NITRITE IN OROGRAPHIC CLOUD AS AN INDICATOR OF NITROUS-ACID IN RURAL AIR

被引：29

作者：

CAPE, JN ^{[1
]}

HARGREAVES, KJ ^{[1
]}

STORETONWEST, R ^{[1
]}

FOWLER, D ^{[1
]}

COLVILE, RN ^{[1
]}

CHOULARTON, TW ^{[1
]}

GALLAGHER, MW ^{[1
]}

机构：

[1] UNIV MANCHESTER,INST SCI & TECHNOL,DEPT PURE & APPL PHYS,MANCHESTER M60 1QD,LANCS,ENGLAND

来源：

ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS | 1992年 / 26卷 / 13期

关键词：

NITROUS ACID; NITRITE; NITROGEN OXIDES; CLOUD; ATMOSPHERIC CHEMISTRY;

D O I：

10.1016/0960-1686(92)90361-N

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Continuous measurements of nitrite concentrations in orographic cloud have been combined with pH measurements to estimate the ps-phase concentration of nitrous acid (HONO) during late autumn 1990 at Great Dun Fell (847 m) in the north of England. Estimated HONO concentrations were up to 0.5 ppbV (0.5 x 10(-9) atm), and on average were ca 10% of the NOx (NO+NO2) concentration. Temporal variations showed no correlation with simultaneous measurements of NO2, suggesting that the nitrite measured in cloud water came from dissolution of gas-phase HONO rather than from heterogeneous reaction of NO2 in cloud. On three occasions, when measurements continued from afternoon into evening, estimated HONO concentrations increased after sunset, as expected from the relatively rapid photolytic destruction of HONO during the day. If gas-phase concentrations of HONO are typically 10% of NOx in rural areas, dry deposition of HONO may make a significant contribution to nitrogen deposition in upland forests, up to 3 kg N ha-1 yr-1.

引用

页码：2301 / 2307

页数：7

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