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Rainfall and Temperature Variations over Burkina Faso: Possible Influence of Geomagnetic Activity, Solar Activity and Associated Energies from 1975 to 2020

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Atmospheric and Climate Sciences 2022年第4期12卷 603-612页

作者： Yacouba Sawadogo somaïla koala Jean Louis Zerbo laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi Boni Bobo-Dioulasso Burkina Faso Unité de Formation et de Recherche en Sciences Exactes et Appliquées (UFR/SEA) Université Nazi Boni Bobo-Dioulasso Burkina Faso

This study investigates climatic parameters (rainfall, and temperature) over Burkina Faso and the possible role of solar activity and its induced energies. Through morphological investigations, we analyzed solar activity indices (sunspot number, IMF, PC index, Cosmic rays) over the last three solar cycles (1975-2020). Results about interplanetary heating show that joule heating is well correlated with the dynamic pressure of the solar plasma. Climate parameters (rainfall, Temperature) variabilities are modulated by disturbances in solar activity: 1) quiet solar characterized by a drop in solar plasma’s parameters is associated with important cloud cover and consequently bring important rainfall which chills terrestrial atmosphere, 2) active solar characterized by important input energy is associated with weak incident cosmic ray consequently with low cloudiness which brings warming. Thus, the possible natural link can be suggested between solar activity and climatic parameters even if it is not the only factor of global warming.

关键词： Temperature Rainfall Solar Activity Geomagnetic Activity Climate Burkina Faso

Total Electron Content Diurnal and Seasonal Variations and Response to Solar Events at Koudougou Station in Burkina Faso

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International Journal of Geosciences 2023年第9期14卷 827-839页

作者： Yacouba Sawadogo M’Bi Kaboré somaïla koala Arouna Mandé Jean Louis Zerbo laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi BONI Bobo-Dioulasso Burkina Faso

In this paper, we studied the seasonal behavior of the total electron content (TEC) during a part of solar cycle 24 ascending, maximum and decreasing phases at Koudougou station (latitude: 12°15'09"N Longitude: 2°21'45"W). Response of TEC to solar recurrent events is presented. The highest values of the TEC in 2014, 2015 and 2016 were recorded on March and October, while in 2013 they were recorded on April and November, corresponding to equinox months. This observation shows that TEC values at the equinoxes are higher than those of solstices. Moreover, the monthly TEC varies in phase with the sunspots number showing a linear dependence of the TEC on solar activity. The ionospheric electron contents are generally very low both before noon and during the night, but quite high at noon and after noon. This pattern of TEC variation is due to the fluctuation of incident solar radiation on the Earth’s equatorial ionosphere. During quiet periods, the number of free electrons generated is lower than that generated during recurrent periods, which shows a positive contribution of recurrent activity to the level of the TEC. Investigations have also highlighted a winter anomaly and equinoctial asymmetry in TEC behavior at Koudougou station.

关键词： Total Electron Content (TEC) Recurrent Activity Quiet Activity Seasonal Variation

Distributions and Structure of the Solar Wind during Solar Cycles 23 and 24

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International Journal of Geosciences 2023年第9期14卷 813-826页

作者： somaïla koala Wendkouni Paulin Bere Yacouba Sawadogo Issamaïl Ki Jean Louis Zerbo laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi BONI Bobo-Dioulasso Burkina Faso

To observe the level of interaction between the solar wind and the geomagnetic activity, we analyzed the distribution of the solar wind speeds according to the different classes of geomagnetic activity and the different phases of solar activity. We found that, the magnetic quiet activity reccord 80% of the solar wind speeds V s observed 88% of solar wind speeds V > 450 km/s. The shock activity observes 82% of the solar wind speeds V > 450 km/s. About 70% of the solar wind speeds V > 450 km/s, are observed in the corotating activity class. The cloud shock activity and fluctuating activity classes observed respectively 37% and 55% of the wind speeds V > 450 km/s. Furthermore, slow solar winds are mainly observed at the minimum phase of each solar cycle;but exceptionally the solar maximum phase of solar cycle 24, records a significant rate of slow solar wind. Shock winds are mainly observed around the solar maximum and recurrent winds are mainly observed at the descending phase of the solar cycle. Corotating stable winds and moderate shock winds dominate respectively at the descending phase and at the maximum phase.

关键词： Solar Wind Solar Activity Geomagnetic Activity Solar Cycle

Seasonal Variations of Solar Wind Parameters during Solar Cycles 23 and 24

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Open Journal of Applied Sciences 2022年第9期

作者： somaïla koala yacouba sawadogo jean louis zerbo

Rainfall and Temperature Variations over Burkina Faso: Possible Influence of Geomagnetic Activity, Solar Activity and Associated Energies from 1975 to 2020

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Atmospheric and Climate Sciences 2022年第4期

作者： yacouba sawadogo somaïla koala jean louis zerbo

Total Electron Content Diurnal and Seasonal Variations and Response to Solar Events at Koudougou Station in Burkina Faso

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International Journal of Geosciences（地球科学国际期刊） 2023年第9期

作者： Yacouba Sawadogo M’BiKaboré somaïla koala Arouna Mandé Jean Louis Zerbo

Distributions and Structure of the Solar Wind during Solar Cycles 23 and 24

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International Journal of Geosciences（地球科学国际期刊） 2023年第9期

作者： somaïla koala Wendkouni Paulin Bere Yacouba Sawadogo Issamaïl Ki Jean Louis Zerbo

The Playful Giant Pandas

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China Book International 2023年第3期 16-19页

作者： koala Can 不详

Wild giant pandas are not afraid of people but always take an evasive approach when encountering other *** pandas spend a lot of time with humans and are more gentle in *** up,a giant panda is nearly as tall as an adult.

关键词： species. Wild gentle

成长的烦恼,中国城市公共自行车数量全球第一的背后(下)

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中国自行车 2016年第1期 58-61页

作者： koala

公共自行车高速成长的背后,是低碳环保价值观的普及,是对绿色出行的现实需求;然而以机动车为中心的城市道路规划,给出了一个冰冷的回答。

关键词：城市道路规划自行车烦恼中国价值观机动车速成出行