SPACE/COSMOS
New project investigates mysteries of Sun’s atmosphere
University of Exeter
image:
Observations of a sunspot taken on 04/10/2017 in H-alpha using the New Solar Telescope at Big Bear Solar Observatory.
view moreCredit: Juie Shetye (NMSU), Erwin Verwichte (Warwick), Kevin Reardon (NSO)
A new £5 million, five-year project will tackle fundamental questions in solar physics.
The Sun’s activity has a profound impact on satellites, humans in space and technology on Earth.
To understand the physical processes behind the Sun’s activity, it is vital for any simulation to capture the fundamental interplay between the Sun’s radiation and conditions in the vastly different layers of the Sun’s atmosphere (the photosphere, the chromosphere and corona), the complex coupling between them, and how magnetic flux emergence drives eruptions and flares.
No model can currently do this – but one is necessary to understand the cutting-edge observations produced by new facilities, and to provide a step-change in our understanding of how the solar atmosphere works.
The Solar Atmospheric Modelling Suite, or SAMS, project aims to build a next-generation modelling tool for the solar atmosphere – making a code that can be run on anything from laptops to the latest supercomputers.
SAMS is funded as a flagship project by the Science and Technology Facilities Council’s (STFC) new Large Award scheme.
The project team is led by the University of Exeter and includes the universities of Warwick, Sheffield and Cambridge.
"For a long time the UK was the leading the way in simulating the atmosphere of the Sun, but in recent years we have been eclipsed,” said Professor Andrew Hillier, from the University of Exeter.
“This project will put us right back as one of the leaders in this area.”
For this project, the team will build a modelling suite with detailed physics-based documentation to promote ease of use.
This will be open-source with world-leading physics capabilities designed to maintain the UK’s solar physics community at the forefront of international research whilst pushing forward research in groups around the world.
This will also enable full exploitation of next-generation observations and Exascale computing.
This project will also provide training for early career researchers on the complex underlying physics of the solar atmosphere and how to model this with SAMS..
Dr Erwin Verwichte, Associate Professor (Reader), University of Warwick, said: “Warwick has built a world-leading reputation in numerical modelling of plasma physics.
“Our simulation codes, whether applied to fusion research, the Sun or space weather, are used by researchers across the world.
“The SAMS code will be built on top of that heritage and signifies a key stepping stone in simulating and expanding our knowledge of the Sun's atmosphere."
Professor Grahame Blair, STFC Executive Director of Programmes, said: "This substantial investment demonstrates our commitment to maintaining the UK's leading role in solar physics research.
“Understanding the complex dynamics of our Sun is vital not just for scientific advancement, but for protecting our technology infrastructure, satellite networks, power grids and communications systems on Earth from the impacts of space weather."
Configuration design method of mega constellation for low earth orbit observation
Beijing Institute of Technology Press Co., Ltd
image:
Fig. 1. Orbital distribution of LEO mega constellation.
view moreCredit: Space: Science & Technology
Satellite constellation has been applied in communication, reconnaissance, navigation, and other space missions, such as GPS, Glonass, Beidou, Starlink, etc. With the rapid development of Low Earth Orbit (LEO) constellations, mega constellation will inevitably become an important means of Earth observation and a key point in the development of future satellite technology. The configuration optimization design of LEO observation mega constellation in complex space environment is a nonlinear problem that is difficult to solve analytically. During the development, constellation design principles have shifted from the uniform coverage requirement to application requirements. However, previous method cannot provide solutions to constellation configuration optimal design based on high-precision orbital propagation. In a research article recently published in Space: Science & Technology, scholars from Harbin Engineering University, China Academy of Space Technology, and Stevens Institute of Technology together proposed a configuration design method of LEO mega constellation based on basic and accompanying satellites orbit design, considering satellite imaging width, formation flying of subgroup satellites, and global uniform coverage by payloads.
First, satellites in the mega constellation are categorized and the constellation design based on different satellite division is proposed. Satellites in the mega constellation are divided into 2 types, namely, the basic satellites and the accompanying satellites. All basic satellites that are surrounded by accompanying satellites are evenly distributed globally, and they have the same subsatellite trajectory. A basic satellite and its accompanying satellites are defined as a satellite group. The constellation is composed of many satellite groups, as shown in Fig. 1.
