Category Archives: UMD

University of Maryland geology department

Marcia McNutt at UMD

2015 Geology Colloquium Series – Geology Dept., University of Maryland, College Park

Friday, March 6th 2015 at 3:00 pm
in PLS 1140

Marcia McNutt
American Association for the Advancement of Science

Geoscience Problem Solving for Sustainability: Focus on Climate and Energy

Geoscientists are and will continue to be at the forefront of finding solutions to many of the world¹s most pressing challenges for how to find solutions to many of problems in maintaining and enhancing the quality of life for the billions of people on Earth in a sustainable manner. At the center of this challenge is the energy-climate change nexus: how to provide abundant energy to power modern society without continuing to contribute to the risk of climate change. Geoscientists are solving these problems by helping to find energy sources with lower CO2 emissions, providing the science for climate change adaptation, and exploring the prospects for climate intervention. Hand-in-hand with these issues, geoscientists need to be cognizant of the continuing need for abundant critical materials and water for alternative energy technologies and energy production.

UMD Geology: “Can Flat Slabs Really Do That?” (Wagner, Carnegie)

2015 Geology Colloquium Series

Friday, January 30th 2015 at 3:00 pm
in PLS 1130, University of Maryland, College Park

Lara Wagner
CIW – Department of Terrestrial Magnetism

Can Flat Slabs Really Do That? New Constraints from New Data

UMD Geology: Noe on floodplains

There will be a University of Maryland Geology departmental colloquium this week on Friday at 3:00pm in room PLS 1140 (Plant Science building).

The speaker will be Dr. Greg Noe (http://profile.usgs.gov/gnoe) from USGS.  He will present: “”The role of floodplains in mediating sediment and nutrient transport and biogeochemistry: implications for watershed restoration and of climate change.”

The department will host a reception in the Geology Lounge immediately following the seminar.  We hope to see you all there!

UMD: Lampkin on fueling the flow of Jakobshavn

There will be a departmental colloquium this week on Friday at 3:00pm in room PLS 1140 (Plant Science building).

The speaker will be Dr. Derrick Lampkin (http://www.atmos.umd.edu/~gcm/gtk/derrick-lampkin/) from University of Maryland.  He will present: “Fuel Injecting an Ice Stream: Drainage from Water-Filled Crevasses within the Shear Margins of Jakobshavn Isbræ, Greenland.”

The department will host a reception in the Geology Lounge immediately following the seminar.  We hope to see you all there!

UMD Geology: Kattenhorn on moons

There will be a University of Maryland geology departmental colloquium this week on Friday at 3:00pm in room PLS 1140 (Plant Science building).

The speaker will be Dr. Simon Kattenhorn from the University of Idaho . He will present: Marvelous Moons: Geologically Active Worlds of the Outer Solar System

The department will host a reception in the Geology Lounge immediately following the seminar.  I hope to see you all there.

UMD: petrologic constraints on rates of orogenic processes

There will be a University of Maryland Geology departmental colloquium this week on Friday at 3:00pm in room PLS 1140 (Plant Science building).

The speaker will be Dr. Mark Caddick from Virginia Tech. He will present: Depths, temperatures & durations: petrologic constraints on rates of orogenic processes

The department will host a reception in the Geology Lounge immediately following the seminar.

UMD climate: post Snowball Earth hothouse

The atmospheric chemistry brown bag talk series at the University of Maryland, College Park, continues this Friday February 8 at 12:00 PM when Professor Yongyu Hu of Peking University will give a talk entitled:

Hothouse and Dry Climate during the Snowball Earth Aftermath

ABSTRACT:

Carbonates capping Neoproterozoic glacial deposits suggest that the
Snowball Earth was melted by extremely high levels of CO2.
Such high levels of CO2 in the atmosphere could be accumulated due to
volcanic eruptions over time scales of millions of years when weathering
reactions were ceased because of the complete coverage of snow and ice.
Previous simulations have showed that higher than 0.2 bars of CO2 is
required to melt the hard Snowball Earth. It suggests that there must be
supergreenhouse effect during the aftermath of the hard Snowball Earth,
considering high-level CO2 and large amount of water vapor in the atmosphere.

To test how high surface temperature could be, we performed GCM
simulations with various levels of CO2. It is found that global-mean
surface air temperatures is about 60?C for 0.2 bars of CO2, and the
highest surface temperature over continents can be as high as 80?C.
Associated with the hothouse climate, water evaporation cools the
ocean surface and causes strong boundary inversion, which suppresses
convection and thus precipitation, and leads to extremely dry climate
(atmospheric relative humidity can be as low as 20%).
Atmospheric circulations under such the hothouse climate conditions are very
different from that of the present-day. How life in the Neoproterozoic era
survived from the hothouse climate (not only extremely cold climate in the
Snowball Earth episodes) remains an intriguing but unanswered question.

Note: Talks are informal and usually 40-50 minutes in length.

When: 12:00 PM Friday unless noted above Where: Department’s
library (3400 Computer and Space Science Building)
Parking is available in the (Football) Stadium Garage. Please park in
a numbered spot and pay at the parking machine located near the garage’s
entrance.