Category Archives: UMD

University of Maryland geology department

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.

UMD: Moore on uplift, weathering, and CO2 in New Zealand

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

The speaker will be Dr. Joel Moore from Towson University. He will present: Tracking linkages between tectonic uplift, chemical weathering, and atmospheric CO2 consumption with Ca isotopes: Southern Alps, New Zealand

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

UMD: geodetic imaging of North America

The first University of Maryland Geology Departmental colloquium of the semester will take place this week on Friday at 3:00pm in room PLS 1140 (Plant Science building). Please note the new room!

The speaker will be Dr. Matt Pritchard, from Cornell University. His visit is sponsored by Earthscope.  He will present: Towards a pixel-by-pixel view of North America’s changing surface using geodetic imaging

The department will host a reception in the Geology Museum (GEO 2118) immediately following the seminar.