STRATOSPHERIC AEROSOL GROWTH AND HNO3 GAS-PHASE DEPLETION FROM COUPLED HNO3 AND WATER-UPTAKE BY LIQUID PARTICLES

被引：314

作者：

CARSLAW, KS ^{[1
]}

LUO, BP ^{[1
]}

CLEGG, SL ^{[1
]}

PETER, T ^{[1
]}

BRIMBLECOMBE, P ^{[1
]}

CRUTZEN, PJ ^{[1
]}

机构：

[1] MAX PLANCK INST CHEM,W-6500 MAINZ,GERMANY

来源：

GEOPHYSICAL RESEARCH LETTERS | 1994年 / 21卷 / 23期

关键词：

D O I：

10.1029/94GL02799

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Aqueous sulphuric acid droplets, which constitute the background stratospheric aerosol, strongly absorb HNO3 and HCl under cold conditions. A thermodynamic model is used to predict partitioning of HNO3, HCl and H2O between gas and aerosol phases, and show that a 50-fold increase in aerosol volume, observed in the Arctic stratosphere as temperature approached the frost point (188.9 K), can be explained in terms of uptake of HNO3 and H2O by liquid aerosols. Calculated degrees of saturation of the droplets with respect to solid hydrates, taking into account the reduction in vapour phase HNO3, suggest that the droplets remain liquid to the frost point. Near this temperature, they can yield larger aerosol volumes than would have been the case for solid NAT (HNO3.3H2O) particles. The depletion of gas phase HNO3 into enhanced volumes of liquid aerosols resulting from volcanic eruptions may hamper NAT formation.

引用

页码：2479 / 2482

页数：4

共 23 条

[1] INTERPRETATION OF MEASUREMENTS MADE BY THE FORWARD SCATTERING SPECTROMETER PROBE (FSSP-300) DURING THE AIRBORNE ARCTIC STRATOSPHERIC EXPEDITION [J].