A5008873396- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Astro and Planetary Science
- Solar Radiation and Photovoltaics
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- Tree-ring climate responses
- Geology and Paleoclimatology Research
- Climate variability and models
- Photovoltaic System Optimization Techniques
- Plant Water Relations and Carbon Dynamics
- Spacecraft Design and Technology
- History and Developments in Astronomy
- Solar Thermal and Photovoltaic Systems
- Global Energy and Sustainability Research
- Geological and Geophysical Studies
- Atmospheric chemistry and aerosols
- Planetary Science and Exploration
- Calibration and Measurement Techniques
- solar cell performance optimization
- Historical Astronomy and Related Studies
- Coastal and Marine Dynamics
National Institute for Space Research
2016-2025
Universidade Estadual de Campinas (UNICAMP)
2025
George Mason University
2022
University of Minho
2020
Universidade Federal de Minas Gerais
2020
Laboratoire de Physique et Chimie de l’Environnement et de l’Espace
2011-2012
Université d'Orléans
2010-2012
Centre National de la Recherche Scientifique
2010-2012
Max Planck Institute for Solar System Research
2007-2011
Max Planck Society
2008-2009
Abstract. Simulations of climate over the Last Millennium (850–1850 CE) have been incorporated into third phase Paleoclimate Modelling Intercomparison Project (PMIP3). The drivers this period are chiefly orbital, solar, volcanic, changes in land use/land cover and some variation greenhouse gas levels. While these effects can be easily defined, reconstructions volcanic use-related forcing more uncertain. We describe here approach taken defining scenarios used PMIP3, document discuss likely...
Aims. We present a physically consistent reconstruction of the total solar irradiance for Holocene. Methods. extend SATIRE models to estimate evolution (and partly spectral) over The basic assumption is that variations are due dark and bright magnetic features on surface. decadally averaged flux computed from decadal values cosmogenic isotope concentrations recorded in natural archives employing series physics-based connecting processes modulation cosmic ray heliosphere their record...
Abstract. A long-standing task in climate research has been to distinguish between anthropogenic change and natural variability. prerequisite for fulfilling this is the understanding of relative roles external drivers internal variability carbon cycle. Here, we present first ensemble simulations over last 1200 years with a comprehensive Earth system model including fully interactive Applying up-to-date reconstructions forcing recent low-amplitude estimates solar variations, reproduce...
Abstract. We update the forcings for PMIP3 experiments Last Millennium to include new assessments of historical land use changes and discuss suggestions calibrating solar activity proxies total irradiance.
Solar irradiance is the main external driver of Earth's climate. Whereas total solar source energy input into climate system, UV exerts control over chemical and physical processes in upper atmosphere. The time series accurate measurements are, however, relatively short limit assessment contribution to change. Here we reconstruct spectral range 115–160,000 nm since 1610. evolution photospheric magnetic flux, which a central model, appraised from historical record sunspot number using simple...
We improve the description of evolution Sun's open and total magnetic flux on time scales years to millenia. In model employed here solar is computed from emerging at surface in form bipolar features, which related sunspot number cycle parameters can be estimated historical records. Compared earlier versions addition long-lived flux, now also a more rapidly decaying component considered. The are constrained by comparing its output with observations reconstruction based geomagnetic indexes. A...
Abstract. A long-standing task in climate research has been to distinguish between anthropogenic change and natural variability. prerequisite for fulfilling this is the understanding of relative roles external drivers internal variability carbon cycle. Here, we present first ensemble simulations over last 1200 years with a comprehensive Earth system model including fully interactive Applying up-to-date reconstructions forcing recent low-amplitude estimates solar variations, reproduce...
Abstract Magnetopause shadowing and wave‐particle interactions are recognized as the two primary mechanisms for losses of electrons from outer radiation belt. We investigate these mechanisms, using satellite observations both in interplanetary space within magnetosphere particle drift modeling. Two shocks/sheaths impinged upon magnetopause causing a relativistic electron flux dropout. The magnetic cloud (MC) structure sunward MC had primarily northward field, perhaps leading to concomitant...
