Seminars for Scientists

Our Fall seminar series will begin on August 25th.

We are actively seeking speakers for our Fall 2016 seminar series, if you or a colleague would like to give a seminar please contact the Seminar Organizers Justin Deighan or Maria Usanova (firstname.lastname at LASP seminars are held every Thursday at 4:00 PM in the SPSC building, generally in room W120. Refreshments are served at 3:45. All LASP science seminars are open to visitors and our colleagues in other departments.

Current Schedule:

Current Schedule (expanded):

1/05/2017 – Bob Lysak; Alfvén Waves and Auroral Particle Acceleration

Speaker:   Bob Lysak (University of Minnesota)
Date & Time:   01/05 ,  4:00 PM Location: SPSC W120

Electrodynamic coupling between the magnetosphere and ionosphere is accomplished by means of the passage of Alfvén waves between these regions. These waves can be accompanied by parallel electric fields when the perpendicular scale size becomes small. There are two main regimes of this acceleration. At lower altitudes where the plasma is cold, electron inertial effects… Read more »

1/26/2017 – Masaki Fujimoto; Japan’s Space Science Program Going International

Speaker:   Masaki Fujimoto (JAXA)
Date & Time:   1/26 ,  4:00 PM Location: SPSC W120

Institute of Space and Astronautical Science (ISAS) is the science institute of the Japanese space agency JAXA. Its program has gone through a big transformation recently. One of the drivers behind the big change is to go international, by arranging transparent frameworks by which foreign participation will be done smoothly. For you to know what… Read more »

2/02/2017 – Li-Wei Hung; Protecting the Night Skies at Our National Parks

Speaker:   Li-Wei Hung (National Park Service)
Date & Time:   2/02 ,  4:00 PM Location: SPSC N100

The dark night sky is a characteristic of wilderness and is important to many parks as a natural, cultural, educational, and economic resources. Sky glow degrades the character of the night sky and especially the scenic quality of the horizon. Bright light domes can significantly alter nocturnal luminous environments even when they do not extend… Read more »

2/16/2017 – Ganna Portyankina; Enceladus jets: deciphering CASSINI’s occultation observations with models

Speaker:   Ganna Portyankina (LASP)
Date & Time:   2/16 ,  4:00 PM Location: SPSC W120

One of the most spectacular discoveries of the Cassini mission is jets emitting from the southern pole of Saturn’s moon Enceladus. The composition of the jets is water vapor and salty ice grains with traces of organic compounds. Jets, merging into a wide plume at a distance, are observed by multiple instruments on Cassini. The… Read more »

2/23/2017 – Karel Schrijver; Living with the Stars: How the Human Body is Connected to the Life Cycles of the Earth, the Planets, and the Stars

Speaker:   Karel Schrijver (Lockheed Martin)
Date & Time:   2/23 ,  5:30 PM Location: Fiske Planetarium

This talk connects the life cycles of stars to the life cycles of human cells by tracing the multi-faceted histories of the elements that make us. The body that is with us all our lives is always changing. We are quite literally not who we were years, weeks, or evendays ago: our cells die and… Read more »

3/02/2017 – Bill Lotko; What causes high-latitude thermospheric density anomalies?

Speaker:   Bill Lotko (Dartmouth College and NCAR/HAO)
Date & Time:   3/02 ,  4:00 PM Location: SPCS W120

Air density anomalies were recorded by the CHAMP satellite (nominal orbit at 400 km altitude) on 40% of its traversals through the dayside magnetic cusp. The anomalies are substantial density enhancements (>20%) over predictions of the MSIS empirical atmosphere model. They are typically accompanied by intense, small-scale magnetic fluctuations, which are commonly assumed to be… Read more »

3/09/2017 – Mary Hudson; Modeling radiation belt electron dynamics during the 17 March 2013 and 2015 storms

Speaker:   Mary Hudson (Dartmouth College)
Date & Time:   3/09 ,  4:00 PM Location: SPSC W120

The 17 March 2015 St. Patrick’s Day Storm is the largest geomagnetic storm to date of Solar Cycle 24, with a Dst of -223 nT. The magnetopause moved inside geosynchronous orbit under high solar wind dynamic pressure and strong southward IMF Bz causing loss, however a subsequent drop in pressure allowed for rapid rebuilding of… Read more »

4/13/2017 – Juan Roededer; From cosmic rays to radiation belts to global warming – Anecdotes from the early days

Speaker:   Juan G. Roederer (Geophysical Institute, University of Alaska Fairbanks)
Date & Time:   4/13 ,  4:00 PM Location: SPSC W120

Cosmic ray (CR) research can rightfully be called the prime precursor of space research. Initial interest focused on their composition and origin, their use to generate mesons and “strange particles”, and to study solar flares and interplanetary perturbations. I will tell about our work in the high Andes (1949-52) to measure the absorption of CRs… Read more »

4/27/2017 – Christopher Allison; Dream Chaser Cargo System Overview and Cargo Opportunities

Speaker:   Christopher Allison (Sierra Nevada Corp)
Date & Time:   4/27 ,  4:00 PM Location: SPSC W120

