Winter 2019

Winter 2019 Seminars

A-340  Earth & Marine Sciences Building
Fridays, 10:40 a.m. - 11:45 p.m. (unless otherwise noted*)

Seminar Coordinator: Claudie Beaulieu 

For disability-related accommodations: call (831) 459-4730 or email Rondi Robison

 


    January 11

  • Katerina Giamalaki, University of Southampton

    Occurrence and recurrence of extreme atmospheric events and their effects on Ocean Conditions in the North Pacific

     Abstract: This talk will explore the linkages of extremely low sea level pressure events and their anomalous net heat flux responses in the North Pacific. The occurrence of such events had important ecosystem-wide impacts in the past. The links are identified in both observational data and historical runs of a large ensemble of the Community Earth System Model. Future evolution is described using business-as-usual runs from the same model, showing increasing recurrence of extreme events patterns in that region. 

     

     


  • January 18

  • Patrick Rafter, UC Irvine

    Evidence for the influence of seafloor volcanism on local seawater carbon chemistry after the last ice age

    Abstract:  Seafloor volcanism at ocean spreading centers has been argued to play a role in late-Pleistocene glacial terminations by increasing the global inventory of the greenhouse gas carbon dioxide (CO2). Here, I exploit the mean circulation of the Gulf of California—in at depth, out at the surface—to construct a carbon budget of the Gulf since the last ice age. The results are consistent with the addition of 14C-depleted carbon to Gulf waters, potentially from local seafloor volcanism. In this talk I will explore the implications of these results on our understanding of seafloor volcanism and Gulf seawater carbon chemistry since the last ice age.


  • January 25

  • Zeke Hausfather, UC Berkeley

    Understanding and reconciling estimates of sea surface temperature change

    Abstract:  Reconstructing past global surface temperatures is complicated by changes in instrumentation, measurement practices, spatial coverage, and other factors. This has led to a number of divergent estimates of the warming of sea surface temperatures over the 20th and early 21st century, with particularly large differences around the WW2 era and over the past decade. This talk will assess different observational records, and look at independent ways to try and determine which are most accurately capturing changes in the sea surface temperatures and global surface temperatures more broadly over the past century.


  • February 1

  • TBA

  • February 8

  • Daniele Bianchi, UC Los Angeles

    An Earth-System perspective on the future of the global marine fishery

    Abstract:  The global wild marine fish harvest increased fourfold between 1950 and its current peak, reflecting interactions between human and ecological drivers. This talk will examine these interactions in an Earth System perspective, using a coupled fishery-economics model.  A combination of hindcast simulations and future scenarios will highlight the major role of economic drivers, with climate change increasingly important under effective management.


  • February 15

  • TBD


  • February 22

  • Larry Crowder, Stanford University

    Beyond Ocean Science: Problem Solving in the 21st Century

    Abstract:   Many of today's students and post-docs have a profound interest in science, but they also recognize the rapidly expanding challenges to ocean ecosystems. They want to be part of the solution, rather than simply describing the daunting problems. In this talk, I'll share some thoughts on the transition from problem description to problem solving--from disciplinary to interdisciplinary to transdisciplinary approaches.  I will present some case studies on designing pathways to solutions that require diverse approaches to effective solutions. 


  • March 1

  • Andrew Barton, Scripps Institute of Oceanography, UC San Diego

    The costs and benefits of diatom colony formation

     Abstract:

    Abstract: Many marine microbes, including diatoms, form colonies of cells, yet the costs and benefits of this behavior are not well understood. Here we present three years of observations from Scripps Pier, a coastal location in the Southern California Bight, showing how the abundances of single-celled and colony-forming diatoms vary through time, and discuss how these dynamics may be linked to environmental conditions, including nutrients and temperature. We use a trait-based model to interpret these observations, and hypothesize that the benefits of forming colonies outweigh the costs in the presence of abundant zooplankton predators and high resource concentrations.


  • March 8

  • OS Open House

     

     


  • March 15

  • Anna Lowe, PhD Candidate Ocean Sciences & Jesse Bausell, PhD Candidate Ocean Sciences

    Anna Lowe: A model investigation of the influence of submesoscale frontal dynamics on connectivity of nearshore rockfish populations around the Monterey Peninsula

    Jesse Bausell: Comparison of two in-water optical profilers in a dynamic, optically complex coastal marine ecosystem