As a leading climate scientist, Paola Arias doesn’t need to look far to see the world changing. Shifting rain patterns threaten water supplies in her home city of Medellín, Colombia, while rising sea levels endanger the country’s coastline. She isn’t confident that international leaders will slow global warming or that her own government can handle the expected fallout, such as mass migrations and civil unrest over rising inequality. With such an uncertain future, she thought hard several years ago about whether to have children.
A Nature survey reveals that many authors of the latest IPCC climate-science report--including Paul N. Edwards--are anxious about the future and expect to see catastrophic changes in their lifetimes.
Unless you’ve been living under a rock, you’re probably familiar with the Sixth Assessment Report released by the International Panel for Climate Change (IPCC) in August 2021. According to the IPCC itself, the report addresses “the most up-to-date physical understanding of the climate system and climate change, bringing together the latest advances in climate science, and combining multiple lines of evidence from paleoclimate, observations, process understanding, and global and regional climate simulations.”
A Lead Author of the IPCC Sixth Assessment Report, Paul N. Edwards, talks about knowledge infrastructures and geoengineering, as well as policy and visual aspects of the landmark report on climate change.
What can the past teach us about the future of the global weather enterprise? On October 12th, William J. Perry Fellow Paul Edwards discussed vital points in the history of weather forecasting and climate science at the Global Weather Enterprise Conference in Amsterdam.
The Global Weather Enterprise Conference brought together representatives of the UN World Meteorological Organization, national weather services, academic meteorologists, and private sector groups to identify business and operating models for data generation, supply, and sharing that would ensure the sustainability and progression of the global data network.
Edwards’ keynote address, “Meteorology as an Information Infrastructure: Lessons from History,” followed on data transmission processes throughout the 20th century and introduced the opportunities and risks as analysis moves from added-value data products to infrastructure provision.
Abstract: Effective climate risk management requires robust quantification of the probability of different kinds of hazards, such as heat waves, droughts, floods, and severe storms. As a result, there has been increasing interest in the extent to which historical global warming has influenced the occurrence and severity of individual extreme climate events. However, although trends in the extremes of the seasonal- and daily-scale distributions of climate records have been analyzed for many years, quantifying the contribution of observed global warming to individual events that are unprecedented in the observed record presents a particular scientific challenge. I will describe a framework for leveraging observations and large climate model ensembles to quantify the influence of observed global warming on the probability of unprecedented extreme events. This approach is grounded on three tenets: (1) Focus on understanding the physical causes of the individual event; (2) Use formal uncertainty quantification to test the probability of those physical conditions occurring in the current climate; and (3) Use formal hypothesis testing to compare the probability of those physical conditions occurring in the current climate and a climate without human influence. My group has applied our analysis to a number of different climate variables from a number of individual events, including temperature, precipitation, soil moisture, and atmospheric circulation patterns. Together, this work has shown that global warming can influence the risk of extreme events that are unprecedented in historical experience, particularly by altering the probability of the physical conditions that are responsible for the event. In addition, given the widespread public interest in “real time” attribution, the prospects for operational attribution analysis will also be discussed.
About the Speaker: Noah Diffenbaugh is a Professor and Kimmelman Family Senior Fellow at Stanford University. He studies the climate system, including impacts on agriculture, water resources, and human health. He is currently Editor-in-Chief of Geophysical Research Letters. He has served as an IPCC Lead Author, and has provided scientific expertise to the White House, the Governor of California, and U.S. Congressional offices. Recognitions include the Holton Award from the American Geophysical Union and a CAREER award from the National Science Foundation.
Encina Hall, 2nd floor
Noah S. Diffenbaugh
Professor, School of Earth, Energy and Environmental Sciences
Stanford University
Stanford researchers working with the U.S. Navy’s Marine Mammal Program in San Diego have discovered a startling variety of newly-recognized bacteria living inside the highly trained dolphins that the Navy uses to protect its ships and submarines, find submerged sea mines and detect underwater intruders. They found similar types of bacteria in wild dolphins as well.
“About three quarters of the bacterial species we found in the dolphins’ mouths are completely new to us,” said David Relman, Stanford professor of microbiology and medicine, and co-author of a paper published in the journal Nature Communications on Wednesday.
A U.S. Navy dolphin opens its mouth for a swab to collect bacterial samples.
These previously unknown bacteria represent “whole new realms of life,” according to Relman.
