Coupled chemistry-climate models are being increasingly used to tackle the problem of understanding the mechanisms for driving changes in past, present and future atmospheric composition. Given the computational overheads of running these types of models the chemical mechanisms which are used are often chosen for their speed of simulation.
The most pressing needs in understand climate change are now on the regional and local scale. Although it is well known that global temperatures will increase in the next century, what is more poorly known is how these changes will affect populations on the local scale. Consequently there is a pressing need to bring the predictions of climate models down to scales amenable to policy makers on this level.
Seminar Series: Tracing terrestrial biosphere-atmosphere exchange of CO2 and H2O using stable isotopes
Tracing terrestrial biosphere-atmosphere exchange of CO2 and H2O using stable isotopes
Dr. Lisa R. Welp
Scripps Institution of Oceanography, UC San Diego
Seminar: Eddy-driven sediment transport in the Argentine Basin: a tale of an anticyclone and a seamount
The Argentine Basin in the southwest South Atlantic Ocean is a fascinating ocean basin. In this seminar I will give an overview of the many intriguing aspects of the oceanography and sedimentology of this basin. This overview will introduce a problem that has baffled scientists since the early 60’s, namely the existence of the Zapiola Rise, a sedimentary deposit in the center of the basin that is believed to be the largest offshore body of sediment in the World Ocean.
The global average latitude where tropical cyclones achieve their lifetime-maximum intensity has been migrating poleward at the rate of about a degree of latitude per decade over the last 30 years (Kossin et al. 2014), which is consistent with the observed expansion of the tropics. This result raises important questions:
- What changes in the environmental conditions could drive the migration of the lifetime-maximum intensity of tropical cyclones?