As for basic satellites, the semimajor axis a of regression orbit can be numerically solved considering (1) that regression orbit requires a satellite flies R times around Earth in D days and (2) that the influence of J2 perturbation force of an orbit satisfying e = 0 and M = f is zero (i.e. dΩ/dt = 0, dω/dt = 0, dM/dt = 0). Assuming that the ground coverage width of a satellite group is d, the number of basic orbital plane is Nt = ceiling(2πRe/d) where ceiling(⋅) is the round up function. Assuming that the maximum response time to complete Earth observation mission required by the user is mt and the orbital plane is evenly divided according to the orbital period T, the number of basic satellites in each orbital plane is Nn = ceiling(T/mt). Based on above analysis, input the i, e, and ω of the constellation and Q = R/D, then the basic satellites constellation is designed.
As for accompanying satellites, they have the semimajor axis with basic satellites. According to the Clohessy-Wiltshire equation, the relative motion trajectory between the basic satellites and the accompanying satellites is an ellipse. Then, considering that the position vectors at the initial time and T/2 relative to the basic satellite is oppositive, the orbital elements of the first accompanying satellites can be solved. Assuming that the imaging width of a single satellite is sd, the number of accompanying satellites in a satellite group is Na = ceiling(d/sd - 1). Divide the trajectory of the first accompanying satellite relative to basic satellite orbital coordinate system in chronological order, extract the position vectors of all equal points under the orbital system, and use these as the position vectors of other accompanying satellites under the basic satellite orbital system at initial time.
Combining the basic and accompanying satellites’ orbits, the configuration of mega constellation is obtained.
Then, the orbit parameters of satellite and its companions are set as initial values, and the precise orbits under the High Precision Orbit Propagator model are solved in the neighborhood by using the Nondominated Sort Particle Swarm Optimization algorithm. Transform the orbital elements of any basic satellite into position and velocity information, which is recorded as {pxpq, pypq, pzpq, vxpq, vypq, vzpq}. Add an increment to build their neighborhood, which can be expressed to {Δpxpq, Δpypq, Δpzpq, Δvxpq, Δvypq, Δvzpq}. The optimization variable of accompanying satellite orbit is the position and velocity increment of all basic satellites. The optimization objective f1 for the basic satellite configuration is to minimize the absolute difference between the ascending and descending nodes of any basic satellite bspq in cycle i, and the ascending and descending nodes of bs1q as much as possible. The optimization objective f2 of the accompanying satellite is to keep the relative position as close as possible under the basic satellite orbit system at multiple subsequent motion periods. Optimization iteration process involves continuously approaching the Pareto front. In practice, find all nondominant solutions of the initial individual as the optimal solution set. Calculate 2 optimization objectives of everyone in sequence, and use the nearest global nondominated individual and own historical nondominated individual as learning objects. Update individual optimization variables and variable increments based on population information, individual experience, and self-inertia, as shown in Fig. 10. Then calculate the f1 and f2 of newly generated individuals again, and regenerate the global Pareto front and individual historical Pareto front. After a fixed number of cycles or objective function is less than the threshold, the iteration ends and the global Pareto front can be obtained. At this point, the final constellation configuration can be selected based on user preferences or linear superposition of f1 and f2.
Finally, the correctness of the configuration design method is verified by numerical simulation. In the simulation, set the constellation orbital inclination as 66°, eccentricity as 0, argument of perigee as 0, simulation time as 1 d, set regression coefficient Q = 15, initial ascending node as 0, initial MA as 0, imaging width of a satellite group as 1500 km, imaging width of single satellite as 140 km, and maximum working time of single satellite to orbit single circle as 35 min. During the optimization, it can be observed that the approximation speed of the Pareto front in the first 100 generations is extremely fast. As the number of iteration increases, the variation of the Pareto front gradually decreases and eventually becomes stable. In the final generation of nondominated solutions, we select the individual of f1 = 1.981 and f2 = 9516.482 as the final solution, and the constellation configuration is shown in Fig. 15. The constellation has a total of 891 satellites, of which 81 basic satellites are evenly distributed, with 10 accompanying satellites evenly distributed around each basic satellite. A total of 810 accompanying satellites can achieve collaborative observation of any position outside the polar region within 35 min.
Credit
Space: Science & Technology
Space: Science & Technology
Study reveals new source of the heavy elements
Stellar collapse and explosions distribute gold throughout the universe
COLUMBUS, Ohio – Magnetar flares, colossal cosmic explosions, may be directly responsible for the creation and distribution of heavy elements across the universe, suggests a new study.
For decades, astronomers only had theories about where some of the heaviest elements in nature, like gold, uranium and platinum, come from. But by taking a fresh look at old archival data, researchers now estimate that up to 10% of these heavy elements in the Milky Way are derived from the ejections of highly magnetized neutron stars, called magnetars.
