Download the most recent version of my full CV.
Some highlights of my research:
Read the NASA LIVE science story about of of my most recent papers:
Solar Superstorms of the Past Help NASA Scientists Understand Risks for Satellites
Solar Superstorms of the Past Help NASA Scientists Understand Risks for Satellites
A figure of one of the papers I co-authored was chosen to feature in the cover of Space Weather (click on the image):
2019 AGU Fall Meeting
9-13 December 2019, San Francisco, CA
I will give the talk
Modeling satellite orbital drag during extreme magnetic storms
and present the following poster
Revisiting Carrington event with archival materials: Spatiotemporal Evolutions of a Large Sunspot Group and Great Auroral Storms
See other works with my co-authorship here.
The paper Hayakawa et al. (2019) was reported by the AGU blog GeoSpace: https://bit.ly/2N86Ouc
2019 AGU Chapman on Scientific Challenges Pertaining to Space Weather
Forecasting Including Extremes
11-15 February 2019, Pasadena, CA
I will present one of the invited talks whose title is
Satellite Orbital Drag During Extreme Geomagnetic Storms: How Accurate are our Predictions?
2019 AGU Fall Meeting
9-13 December 2019, San Francisco, CA
I will give the talk
Modeling satellite orbital drag during extreme magnetic storms
and present the following poster
Revisiting Carrington event with archival materials: Spatiotemporal Evolutions of a Large Sunspot Group and Great Auroral Storms
See other works with my co-authorship here.
The paper Hayakawa et al. (2019) was reported by the AGU blog GeoSpace: https://bit.ly/2N86Ouc
2019 AGU Chapman on Scientific Challenges Pertaining to Space Weather
Forecasting Including Extremes
11-15 February 2019, Pasadena, CA
I will present one of the invited talks whose title is
Satellite Orbital Drag During Extreme Geomagnetic Storms: How Accurate are our Predictions?
One of my papers made it to the cover of Space Weather in June (click on the image):
Hello and welcome to my website! I am a space physics scientist at the NASA Goddard Space Flight Center (NASA/GSFC), located in Greenbelt, MD, USA. I am also a faculty member of the Goddard Planetary Heliophysics Institute (GPHI) at the University of Maryland, Baltimore County (UMBC), Baltimore, MD, USA. My field of research is the study of the coupling between the solar wind, magnetosphere, and the upper regions of the Earth's atmosphere, the ionosphere and the thermosphere. Currently I am interested in thermosphere neutral density upwelling during geomagnetic storms. The understanding of the thermosphere physics is important because the thermosphere is the orbit region of government and commercial satellites, as well as other human assets, such as the International Space Station (ISS). The thermosphere is also the region where aurora occurs (see animation below). For example, during storm times, the tracking of satellite orbits becomes very difficult to be predicted and the satellite may lose altitude due to atmospheric air drag. In my research, I work on satellite data analysis and conduct numerical simulations in order to support my observations.
Causes of the aurora: in this simulation by NASA, a CME(coronal mass ejection) is launched by the Sun and hits the Earth's magnetosphere. When the z component of the IMF (interplanetary magnetic field) is directed southward, magnetic reconnection occurs and the charged particles (protons, electrons and other ions) that compound the solar wind plasma may go deep down into the ionosphere. Field-aligned currents (FACs) are created and electromagnetic energy is dissipated in the process in which charged particles excite atoms and molecules in the thermosphere by collisions. Those atoms emit the excess of energy in form of light. As a result, the aurora is created in high latitude regions of the Earth's atmosphere.
Denny M. Oliveira
NASA Goddard Space Flight Center
Goddard Planetary Heliophysics Institute, UMBC
Office @ NASA/GSFC Building 21, Room 234
Phone #: +1(301) 286-1206
email: [email protected]
NASA Goddard Space Flight Center
Goddard Planetary Heliophysics Institute, UMBC
Office @ NASA/GSFC Building 21, Room 234
Phone #: +1(301) 286-1206
email: [email protected]