NOTE: All lectures will be in Room U113 in the Minerals and Materials Engineering Building (M&M) at Michigan Tech.
Scroll down to access recordings of events earlier this Fall.
Previously Recorded Events
Recording Passcode: 9&21%p=U
"Understanding the impact of two important reactive nitrogen species on air quality"
Reactive nitrogen species can contribute to poor air quality, either directly, or
as precursors to other pollutants, such as particulate matter and ozone. One reactive
nitrogen species of particular importance is nitrous acid (HONO). HONO in the atmosphere
can form Hydroxyl radicals (OH). As such, HONO can have a large influence on the oxidation
capacity of the atmosphere. However, not all sources of HONO are fully understood
and it can be a challenging species to measure. Here I will discuss some recent research
on primary and secondary sources of HONO and their impact on the atmosphere.
This talk will also include a discussion of another important nitrogen species - nitrogen dioxide (NO2). The main source of NO2 is from the burning of fossil fuels, for example, road transport and power stations. When the Covid-19 pandemic started many countries introduced lockdowns to control the spread of the virus. This led to a decrease in vehicles on the road and a reduction in NO2 concentrations in many places. We will take a look at the impact of these lockdowns on air quality and consider what the main sources of air pollution may be in the future with fewer combustion engines and more electric cars on the road.
The Richard E. Honrath Memorial Lecture is a Joint EPSSI/Environmental Engineering Graduate Seminar honoring the memory of Richard E. Honrath Jr., who was a faculty member in the Civil, Environmental, and Geospatial Engineering and Geological and Mining Engineering and Sciences Departments. Professor Honrath was a co-founder of Michigan Tech's Atmospheric Sciences Doctoral Degree Program. He died tragically in a kayaking accident in April 2009.
Recording Passcode: 2!X@5y!s
"Let it slide: characterization of slip behavior for volcanic landslides"
Massive collapse of volcanic flanks is among the largest mass-wasting events on the planet and can evolve into energetic lateral blasts and spawn dangerous and destructive tsunami waves in island settings. Despite this hazard, the processes leading or aggravating the risk of flank collapse remain poorly understood. All volcanoes behave differently and the reasons behind initiation and persistence or arrest of flank collapse need to be explored and modeled accurately for a wide range of volcanoes affected by distinct flank processes. Here, we explore slip behavior and possible triggers of volcanic flank motion at two ocean island volcanoes: Kīlauea (HI) and Anak Krakatau (Indonesia), as well as at Pacaya Volcano (Guatemala), using a combination of satellite geodesy and modeling.
Recording Passcode: .V2Tdw!k
"Impacts of Irrigation, Agriculture, and Urbanization on Regional Climate and Air Quality"
Agricultural irrigation and urbanization are two different types of land uses. As global warming continues, while irrigation is expected to play an increasingly important role in crop production in the U.S. and many parts of the world, urbanization is likely to slow down and/or grow with more green space and less emissions to mitigate the effects of urban heat and air pollution. In this talk, I will present the progress that my team (in collaboration with others) has made in quantifying and understanding the impacts of irrigation and urbanization on regional climate and air quality in China and U.S. I will show the challenges of resolving and predicting neighborhood vulnerability to urban heat and air pollution, as well as the critical importance of the crop land emissions in regional air quality management. I will conclude that smart irrigation has compelling benefits for agriculture and urbanization, and recommend the smart-and-connected community science engagement (enabled in part by the new technology and low-cost sensors) as a key pathway to achieve smart irrigation.