Until recently, astronomers had unwittingly overlooked the role that magnetars, essentially dead remnants of supernovae, might play in early galaxy formation, said Todd Thompson, co-author of the study and a professor of astronomy at The Ohio State University.
“Neutron stars are very exotic, very dense objects that are famous for having really big, very strong magnetic fields,” said Thompson. “They’re close to being black holes, but are not.”
While the origins of heavy elements had long been a quiet mystery, scientists knew that they could only form in special conditions through a method called the r-process (or rapid-neutron capture process), a set of unique and complex nuclear reactions, said Thompson.
Scientists saw this process in action when they detected the collision of two super-dense neutron stars in 2017. This event, captured using NASA telescopes, the Laser Interferometer Gravitational wave Observatory (LIGO) and other instruments, provided the first direct evidence that heavy metals were being created by celestial forces.
But further evidence showed that other mechanisms might be needed to account for all these elements, as neutron star collisions might not produce heavy elements fast enough in the early universe. According to this new study, building on these clues helped Thompson and his collaborators recognize that powerful magnetar flares could indeed serve as a potential ejectors of heavy elements, a finding confirmed by 20-year-old observations of SGR 1806–20, a magnetar flare so bright that some measurements of the event could only be made by studying its reflection off the moon.
By analyzing this magnetar flare event, researchers determined that the radioactive decay of the newly created elements matched up with their theoretical predictions about the timing and types of energies released by a magnetar flare after it ejected heavy r-process elements. The researchers also theorized that magnetar flares produce heavy cosmic rays, extremely high-velocity particles whose physical origin remains unknown.
“I love new ideas about how systems work, how new discoveries work, how the universe works,” Thompson said. “That’s why results like this are really exciting.”
The study was recently published in The Astrophysical Journal Letters.
Magnetars may provide unique insights into galactic chemical evolution, including the formation of exoplanetary systems and their habitability.
Not only do magnetars produce valuable metals like gold and silver that end up on Earth, the supernova explosions that cause them also produce elements like oxygen, carbon and iron that are vital for many other, more complex celestial processes.
“All of that material they eject gets mixed into the next generation of planets and stars,” said Thompson. “Billions of years later, those atoms are incorporated into what could potentially amount to life.”
Altogether, these findings have deep implications for astrophysics, particularly for scientists studying the origin of both heavy elements and fast radio bursts – brief shivers of electromagnetic radio waves from faraway galaxies. Understanding how matter ejects from magnetars could help scientists learn more about them.
Due to their rarity and short duration, magnetar flares can be difficult to observe,
and current space-based telescopes like the James Webb Space Telescope and Hubble don’t have the dedicated abilities needed to detect and study their emission signals. Even more specialized observatories like NASA’s Fermi Gamma-ray Space Telescope can only see the brightest part of gamma-ray flashes from nearby galaxies.
Instead, one proposed NASA mission, the Compton Spectrometer and Imager (COSI), could bolster the team’s work by surveying the Milky Way for energetic events like giant magnetar flares. Though another event like SGR 1806-20 might not occur this century, if a magnetar flare did detonate in our backyard, COSI could be used to better identify the individual elements created from its eruption and allow this team of researchers to confirm their theory about where heavy elements in the universe come from.
“We’re generating a bunch of new ideas about this field, and ongoing observations will lead to even more great connections,” said Thompson.
The study was supported by the National Science Foundation, NASA, the Charles University Grant Agency and the Simons Foundation. Co-authors include Anirudh Patel and Brian D. Metzger from Columbia University, Jakub Cehula from Charles University in Prague, Eric Burns from Louisiana State University and Jared A. Goldberg from the Flatiron Institute.
#
Contact: Todd Thompson, Thompson.1847@osu.edu
Written by: Tatyana Woodall, Woodall.52@osu.edu
Stellar collapse and explosions distribute gold throughout the universe
COLUMBUS, Ohio – Magnetar flares, colossal cosmic explosions, may be directly responsible for the creation and distribution of heavy elements across the universe, suggests a new study.
For decades, astronomers only had theories about where some of the heaviest elements in nature, like gold, uranium and platinum, come from. But by taking a fresh look at old archival data, researchers now estimate that up to 10% of these heavy elements in the Milky Way are derived from the ejections of highly magnetized neutron stars, called magnetars.
