Soil Nitrite as a Source of Atmospheric HONO and OH Radicals

被引：421

作者：

Su, Hang ^{[1
]}

Cheng, Yafang ^{[2
,3
]}

Oswald, Robert ^{[1
]}

Behrendt, Thomas ^{[1
]}

Trebs, Ivonne ^{[1
]}

Meixner, Franz X. ^{[1
,4
]}

Andreae, Meinrat O. ^{[1
]}

Cheng, Peng ^{[2
]}

Zhang, Yuanhang ^{[2
]}

Poeschl, Ulrich ^{[1
]}

机构：

[1] Max Planck Inst Chem, Biogeochem Dept, D-55020 Mainz, Germany

[2] Peking Univ, Coll Environm Sci & Engn, SKJ Lab Environm Simulat & Pollut Control, Beijing 100871, Peoples R China

[3] Univ Iowa, Ctr Global & Reg Environm Res, Iowa City, IA 52242 USA

[4] Univ Zimbabwe, Dept Phys, Harare, Zimbabwe

来源：

SCIENCE | 2011年 / 333卷 / 6049期

关键词：

NITROUS-ACID; HUMIC-ACID; OXIDE; DEPOSITION; EXCHANGE; DIOXIDE; FOREST; SOOT;

D O I：

10.1126/science.1207687

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Hydroxyl radicals (OH) are a key species in atmospheric photochemistry. In the lower atmosphere, up to similar to 30% of the primary OH radical production is attributed to the photolysis of nitrous acid (HONO), and field observations suggest a large missing source of HONO. We show that soil nitrite can release HONO and explain the reported strength and diurnal variation of the missing source. Fertilized soils with low pH appear to be particularly strong sources of HONO and OH. Thus, agricultural activities and land-use changes may strongly influence the oxidizing capacity of the atmosphere. Because of the widespread occurrence of nitrite-producing microbes, the release of HONO from soil may also be important in natural environments, including forests and boreal regions.

引用

页码：1616 / 1618

页数：3

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