“Bacteria are among the most well-studied microbes, so it was surprising to discover the degree to which the kinds of bacteria we found were types that have never been described,” he said. “What novelty means is not just new names of species, families, classes or phyla…there’s reason to believe that along with this taxonomic novelty, there’s functional novelty.”
The U.S. Navy has been training dolphins and sea lions to carry out defensive military missions from their bases in San Diego and elsewhere since the early 1960s.
Over the years, it has also funded scientific research and become the single largest contributor to the scientific literature on marine mammals, producing more than 800 publications, according to the Navy.
Relman started working with the Navy more than 15 years ago to identify bacteria suspected of causing stomach ulcers in their dolphins.
His latest project to catalog the bacterial communities (or microbiota) living inside the dolphins began when the Navy asked him to help develop a probiotic bacterial strain that could keep their dolphins healthy, or help sick dolphins get better.
Navy trainers took regular swabs from the dolphins’ mouths and rectal areas, using what looked like a Q-tip, and shipped the samples to Stanford on dry ice for analysis.
Stanford researchers analyzed oral, rectal and gastric samples from the U.S. Navy's dolphins and sea lions, as well as samples from the dolphins' blowholes and the surrounding water.
They also collected samples of the air the dolphins exhaled from their blowholes (known as “chuff”) onto sterile filter paper, as well as samples of their gastric juices using a tube that the dolphins would swallow on command, and for comparison, bacteria from the surrounding water.
The study found a similar amount of diversity and novelty in bacterial samples taken from wild dolphins living in Sarasota Bay off the west coast of Florida, although there were slight differences in the bacteria from the dolphins’ mouths.
Relman said he hoped to develop a profile of the normal microbial communities in healthy dolphins and other marine mammals, so that scientists could detect any early change that might signify an imminent disease, or health problems caused by climate change and ocean warming.
“There’s a lot of concern about the changing conditions of the oceans and what the impact could be on the health of wild marine mammals,” Relman said. “We would love to be able to develop a diagnostic test that would tell us when marine mammals are beginning to suffer from the ill effects of a change in their environment.”
The research could help solve other mysteries, such as how dolphins digest their food, even though they swallow fish whole without chewing them.
The key could be a unique bacterial group that’s also been identified in an endangered species of freshwater dolphins living in China’s Yangtze River, said Elisabeth Bik, a research associate at the Stanford Department of Medicine and lead author on the paper.
“It’s a very intriguing bacterial group that nobody has seen before in any other terrestrial animal group,” said Bik. “I would really love to know more about those bacteria and sequence their genomes to understand more about their functional capacity.”
Zak, a 375-pound California sea lion, shows his teeth during a training swim. Zak has been trained to locate swimmers near piers, ships, and other objects in the water considered suspicious and a possible threat to military forces in the area.
The study also examined oral, gastric and rectal samples from the Navy’s trained sea lions.
“The sea lions and dolphins are kept at the same facility, they’re fed exactly the same fish, and they’re swimming in the same water…but they’re very, very different in terms of microbiota,” Bik said.
Unlike dolphins, sea lions share many common types of bacteria with their terrestrial cousins.
“Sea lions weren’t that different from other carnivores like dogs and cats,” Bik said. “They’re evolutionarily related to them, and their microbiota looks very similar to those animals. But dolphins don’t really have a terrestrial mammal that’s closely related, and their microbiota looks very different from anything else that people have seen.”
Relman said his team was planning on expanding their study to include other marine mammals such as sea otters, killer whales, baleen whales, grey whales, harbor seals, elephant seals and manatees. Their purpose, in part, is to understand how life in the sea, over the millions of years since the return of mammals, may have shaped the structure of their microbial communities and the roles they play in marine mammal health.
They’re already working to analyze more than 80 samples of killer whale stool that the U.S. National Oceanic and Atmospheric Administration has gathered with the help of specially trained sniffer dogs, which stand on the bow of their boats and point to fresh killer whale feces before it sinks.
The California Department of Fish and Wildlife is contributing samples from the sea otters and seals it studies as part of its conservation, ecological, and monitoring programs.
And the Marine Mammal Center in Sausalito, which is the West Coast’s largest rescue and rehabilitation facility for marine mammals, is sending samples from the seals in its care.
Relman said the research could help scientists begin to answer fundamental questions about life in the ocean.