Until recently, astronomers had unwittingly overlooked the role that magnetars, essentially dead remnants of supernovae, might play in early galaxy formation, said Todd Thompson, co-author of the study and a professor of astronomy at The Ohio State University.
“Neutron stars are very exotic, very dense objects that are famous for having really big, very strong magnetic fields,” said Thompson. “They’re close to being black holes, but are not.”
While the origins of heavy elements had long been a quiet mystery, scientists knew that they could only form in special conditions through a method called the r-process (or rapid-neutron capture process), a set of unique and complex nuclear reactions, said Thompson.
Scientists saw this process in action when they detected the collision of two super-dense neutron stars in 2017. This event, captured using NASA telescopes, the Laser Interferometer Gravitational wave Observatory (LIGO) and other instruments, provided the first direct evidence that heavy metals were being created by celestial forces.
But further evidence showed that other mechanisms might be needed to account for all these elements, as neutron star collisions might not produce heavy elements fast enough in the early universe. According to this new study, building on these clues helped Thompson and his collaborators recognize that powerful magnetar flares could indeed serve as a potential ejectors of heavy elements, a finding confirmed by 20-year-old observations of SGR 1806–20, a magnetar flare so bright that some measurements of the event could only be made by studying its reflection off the moon.
By analyzing this magnetar flare event, researchers determined that the radioactive decay of the newly created elements matched up with their theoretical predictions about the timing and types of energies released by a magnetar flare after it ejected heavy r-process elements. The researchers also theorized that magnetar flares produce heavy cosmic rays, extremely high-velocity particles whose physical origin remains unknown.
“I love new ideas about how systems work, how new discoveries work, how the universe works,” Thompson said. “That’s why results like this are really exciting.”
The study was recently published in The Astrophysical Journal Letters.
Magnetars may provide unique insights into galactic chemical evolution, including the formation of exoplanetary systems and their habitability.
Not only do magnetars produce valuable metals like gold and silver that end up on Earth, the supernova explosions that cause them also produce elements like oxygen, carbon and iron that are vital for many other, more complex celestial processes.
“All of that material they eject gets mixed into the next generation of planets and stars,” said Thompson. “Billions of years later, those atoms are incorporated into what could potentially amount to life.”
Altogether, these findings have deep implications for astrophysics, particularly for scientists studying the origin of both heavy elements and fast radio bursts – brief shivers of electromagnetic radio waves from faraway galaxies. Understanding how matter ejects from magnetars could help scientists learn more about them.
Due to their rarity and short duration, magnetar flares can be difficult to observe,
and current space-based telescopes like the James Webb Space Telescope and Hubble don’t have the dedicated abilities needed to detect and study their emission signals. Even more specialized observatories like NASA’s Fermi Gamma-ray Space Telescope can only see the brightest part of gamma-ray flashes from nearby galaxies.
Instead, one proposed NASA mission, the Compton Spectrometer and Imager (COSI), could bolster the team’s work by surveying the Milky Way for energetic events like giant magnetar flares. Though another event like SGR 1806-20 might not occur this century, if a magnetar flare did detonate in our backyard, COSI could be used to better identify the individual elements created from its eruption and allow this team of researchers to confirm their theory about where heavy elements in the universe come from.
“We’re generating a bunch of new ideas about this field, and ongoing observations will lead to even more great connections,” said Thompson.
The study was supported by the National Science Foundation, NASA, the Charles University Grant Agency and the Simons Foundation. Co-authors include Anirudh Patel and Brian D. Metzger from Columbia University, Jakub Cehula from Charles University in Prague, Eric Burns from Louisiana State University and Jared A. Goldberg from the Flatiron Institute.
#
Contact: Todd Thompson, Thompson.1847@osu.edu
Written by: Tatyana Woodall, Woodall.52@osu.edu
Journal
The Astrophysical Journal Letters
The Astrophysical Journal Letters
DOI
Article Title
Direct Evidence for r-process Nucleosynthesis in Delayed MeV Emission from the SGR 1806–20 Magnetar Giant Flare
Direct Evidence for r-process Nucleosynthesis in Delayed MeV Emission from the SGR 1806–20 Magnetar Giant Flare
Janice R. Lachance, J.D., FASAE selected for top position of global earth and space science association
WASHINGTON — The American Geophysical Union Board of Directors and Executive Search Committee is pleased to announce AGU’s new Executive Director and CEO will be Janice R. Lachance, J.D., Fellow of the American Society of Association Executives and the National Academy of Public Administration.
