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OSU Paleoclimate Alumna Summer Praetorius and CEOAS Professor Alan Mix publish in Science

Synchronization of North Pacific and Greenland climates preceded abrupt deglacial warming

Science 25 July 2014: 
Vol. 345 no. 6195 pp. 444-448 
DOI: 10.1126/science.1252000

Some proposed mechanisms for transmission of major climate change events between the North Pacific and North Atlantic predict opposing patterns of variations; others suggest synchronization. Resolving this conflict has implications for regulation of poleward heat transport and global climate change. New multidecadal-resolution foraminiferal oxygen isotope records from the Gulf of Alaska (GOA) reveal sudden shifts between intervals of synchroneity and asynchroneity with the North Greenland Ice Core Project (NGRIP) δ18O record over the past 18,000 years. Synchronization of these regions occurred 15,500 to 11,000 years ago, just prior to and throughout the most abrupt climate transitions of the last 20,000 years, suggesting that dynamic coupling of North Pacific and North Atlantic climates may lead to critical transitions in Earth’s climate system.


OSU Alumnus Logan Mitchell, Professor Ed Brook, Post-Doc Christo Buizert, and CEOAS Ph.D. student James Lee published in Science: http://www.sciencemag.org/content/342/6161/964.full

Constraints on the Late Holocene Anthropogenic Contribution to the Atmospheric Methane Budget

"The origin of the late preindustrial Holocene (LPIH) increase in atmospheric methane concentrations has been much debated. Hypotheses invoking changes in solely anthropogenic sources or solely natural sources have been proposed to explain the increase in concentrations. Here two high-resolution, high-precision ice core methane concentration records from Greenland and Antarctica are presented and are used to construct a high-resolution record of the methane inter-polar difference (IPD). The IPD record constrains the latitudinal distribution of emissions and shows that LPIH emissions increased primarily in the tropics, with secondary increases in the subtropical Northern Hemisphere. Anthropogenic and natural sources have different latitudinal characteristics, which are exploited to demonstrate that both anthropogenic and natural sources are needed to explain LPIH changes in methane concentration."

12/4-12/6/2013 - PMIP Ocean Workshop 2013 - "Understanding Changes since the Last Glacial Maximum"

Oregon State University CEOAS is hosting the 2013 Paleoclimate Modeling Intercomparison Project Ocean Workshop Dec. 4th-6th in Corvallis, OR.

The Paleoclimate Model Intercomparison Project in its third phase (PMIP3) includes simulations with comprehensive climate models of the Last Glacial Maximum (LGM), the Mid-Holocene, and the last Millennium. PMIP3 results, some of which are part of the Coupled Model Intercomparison Project 5 (CMIP5), are becoming available for analysis now. An important task will be to evaluate the ocean simulations including circulation patterns and strengths. Here we want to facilitate this evaluation by updating existing datasets of surface and deep temperatures, carbon isotopes ( and ), as well as other relevant proxies (e.g. Pa/Th, Nd) including revisions of the chronologies and proxy uncertainties. Another goal of the workshop will be to bring together sea-going paleoceanographers, modelers, and statisticians in an effort to collaboratively improve our understanding of ocean changes since the LGM.



4/17/2012 - CRES Sea Level Rise and the Ice Sheets Ph.D. course and workshop 5/21-5/25/2012

The Center for Ice and Climate (CIC) at the University of Copenhagen, Denmark, is hosting a course and workshop geared toward Ph.D. students and Post-Docs working with ice sheets and sea level.

Themes to be discussed: detecting regional sea level changes, the role of satellites in sea level changes and ice sheet monitoring, understanding the components of sea level change, past sea level changes, predictions of future sea level changes, mass changes of the ice sheets, surface melt and ice discharge, the role of the ocean in ice discharge, past mass changes of the ice sheets. 

This workshop is limited to 40 participants. To register, email Dorthe Dahl-Jensen at ddj@gfy.ku.dk as soon as possible! Deadline 5/1/2012.

See program announcement HERE


3/13/2012 - SCAR (Scientific Committee on Antarctic Research) 2012 Meeting, Portland, OR -

The 2012 SCAR Meeting will take place at Portland State University 16-19 July. This is a great opportunity for students to gain experience in conference planning and organization, while also providing a unique chance to interact with Antarctic researchers from all over the world. If a student is interested in volunteering to help with the meeting, contact John Kirkland, SCAR Program Manager. It would be great to see OSU paleoclimate students involved with this conference!

John A. Kirkland
Executive Program Manager
XXXII SCAR and Open Science Conference

EMAIL: scar2012@pdx.edu

3/01/2012 - 9th Urbino Summer School in Paleoclimatology (USSP; 11-31 July 2012) - Urbino, Italia

The 9th USSP will focus on past climate dynamics with special emphasis on the analysis of the long-term carbon cycling and its implications for the understanding of present and future climates. USSP 2012 will integrate lectures, symposia, fieldtrips, and exercises on the many different areas of paleoclimatology, including biogeochemical cycling, paleoceanography, continental systems, and all aspects of deep-time climate modeling. These techniques and systems will be explored through interactive discussions of Cretaceous OAEs, P/E hyperthermals, the Greenhouse-Icehouse transition, and Neogene through Quaternary climate dynamics. The goal of USSP is to provide participants with an advanced working knowledge on paleobiological and geochemical proxy data and their use in reconstructing and modeling of past climates.

