News Archive 2014

Persad Awarded AGU Outstanding Student Award Paper for Second Consecutive Year

AOS Graduate Student Geeta Persad was the recipient of an Outstanding Student Paper Award (OSPA), in the Atmospheric Sciences Section, by the American Geophysical Union (AGU) at the 2014 Fall meeting in San Francisco.  Her presentation entitled, "Similarities in the Spatial Pattern of the Surface Flux Response to Present-Day Greenhouse Gases and Aerosols" was one of only 18 papers chosen for this distinction in the Atmospheric Sciences Section.

Reseachers Develop a New Way of Looking at Alkalinity Measurements

In a new study led by former AOS Associate Research Oceanographer Brendan Carter, a research associate with the Joint Institute for the Study of the Atmosphere and Ocean at the University of Washington, Carter and coauthors developed a new way of looking at alkalinity measurements.  Their methods allow them to better examine the chemical signatures of river water and of organisms that build their shells out of the mineral calcium carbonate.  They use their new methods to determine what controls the chemical saturation of calcium carbonate, which is thought to determine in part how easy it is for organisms to build their shells out of this mineral.  The authors find surface calcium carbonate saturation is primarily determined by gas exchange driven by warming and cooling, and secondarily by rain and evaporation.  Calcium carbonate cycling as the shells of organisms comes in third place.  J.R. Toggweiler, Bob Key and Jorge Sarmiento are coauthors of the study, published in Biogeosciences on December 19.

Study Examines Regional Atmospheric Effects of Contemporary Deforestation in the Amazon Rain Forest

A new study coauthored by AOS Graduate Student Jaya Khanna and AOS Faculty Member David Medvigy investigates the effects of Amazonian deforestation on regional hydroclimate. This numerical study shows that contemporary scale deforestation in the southern parts of the Brazilian Amazon can result in an increase in convective activity and cloudiness. The authors find that contemporary scales of deforestation can result in increase in humid conditions in the downwind deforested areas, whereas suppression of cloudiness in the upwind deforested areas. Differences in vegetation height between forested and deforested regions are found to rigger this hydroclimatic effect. This unique convective regime can have implications for climate impact studies of near future deforestation in the Amazon.  The study was published in the Journal of Geophysical Research - Atmospheres.

Winter Poster Expo at GFDL

GFDL is hosting a Poster Expo on Wednesday, January 28, 2015 from 1pm-4pm.  The Winter Expo is an opportunity for GFDL/AOS/CICS scientists to share their research with colleagues.  Posters are limited to 30; existing posters are acceptable.  Register early, but no later than 5pm on Wednesday, January 7.

Abandoned Wells can be 'Super-Emitters' of Greenhouse Gas

A team of Princeton University researchers, including Denise Mauzerall (AOS Associated Faculty) has uncovered a previously unknown, and possibly substantial, source of the greenhouse gas methane to the Earth's atmosphere. After testing a sample of abandoned oil and natural gas wells in northwestern Pennsylvania, the researchers found that many of the old wells leaked substantial quantities of methane. Because there are so many abandoned wells nationwide (a recent study from Stanford University concluded there were roughly 3 million abandoned wells in the United States) the researchers believe the overall contribution of leaking wells could be significant. The paper was published Dec. 8 in the Proceedings of the National Academy of Sciences.

AOS Program Biogeochemistry Seminar --  Wednesday, December 10th at 1pm -- Ben McNeil (University of South Sales) " Future surface ocean hypercapnia: How anthropogenic changes induce non-linear CO2 extremes "  Sayre Hall Conference Room

Hiscock to Serve as Convener for AGU's Largest Session in the Global Environmental Change Program

Former AOS Associate Research Scholar Mike Hiscock, an EPA National Center for Environmental Research scientist, will serve as convener for AGU’s largest session in the Global Environmental Change Program at the American Geophysical Union (AGU) Fall meeting scheduled for Dec. 17-18. The technical session, titled Extreme Events and Climate Change: Impacts on Environment and Resources, will consist of a full day of oral presentations and a half day of poster sessions. It will feature 74 presentations from 20 countries, 14 STAR (Science to Achieve Results) Grantees from the RFA Extreme Event Impacts on Air Quality and Water Quality with a Changing Global Climate, and presentations from 4 other EPA scientists and 9 Federal entities.

