摘要:

Summary. Our previous observations on sporadicEover Haringhata (Calcutta) during the partial solar eclipse of 1955 are critically examined against the background of other relevant information and present knowledge of sporadicE. It appears that the observed variation in sporadicEis related to the redistribution of ionized particles pertinent to the normalElayer and is in conformity with what has been suggested elsewhere for temperate latitude sporadicE.

ISSN:0148-0227    

DOI:10.1029/JA078i001p00320

年代:1973

数据来源: WILEY

摘要:

It is generally accepted that the hydroxyl emissions observed in the airglow spectrum originate from the hydrogen‐ozone reaction. Hence it is logical to use the observed emission intensities to infer the atomic hydrogen concentrations in the mesosphere. The volume reaction rate between O3and hydrogen can be calculated from the measured intensity of a particular band if the vibrational spectrum of the complete Meinel system is known. This spectrum has recently been calculated byEvans and Llewellyn[1972];the same calculation has also indicated that 4.8 photons are produced from each reaction between H and O

ISSN:0148-0227    

DOI:10.1029/JA078i001p00323

年代:1973

数据来源: WILEY

摘要:

Summary. The reaction of NO+with O3has been found to be unmeasurably slow at 300°K in laboratory flowing afterglow experiments,k<10−14cm³ sec−1. This reaction has conceivable importance as (1) a loss process for NO+in theDregion, where presently known loss processes are insufficient, (2) a possible source of NO2+, which has been observed in the ionosphere, and (3) a possible source of O2(¹Δg) in the atmosphere. The finding that the reaction is very slow weighs against its atmospheric importance.The reactionhas been suggested as a possible NO+loss process and NO2+source in a disturbed atmosphere [Bortner, 1966] and as a possible source of O2(¹Δg) in auroras [Swider, 1972]. In addition, an ion of mass 46+, presumably NO2+, has been observed in the undisturbed ionosphere [Narcisi, 1967], and (1) is a candidate for this. All these proposals are of interest and are somewhat pressing, since (1) current NO+loss processes are known to be insufficient, (2) known auroral O2(¹Δg) production processes are seriously deficient, and (3) no alternative source of NO2+has been suggested. With this situation in mind we have attempted to determine the rate constant for (1) in the NOAA flowing aftergl

ISSN:0148-0227    

DOI:10.1029/JA078i001p00327

年代:1973

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JA078i001p00330

年代:1973

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JA078i001p00332

年代:1973

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JA078i001p00335

年代:1973

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JA078i001p00337

年代:1973

数据来源: WILEY