Past events

13
Nov
2018

Geostrophic turbulence and the formation of large scale structure - Edgar Knobloch (UC Berkeley) »

2pm 13 November 2018

Abstract:  Low Rossby number convection is studied using an asymptotically reduced system of equations valid in the limit of strong rotation. The equations describe four regimes as the Rayleigh number, Ra increases: a disordered cellular regime near threshold, a regime of weakly interacting convective Taylor...

08
Nov
2018

Ocean Fertilization by Natural and Anthropogenic Nitrogen Input in the Past and Present »

1pm 8 November 2018

The availability of “fixed” nitrogen limits the growth of marine phytoplankton in large part of the ocean. It has been suggested that considerable changes in nitrogen inventory could occur in the recent past or in the future, which may change the fertilization of the ocean and drive significant changes in...

07
Nov
2018

Evaluation of Australia as a major source of dust in the Southern Hemisphere »

12pm 7 November 2018

Prof. Patrick De Deckker will present recent work on Australian dusts. This first part of my talk will provide an overview of the surficial geology of Australia with emphasis on regions from where dust can become deflated.  This is important as previous studies ignored this aspect of the Australian regolith...

31
Oct
2018

Weathering effects on seawater chemistry during the Neogene: evidence from foraminiferal Na/Ca and carbonate mass accumulation rates »

12pm 31 October 2018

Yair Rosenthal (Dept. of Marine and Coastal Sciences, Rutgers) will be speaking about his work on the weathering effects on seawater chemistry during the Neogene using evidence from foraminiferal Na/Ca and carbonate mass accumulation rates.

25
Oct
2018

Geologic History Of The Wyoming Province, One of the Oldest Fragments of Crust in the World »

1pm 25 October 2018

The Wyoming province consists of Precambrian rocks that are exposed in the Laramide uplifts in the Rocky Mountains of Wyoming.  The province records a long history with rocks dating back to 3.4 billion years ago (Ga) and xenocrystic zircon grains dating to ca. 3.9 Ga.  Lu/Hf ratios on some of the xenocrystic...

23
Oct
2018

2018 RSES PhD field trip to the Northern Territory, Australia »

4pm 23 October 2018

This September, 17 research students from the Research School of Earth Sciences (RSES) had the incredible opportunity to explore the geology and cultural history of the Northern Territory. We spent two weeks driving through northern and central Australia, travelling over 4000 km in total! This trip provided an...

17
Oct
2018

The Frontiers of Microbialite Research »

12pm 17 October 2018

It is 110 years since Kalkowsky published his definitive paper on the association of stromatolites and oolites in the Buntsandstein surrounding the Hartz Mountains of Germany.  While Malcolm Walter considered that by 1976 this work was “of historical interest only”, our introduction (with Dr L Moore) of the term “...

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