Congratulations to Erica Staehling who successfully defended her Ph.D. Thesis "The Influence of African Easterly Waves on Atlantic Tropical Cyclone Activity" on December 8, 2014.

Congratulations to Claire Radley who successfully defended her Ph.D. Thesis "Understanding the Dependence of Tropical High Cloud Amount and Radiative Flux on Sea Surface Temperature" on December 3, 2014.

In the News ... Robotic Floats Will Reveal Southern Ocean’s Mysteries

This December, Hannah Zanowski, a graduate student at Princeton University, will travel to Cape Town, South Africa, bundle up in something warm, and board a German research icebreaker called the Polarstern. Over the next eight weeks, the ship will make its way from the southern tip of Africa to the bottom of South America via the Weddell Sea off the coast of Antarctica, stopping every so often along the way, so Zanowski and the scientists she’ll be working with can plop one of 12 yellow, oblong, instrument-laden, robotic floats into the sea.

AOS Program Biogeochemistry Seminar --  Friday, December 5th at 3pm -- Daniele Bianchi (University of Washington) "Oxygen minimum zones in CM2.6: Mean state, variability, and o2her o2dities"  Sayre Hall Conference Room

Congratulations to Amanda O'Rourke who successfully defended her Ph.D. Thesis "Influence of Long and Short Planetary Waves on the Separation of the Eddy-Driven and Subtropical Jets" on November 24, 2014.

Southern Ocean Plays Dominant Role in Anthropogenic Carbon and Heat Uptake in CMIP5 Models

A new study led by AOS Collaborator Thomas Frölicher (ETH Zurich) assesses the uptake, transport and storage of anthropogenic carbon and heat in the Southern Ocean in a new set of couple carbon-climate Earth System Models conducted for the fifth Coupled Model Intercomparison Project (CMIP5).  The study shows that the Southern Ocean accounts for 43% of anthropogenic CO2 and 75% of heat uptake by the ocean over the historical period, underscoring the significant role the Southern Ocean plays in global climate.  AOS Director Jorge Sarmiento is a coauthor of the study along with GFDL Scientists, David Paynter, John Dunne, John Krasting and Mike Winton. The study was recently published in the Journal of Climate.

AOS Program Biogeochemistry Seminar --  Friday, Nov. 21st at 3pm -- Adele Morrison, "Dynamics of the Weddell Polynya in CM2.6"  Sayre Hall Conference Room

On Monday November 17thDr. Beth Orcutt (Bigelow Laboratory for Ocean Sciences in East Boothbay Maine) will be giving the departmental seminar in Geosciences at 12:30 pm in Guyot 10. In addition to her seminar, Dr. Orcutt  will be participating in an informal work-life and professional development dinner with early career scientists in Geosciences and AOS.

Where: Campus Club (5 Prospect Ave) 
When: Monday November 17th from 6:00 to 8:00 PM
Dinner and drinks will be served

Past discussions topics include: work-life balance, career choice, and identifying mentors. A more detailed summary can be found here.
** RSVP to Darcy McRose (mcrose@princeton.edu) by Tuesday November 11th.

AOS Program Biogeochemistry Seminar --  Friday, Nov. 14th at 3pm -- Ivy Frenger, AOS, "Southern Ocean water mass structure in CM-1deg, CM2.5 and CM2.6 "  Sayre Hall Conference Room

Suki Manabe Awarded 2015 Benjamin Franklin Medal in Earth and Environmental Science by The Franklin Institute

Congratulations to AOS Senior Meteorologist Suki Manabe on being awarded the 2015 Benjamin Franklin Medal in Earth and Environmental Science by The Franklin Institute. The award recognizes Suki "for his pioneering research on the sensitivity of Earth’s climate to increasing carbon dioxide in the atmosphere and his development of global climate models, which have led to fundamental advances in the understanding of climate variability and to methods for predicting future climate change."