We present a comparative study of high-intensity long-duration continuous AE activity (HILDCAA) events, both isolated and those occurring in the "recovery phase" geomagnetic storms induced by corotating interaction regions (CIRs). The aim this is to determine difference, if any, relativistic electron acceleration magnetospheric energy deposition. All HILDCAA events solar cycle 23 (from 1995 through 2008) are used study. Isolated characterized enhanced fluxes electrons compared pre-event flux...
The sudden enhancement in the mesospheric neutral metal layers (Ns) has been studied different latitudes for decades. Specifically, at 23°S, Sodium Ns have analyzed since their first observation end of seventies. Several studies reported during events energetic particle precipitation (EPP) and formation auroral-type sporadic E (Es a ) high-latitude stations. Es are also observed Brazilian low-latitude sector EPP due to South American Magnetic Anomaly (SAMA). However, despite extensive on...
A complex active region in the Sun’s photosphere from 8 May 2024, produced seven halo-type Coronal Mass Ejections (CMEs) following extreme solar flares. These events generated Solar Energetic Particles (SEPs) that propagated toward Earth, culminating an geomagnetic storm (SYM-H = −497 nT) 10 to 13 2024. This study analyzes photosphere, interplanetary medium, inner radiation belt, and space weather impacts on neutral atmosphere E F ionospheric layers over South Atlantic Magnetic Anomaly...
Descrevemos um experimento simples e de baixo custo para observar investigar o salto hidráulico circular. Nosso modelo, acessível a estudantes graduação no início do curso, apresenta bom acordo com os resultados experimentais. Este trabalho permite que explorem, tanto teoricamente quanto experimentalmente, conceitos básicos mecânica dos fluidos.
The variability in solar irradiance, the main external energy source of Earth's system, must be critically studied order to place effects human‐driven climate change into perspective and allow plausible predictions evolution climate. Accurate measurements total irradiance (TSI) by instruments onboard space platforms during last three cycles indicate changes approximately 0.1% over sunspot cycle. Physics‐based models also suggest variations same magnitude on centennial millennia time‐scales....
The dynamics of the electron population in Earth’s radiation belts affect upper atmosphere’s ionization level through low-energy Electron Precipitation (EP). impact EP on high-latitude ionosphere has been well explained since 1960’s decade. Conversely, it is still not understood for region South American Magnetic Anomaly (SAMA). In this study, we present results analysis strong geomagnetic storm associated with Interplanetary Coronal Mass Ejection (May 27-28, 2017). atypical auroral sporadic...
The study of the physical processes that drive variability Earth's climate system is one most fascinating and challenging topics research today. Perhaps largest uncertainties in our ability to predict change are cloud formation process interaction clouds with radiation. Here we show southern Pacific Ocean effects on net radiative flux atmosphere related intensity magnetic field through lower cosmic ray effects. In inner region Southern Hemisphere Magnetic Anomaly (SHMA) it observed a cooling...
Abstract. Simulations of climate over the Last Millennium (850–1850 CE) have been incorporated into third phase Paleoclimate Modelling Intercomparison Project (PMIP3). The drivers this period are chiefly orbital, solar, volcanic, changes in land use/land cover and some variation greenhouse gas levels. While these effects can be easily defined, reconstructions volcanic use-related forcing more uncertain. We describe here approach taken defining scenarios used PMIP3, document discuss likely...
Abstract. The purpose of this study is to present a wavelet interactive filtering and reconstruction technique apply the solar wind magnetic field components detected at L1 Lagrange point ∼ 0.01 AU upstream Earth. These filtered interplanetary (IMF) data are fed into model calculate time series which we call AE∗. This was adjusted assuming that reconnection associated with southward-directed IMF Bz main mechanism transferring energy magnetosphere. calculated AE∗ compared observed AE (auroral...