- Weekly Seminar
- Michigan Geophysical Union (MGU) Symposium
- Alumnus of the Year Lecture
- Weekly Seminar
- The Science of Climate Change
- Earth Day: Climate Action Rally
- Interplanetary Space Weather: A New Paradigm
April 3, 2014 - 3:30 pm
Kevin Baines of JPL/Caltech and SSEC/University of Wisconsin will present: "Storms and Ices on Jupiter and Saturn: Results from Cassini, New Horizons and Galileo."
Over the past two decades, major storms on Jupiter and Saturn have been studied intensely by a number of well-instrumented orbiting and fly-by spacecraft, revealing their morphology, power, and evolution. In particular, a number of ices in the storm clouds of Jupiter and Saturn have now been spectroscopically-identified by near-infrared imaging spectrometers.
These include ammonium hydrosulfide, mixtures of ammonium hydrosulfide and ammonia, and relatively pure ammonia ices found...most strongly in localized regions of powerful upwelling, including the turbulent wake of the Great Red Spot on Jupiter and in the Great Northern Storm of 2010-2011 the largest storm yet observed on Saturn. Recent analysis of this Saturn storm finds a significant component of water ice in the cores of ammonia ice particles at the cloudtops, indicating that deeply sequestered materials such as water can be convectively lofted more than 100 km within the most colossal storms on this typically placid planet.
In contrast, such tell-tale water ice has yet be found in the tops of Jupiter’s storms. On Jupiter, laboratory simulations of the ~350-year-old Great Red Spot indicate that the reddish color of the high-altitude GRS can be attributed to photolytic products of ammonia and hydrocarbons produced in the upper levels of the GRS where solar UV light is relatively strong. This talk will detail such results pertaining to ice condensates and their byproducts, as well as discuss evidence for refractory materials – specifically carbon soot - generated by lightning near the 10-20-bar level of Saturn some 125 km below the visible clouds, which, in the “storm alleys” near 35 degrees latitude in both hemispheres, results in a near-constant drizzle of diamond rain some 7000-km below.close
Michigan Geophysical Union (MGU) Symposium
April 7, 2014 - 2:00 pm
The Michigan Geophysical Union symposium is a friendly forum for graduate and undergraduate students to present their current research in various aspects of earth, oceanic, atmospheric, and space sciences. Posters will be judged and winners will be awarded prizes by the sponsoring departments.close
Alumnus of the Year Lecture
April 10, 2014 - 3:30 pm
The AOSS Alumnus of the Year, Director of NOAA's Atmospheric Turbulence and Diffusion Division Dr. C. Bruce Baker, will present, "Meteorological measurements, Why we need them, what we do with them, and How do we use them to better understand the Earth-Atmosphere System."
Reception to follow.
Watch online by registering here: http://www.engin.umich.edu/college/about/cal/events/2014/april/meteorological-measurements-why-what-and-how
Dr. Baker has spent his career in pursuit of understanding the physics of the atmosphere through measurements. This has included laboratory studies, field experiments and long term programs that have addressed turbulence, remote sensing, and climate.
He was Chief Scientist for NOAA’s National Climatic Data Center from 2000-2009 developing and deploying a new network to monitor climate change in the U.S and Alaska called the United States Climate Reference Network.
His current interests are developing climate observing systems, understanding the impact of the carbon reservoirs in the arctic and how that will affect climate change due to the melting permafrost and validation of land surface temperatures from satellites.
His career with NOAA spans over 30 years, 18 of which were in the National Climatic Data Center. He provides leadership to ATDD as the division performs air quality and climate-related research concerning issues of national and global importance.
Title: Meteorological measurements, Why we need them, what we do with them, and How do we use them to better understand the Earth-Atmosphere System
The science and technology of weather observations have made great strides during the short history of this country.
The progress of weather observations is related directly to the rapid development of technology and a better scientific understanding of the Earth's atmosphere.
