...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >COMPARISON OF ARCTIC AND ANTARCTIC TRACE GAS COLUMN ABUNDANCES FROM GROUND-BASED FOURIER TRANSFORM INFRARED SPECTROMETRY
【24h】

COMPARISON OF ARCTIC AND ANTARCTIC TRACE GAS COLUMN ABUNDANCES FROM GROUND-BASED FOURIER TRANSFORM INFRARED SPECTROMETRY

机译：基于地面的傅立叶变换红外光谱法比较北极和南极痕量气体柱的丰度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Column abundances of several atmospheric trace gases have been derived from solar absorption spectra measured from McMurdo, Antarctica (77.9 degrees S, 166.7 degrees E), in September and October 1986 and from solar and lunar absorption spectra recorded in Ny Alesund, Spitsbergen (78.9 degrees N, 11.9 degrees E), during winter and spring 1992-1995. The same analysis software, including the molecular spectroscopic parameters and initial volume mixing ratio profile shapes, was employed for both data sets to minimize the possibility of introducing systematic biases. The results clearly show that denitrification in the Antarctic lower stratosphere results in much smaller column abundances of HNO3 than in the Arctic. The springtime recovery of HCl in the Antarctic showed a stronger increase than in the Arctic. The ClONO2 peak occurred about 1 month later in the Antarctic and was found to be less pronounced than in the Arctic. After accounting for the 30% increase in total chlorine between 1986 and 1993, the minimum values for HCl + ClONO2 are similar in the Arctic and the Antarctic, indicating that both polar regions show nearly the same activation of chlorine during the polar night. However, in the Arctic the low values of HCl + ClONO2 start to recover in February, whereas in the Antarctic the lack of NO2, caused by the denitrification, delays the increase of HCl + ClONO2 by about 1 month. A simple one-dimensional model was able to reproduce the behavior of HCl and ClONO2, simply by assuming a one month later date for the last Antarctic polar stratospheric clouds together with greater latitude excursions of the Arctic air parcel trajectories. The model runs imply that in the Antarctic the reconversion of ClONO2 to HCl occurs about 1 month later than in the Arctic. Furthermore, the results imply that any differences in the O-3 depletion are caused mainly by differences in the stratospheric temperatures and dynamics and only to a small extent by the increased chlorine loading. The total column abundances of the short-lived tropospheric trace gases C2H6, C2H2, CO, and CH2O are found to be up to 10 times higher in the Arctic compared with the Antarctic, reflecting the hemispheric imbalance in production. [References: 29]
机译：几种大气中痕量气体的柱丰度是根据1986年9月和10月从南极McMurdo（南纬77.9度，东经166.7度）测量的太阳吸收光谱以及在Spitsbergen的Ny Alesund（78.9度）记录的太阳和月球吸收光谱得出的1992-1995年冬季和春季，N，11.9度E）。两个数据集使用相同的分析软件，包括分子光谱参数和初始体积混合比分布图形状，以最大程度地降低引入系统偏差的可能性。结果清楚地表明，与北极地区相比，南极平流层下部的反硝化作用会导致HNO3的柱丰度小得多。在春季，南极的HCl回收率显示出比北极更大的增长。 ClONO2高峰大约在1个月后在南极发生，发现不如北极明显。考虑到1986年至1993年间总氯含量增加了30％，在北极和南极，HCl + ClONO2的最小值相似，表明两个极地在极夜都显示出几乎相同的氯活化。但是，北极地区的HCl + ClONO2的低值已于2月份开始恢复，而南极地区由于反硝化而导致的NO2缺乏使HCl + ClONO2的增加延迟了大约1个月。一个简单的一维模型就能重现HCl和ClONO2的行为，只需假设最后一个南极极地平流层云在一个月后的日期以及北极航空包裹轨迹的更大纬度偏移即可。该模型表明，在南极，ClONO2向HCl的转化要比北极晚约1个月。此外，结果暗示O-3消耗量的任何差异主要是由于平流层温度和动力学的差异所致，并且仅在很小程度上是由氯含量的增加所致。发现与对流层中的南半球不平衡相比，在对流层中寿命短的对流层痕量气体C2H6，C2H2，CO和CH2O的总柱丰度比南极高10倍。 [参考：29]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号