New Study Examines the Influence of Asia’s High-Mountain Seasonal Cycle on Regional Differences in Climate Change

A new study led by AOS Postdoctoral Research Fellow Sarah Kapnick compares a set of high-resolution models simulations  with the latest available observations to focus on the distinct seasonal cycles and resulting climate change signatures of Asia’s high-mountain ranges.  The findings, published in Nature Geoscience, suggest a meteorological mechanism for regional differences in the glacier response to climate warming. 
GFDL Research Highlights 

AOS Program Biogeochemistry Seminar --  Friday, Nov. 7th at 3pm -- John Dunne, GFDL, "Publication planning for CM2.6-miniBLING"  Sayre Hall Conference Room

Congratulations to former AOS Faculty Member Ngar-Cheung (Gabriel) Lau on being the selected as the AMS Bernhard Haurwitz Memorial Lecturer for 2015, for “pioneering work on atmospheric circulation systems, from oceanic storm tracks to atmospheric ‘bridges’ connecting ocean anomalies in different basins, using observations and global models.”

Congratulations to AOS Faculty Member Tom Delworth for being elected an AMS Fellow. Fellows are selected each year for their “outstanding contributions to the atmospheric or related oceanic or hydrologic sciences or their applications during a substantial period of years."

Congratulations to AOS Faculty Member Yi Ming on being awarded the Henry G. Houghton Award by the American Meteorological Society (AMS) "for major advances in the understanding and modeling of the role of atmospheric aerosols in the radiative forcing of regional and global climate."

Fall Foliage Season may be Later, but Longer on Warmer Earth

Climate change could postpone fall leaf peeping in some areas of the United States as summer temperatures linger later into the year, Princeton University researchers report in the journal Global Ecology and Biogeography.  Trees need daily temperatures to be low enough and daylight hours to be short enough to produce the vivid vistas of fall, explained senior author David Medvigy, an assistant professor of geosciences. He and first author Su-Jong Jeong, a former AOS postdoctoral associate now at NASA, found that daily temperature and daylight hours can not only be used to predict the timing of leaf coloration, but that the influence of these factors depends on the individual tree species and the specific geographic area.  full story

Recent Study Investigates the Role of Aerosol Absorption in Driving Clear-Sky Solar Dimming over East Asia

The amount of solar radiation reaching the surface is a major driver of the surface energy balance and influences regional circulation and precipitation. Over East Asia, observations show a significant reduction in clear-sky surface solar radiation since the 1960s, colloquially referred to as “dimming,” primarily caused by large regional increases in anthropogenic aerosol emissions. A recent paper, led by AOS Graduate Student Geeta Persad, constitutes a novel mechanistic investigation of the drivers of East Asian clear-sky dimming that sheds light both on the nature of the observed dimming trends and on the behavior of the aerosol formulations in GFDL’s models. Yi Ming, an AOS lecturer, and GFDL Director V. Ramaswamy are coauthors of the study published in the Journal of Geophysical Research-Atmospheres.

AOS Graduate Student/Postdoc Retreat - 2014

On Thursday, September 11, 2014 AOS graduate students, postdocs, and faculty gathered for a one-day retreat at Mountain Lakes House in Princeton.  This was the third annual retreat organized by AOS students and faculty to promote scientific and social interactions among the AOS community and to welcome incoming students.  Photo Album

SOCCOM Program Awarded National Science Foundation Grant to Study the Southern Ocean

Encircling Antarctica and soaking up half of the human-made carbon in the atmosphere and majority of the planet’s excess heat, the vast Southern Ocean has remained relatively mysterious to scientists until now.   Thanks to a six-year initiative that will advance understanding of the role of the Southern Ocean in climate change and biogeochemistry, the secrets of the Southern Ocean may finally be revealed.  full story

AOS Program Biogeochemistry Seminar Series

On Friday, Sept. 19th @ 9:30am, Zouhair Lachkar (Center for Prototype Climate Modeling (CPCM), NYU, Abu Dhabi) will be presenting a seminar titled  "Effects of climate forcing on ocean acidification and de-oxygenation in eastern boundary upwelling systems: Insights from regional eddy-resolving simulations."  Please join us in the Sayre Hall Conference Room.


