News and Events
A new paper authored by AOS Postdoctoral Research Associate Dawei Li, Rong Zhang, an AOS faculty member, and GFDL Meteorologist Tom Knutson on winter Arctic sea ice decline has been recently published in Nature Communications.
GFDL Hurricane Science Symposium - May 2, 2017
On Tuesday, May 2, 2017, GFDL will be hosting a half-day symposium that will highlight the work of the GFDL regional hurricane modeling group over the past 45 years, discuss the current state of the science, and provide insights into future directions for hurricane modeling. Details, agenda, and registration information are available on the Symposium website.
Scientists know from observatories such as NASA's Kepler space telescope that two-star systems can support planets, but planets thus far discovered in double-star systems are large and gaseous. So the question remained: If an Earth-size terrestrial planet were orbiting two suns, could it support life? "Double-star systems of the type studied here are excellent candidates to host habitable planets, despite the large variations in the amount of starlight hypothetical planets in such a system would receive," said first author Max Popp, an AOS associate research scholar. The paper, "Climate variations on Earth-like circumbinary planets," was published April 6 in Nature Communications.
Save the Date! AOS Program Climate Engineering Workshop
Join AOS graduate students and postdocs from Monday, August 28 through Wednesday August 30 at GFDL for "Climate Engineering" -- the fifth annual AOS Program Workshop. Invited speakers include: Simone Tilmes (NCAR), Peter Irvine (Harvard University), and David Koweek (Stanford University). Details will follow.
AOS Program Biogeochemistry Seminar Series -- Friday, March 31st at 2pm -- Carolina Dufour (AOS) "Air-sea CO2 fluxes from models and SOCCOM float based estimates in the Southern Ocean: preliminary results" Sayre Hall Conference Room
In a new study, led by AOS Postdoctoral Research Associate Mitch Bushuk, the evolution of Arctic sea ice volume anomalies is studied using a 700-yr control integration and a suite of initialized ensemble forecasts from a fully coupled global climate model. This analysis is focused on the September sea ice zone, as this is the region where thickness anomalies have the potential to impact the summer sea ice extent (SIE) minimum. The study, published online recently in the Journal of Climate, highlights the crucial importance of accurate sea ice thickness (SIT) initialization and representation of ice–albedo feedback processes in seasonal forecast systems. Coauthors include Rym Msadek (CNRS-CERFACS), Mike Winton (GFDL), Gabe Vecchi, professor of Geosciences and PEI who worked on the research while at GFDL, and Rich Gudgel, Anthony Rosati and Xiaosong Yang (GFDL).
Influence of High-Latitude Atmospheric Circulation Changes on Summertime Arctic Sea Ice
AOS Associate Research Scholar Nathaniel Johnson is the coauthor of a paper published which reports that natural variability could account for as much as half (30-50%) of the overall decline of September Arctic sea ice area since 1979. The study, published today in Nature Climate Change, shows that changes in atmospheric circulation, which are primarily related to natural internal variability, influence the extent of Arctic summer sea ice.
The Independent article
AOS Program Biogeochemistry Seminar Series -- Friday, March 17th at 2pm -- Lionel Arteaga (AOS) "Annual and seasonal estimates of total and particulate organic carbon production inferred from combined oxygen and bio-optical float measurements in the Southern Ocean" Sayre Hall Conference Room
Rapid Emergence of Climate Change in Environmental Drivers of Marine Ecosystems
Climate-change driven stress to marine ecosystems could extend to over four-fifths of the world’s oceans by 2050 if no mitigating actions are taken, according to research published in Nature Communications. However, measures to slow the pace of climate change could extend stress-free conditions by 20 years, the study suggests, giving marine ecosystems more time to adapt to climate change. The study, published March 7th, is led by former AOS Associate Research Scholar Stephanie Henson (University of Southampton). Former AOS Associate Research Scholar Claudie Beaulieu (University of Southampton), Jasmin John (GFDL) and Jorge Sarmiento (GEO/AOS) are among the study's coauthors.