The 2012 USSP will be lead by ~35 leading senior scientists from around the world, and we will be able to accommodate ~60 students (end-MSc or early career Graduate and post Graduate) based on their submitted CVs.

Find more information (including a prompt for applications) on this program HERE

2/07/2012: Post-Doctoral Research Position through GRENE Arctic Climate Change Research Project. Postdoctoral positions are available at National Institute of Polar Research (NIPR) for the GRENE Arctic Climate Change Research Project (See Job Announcement). As part of the GRENE Arctic Climate Change Research Project, we will investigate temporal and spatial variability of aerosols, their transport processes and impacts on climate. Among various aerosols, we will focus on black carbon, dust and sulfate, which are thought to influence radiative forcing. For better understanding of the mechanisms of Arctic amplification, we will reconstruct variability of temperature,precipitation rate and these aerosols during the past 100 years using ice cores. 

Application Attachment 1
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Applications due: February 17, 2012 Additional details for interested applicants, contact: Kumiko Goto-Azuma Associate professor National Institute of Polar Research, Tokyo, Japan E-mail: kumiko@nipr.ac.jp

2/01/2012: Niels Bohr Institute and INTIMATE Summer School on: Climate Transitions

The summer school is intended for Ph.D. students and Post Docs in the broad area of climate theory, modeling and reconstruction. The summer school will have the format of a workshop with plenty of time for working on assigned problems, interactions between participants and lecturers. When: June 9-16, 2012 Where: Borno Research Station, Gullmarfjorden, Sweden Applications Due 4/1/2012 Additional details for interested applicants here (.pdf)


1/31/2012: Quat Tea and Paleobeer set to resume 2/10/2012 at 2:30 PM in Wilkinson 207. Go to Seminars/Lectures for further details!


12/2/2011: OSU Paleoclimate @ AGU Fall 2011 Meeting Posted 12/14/11 Researchers from the OSU Paleoclimate group presented several posters and talks below at the AGU Fall Meeting in San Francisco, CA. Click here to access the official meeting website.

Robert Hatfield--Wednesday Dec 7th 1:40 PM – 6:00 PM; Halls A-C PP33A. Cenozoic History and Climate of the Arctic Ocean I Posters PP33A-1911. Fingerprints of Greenlandic and Icelandic Sediment Sources to the North Atlantic through Five Glacial Terminations and Interglacials Robert G. Hatfield; Joseph S. Stoner; Anders E. Carlson; Alberto Reyes

Andreas Schmittner – Wednesday, Dec. 7 2:10 PM – 2:25 PM Room 3001 GC33E. Using Paleo and Modern Observations to Improve Understanding of Climate Projections, Environmental Change, and Biomass Burning I GC33E-03. Climate sensitivity estimated from temperature reconstructions of the Last Glacial Maximum Andreas Schmittner; Nathan Urban; Jeremy D. Shakun; Natalie M. Mahowald; Peter U. Clark; Patrick J. Bartlein; Alan C. Mix; Antoni Rosell-Melé Alan Mix – Thursday, December 8, 2011; 12:05 PM to 12:20 PM (talk) PP42A. Bering Sea and Beringia Climatic and Oceanic Change of the Past and Present II Room 2005 (Moscone West) PP42A-08 Bering Sea Porewaters and Late Glacial Ocean Circulation. Authors — Alan Mix, Jennifer McKay, Andy Ross, Akira Ijiri, Yusuke Okazaki Julia Rosen – Friday Dec. 9th 1:40 PM – 3:40 PM Room 2003 PP53A. Reconstruction and Modeling of Global Climate Evolution of the Last 21,000 Years II New insights on the phasing of atmospheric methane and temperature change during the Last Glacial Termination from the North Greenland Eemian (NEEM) Ice Core. Julia L. Rosen; Edward Brook; Jeffrey P. Severinghaus; Logan Mitchell; Thomas Blunier; Christopher Stowasser. Sarah Strano - Friday Dec. 9th 8:00 AM – 12:20 PM Halls A-C GP51B-Paleogeomagnetic Change Studies, Including Lake Sediments II Posters A time-varying model of pDRM processes based on deep-sea Holocene and deglacial sedimentary paleomagnetic records Authors: Sarah E. Strano, Joseph S. Stoner and Chuang Xuan  New article on upcoming UN Climate negotiations Posted on November 16, 2011 The most recent Nature highlights an article commenting on the upcoming UN climate change negotiations to take place in South Africa, and whether our ever-evolving world governments can reach an agreement that is “better” than the Kyoto Protocol. Climate policy: Letting Go of Kyoto


A new article about the articulation of climate science Posted on October 24, 2011 A well-written article in Physics Today about the increasing knowledge gap between scientists and the public – something we can all relate to and hopefully fix!  Communicating the science of climate change

Muller study finds warming (like everyone else who has looked carefully) Posted on October 21, 2011 Global warming 'confirmed' by independent study