The general pattern of auroral particle precipitation
1967; Elsevier BV; Volume: 15; Issue: 2 Linguagem: Inglês
10.1016/0032-0633(67)90197-3
ISSN1873-5088
Autores Tópico(s)Atmospheric Ozone and Climate
ResumoGross statistical data on optical- and radio-auroral phenomena are examined to establish the latitude-versus-time pattern for the causal particle precipitation. Although these phenomena may occur at any time of day at auroral-zone latitudes, they are shown to occur most frequently at about 08 and 22 hours geomagnetic time. These two dominant diurnal maxima exhibit radically different characteristics, indicating that two distinct particle populations are involved on the average. Further, the two types of precipitation are recognizable at other times of day in the statistical data, although at a reduced intensity, leading to a two-zoned precipitation pattern in which there is a clear separation between the zones during most of the day. The most prominent features of the precipitation in the zone with the night-time maximum are shown to be the impulsive character of the precipitation and its steep energy spectrum, whereas the zone with the morning maximum is best described as having a continuous influx with a much flatter particle spectrum. On the basis of detailed studies of these characteristics, of observations on other related ionospheric parameters, and of direct particle measurements made with rockets and satellites it seems plausible to associate the two particle populations with different regions of the magnetosphere. This relationship to the magnetospheric structure and to the processes therein is discussed for both the 'splash' and 'drizzle' types of precipitation. Пa;c;c;мa;T;p;ивa;юT;c;я c;T;a;T;иc;T;иkhcy;e;c;киe; дa;H;H;ыe; пo; o;пT;иkhcy;e;c;ким и p;a;диo;-пo;ляp;H;ым явлe;H;иям, khcy;T;o;бы o;пp;e;дe;лиT;ь кa;p;T;иH;y; щиp;o;T;ы-в-o;T;H;o;щe;H;ии вp;e;мe;H;и для пp;иkhcy;иH;H;o;й c;вязи выпa;дe;H;ия o;c;a;дкo;в khcy;a;c;T;иц. H;e;c;мo;T;p;я H;a; T;o;, khcy;T;o; дa;H;H;ыe; явлe;H;ия мo;гy;T; y;c;мa;T;p;ивa;T;ьc;я в любo;e; вp;e;мя H;a; щиp;o;T;a;ч пo;ляp;H;o;й зo;H;ы, o;H;и, пo;видимo;мy;, khcy;a;щe; вc;e;гo; пp;o;иc;чo;дяT; в пp;ибл. 08 и 22 khcy;a;c;a; гe;o;мa;гH;иT;H;o;гo; вp;e;мe;H;и. ЭT;и двa; дo;миH;иp;y;ющиe; e;жe;дH;e;вH;ыe; мa;кc;имy;мы o;бH;a;p;y;живa;юT; c;o;вe; p;щe;H;H;o; p;a;злиkhcy;H;ыe; чa;p;a;кT;e;p;иc;T;ики, c;видe;T;e;льc;T;вy;ющиe; o; T;o;м, khcy;T;o; здe;c;ь зa;м e;щa;H;ы, в c;p;e;дH;e;м, двa; o;T;лиkhcy;имыч H;a;c;e;лe;H;ий khcy;a;c;T;иц. Дa;лe;e;, в c;T;a;T;иc;T;иkhcy;e;c;кич дa; H;H;ыч пp;изH;a;юT;c;я двa; видa; выпa;дe;H;ия o;c;a;дкo;в и в дp;y;гиe; пe;p;иo;ды дH;я, чo;T;я и c; зa;H;ижe;H;H;o;й иH;T;e;H;c;ивH;o;c;T;ью, khcy;T;o; пp;ивo;диT; к двy;чзo;H;H;o;й кo;H;фигy;p;a;ции выпa;дe;H;ия o;c;a; дкo;в, в кo;T;o;p;o;й зo;H;ы khcy;e;T;кo; p;a;здe;лe;H;ы в T;e;khcy;e;H;иe; бo;льщe;й khcy;a;c;T;и дH;я. y;кa;з ывa;e;T;c;я, khcy;T;o; H;a;ибo;лe;e; выдa;ющимиc;я чa;p;a;кT;e;p;иc;T;икa;ми выпa;дe;H;ия o;c;a;дкo;в в зo;H;e; c; иo;khcy;H;ыми мa;кc;имy;мa;ми являюT;c;я: импy;льc;T;вH;ый чa;p;a;кT;e;p; o;c;a;ждe;H;ия и кp;y;T;изH;a; e;гo; c;пe;кT;p;a; эH;e;p;гии, в T;o; вp;e;мя кa;к в зo;H;e; c; y;T;p;e;H;H;им мa;кc;имy;мo;м H;a;бл юдa;e;T;c;я H;e;пp;e;p;ывH;ый H;a;плыв и гo;p;a;здo; бo;лe;e; плo;c;кий c;пe;кT;p; khcy;a;c;T;иц. H;a; o;c;H;o;вe; дe;T;a;льH;ыч иc;c;лe;дo;вa;H;ий эT;ич чa;p;a;кT;e;p;иc;T;ик, H;a;блюдe;H;ий H;a;д дp;y;гими, c;o;o;T;вe;T;c;T;вe; иH;ыми пa;p;a;мe;T;p;a;ми иo;H;o;c;фe;p;ы, и H;e;пo;c;p;e;дc;T;вe;H;H;ыч измe;p;e;H;ий пp;и пo;мo;щи p;a;кe; и c;пy;T;H;икo;в, впo;лH;e; лo;гиkhcy;H;o; пo;видимo;мy; a;c;c;o;цииp;o;вa;T;ь o;бa; H;a;c;e;лe;H;ия khcy;a;c;T;иц c; p;a;злиkhcy;H;ыми o;блa;c;T;ями мa;гH;иT;o;c;фe;p;ы. T;a;кa;я c;вязь c;o; c;T;p;y;кT;y;p;o;й мa;гH;иT;o;c;фe;p;ы и c;o;дe;p;жa;щимиc;я вH;e;й пp;o;цe;c;c;a;ми, o;бc;y;ждa;e;T;c;я кa;к для ⪡вc;плe;c;кивa;ющe;гo;⪢, T;a;к и для ⪡мo;p;o;c;ящ e;гo;⪢ видo;в выпa;дe;H;ия o;c;a;дкo;в.
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