Chen Zeyu, Guo Xia, et al. Recent progress in near space atmospheric environment study[J]. Adv. Mech., 2009, 39(9):674-682. In Chinese (吕达仁, 陈泽宇, 郭霞, 等. 临近空间大气环境研究现状[J]. 力学进展, 2009, 39(9):674-682) [4] Yang Bing, Yang Jian, Li Xiaojiang, et al. Near space craft environment and environment influence[J]. Spacecr. Envir. Eng., 2008, 25(6):555-557 (杨秉, 杨健, 李小将, 等. 临近空间飞艇运行环境及其影响[J]. 航天器环境工程, 2008, 25(6):555-557) [5] Wang Yingjian. New advances of middle and upper atmosphere research in China[J]. Acta Geophys. Sin., 1997, 40(Supp.):29-36. In Chinese (王英鉴. 我国中高层大气观测研究的新进展[J]. 地球物理学报, 1997, 40(增):29-36) [6] Lü Daren, Chen Hongbin. Advances in middle atmosphere physics research[J]. Chin. J. Atmos. Sci., 2003, 27(4):750-769. In Chinese (吕达仁, 陈洪滨. 平流层和中层大气研究的进展[J]. 大气科学, 2003, 27(4):750-769) [7] Zhang Xiaofang, Yan Wei. Advances in studies on the exploration of the middle and upper atmosphere[J]. Sci. Meteor. Sin., 2007, 27(4):457-636. In Chinese (张晓芳, 严卫. 中高层大气探测技术的研究发展[J]. 气象科学, 2007, 27(4):457-636) [8] Collins W D, Rasch P J, Boville B A, et al. Description of the NCAR Community Atmosphere Model (CAM3)[M]. Nat. Cent. Atmos. Res., Boulder, Colo., 2004 [9] Garcia R R, Marsh D R, Kinnison D E, et al. Simulation of secular trends in the middle atmosphere, 1950-2003[J]. J. Geophys. Res., 2007, 112, D09301 [10] Liu Yi, Liu Chuanxi. Simulation studies on seasonal variations of the stratospheric dynamics and trace gases using coupled chemistry-climate model WACCM-3[J]. Chin. J. Space Sci., 2009, 29(6):580-590. In Chinese (刘毅, 刘传熙. 利用WACCM-3模式对 平流层动力、热力场及微量化学成分季节变化的数值模拟研究[J]. 空间科学学报, 2009, 29(6):580-590) [11] Rayner N A, Parker D E, Hotron E B, et al. Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century[J]. J. Geophys. Res., 2003, 109(D14) [12] Belmont A D, Dartt D G, Nastrom G D. Variations of stratospheric zonal winds, 20~65km, 1961-1971[J]. J. Appl. Meteor., 1975, 14(4):585-594 [13] Li Peng. The Relationship of Tibet Plateau Ozone and Tropopause[D]. Beijing: Graduate School of Chinese Academy of Sciences, 2007: 36-37. In Chinese (李鹏. 青藏高原大气臭氧与对流层顶的关系[D]. 北京: 中国科学院研究生院, 2007: 36-37) [14] Tian W, Chipperfield M, Huang Q. Effects of the Tibetan Plateau on total column ozone distribution[J]. Tellus B, 2008, 60(4):622-635 [15] Liao Guonan. Introduction of Atmospheric Radiation[M]. Beijing: Meteorological Press, 1985: 70-71, 118-119. In Chinese (廖国南. 大气辐射导论[M]. 北京: 气象出版社, 1985: 70-71, 118-119) [16] Wang Jiankai, Chen Weimin, Wu Pengfei, et al. Solar heating rate and infrared cooling rate in northern Tibetan Plateau and its neighborhood[J]. J. Nanjing Inst. Meteor., 2003, 26(3):324-332. In Chinese (王建凯, 陈渭民, 吴鹏飞, 等. 青藏高原北部及其邻近地区太阳加热率和太阳 红外冷却率[J]. 南京气象学院院报, 2003, 26(3):324-332)
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