“Marine mammals remain one of the more poorly understood habitats for studying microbial life, and there would be lots of reasons for thinking that these are important environments to study, in part because of the relevance for the health of these marine mammals, but also because they represent a view into what it means to live in the sea and the nature of our relationship with this vast aspect of our environment,” Relman said.
Collaborators and co-authors on this study included Stephanie Venn-Watson and Kevin Carlin from the National Marine Mammal Foundation, and Eric Jensen from the Space and Naval Warfare Systems Center Pacific, in San Diego.
Forty-eight national security and foreign policy leaders urged U.S. government and businesses to take action to fight climate change in a statement released by the Partnership for a Secure America. Thomas Fingar, a distinguished fellow in the Freeman Spogli Institute for International Studies, is a signatory. The statement can be accessed by clicking here.
When we consider national security, we typically think of protecting our borders, securing data and preventing disease and conflict. Winning wars.
The U.S. military is increasingly thinking about the final frontier as the last stand for strategic defense.
“Space is no longer the sanctuary it was 30 years ago; it is becoming increasingly congested, contested and competitive,” said Air Force Lt. Gen. John “Jay” Raymond, commander of the 14th Air Force and the Joint Functional Component Command for Space, within the U.S. Strategic Command.
“Our ultimate goal is to promote the safe and responsible use of space while we execute our mission of supporting the war-fighter through delivering space capabilities,” said Raymond, who recently invited a dozen scholars from CISAC and the Freeman Spogli Institute for International Studies to Vandenberg Air Force Base.
Raymond visited CISAC last year to open a dialogue on policy and strategy among Stanford scholars and the U.S. Strategic Command, one of nine unified commands in the Department of Defense. Raymond’s mandate includes space surveillance and control.
CISAC has had a long partnership with USSTRATCOM headquarters in Omaha, Neb., with fellows visiting officers there each year. Raymond is now looking to Stanford for a policy partnership with his commanders at the Air Force base on the California coast between San Francisco and Los Angeles.
“To continue to be the best in this business we have to constantly assess our current policies and operations while always keeping an eye toward future challenges,” Raymond said. “This is where a relationship with CISAC is invaluable. I saw this as a phenomenal opportunity to provide the fellows insight into the real-world challenges we are facing in the space domain – and to help support, stimulate and develop their academic pursuits.”
CISAC Co-Directors Amy Zegart and David Relman are taking the general up on the proposal. Zegart led the delegation that toured the Joint Space Operations Center and then held senior-level policy and strategy talks with two dozen officers and NASA officials.
The off-the-record talks were lively and frank. The sessions focused on foreign counter-space threats, space policy efforts with China and Russia, the growing problem of space debris and the policy debate over the use of cube satellites.
“We naturally think about national security challenges on land, under water, in the air, and even in cyberspace,” said Zegart, who is also a senior fellow at the Hoover Institution. “But space is playing an increasingly vital role in international security, whether it's the 23,000 pieces of debris the U.S. tracks every day that could hit vital satellites, or deliberate moves by some nations to develop counter-space capabilities. In many ways, space really is the final frontier in the international security landscape.”
Space Debris
The Joint Space Operations Center currently tracks 23,000 objects in orbit; only 1,400 of which are active payloads. Another estimated 500,000 pieces of orbital debris are too small to track. Events such as the Chinese anti-satellite missile test in 2007 and the Iridium-Cosmos collision in 2009 produced thousands of pieces of debris at already congested altitudes.
European Space Agency
“Debris in space, particularly at lower orbits, travels upwards of 17,000 mph and presents a significant danger to space assets,” Raymond said. “Last year alone, satellites operators around the world executed 121 collision-avoidance maneuvers to avoid hitting debris.”
The participants also discussed the fine balance of militarily protecting space systems against disruption, while allowing the open use of space in a globally connected economy.
U.S. Strategic Commander Admiral Cecil B. Haney spent a day at CISAC and Hoover last year and touched on the importance of space in the nation's 21st century deterrence program. He recently told a House Armed Services subcommittee that China space capabilities are now threatening U.S. strategic satellite systems. He noted Beijing conducted a test of a missile-fire, anti-satellite kill vehicle as recently as last summer.
As more countries develop space capabilities, the problem will grow, the admiral said, according to a Department of Defense news release on Feb. 6.