The AOS Program extends a warm welcome to its newest members -- Graduate Students
Chiung-Yin Chang, Xin Rong Chua, Spencer Clark, Michelle Frazer, Tsung-Lin Hsieh, Ching Ho Justin Ng, and Sarah Schlunegger!

New Study Explores Seasonal Prediction of Regional Tropical Cyclone Activity

Tropical cyclones (TCs, which include hurricanes and typhoons) are a major climate hazard across the Northern Hemisphere, and have exhibited variability and change on year-to-year timescales. In a new study led by Gabe Vecchi, a lecturer in the Department of Geosciences and the AOS Program, the authors use a new high-resolution coupled climate model (GFDL-FLOR) to assess predictions of regional seasonal TC activity produced up to three seasons in advance.  The paper "On the Seasonal Forecasting of Regional Tropical Cyclone Activity" was recently published in the Journal of Climate and can be found hereGFDL Research Highlights

Congratulations to Sam Potter who successfully defended his Ph.D. Thesis "Superrotation and tropical waves in idealized atmospheric models" on August 15, 2014.

AOS Summer Intern Presentations Scheduled for Friday, August 8

2014 summer intern presentations are scheduled for Friday, August 8 from 2:00 to 4:00 pm in the Sayre Hall Conference Room.

Congratulations to Joe Majkut who successfully defended his Ph.D. Thesis "Variability and Trends in the Carbon Cycle" on August 1, 2014. 

In the News ... Princeton launches Art of Science 2014 Online Galleries

The "Art of Science 2014" exhibit showcases 44 images of artistic merit created during the course of scientific research. More than 250 images were submitted by undergraduates, graduate students, faculty, postdocs, staff and alumni representing over 25 departments. This year, for the first time in its seven-year history, the competition also includes video. Twelve videos were chosen from more than 50 submissions.  Check out AOS Associate Research Scholar Martin Jucker's Fly Me video (best seen wtih blue-red 3D glasses) in the video gallery.  Art of Science 2014 was co-sponsored by the Cooperative Institute for Climate Science (CICS)Related article

New Study Evaluates and Predicts Large-Scale Variations of Leaf Coloration throughout the Continental U.S. Using Macroscale Observations and Models

A new study coauthored by AOS Faculty Member David Medvigy explains the environmental factors that cause the leaves to change color in autumn.  Variations in the timing of leaf coloring throughout the U.S., why the leaves of different species change color at different times, and how the timing of leaf coloring will change over the next 100 years are discussed.   The lead author of the paper is Su Jong-Jeong, a former AOS postdoctoral associate presently at NASA/Jet Propulsion Laboratory.  The paper, titled "Macroscale prediction of autumn leaf coloration throughout the continental United States," was recently published online in Global Ecology and Biography and can be found here.

Baldwin Among Graduate Students Selected to Join PECS

Congratulations to AOS Graduate Student Jane Baldwin who was recently selected for the Princeton Energy Scholars (PECS) group.  She is among the eight new graduate student members selected for the 2014-2015 academic year. 

New Study Shows Strong Links between Climate and Marine Food Web along Coastal West Antarctic Peninsula

Understanding the mechanisms by which climate variability affects multiple trophic levels in food webs is essential for determining ecosystem responses to climate change.  A new study, coauthored by AOS Visiting Research Collaborator Vincent Saba (NOAA National Marine Fisheries Service), uses over two decades of data collected by the Palmer Long Term Ecological Research program (PAL-LTER) to determine how large-scale climate and local physical forcing affect phytoplankton, zooplankton, and an apex predator along the West Antarctic Peninsula (WAP). The authors show that positive anomalies in chlorophyll-a (chl-a) at Palmer Station, occurring every 4-6 years, are constrained by physical processes in the preceding winter/spring and a negative phase of the Southern Annular Mode (SAM). Years of positive chl-a anomalies are associated with the initiation of a robust krill cohort the following summer, which is evident in Adélie penguin diets, thus demonstrating tight trophic coupling. Projected climate change in this region may have a significant, negative impact on phytoplankton biomass, krill recruitment, and upper trophic level predators in this coastal Antarctic ecosystem.   The study, led by Grace Saba (IMCS, Rutgers), was published on July 7 in Nature Communications and is available hereRelated article  Related article

Poster Expo

GFDL is hosting a Poster Expo on Wednesday, July 16th from 10:00 am to 1:00 pm in the Smagorinsky Seminar Room.  The Expo is an opportunity to share your research and build cross-disciplinary interactions with colleagues and summer interns in an informal setting.  Due to an overwhelming response, there will be 30 posters for this premier event.  The program for the event, as well as a list of presenters and poster titles, is available here.

