| 东南极内陆地区和乌鲁木齐河源1号冰川表层雪内NO^—3沉积后过程差异 |
| |
| 引用本文： | 杨惠根,刘瑞源.东南极内陆地区和乌鲁木齐河源1号冰川表层雪内NO^—3沉积后过程差异[J].极地研究,1999,10(2):81-87. |
| |
| 作者姓名： | 杨惠根 刘瑞源 |
| |
| 作者单位： | 中国科学院兰州冰川冻土研究所冰芯与寒区环境开放研究实验室 |
| |
| 基金项目： | 国家自然科学基金,中国科学院95重大项目,攀登计划预选项目,中国科学院天山冰川观测试验站基金 |
| |
| 摘 要： | 酸性气体成分（如ＮＯ－３）的强挥发性导致其在雪面沉降后，具有沉积后气／雪交换作用，即其在表层雪内是“可逆”沉降的。通过比较东南极内陆雪坑的ＮＯ－３剖面和乌鲁木齐河源１号冰川表层雪内ＮＯ－３的浓度变化，认为沉积后气／雪交换作用在东南极内陆较显著，而在乌鲁木齐河源１号冰川则不然。表层雪内ＮＯ－３存在方式的不同和沉降机制的差异应是导致两地ＮＯ－３沉积后过程差异的原因所在。
|
| 关 键 词： | NO_3~－ 表层雪 沉积后过程 东南极内陆 乌鲁木齐河源1号冰川 |
Simultaneous observations of Syowa East HF radar and Zhongshan Station optical aurora associated with the solar wind negative pressure impulse |
| |
| Hou Shugui,Qin Dahe,Xiao Cunde and Ren Jiawen.Simultaneous observations of Syowa East HF radar and Zhongshan Station optical aurora associated with the solar wind negative pressure impulse[J].Chinese Journal of Polar Research,1999,10(2):81-87. |
| |
| Authors: | Hou Shugui Qin Dahe Xiao Cunde and Ren Jiawen |
| |
| Abstract: | The field of views of the Syowa East HF radar covers over Zhongshan Station (magnetic latitude ~ 74. 5°S). We examined the relation between HF radar signatures and optical aurora by using the data obtained on 3 Augusl 1997. A geomagnetic negative sudden impulse (SI- ) occurred at ~ 1432 UT on 3 August 1997associated with the sudden decrease of solar wind plasma density. From the behavior of the optical aurora observed by all-sky TV camera and scanning photometers at Zhongshan Station, a sudden enhancement of auroral emission intensity and poleward moving signature occurred associated with the negative SI. It is intcresting that the temporal and spatial variations of the HF radar backscatter power showed one to one correlations with optical aurora data. The details of this event are examined and compared with the data onboard WIND sate1lite and from ground based magnetometers. |
| |
| Keywords: | NO - 3 surface snowpack depositional processes East Antarctica headwater of Urumchi River |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《极地研究》浏览原始摘要信息 |
| 点击此处可从《极地研究》下载免费的PDF全文 |
