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The first determination of atmospheric phosphine in Antarctica
  • ISSN号:1001-6538
  • 期刊名称:科学通报(英文版)
  • 时间:0
  • 页码:131-135
  • 语言:中文
  • 分类:P46[天文地球—大气科学及气象学]
  • 作者机构:[1]Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China, [2]State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210093, China
  • 相关基金:Supported by the National Natural Science Foundation of China (Grant Nos. 40676005 and 40406001), AAD Science Project 2873 and the 0pening Foundation of State Key Laboratory of Soil and Sustainable Agriculture
  • 相关项目:南极法尔兹半岛苔原环境介质中磷化氢(PH3)的产生与排放过程
中文摘要:

磷化氢(PH_3 ) 集中在更低的对流层的遥远的空气在日光期间在夜里期间并且在 pg/m~3 水平在 lowng/m~3 水平存在,这通常被认为。南极 Millor 半岛上的气体的 PH_3 的第一颗决心在这篇论文被报导。没有 PH_3 在 10:00 附近在空气样品被检测是否是阳光充足的。然而,当它是有 75.3 ± 2 的一般水准的多云或轻的雪时, PH_3 在所有 10:00 空气样品被发现 8.8 ng/m~3 (n=5 ) 。它也与 87.2 ± 7 的一般水准在 22:00 附近在将近所有被发现样品 0.9 ng/m~3 (n=11 ) 。在 22:00 附近的大气的 PH_3 集中通常比在在 1 月的 10:00 附近的那些高,他们是几乎在 2 月的一样。另外,在 22:00 附近的 PH_3 集中与减少的空气温度显示出一个落之趋势,建议轻紧张和空气温度有大气的 PH_3 集中上的重要效果。它很令人吃惊成立了 PH_3 的高集中在强壮的紫外放射、轻的紧张的影响下面在 Antarcticatmosphere 存在。试验分析证明干燥、冷、很干净的空气可能对 PH_3 幸存很合适并且引起集中在本地空气增加并且积累。为 PH_3formation 和大气的化学的过程的新途径可以在如此的极端环境下面存在。大气的 PH_3 可能也从本地来源的排出物。

英文摘要:

It is generally thought that phosphine (PH3) concentrations exist at the low ng/m^3 level during the night and at the pg/m^3 level during daylight in the remote atmosphere of the lower troposphere. The first determination of gaseous PH3 on the Antarctic Millor Peninsula is reported in this paper. No PH3 was detected in the air samples around 10:00 when it was sunny. However, PH3 was found in all the 10:00 air samples when it was cloudy or light snow with the average of 75.3±28.8 ng/m^3 (n=5). It was also found in nearly all the samples around 22:00 with the average of 87.2±70.9 ng/m^3 (n=11). Atmospheric PH3 concentrations around 22:00 were generally higher than those around 10:00 in January and they were almost the same in February. In addition, PH3 concentrations around 22:00 showed a downtrend with the decreasing air temperature, suggesting that light intensity and air temperature had an important effect on atmospheric PH3 concentration. It is very surprising to have found that high concentrations of PH3 exist In the Antarctic atmosphere under the influence of strong UV-radiation and light intensity. The tentative analyses show that dry, cold and very clean atmosphere may be very suitable for the PH3 surviral and cause the concentration to increase and accumulate in the local atmosphere. New approaches for the PH3 formation and the process of atmospheric chemistry may exist under such an extreme environment. Atmospheric PH3 may also be from the emissions of local sources.

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