New Study Investigates Energy Transports Across the Equator

A new study led by AOS Graduate Student Spencer Hill uses a GFDL climate model to investigate how temperature changes caused by human-emitted greenhouse gases and aerosols affect how the atmosphere transports energy from the hot tropics to the cold poles.  In so doing, he and his GFDL coauthors, AOS Faculty Members Yi Ming and Isaac Held, provide a simple physical explanation for the widely reported result that movements of tropical rainfall north or south are tightly linked to energy transports across the equator.  The paper "Mechanisms of forced tropical meridional energy flux change" was recently published online in the Journal of Climate and can be accessed here.

In the News ... AOS Associated Faculty Member Denise Mauzerall

Reorganization of crop production and trade could save China’s water supply, according to a new report coauthored by Denise Mauzerall, an associated faculty member in the AOS Program.  See feature story.

New Study Analyzes Transpacific Transport of Black Carbon During HIPPO-3

Black carbon (BC) is an air pollutant that affects climate change, air quality, and human health.   A recent study, led by AOS Graduate Student Zhaoyi Shen, evaluates the transpacific transport of BC during HIPPO-3. The authors find that biomass burning from Southeast Asia is the major source of BC over the North Pacific during the March mission of HIPPO-3, while more than 90% of BC comes from anthropogenic sources in East Asia during the April mission. The aging process, which refers to a transformation from hydrophobic to hydrophilic aerosols, is one of the key factors controlling wet scavenging and remote concentrations of BC.  The findings show that the aging of anthropogenic BC is faster than of biomass burning BC. The authors also conclude that BC aging close to the source must be simulated accurately in models in order to simulate better the global abundance and climate forcing of BC.   The paper, “ Analysis of Transpacific Transport of Black Carbon during HIPPO-3: Implications for Black Carbon Aging,” was recently published in Atmospheric Chemistry and Physics and can be found here.

In the News:  Software Renders Earth's Atmosphere in 3-D Splendor

To create computer models that look like the Earth's actual atmosphere, AOS Associate Research Scholar Martin Jucker developed a freely available software package for ParaView — an open-source software package that is one of the most popular programs for visualizing scientific data — that calculates the true spatial dimensions and curvature of Earth's atmosphere. Recently published in the Journal of Open Research Software, the package, known as "pv_atmos," allows researchers to create spherical and correctly proportioned 3-D models of atmospheric data.  The software is free and available at: https://github.com/mjucker/pv_atmos

New Paper Explores an Observing System Simulation for Southern Ocean Carbon Dioxide Uptake

AOS Graduate Student Joe Majkut is the lead author of a new study that reviews current estimates of the CO2 uptake in the Southern Ocean and projections of its response to climate change. The authors show, via an observational system simulation experiment, that float-based sampling provides a significant opportunity for measuring the mean fluxes and monitoring the mean uptake over decadal scales. AOS Associate Research Oceanographer Brendan Carter, AOS Collaborator Thomas Froelicher (ETH Zurich), Carolina Dufour, an AOS postdoctoral research associate, and Associate Research Scholar Keith Rodgers are coauthors on the study along with AOS Director Jorge Sarmiento. The paper, "An Observing System Simulation for Southern Ocean Carbon Dioxide Uptake" was published on June 2 in the Royal Society journal Philosophical Transactions of the Royal Society A and can be found here.