Today, weather observations contribute to observations of the entire earth system, including measurements of the atmosphere, the oceans, and the land surface. Our observing technologies are diverse, ranging from weather satellites to basic instruments such as the thermometer used by volunteers in their backyards. Improvements in weather forecasting, flood forecasting, water resources management, and our understanding of climate variability require improvements in the accuracy, spatial distribution, and frequency of weather observations. Observational networks are essential for improving forecast models, validating remote sensing products, and understanding climate change.
April 17, 2014 - 3:30 pm
Professor Justin Kasper will present, "Opening a new window on the Sun and ionosphere from the Australian outback."
The last decade has seen a dramatic resurgence in the field of low frequency radio astronomy, with massive distributed radio arrays under construction in Australia, Europe and the United States. Made possible by advances in signal processing technology, these new arrays are able to image the radio sky with unprecedented sensitivity and precision and as a result permit whole new observational approaches to understanding the universe and our local solar and terrestrial environment.
Last summer, after nearly a decade of development, we completed construction of the Murchison Widefield Array (MWA), an 80-300 MHz low frequency radio array consisting of several thousand individual antennas spread over ten square kilometers in the outback of Western Australia. MWA has now entered an early science operations period and already produced several exciting new results.
This talk will discuss some of the challenges in developing a radio array that captures and processes nearly a TB of data per second to image the sky in low frequency radio. The science goals of the array and some early results, including unprecedented views of the Sun, inner heliosphere, and ionosphere will also be presented.close
The Science of Climate Change
April 19, 2014 - 2:00 pm
Assistant Professor Gretchen Keppel-Aleks will present "The Science of Climate Change."
In the talk, Keppel-Aleks will examine the science behind the greenhouse effect and climate change. The presentation will also explore the observational and modeling tools that scientists use to understand the climate system. Finally, strategies to alleviate the human causes of climate change will be introduced.close
Earth Day: Climate Action Rally
April 22, 2014 - 5:00 pm
AOSS Professor Richard Rood is one of three speakers at this event, which will focus on the science and projected impacts of climate change.
This event will open with a presentation by Prof. Knute Nadelhoffer on the science and projected impacts of climate change. Prof. Richard Rood will then discuss the impact of a warming Arctic on the jet stream and the Arctic Oscillation, especially the role of blocking patterns in causing droughts, floods, heat waves, and cold snaps.
A third speaker will address the dangers of sociopolitical unrest posed by climate change. Finally, State Representative Jeff Irwin will address the political challenges of fighting climate change.
Interplanetary Space Weather: A New Paradigm
April 23, 2014 - 3:00 pm
Madhulika Guhathakurta of NASA Headquarters will present, "Interplanetary Space Weather: A New Paradigm."
As human activity expands into the solar system, the need for accurate space weather and space climate forecasting is expanding, too. Space probes are now orbiting or en route for flybys of Mercury, Venus, Earth and the Moon, Mars, Vesta, Ceres, Saturn, and Pluto. Agencies around the world are preparing to send robotic spacecraft into interplanetary space. Each of these missions (plus others on the drawing board) has a unique need to know when a solar storm will pass through its corner of space or how the subsequent solar cycle will behave.
Ultimately, astronauts will follow, traveling beyond Earth orbit, and their need for interplanetary space weather and climate forecasting will be even more compelling. Until recently, forecasters could scarcely predict space weather in the limited vicinity of Earth. Interplanetary forecasting was even more challenging. This began to change in 2006 with the launch of the twin STEREO probes followed almost four years later by the Solar Dynamics Observatory. These three spacecraft along with SOHO now surround the sun, monitoring active regions, flares, and coronal mass ejections around the full circumference of the star. No matter which way a solar storm travels, the STEREO-SOHO-SDO fleet can track it. Missions like SDO and Kepler are giving us a better view of sun-like stars and their inner workings to understand their cyclic behavior.
To capitalize on the science that will naturally emerge from the growth and modernization of the observational assets, researchers from many different fields will have to work together. Interplanetary space weather and climate forecasting is essentially interdisciplinary. Progress requires expertise in plasma physics, solar physics, weather forecasting, planetary atmospheres, and more. In this talk I will summarize existing observational assets, other resources, and the challenges we have to face to move this interdisciplinary field forward.close