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Estimating the maximum of the smoothed highest 3-hourly aa index in 3 d by the preceding minimum for the solar cycle

Autor: Z. L. Du

Publikováno v: Annales Geophysicae. 38:1237-1245

Predicting the maximum intensity of geomagnetic activity for an upcoming solar cycle is important in space weather service and for planning future space missions. This study analyzed the highest and lowest 3-hourly aa index (aaH∕aaL) in a 3 d inter

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8524b08bcf38055ff5ee0803f5461f71
https://doi.org/10.5194/angeo-38-1237-2020

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Akademický článek

The correlation between solar and geomagnetic activity – Part 1: Two-term decomposition of geomagnetic activity

Autor: Z. L. Du

Publikováno v: Annales Geophysicae, Vol 29, Pp 1331-1340 (2011)

By analyzing the logarithmic relationship between geomagnetic activity as represented by the annual aa index and solar magnetic field activity as represented by the annual sunspot number (Rz) during the period 1844–2010, aa is shown to lie in b

Externí odkaz: https://doaj.org/article/71bf4001d3724d82b51d37e99cb70822

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Akademický článek

The correlation between solar and geomagnetic activity – Part 2: Long-term trends

Autor: Z. L. Du

Publikováno v: Annales Geophysicae, Vol 29, Pp 1341-1348 (2011)

Using lag-correlation function analysis, the correlation coefficient at zero lag (r0), the maximum (rm) and the corresponding lag time (Lm) between solar (Rz) and geomagnetic (aa) activity for a 528-month (44-year) running time window are shown t

Externí odkaz: https://doaj.org/article/e16399cacdd1494d86d7450ef150d879

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Akademický článek

The correlation between solar and geomagnetic activity – Part 3: An integral response model

Autor: Z. L. Du

Publikováno v: Annales Geophysicae, Vol 29, Pp 1005-1018 (2011)

An integral response model is proposed to describe the relationship between geomagnetic activity (aa index) and solar activity (represented by sunspot number Rz): The aa at a given time t is the integral of Rz at past times (t'≤t) multiplied

Externí odkaz: https://doaj.org/article/51ffe3c4dbda40218529fbc6a12da4fa

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The solar cycle: predicting the peak of solar cycle 25

Autor: Z. L. Du

Publikováno v: Astrophysics and Space Science. 365

Motivated by a successful prediction on the peak of solar cycle 24 (81.7, comparable to the observed 81.9, Du in Astrophys. Space Sci. 338:9, 2012), based on the logarithmic relationship between the maximum amplitude ( $R_{ \mathrm{m}}$ ) of a solar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2175c16233ad0d919a0af5730e0b31ab
https://doi.org/10.1007/s10509-020-03818-1

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Predicting the maximum aa/Ap index through its relationship with the preceding minimum

Autor: Z. L. Du

Predicting the strength and peak time of geomagnetic activity for the ensuing cycle 25 is important in space weather service for planning future space missions. The minimum aa geomagnetic index around the solar minimum has been often used to predict

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4b4863c8ac69562959998c950d573f8e
https://doi.org/10.5194/angeo-2020-15

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Akademický článek

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