Recent Study Demonstrates the Importance of the Southern Ocean for the Cycling of Silicon in the Sea

Silicon dissolved in seawater is a vital nutrient for siliceous organisms, such as the diatoms that play an important role in naturally sequestering carbon within the ocean. A recent study, led by AOS Postdoctoral Research Fellow Greg de Souza, combines recent, novel observations of the stable isotope composition of silicon dissolved in seawater with a model simulation of the ocean's silicon cycle. The authors demonstrate that the observed silicon isotope distribution in the ocean reflects the importance of the Southern Ocean, the circumpolar ocean surrounding Antarctica, for the cycling of silicon in the sea. In line with previous work in the Sarmiento group (Sarmiento et al., 2004; 2007; Palter et al., 2010), the study provides observationally ground-truthed evidence for the Southern Ocean's dominant role in determining global ocean nutrient biogeochemistry. AOS Director Jorge Sarmiento and Rick Slater, an AOS senior earth system modeler, are coauthors of the study along with John Dunne (GFDL) who collaborates with the Sarmiento Group. Access the study here.

GFDL Poster Expo Wednesday, July 16th

GFDL is hosting a Poster Expo on Wednesday, July 16 from 10am-1pm.  The Expo is an opportunity for GFDL/AOS/CICS scientists to share their research with colleagues and current summer interns being hosted by GFDL/AOS/CICS.  Posters are limited to 25; existing posters are acceptable.  Register early, but no later than 5pm on Monday, June 16.

Q&A with Denise Mauzerall: Clearing the Air

AOS Associated Faculty Member Denise Mauzerall is featured in a Princeton Alumni Weekly Q&A disussing the health impacts of air pollution and climate change and what to do about them. full story

In the News ... Oppenheimer Tells Committee on Science, Space, and Technology IPCC Needs Greater Transparency

The Intergovernmental Panel on Climate Change Process (IPCC) provides vital, regular assessments of scientific literature. Yet greater transparency is needed, AOS Associated Faculty Member Michael Oppenheimer told the Committee on Science, Space, and Technology in Washington, D.C. Testifying before the Committee on Science, Space and Technology on Thursday, May 29, Oppenheimer examined the process behind the UN's IPCC Fifth Assessment Report, published earlier this year.

Work-Life and Professional Development Chat with Meredith Hastings

Princeton Women in Geosciences (PWiGS) has organized a work-life and professional development chat with Meredith Hastings of Brown University, Princeton GEO PhD '04 and co-founder of the Earth Science Women's Network. This event is open to all early career scientists from GEO and AOS.

The Series will consist of two days of roundtable discussions with Prof. Hastings on a range of topics requested by you.

Where: Guyot 100
When: Thursday, June 12, 12:00-1:30 pm and Friday, June 13, 9:30-11:00 am & 12:00-1:30 pm

RSVP at http://tinyurl.com/PWiGS-Hastings

*This event is sponsored by The Graduate School, AOS Program, and GEO Department and organized by PWiGS.

AOS Program Biogeochemistry Seminar Series - June 6, 2014 at 2pm
Sayre Hall Conference Room
Presenter: Jonathan Lauderdale, MIT
"Oceanic controls on air-sea CO2 fluxes"

Recent Study Provides a New Estimate for Eddy Scale

AOS Graduate Student Junyi Chai is the lead author of a recent study that provides a new estimate for eddy scale. The results of this study fill in the gap between studies that assume the Rossby deformation radius is a good estimate for the eddy scale and studies that assume an inverse energy cascade is relevant.  Former AOS Faculty Member Geoff Vallis (University of Exeter) coauthors the study.  The study can be found here.

In the News ... AOS Alumna Featured in Nature

Former AOS Graduate Student Tracey Holloway was featured in Nature last month discussing her plans to turn a network for female researchers into a non-profit organization.

2014 GFDL Science Review May 20-22

GFDL will be holding its quinquennial Science Review May 20-22, 2014. If you would like to observe the public sessions on May 20 and May 21, webinar registration is available at the Review website.    Preliminary Agenda

PICSciE Symposium on Data Science May 16, 8am-6pm, Lewis Science Library

A one-day symposium showcasing presentations and open discussion of challenges and results from data-intensive research in the sciences and humanities.

New Southern Ocean Observational Initiative -- Update!

