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The first determination of atmospheric phosphine in Antarctica

机译：南极洲大气磷化氢的首次测定

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It is generally thought that phosphine (PH_3) 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 PH_3 on the Antarctic Millor Peninsula is reported in this paper. No PH_3 was detected in the air samples around 10:00 when it was sunny. However, PH_3 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 PH_3 concentrations around 22:00 were generally higher than those around 10:00 in January and they were almost the same in February. In addition, PH_3 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 PH_3 concentration. It is very surprising to have found that high concentrations of PH_3 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 PH_3 survival and cause the concentration to increase and accumulate in the local atmosphere. New approaches for the PH_3 formation and the process of atmospheric chemistry may exist under such an extreme environment. Atmospheric PH_3 may also be from the emissions of local sources.
机译：人们普遍认为，对流层低层偏远地区的磷化氢（PH_3）浓度在夜间以低ng / m〜3的水平存在，而在白天则以pg / m〜3的水平存在。本文报道了南极米勒半岛气态PH_3的首次测定。晴天10:00左右在空气样本中未检测到PH_3。然而，在多云或小雪的所有10:00空气样本中均发现PH_3，平均值为75.3±28.8 ng / m〜3（n = 5）。在22:00左右的几乎所有样本中也发现了这种现象，平均值为87.2±70.9 ng / m〜3（n = 11）。 1月22:00左右的大气PH_3浓度通常高于1月的10:00左右，2月的浓度几乎相同。另外，随着空气温度的降低，PH_3浓度在22:00左右呈下降趋势，这表明光强度和空气温度对大气PH_3浓度具有重要影响。令人惊讶的是，在强烈的紫外线辐射和光强度的影响下，南极大气中存在高浓度的PH_3。初步分析表明，干燥，寒冷和非常干净的气氛可能非常适合PH_3的生存，并导致浓度增加并累积在本地气氛中。在这样的极端环境下，可能存在PH_3形成和大气化学过程的新方法。大气PH_3也可能来自当地来源的排放。

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