In January 2016, NASA selected SNC’s Dream Chaser Cargo System (DCCS) to provide cargo delivery, return, and disposal services for the International Space Station (ISS). Under the Commercial Resupply Services 2 (CRS2) contract, Dream Chaser will provide a minimum of six cargo service missions to and from the ISS between 2020 and 2024. The DCCS… Read more »

5/10/2017 – Gala Wind; A Radiance Simulator for Proofing of Planetary Passive Imager Retrieval Algorithms

Speaker:   Gala Wind (NASA Goddard)
Date & Time:   5/10 ,  4:00 PM Location: SPSC W120

Algorithm validation is a continuing issue for atmospheric remote sensing algorithms of every kind. Field campaigns and in-situ ground sites provide means of validation, but can be very limited in location and data amount or impossible altogether (for example when exploring planets other than our own). Existing and proposed remote sensing algorithms can benefit greatly… Read more »

5/11/2017 – Lisa Upton; Modeling Active Region Evolution – at the Sun’s Surface and into the Corona

Speaker:   Lisa Upton (UCAR)
Date & Time:   5/11 ,  4:00 PM Location: SPSC W120

The Advective Flux Transport (AFT) model is a state of the art Surface Flux Transport model, which simulates the observed near-surface flows (including an evolving convective flow velocity field) to model the transport of magnetic flux over the entire Sun. The STEREO mission provides the first opportunity to track the long-term evolution of Active Regions… Read more »

5/25/2017 – Eugene Romashets; Comparative study of a constant-alpha force-free field and its approximations in an ideal toroid.

Speaker:   Eugene Romashets (Lonestar College, Houston, TX)
Date & Time:   5/25 ,  4:00 PM Location: SPSC W120

Magnetic clouds in the solar wind are large, loop-like interplanetary flux ropes and may be locally approximated by a toroidal flux rope. We compare approximate constant-alpha force-free fields in an ideal toroid, used in magnetic cloud analysis, with the exact solution, and examine their validity for low aspect ratios, which can be found in magnetic… Read more »

6/06/2017 – Marzia Parisi, William Folkner; Juno gravity science experiment: early results

Speaker:   Marzia Parisi, William Folkner (The Jet Propulsion Laboratory, Caltech)
Date & Time:   6/06 ,  4:00 PM Location: SPSC W120

The Juno spacecraft entered orbit about Jupiter on July 5, 2016 with orbit period of 53 days. Doppler measurements of the Juno radio signal at periapsis (perijoves) are used to estimate the Jupiter gravity field in order to constrain models of the jovian interior and differential rotation. We report on the Doppler measurement accuracy and… Read more »

7/27/2017 – Adam Kellerman; Data Assimilation, Modeling, and Forecasting Ring-Current to Radiation-Belt Electrons in the Near-Earth Space Environment

Speaker:   Adam Kellerman (UCLA)
Date & Time:   07/27 ,  4:00 PM Location: SPSC W120

An ever-increasing reliance on space-borne assets by our society, has driven the need for understanding the source, and dynamics of ring-current to radiation-belt electrons in the near-Earth space environment. This presentation will detail how measurements from ground- and space-borne instruments have been used together with state-of-the-art models, and supercomputing resources, to study and forecast the… Read more »

7/31/2017 – Deniz Ölçek; Long-term Solar Variability and Intermittency in a 2X2D Babcock-Leighton Model

Speaker:   Deniz Ölçek (Université de Montréal)
Date & Time:   7/31 ,  4:00 PM Location: SPSC W120

In this talk, I will present a numerical model (Lemerle & Charbonneau, 2015) of the solar cycle based on the Babcock-Leighton mechanism of poloidal field regeneration by the surface decay of bipolar magnetic regions. The model is called 2X2D because it is based on the coupling of a surface flux transport simulation with a mean-field-like… Read more »

8/17/2017 – Jimmy Raeder; Flux Transfer Events and Kelvin-Helmholtz Waves at Earth’s Magnetopause

Speaker:   Jimmy Raeder (University of New Hampshire)
Date & Time:   08/17 ,  4:00 PM Location: SPSC W120

Flux Transfer Events (FTEs) occur as the result of transient reconnection at the magnetopause. Numerous models have been proposed to explain the formation and subsequent motion of FTEs. Here, we use OpenGGCM simulations of the magnetosphere to show that (a) FTEs form by sequential multiple X-line reconnection, i.e., as a FTE forms, a new X-line… Read more »

9/07/2017 – Kevin McGouldrick; TBD

Speaker:   Kevin McGouldrick (LASP)
Date & Time:   09/07 ,  4:00 PM Location: SPSC W120


9/21/2017 – Oleksiy Agapitov; Oblique Whistler-Mode Waves in the Earth’s Inner Magnetosphere

Speaker:   Oleksiy Agapitov (UC Berkeley)
Date & Time:   4/6 ,  4:00 PM Location: SPSC W120

At the beginning of the 21st Century, nearly a thousand satellites are operational in the Earth’s magnetosphere. And our modern societies are becoming increasingly reliant on them for providing swift and secure communications, internet, positioning, meteorological information, and defense system support. However, all such satellite assets are vulnerable to space weather and particularly to relativistic… Read more »

10/19/2017 – Xiangning Chu; TBD

Speaker:   Xiangning Chu (LASP)
Date & Time:   10/19 ,  4:00 PM Location: SPSC W120