Tag: geology

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Unveiling the Secrets of Volcanoes

in the Springerville Volcanic Field

with Marissa Mnich Ph.D. of Sonoma State University

Wednesday, September 20, 2023, Terra Linda HS Innovation Hub

Important update for those planning to attend tonight’s Marin Science Seminar! Due to construction at Terra Linda HS, the Innovation Hub can only be accessed from the courtyard inside the campus. You can park anywhere, but you need to enter via the student quad area between the new gym and the admin building. From there, access thru the doors to the 100 building. We will have signage and guides to help people find the Hub. Sorry for the inconvenience. Looking forward! 😃

Description: The Springerville Volcanic Field (SVF), located in east-central Arizona, erupted between 2.1 million and 300,000 years ago, and erupted over 500 distinct lavas. The volcanic products of the field have been mapped and sampled in great detail, which serves as the basis to unraveling the volcanic history to the field. Several similar volcanic fields pose a great risk to people and towns, but aren’t studied in real time (like monitoring at larger, active volcanoes), making the lessons learned in the SVF invaluable for understanding the nature and hazards associated with this type of volcanism.

Bio: Dr. Marissa Mnich is a professor in the geology department at Sonoma State University. Her work has focused on understanding volcanic systems in various locations on Earth, but largely focused on the Springerville Volcanic Field in Arizona.

Dr. Marissa Mnich

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Engineering Rivers and Wetlands for Climate Resiliency

Title: “Engineering Rivers and Wetlands for Climate Resiliency” with Rachel Kamman PE of Kamman Hydrology & Engineering

Date: Wed. February 5th, 2020; 7:30 – 8:30 pm at Terra Linda HS in San Rafael, Room 207

Kamman Hydrology & Engineering’s mission is to provide hydrologic, engineering and geomorphology support in the restoration, enhancement and protection of watershed, river, wetland and coastal systems. Rachel Kamman will demonstrate and discuss how this can be done to help rivers and wetlands adjust to changes brought on by climate change.

Bio: Rachel Z. Kamman PE is a consulting hydrologist whose work focuses on ecological habitat restoration. Her San Rafael based consulting practice focuses on projects that revolve around sensitive wetland, fishery, and/or riparian habitat issues and problems. Rachel specializes in the fields of hydraulic and hydrodynamic analysis and modeling, focusing on the protection and restoration of estuarine and wetland systems. Typically, Rachel Kamman works on multi-disciplined projects, collaborating closely with biologists/botanists, ecologists, planners, engineers, and/or regulatory and resource agency staff. She holds a B.S. in Civil Engineering from Lafayette College and an M. Eng., in Hydraulics, Coastal Engineering, Hydrology & Geomorphology from UC Berkeley.

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Facebook event: RSVP here

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Geoengineering and Terraforming: the manipulation of climate on Earth and other planets

Title: “Geoengineering and Terraforming: the manipulation of climate on Earth and other planets” with Warren Wiscombe Ph.D. of NASA Goddard

Date: Wed. January 29th, 2020; 7:30 – 8:30 pm at Terra Linda HS in San Rafael, Room 207

Warren Wiscombe

In 2010 ‘geoengineering’ entered the Oxford English Dictionary as ‘the modification of the global environment or the climate in order to counter or ameliorate climate change’. Geoengineering must be intentional, not accidental (as in the current global warming). And geoengineering is only a stopgap measure on the way to a renewable energy economy.

The safest and most predictable method of moderating climate change is to reduce greenhouse gas emissions. However, geoengineering may be useful to augment emission reductions. While some methods would incur gargantuan costs, notably the space-based ones, others are a relative bargain and technologically easy, notably putting aerosols into the stratosphere. While there are few technical showstoppers, geoengineering technology is nascent, and there are major uncertainties regarding its effectiveness, cost, and environmental impacts.

Terraforming, a much more radical version of geoengineering, is the technology to make an alien planet more suitable for Earth life forms. Edgar Rice Burroughs hypothesized terraforming in his book “Princess of Mars”. Kim Stanley Robinson fleshed out the idea in his trilogy “Red/Green/Blue Mars”. If humanity is to escape extinction, it will have to learn how to do terraforming. Possible methods will be noted, but the field is barely in its infancy.

Bio: Warren Wiscombe got a BS in Physics from MIT and a PhD in Applied Math from Caltech. Starting in 1971, he spent his career working on radiative transfer aspects of climate, notably the interaction of sunlight with clouds and aerosols. From 1983 till retiring in 2013, he worked at NASA Goddard Space Flight Center. His core background is in e.m. radiation spanning wavelengths from UV to radio.

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Facebook event: RSVP here

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