Nighttime observation of the HO2 radical by an LIF instrument at Oki island, Japan, and its possible origins

被引：45

作者：

Kanaya, Y ^{[1
]}

Sadanaga, Y ^{[1
]}

Matsumoto, J ^{[1
]}

Sharma, UK ^{[1
]}

Hirokawa, J ^{[1
]}

Kajii, Y ^{[1
]}

Akimoto, H ^{[1
]}

机构：

[1] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 1999年 / 26卷 / 14期

关键词：

D O I：

10.1029/1999GL900475

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

HO2 (hydroperoxy) radical of unexpectedly high concentration around 3 ppt was measured by an instrument based on laser-induced fluorescence with NO addition at Oki island, Japan, on the night of August 9/10, 1998. We confirmed that the interference by atmospheric organic peroxy (RO2) radicals was insignificant and concluded that the measured signal originated from nighttime HO2. Model calculations constrained to ancillary measurements indicated that HO2 and RO2 were produced primarily via the reactions of ozone with olefins, especially those with internal olefins, and that NO3 chemistry was relatively unimportant. HO2 concentration was kept high by nighttime NO (similar to 10 ppt) via RO2 + NO reactions. Low NO2 (similar to 150 ppt) slowed NO3 production rate. Thus, the high observed HO2 suggests that the reactions of O-3 With olefins are important HOx primary production mechanisms in the relatively clean atmosphere.

引用

页码：2179 / 2182

页数：4

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