← December 2016 February 2017 →
Mon Tue Wed Thu Fri Sat Sun
      
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
12:00 pm - UTIG Brown Bag Talk: Liviu Giosan

UTIG Brown Bag Talk: Liviu Giosan

  Start: January 17, 2017 at 12:00 pm     End: January 17, 2017 at 1:00 pm
 Location:PRC ROC Room 1.603
 Contact:Eric Petersen, eric_petersen@utexas.edu
Weekly informal presentations by UTIG students, researchers. Bring your lunch!

(Usually on Wednesday - this one's special.)

18
12:00 pm - UTIG Brown Bag Talk: Henning Åkesson

UTIG Brown Bag Talk: Henning Åkesson

  Start: January 18, 2017 at 12:00 pm     End: January 18, 2017 at 1:00 pm
 Location:PRC ROC Room 1.603
 Contact:Eric Petersen, eric_petersen@utexas.edu
Informal weekly presentations by UTIG students, researchers. Bring your lunch!

19
20
10:30 am - UTIG Seminar Series; Andre Gutscher, CNRS, University of Brest, France

UTIG Seminar Series; Andre Gutscher, CNRS, University of Brest, France

  Start: January 20, 2017 at 10:30 am     End: January 20, 2017 at 11:30 am
 Location:PRC ROC Room 1.603
 Contact:Anisa Abdlkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Geodynamics of the Calabrian subduction: Evidence from new seismic and bathymetric surveys

Abstract: Results from recent marine geophysical surveys in the forearc of the Calabrian subduction zone and adjacent Eastern Sicily margin will be presented. These data include: a new compilation of multi-beam bathymetry, high-resolution seismic profiles and wide-angle seismic profiles. Several distinct morpho-tectonic provinces are imaged by the bathymetric mapping including: the deeply incised Malta-Hyblean Escarpment, numerous submarine canyons, broad regions of relatively flat seafloor dominated by fields of sediment waves, the gently undulating anticlinal fold-and-thrust belts of the external Calabrian accretionary wedge and the adjacent portion of the Western Mediterranean Ridge. The Calabrian arc can be divided into 4 domains (from SE to NW): 1) the undeformed Ionian abyssal plain, 2) the external evaporitic wedge, 3) the internal clastic wedge, 4) the Calabrian backstop (Variscan crystalline basement). The Calabrian accretionary wedge can also be divided laterally into two major lobes, the NE- and the SW lobes, and two minor lobes. The kinematics of the limit between the two major lobes is investigated and shown to be sinistral in the external (evaporitic) wedge. A network of radial slip lines within the southernmost external wedge unequivocally demonstrate ongoing dextral displacement of a rigid indenter (representing the corner of the clastic wedge) into the evaporitic wedge thereby confirming the geodynamic model of an active lateral slab tear fault here off eastern Sicily. The slab tear produces a series of major sub-parallel dextral strike-slip faults offshore Mt. Etna and south of the Straits of Messina consistent with the relative motions between Calabria and the Peloritan domain (NE Sicily). Abundant strike-slip faulting, and wide-spread folding and thrusting observed throughout the entire accretionary wedge, indicate regional shortening between the Ionian abyssal plain (foreland) and the Calabrian - Peloritan backstop caused by active subduction. Wide-angle seismic data acquired the by the R/V Meteor in 2014 and recorded by 32 French (Ifremer) and 30 German (Geomar, Kiel) ocean-bottom seismometers and hydrophones (OBS, OBH) as well as 6 landstations (INGV Rome) image the deep crustal structure.

21
22
23
24
25
12:00 pm - UTIG Brown Bag Talk: Taan Fjord & Icy Bay Team

UTIG Brown Bag Talk: Taan Fjord & Icy Bay Team

  Start: January 25, 2017 at 12:00 pm     End: January 25, 2017 at 1:00 pm
 Location:PRC ROC Room 1.603
 Contact:Eric Petersen, eric_petersen@utexas.edu
Informal weekly presentations by UTIG students, researchers. Bring your lunch!

12:00 pm - iPGST: Dr. Leif Karlstrom - Waves in volcanic conduits

iPGST: Dr. Leif Karlstrom - Waves in volcanic conduits

  Start: January 25, 2017 at 12:00 pm     End: January 25, 2017 at 1:00 am
 Location:JGB 3.222
Dr. Leif Karlstrom (University of Oregon) - Waves in volcanic conduits

26
4:00 pm - De Ford Lecture Series: Leif Karlstrom

De Ford Lecture Series: Leif Karlstrom

  Start: January 26, 2017 at 4:00 pm     End: January 26, 2017 at 5:00 pm
 Location:JGB2.324

27
10:30 am - UTIG Seminar Series, Adam Sobel, Columbia University

UTIG Seminar Series, Adam Sobel, Columbia University

  Start: January 27, 2017 at 10:30 am     End: January 27, 2017 at 11:30 am
 Location:PRC ROC Room 1.603
 Contact:Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Understanding deep convection by parameterizing large-scale dynamics

Abstract:
Tight coupling between deep convection and larger-scale circulations in the atmosphere makes it difficult to understand the causal factors which control variations in precipitation on a range of space and time scales. One approach to untangling these factors involves simulating the convection in a small domain and parameterizing the large scale circulations which connect that domain to the rest of the atmosphere. The weak temperature gradient approximation is one such large-scale parameterization, based on well-understood aspects of geophysical fluid dynamics near the equator and thus appropriate for the study of tropical convection. I will review application of the weak temperature gradient approach to a range of specific observed phenomena in the tropics, including El Nino, the Madden-Julian oscillation, and tropical cyclones. I will then present a new large-scale parameterization appropriate outside the deep tropics, using the quasi-geostrophic omega equation. A motivation for this latter work is to understand the dynamics behind extreme precipitation events in the subtropics and midlatitudes, and I will show results from its application to the events leading to the 2010 floods in Pakistan.

28
29
30
31
     
Legend
 JSG  BEG  UTIG