Washington Post article Reuters
AOS Program Biogeochemistry Seminar Series -- Friday, March 10th at 2pm -- Seth Bushinsky (AOS) "Oxygen in the Southern Ocean from Argo floats: Processes driving air-sea fluxes and seasonal cycles" Sayre Hall Conference Room
Asian Pollution, Heat Waves Worsen U.S. Smog
The influx of pollution from Asia in the western United States and more frequent heat waves in the eastern U.S. are responsible for the persistence of smog in these regions over the past quarter century, despite laws curtailing the emission of smog-forming chemicals from cars and factories. A new study, led by AOS Research Scholar Meiyun Lin, highlights the importance of maintaining domestic emission controls on cars, power plants and other industries at a time when pollution is increasingly global. The paper was published March 1st in the journal Atmospheric Chemistry and Physics. Larry Horowitz (GFDL) is among the study's coauthors.
Managing Living Marine Resources in a Dynamic Environment: The Role of Seasonal to Decadal Climate Forecasts
A new study led by AOS Research Scholar Desiree Tommasi provides an overview of climate prediction systems and advances in seasonal to decadal prediction of marine-resource relevant environmental variables. The authors describe a range of climate-sensitive LMR decisions that can be taken at lead-times of months to decades, before highlighting a range of pioneering case studies using climate predictions to inform LMR decisions. The study, published in Progress in Oceanography, has among its coauthors GFDL/AOS affiliated (and former affiliated) scientists : Charlie Stock, Gabe Vecchi, Rym Msadek, Tom Delworth, Barbara Muhling, Rebecca Asch, Malin Pinsky, Vince Saba, Sarah Kapnick, Carlos Gaitan, and Ryan Rykaczewski.
Silicon and Zinc Biogeochemical Cycles Coupled through the Southern Ocean
Former AOS Associate Research Scholar Greg De Souza (Institute of Geochemistry and Petrology, ETH Zurich) is the coauthor of a paper addressing the mystery of oceanic Zn-Si coupling and the role of Southern Ocean. Notably, the authors' hypothesis for the marine zinc cycle owes much to AOS Faculty Member Jorge Sarmiento's important 2004 Nature paper on the silicon cycle. The paper was published recently in Nature Geoscience.
Improved Management of Small Pelagic Fisheries through Seasonal Climate Prediction
AOS Associate Research Scholar Desiree Tommasi recently published research about forecasting the Pacific sardine. GFDL Research Oceanographer Charlie Stock and Gabe Vecchi, professor of Geosciences and PEI who worked on the research while at GFDL, are among the study's coauthors. The paper was published on Tuesday in Ecological Applications. NOAA Q&A with Desiree Tommasi
AOS Program Biogeochemistry Seminar Series -- Friday, March 3rd at 2pm -- Keith Rodgers (AOS) " Wind stirring impacts on Southern Ocean summertime mixed layer depths and biogeochemistry" Sayre Hall Conference Room
Regional Dry-season Climate Changes due to Three Decades of Amazonian Deforestation
A substantial portion of the clouds and precipitation in the Amazon rainforest are generated locally by the forest itself, making it a unique biome capable of self-supporting its ecosystems to some extent. But deforestation has affected about 20% of this rainforest. A new study led by former AOS Graduate Student Jaya Khanna (University of Texas, Austin) shows that contemporary deforestation, occurring at scales of a few hundreds of kilometers, has resulted in a spatial redistribution of precipitation which can have contrasting impacts on vegetation dynamics in the upwind and downwind parts of the forest clearing. The study, coauthored by Former AOS Faculty Member David Medvigy (Notre Dame), AOS Director Stephan Fueglistaler, and Robert Walko (University of Miami), was published February 20 in the journal Nature Climate Change.
Congratulations to AOS Graduate Student Jane Baldwin who was recently selected as a top student paper presenter at the (AMS) Eighth Conference on Environment and Health for her oral presentation entitled,"Quantifying the Risk of Compound Heat Wave Events."
PWiGS Lunch Discussion with Roel Snieder February 17th
Members of the GEO and AOS community are invited to the first PWiGS event of the semester, an informal lunch discussion with Professor Roel Snieder, Colorado School of Mines. The discussion, entitled "Self management in the academic career," will take place on Friday, February 17 at 1pm in Guyot 154. Lunch will be provided.