NB Palmer P16S and Biogeochemical Floats Weekly Report 4 -- NBP14-03 GO-SHIP P16S Chief Scientists’ Weekly Report #4. April 14, 2014

In the News ... April 10, 2014

Check out a feature story about NASA's GEOS-5model (and other, high-res chemistry-climate models) that are helping scientists understand stratospheric ozone intrusion events.  AOS Associate Research Scholar Meiyun Lin contributed to the story.

Perseverance and Support Play Key Roles in Women's Success in Stem

Women from across Princeton University's science and engineering departments -- including the AOS Program -- gathered to discuss and find solutions to the challenges that female scientists face during the March 29 Women in STEM symposium. The event included a keynote address by Emily Carter, Princeton's Gerhard R. Andlinger Professor in Energy and the Environment, as well as a panel discussion with women in various stages of their scientific careers, from undergraduate students to administrators.           full story

A New Southern Ocean Observational Initiative Underway!

As chief scientists on the icebreaker R/V Nathaniel B. Palmer, Lynne Talley (Scripps Institution of Oceanography) and Brendan Carter, co-chief scientist and AOS Associate Research Scholar, are playing a lead role in what hopes to be a major new observational initiative that will give the scientific community unprecedented year-round coverage of biogeochemistry in the Southern Ocean, the least observed and least understood region of the world’s oceans.

On March 20th, Carter and Talley, along with 27 fellow scientists, embarked on a 45-day journey from Hobart, Tasmania to Papeete, Tahiti for the first deployment of bio-Argo floats far south of New Zealand. The ship is carrying the first set of fully-equipped Southern Ocean biogeochemical profiling floats, measuring oxygen, nitrate, fluorescence and backscatter, and -- the newest addition -- pH. The field campaign is part of the US Repeat Hydrography, P16S, 2014 under the auspices of GO-SHIP and sponsored by the US Climate Variability and Predictability Program (CLIVAR).

The first float, launched on March 26th about 900 miles south of New Zealand, is one of 12 floats being deployed as part of the global Argo float array, profiling every 10 days to 2000 m depth. With the goal of observing the Southern Ocean’s important uptake of excess CO2 from the atmosphere and directly observing its acidification resulting from global change, scientists hope that these floats will be the ‘tip of the iceberg’ when it comes to the growing Southern Ocean Observing System.  P16S Blogs

Work-Life and Professional Development Chat with Sofia Olhede

Princeton Women in Geosciences (PWiGS) has organized a work-life and professional development chat with Sofia Olhede, a full professor of statistical science at University College London .  At UCL, in addition to being one of very few female professors in her field, Sofia has been instrumental in developing a mentoring network for women in Math and Science. This event is open to all early career scientists from GEO and AOS.

Where: Guyot Hall M171
When: Thursday, April 3rd, 6-7:30 PM

RSVP to <sfawcett@princeton.edu> by Tuesday, 4/1/14

*This event is sponsored by The Graduate School, AOS Program, and GEO Department and organized by PWiGS.

AOS and GFDL Scientists Reach Out to Girls at Young Women's Conference in Science

AOS and GFDL scientists were among 25 scientists from fields ranging from astrophysics to oceanography to biogeochemistry to robotics who participated in the Young Women's Conference in Science, Technology, Engineering and Mathematics on Friday, March 21st in the Frick Chemistry Laboratory.  An annual event launched in 2001, the conference introduces middle-school and high-school aged girls (in 7th through 10th grades) to women scientists and engineers and the wide breadth of careers available to them in these fields. Ivy Frenger (AOS), Sonya Legg (AOS), Todd Mooring (AOS), Allison Smith (AOS), Desiree Tommasi (GFDL), Marian Westley (GFDL), and Hannah Zanowski (AOS) spent the day with the girls in a variety of formats including, small-group presentations and hands-on demonstrations and activities.  Almost 400 young women from 46 schools in New Jersey, New York and Pennsylvania attended the event.
Related article  Related article

Women in Stem Symposium

You are invited to register to attend the upcoming Women in STEM Symposium, which is taking place on Saturday, March 29, from 12pm-6pm, in the Carl Icahn Laboratory Atrium. The Symposium provides a venue for students, faculty, and staff from science and engineering disciplines to share their research and celebrate the contributions of female researchers in the Princeton community.