“Janice has served as an exceptional interim Executive Director and CEO during the last two years, said AGU President Brandon Jones, Ph.D. “She has demonstrated the leadership qualities and skills required to lead our complex, global scientific enterprise into the next decade.”
Lachance is an attorney, a highly respected association executive, and a trusted advisor to several U.S. Presidents and elected officials. Since joining AGU eight years ago, Lachance’s achievements in AGU senior leadership positions include leading the reconstruction of the headquarters building into Washington, D.C.’s first net-zero energy renovation of a commercial building and overseeing several departments and programs. She also led two major elements of AGU’s strategic plan: growing AGU into a truly global association and developing a strategy to evaluate potential global partners. Lachance’s overall strategic mindset has ensured that AGU programs and policies rise above political boundaries and share AGU values, including the commitment to advocating for science’s role in benefiting society and the planet. This approach opened the way for robust partnerships across a variety of global science societies and many divisions of the United Nations.
The Search Committee was unanimous in its decision to advance Lachance, and the Board had total confidence in Lachance and her extensive, successful policy-focused career and leadership qualities. Like the Search Committee, the members of the Board were unanimous in their vote to offer Lachance the ED/CEO position, which she accepted.
“I aim to serve as a voice for hope and truth in the sciences,” said Lachance. “I am committed to working on behalf of AGU scientists and leading our staff in this current political climate, and will focus on our future well-being. I will partner with AGU’s volunteer leaders to think ten years ahead to create an AGU that is as successful as today and positioned as a leader in reinvigorating the scientific enterprise.”
Lisa J. Graumlich, Ph.D., who chaired the Search Committee, said, “Janice is the right leader to guide AGU during these challenging political times. She is smart, savvy, and leaning into the unusual circumstances to serve as a beacon of hope for AGU members and our partners. She has demonstrated a strong intellect, capacity, and commitment to be our scientific champion. She is dedicated to leading AGU and the global scientific enterprise into a more sustainable and brighter future.”
“I am particularly pleased that Janice Lachance has accepted the responsibility of becoming CEO of the AGU,” said Guy P. Brasseur, Ph.D., a member of the Search Committee. “
Janice has an excellent reputation as a fair and effective leader whose interventions are always balanced and meaningful. At the same time, she has shown her determination to support rational and open science involving a wide range of female and male researchers in a multidisciplinary, intercultural, and international framework. At a time when academic freedom is increasingly under threat, the AGU must stand strong to defend the geophysical sciences and show that fundamental research is the keystone of our future and the foundation of our future economic development.”
Before Lachance’s work in the nonprofit sector, she was nominated by President Clinton and unanimously confirmed by the U.S. Senate to serve as the Cabinet-ranked Director of the U.S. Office of Personnel Management, where she managed policy and programmatic leadership of the nation’s 2.1-million-member civil service. Prior to becoming Director, Janice served as OPM’s Director of Communications and Policy, Chief of Staff, and Deputy Director. Lachance has also served as Chair of the National Labor-Management Partnership Council, a member of the President’s Management Council, a Commissioner of the White House Fellows program, and a member of the President’s Council on the 2000 Presidential Transition.
More recently, Lachance held two appointments within the Biden-Harris Administration. She has worked in leadership positions with the American Library Association and the Better Business Bureau’s Foundation and as CEO of the Special Library Association.
On top of her dynamic career, Lachance is also an attorney who is admitted to practice law in the State of Maine, the District of Columbia, and the United States Supreme Court. This legal lens helps shape her thinking and approach to tackling tough issues.
Lachance will become AGU’s ED/CEO immediately. Media questions can be directed to: Josh Weinberg at news@agu.org. AGU member questions should be sent to AGU President Brandon Jones, Ph.D., at President@AGU.org or to the search committee chair, Lisa J. Graumlich, Ph.D., AGU immediate past president, at pastpresident@agu.org.
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The American Geophysical Union (www.agu.org) is a global community supporting more than half a million scientists, advocates, and professionals in Earth and space sciences. Through broad and inclusive partnerships, AGU aims to advance discovery and solution science that accelerate knowledge and create solutions that are ethical, unbiased and respectful of communities and their values. Our programs include serving as a scholarly publisher, convening virtual and in-person events and providing career support. We live our values in everything we do, such as our net zero energy renovated building in Washington, D.C. and our Ethics and Equity Center, which fosters a diverse and inclusive geoscience community to ensure responsible conduct.
WASHINGTON — The American Geophysical Union Board of Directors and Executive Search Committee is pleased to announce AGU’s new Executive Director and CEO will be Janice R. Lachance, J.D., Fellow of the American Society of Association Executives and the National Academy of Public Administration.