Spring 2017 PEI Faculty Seminar Series: "The Outsized Role of the Southern Ocean in the Regulation of Carbon, Heat, and Biological Productivity" George J. Magee Professor of Geoscience and Geological Engineering Jorge Sarmiento
Tuesday, 02/07/2017 - 12:30pm to 1:30pm Guyot Hall, Room 10
AOS Associated Faculty Member S. George Philander, Princeton University's Knox Taylor Professor of Geosciences, will share the 2017 Vetlesen Prize for his work in uncovering the global scale of El Niño, the world's most powerful weather cycle. Established in 1959, the biennial prize is presented by Columbia University's Lamont-Doherty Earth Observatory and includes a $250,000 prize.
Phytoplankton provide the energy that sustains marine fish populations. The relationship between phytoplankton productivity and fisheries catch, however, is complicated by uncertainty in catch estimates, fishing effort, and marine food web dynamics. The researchers of a new study published January 23 in the Proceedings of the National Academy of Sciences (PNAS) and led by GFDL Research Oceanographer Charlie Stock, enlist global data sources and a high-resolution earth system model to address these uncertainties. Jasmin John (GFDL), Ryan Rykaczewski and Rebecca Asch (formerly AOS), John Dunne (GFDL) and Jorge Sarmiento (AOS) are among the paper's coauthors. GFDL Research Highlights
Climate Change to Alter Global Pattern of Mild Weather
A new report led by former AOS Postdoctoral Research Associate Karin van der Wiel (Royal Netherlands Meteorological Institute) includes the first global analysis of how climate change may affect the frequency of mild-weather days, which are defined as having temperatures between 64 and 86 degrees Fahrenheit (18 and 30 degrees Celsius) with low rain and humidity. The current global average of 74 mild days a year will drop by 10 days by 2100, with mid-latitude areas such as the United States experiencing more mild days and tropical areas seeing more hot and humid days. The paper, published January 18 in the journal Climatic Change, is coauthored by GFDL Physical Scientist Sarah Kapnick, a former AOS postdoctoral research fellow, and Gabe Vecchi, professor of Geosciences, who worked on the research while at GFDL. NOAA Release
Congratulations to AOS Senior Meteorologist Suki Manabe who will share the BBVA Foundation Frontiers of Knowledge Award in the Climate Change category. Suki shares the prize with James Hansen of Columbia University. The award is bestowed for Manabe's and Hansen's contributions "to the development of mathematical models of the climate system, and their pioneering use of these models to understand and project how Earth's climate responds to changing concentrations of atmospheric CO2, and other perturbations."
The Fire through the Smoke: Working for Transparency in Climate Projections
To help policymakers more confidently prepare for the effects of climate change, a group of preeminent climate scientists, including AOS Associated Faculty Member Michael Oppenheimer, evaluated the scientific work and expert judgments behind the most recent projections from the Intergovernmental Panel on Climate Change regarding the potential ecological, social, economic and meteorological repercussions of climate change. The report was published on January 4 in the journal Nature Climate Change.
Regular Weekly Seminars
Throughout the academic year, Geophysical Fluid Dynamics Laboratory (GFDL) hosts seminars every Wednesday at noon - 1:00 p.m. and every Thursday from 2:00 pm - 3:00 p.m. in the Smagorinsky Seminar Room. These events feature internal and external speakers who discuss their research on various aspects of atmosphere, ocean, weather and climate.
Click here for a complete list of GFDL seminars.
Geosciences hosts a number of events including their departmental lecture series on Tuesdays at 12:30 p.m., the Environmental Geology & Geochemistry Seminar (EGGS) Lecture Series on Thursdays at 12:30-1:30 p.m., and the Solid Earth Brown Bag Seminars on Friday at 12 noon in Guyot Hall Room 220. They also regularly host their Junior Colloquium .
Click here for a complete list of Geosciences events.
The David Bradford Seminars in Science, Technology and Environmental Policy, co-sponsored with the Princeton Environmental Institute, are a lunchtime seminar series held at Wallace Hall, Room 300 at noon - 1:00 p.m. Lunch is provided starting at 11:45 a.m.
Click here for a complete list of STEP seminars.