Registration is free and open to the public. The event is organized and sponsored by the Graduate School and the Women in STEM Working Group.

New Study Shows that Oceanic Lee-Waves Make an Impact on Large-Scale Circulation and Climate -- Indicating the Importance of Including this Process in Climate Models

Former AOS Postdoc Angélique Melet, currently a postdoc at CNES/LEGOS in France, is the lead author of new paper that explores the combined effects of internal tide– and lee wave–driven mixing on the ocean state.   This is the first time the effect of oceanic lee-waves has been parameterized in a climate model. The results show that lee-waves make an impact on the large-scale circulation and climate, indicating the importance of including this process in climate models. AOS Faculty Members Robert Hallberg, a GFDL oceanographer, and Sonya Legg are coauthors on the study, along with Maxim Nikurashin, a lecturer/research fellow at the Institute for Marine and Antarctic Studies, University of Tasmania and a former AOS associate research scholar. The paper, "Sensitivity of the Ocean State to Lee Wave–Driven Mixing," is published in the March issue of the Journal of Physical Oceanography and can be found here.

Work-Life and Professional Development Chat with Katja Fennel

Princeton Women in Geosciences (PWiGS) has organized a work-life and professional development chat with Dr. Katja Fennel  from Dalhousie University. This event is open to all early career scientists from GEO and AOS.

Where: Campus Club Prospect Room (5 Prospect Ave) 
When: Wednesday, April 9th, 6-7:30 PM

RSVP by Tuesday, 4/1/14

*This event is sponsored by The Graduate School, AOS Program, and GEO Department and organized by PWiGS.

Work-Life and Professional Development Chat with Diane McKnight

Princeton Women in Geosciences (PWiGS) has organized a work-life and professional development chat with Professor Diane McKnight from University of Colorado Boulder.  This event is open to all early career scientists from GEO and AOS.

Where: Campus Club (5 Prospect Ave)
When: Tuesday, March 11th from 6:30 to 8:30PM.

RSVP by 3/6/14 via email to: <johannag@princeton.edu>

*This event is sponsored by The Graduate School, AOS Program, and GEO Department and organized by PWiGS.

New Study Provides Mechanistic Insight into the Effects of Climate Change on Larval Cod

GFDL Research Oceanographer Charles Stock, who collaborates with the Sarmiento group, is the coauthor of a new study that uses climate projections from GFDL's ESM2.1 to force an individual-based model of North Atlantic Cod larvae at each of 5 cod spawning sites across the North Atlantic. The ESM-IBM coupling provides a unique means of exploring the mechanistic response of cod larvae to climate forcing. The study is published in Global Change Biology and can be found here
GFDL Research Highlights

Perspectives Piece Examines Seasonal Hurricane Predictions

Gabriel Vecchi
, a lecturer in the Department of Geosciences and the AOS Program and a GFDL researcher, is the co-author of a Perspectives piece on seasonal hurricane predictions appearing in Science February 7.   The piece discusses the current state and ways forward on seasonal hurricane prediction, including prediction verification, learning from failed predictions, and correctly describing and communicating uncertainty. The piece can be accessed here.

New Study Examines Hawaiian Ozone Changes

In a new study led by AOS Research Scholar Meiyun Lin, researchers found that since the mid-1990s, shifts in atmospheric circulation have caused Asian ozone pollution reaching Hawaii to be relatively low in spring but rise significantly in autumn. The findings, published online Jan. 26 in Nature Geosciences, indicate that variability in airflow patterns must be considered when attributing observed ozone changes to human-induced trends in precursor emissions.   The study can be found here
Princeton Journal Watch article

Career Chat & Dinner with Lynne Talley

Princeton Women in Geosciences (PWiGS)  has organized a career and research discussion with with Dr. Lynne Talley from the Scripps Institution of Oceanography. This event is open to all early career scientists from GEO and AOS. 
Where: Campus Club Library (5 Prospect Ave) 
When: Thursday, January 30th from 6-8pm
RSVP by 1/24/14