SIMULTANEOUS OBSERVATIONS OF SPORADIC-E, NA, FE, AND CA+ LAYERS AT URBANA, ILLINOIS - 3 CASE-STUDIES

被引：77

作者：

GARDNER, CS ^{[1
]}

KANE, TJ ^{[1
]}

SENFT, DC ^{[1
]}

QIAN, J ^{[1
]}

PAPEN, GC ^{[1
]}

机构：

[1] UNIV ILLINOIS, DEPT ELECT & COMP ENGN, 1406 W GREEN ST, URBANA, IL 61801 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 1993年 / 98卷 / D9期

关键词：

D O I：

10.1029/93JD01477

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

We describe three sporadic layering events observed in the mesospheric metal layers above Urbana, Illinois, using resonance fluorescence lidars and an MF radar. On June 6-7, 1991, a sporadic Na layer and a prominent temperature inversion layer were observed near 90 km. The formation of this low-altitude event appears to involve the release of Na from a chemical reservoir or from the surfaces of dust and smoke particles, perhaps facilitated by the high temperatures in the inversion layer. On December 10, 1991, sporadic Fe and Ca+ layers formed near 94 and 95 km, respectively, and on December 17-18, 1991, sporadic E, Fe, Na, and Ca+ layers formed simultaneously near 100 km. The characteristics of these December events suggest that sporadic Fe and high-altitude sporadic Na layers are formed by the neutralization of Fe+ and Na+ in the associated sporadic E layers.

引用

页码：16865 / 16873

页数：9

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