“Janice has served as an exceptional interim Executive Director and CEO during the last two years, said AGU President Brandon Jones, Ph.D. “She has demonstrated the leadership qualities and skills required to lead our complex, global scientific enterprise into the next decade.”
Lachance is an attorney, a highly respected association executive, and a trusted advisor to several U.S. Presidents and elected officials. Since joining AGU eight years ago, Lachance’s achievements in AGU senior leadership positions include leading the reconstruction of the headquarters building into Washington, D.C.’s first net-zero energy renovation of a commercial building and overseeing several departments and programs. She also led two major elements of AGU’s strategic plan: growing AGU into a truly global association and developing a strategy to evaluate potential global partners. Lachance’s overall strategic mindset has ensured that AGU programs and policies rise above political boundaries and share AGU values, including the commitment to advocating for science’s role in benefiting society and the planet. This approach opened the way for robust partnerships across a variety of global science societies and many divisions of the United Nations.
The Search Committee was unanimous in its decision to advance Lachance, and the Board had total confidence in Lachance and her extensive, successful policy-focused career and leadership qualities. Like the Search Committee, the members of the Board were unanimous in their vote to offer Lachance the ED/CEO position, which she accepted.
“I aim to serve as a voice for hope and truth in the sciences,” said Lachance. “I am committed to working on behalf of AGU scientists and leading our staff in this current political climate, and will focus on our future well-being. I will partner with AGU’s volunteer leaders to think ten years ahead to create an AGU that is as successful as today and positioned as a leader in reinvigorating the scientific enterprise.”
Lisa J. Graumlich, Ph.D., who chaired the Search Committee, said, “Janice is the right leader to guide AGU during these challenging political times. She is smart, savvy, and leaning into the unusual circumstances to serve as a beacon of hope for AGU members and our partners. She has demonstrated a strong intellect, capacity, and commitment to be our scientific champion. She is dedicated to leading AGU and the global scientific enterprise into a more sustainable and brighter future.”
“I am particularly pleased that Janice Lachance has accepted the responsibility of becoming CEO of the AGU,” said Guy P. Brasseur, Ph.D., a member of the Search Committee. “
Janice has an excellent reputation as a fair and effective leader whose interventions are always balanced and meaningful. At the same time, she has shown her determination to support rational and open science involving a wide range of female and male researchers in a multidisciplinary, intercultural, and international framework. At a time when academic freedom is increasingly under threat, the AGU must stand strong to defend the geophysical sciences and show that fundamental research is the keystone of our future and the foundation of our future economic development.”
Before Lachance’s work in the nonprofit sector, she was nominated by President Clinton and unanimously confirmed by the U.S. Senate to serve as the Cabinet-ranked Director of the U.S. Office of Personnel Management, where she managed policy and programmatic leadership of the nation’s 2.1-million-member civil service. Prior to becoming Director, Janice served as OPM’s Director of Communications and Policy, Chief of Staff, and Deputy Director. Lachance has also served as Chair of the National Labor-Management Partnership Council, a member of the President’s Management Council, a Commissioner of the White House Fellows program, and a member of the President’s Council on the 2000 Presidential Transition.
More recently, Lachance held two appointments within the Biden-Harris Administration. She has worked in leadership positions with the American Library Association and the Better Business Bureau’s Foundation and as CEO of the Special Library Association.
On top of her dynamic career, Lachance is also an attorney who is admitted to practice law in the State of Maine, the District of Columbia, and the United States Supreme Court. This legal lens helps shape her thinking and approach to tackling tough issues.
Lachance will become AGU’s ED/CEO immediately. Media questions can be directed to: Josh Weinberg at news@agu.org. AGU member questions should be sent to AGU President Brandon Jones, Ph.D., at President@AGU.org or to the search committee chair, Lisa J. Graumlich, Ph.D., AGU immediate past president, at pastpresident@agu.org.
###
The American Geophysical Union (www.agu.org) is a global community supporting more than half a million scientists, advocates, and professionals in Earth and space sciences. Through broad and inclusive partnerships, AGU aims to advance discovery and solution science that accelerate knowledge and create solutions that are ethical, unbiased and respectful of communities and their values. Our programs include serving as a scholarly publisher, convening virtual and in-person events and providing career support. We live our values in everything we do, such as our net zero energy renovated building in Washington, D.C. and our Ethics and Equity Center, which fosters a diverse and inclusive geoscience community to ensure responsible conduct.
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