North Korea has been busy upgrading launch facilities, Haney said, and Iran just successfully launched a satellite into orbit after a string of failures.
Countries also are working to take away America’s strategic advantage in space, Haney said, with China and Russia warranting the most attention.
“Both countries have advanced directed-energy capabilities that could be used to track or blind satellites, disrupting key operations, and both have demonstrated the ability to perform complex maneuvers in space,” he said. Multiple countries already are frequently using military jamming capabilities designed to interfere with satellite communications and global positioning systems.
Rod Ewing, a senior FSI fellow and Frank Stanton Professor in Nuclear Security at CISAC, said after the meeting at Vandenberg that it was important to keep dialogue open with other nations about joint space operations and agreements.
“Of particular interest to me was the intersection of space command issues with those of the space programs of other countries,” Ewing said, “particularly the effort to keep track of space debris.”
U.S. Strategic Command currently has more than 50 Space Situational Awareness data-sharing agreements with partner nations, intergovernmental organizations and commercial entities worldwide. The most recent one was signed with the European Space Agency to provide the ESA with more timely and better data about satellite positions and radio-frequency details for planned orbit maneuvers.
Stephen Krasner, a senior fellow at FSI and a professor of international relations, is working on a paper about governance in space for the European Space Policy Institute and traveled with the Stanford group. He said few Americans realize how much the United States contributes to making the benefits of space available to all.
“The work of the space operations center and U.S. Strategic Command – in particular its tracking of all objects in space above 10cm and its commitment to notify all states of potential collisions – is one more example of the exceptional capacity of the American military and the contributions that the United States makes to providing global public goods.”
CubeSats: The democratization of space and proliferation of debris
Another space conundrum is the rapid growth of 3-pound satellites called CubeSats. Cal Poly and Stanford University developed specifications for the cube-shaped satellites to help graduate students perform space experiments and exploration.
There currently are some 160 CubeSats in space; another 2,000 to 2,750 are expected to launch by 2020. They are built to remain in orbit for more than 25 year, before falling back to Earth. Since 2005, the nanosatellites have been involved in more than 360,000 close approaches of less than 5 kilometers with other orbiting objects, according to a study by the University of Southampton.
“Last year alone over 100 cubesats were launched into orbit,” Raymond said. “This trend is stressing our ability to have domain awareness.”
Climate Satellite Launch
Raymond had invited the Stanford group to observe the launch of a NASA satellite that is collecting data to provide the most accurate high-resolution maps of soil moisture ever obtained. The three-year Soil Moisture Active Passive mission will map soil moisture around the world.
Though the launch was scrubbed the day the Stanford group visited, due to high winds, it went off two days later and the climate satellite is currently in orbit.
NASA is running a smart Twitter campaign @NASASMAP, which follows the work of the first Earth-observing satellite designed to collect data on saturated ground for climate scientists, weather forecasters, agricultural and water resource managers, disease and prevention experts, as well as emergency planners and policymakers.
“High-resolution, space-based measurements of soil moisture will give scientists a new capability to observe and predict natural hazards of extreme weather, climate change, floods and droughts, and will help reduce uncertainties in our understanding of Earth’s water, energy and carbon cycles,” Raymond said.
Matthew Daniels was a predoctoral fellow at CISAC last year and is now an engineer at NASA’s Ames Research Center who studies new mission concept for Earth-orbit satellites. He contributed greatly to the closed-door talks.
“I think it’s really important for engineers outside the U.S. government to talk to military and national security leaders about space projects," said Daniels, who helped create NASA-DARPA partnerships on new space projects.
“National security space projects are facing some big decisions in the years ahead,” Daniels said, such as whether to keep building the large, consolidated satellites or move some capabilities toward smaller distributed systems.
“These are decisions that involve a combination of physics, engineering, military choices and national policy," he said. “So I think it’s really important for groups like CISAC to come and have conversations with the military leadership."
Climate change can reasonably be expected to increase the frequency and intensity of a variety of potentially disruptive environmental events-slowly at first, but then more quickly. It is prudent to expect to be surprised by the way in which these events may cascade, or have far-reaching effects. Over the coming decade, some climate-related events will produce consequences that exceed the capacity of affected societies or global systems to manage; these may have global security implications. Although focused on events outside the United States, Climate and Social Stress: Implications for Security Analysis recommends a range of research and policy actions to create a whole-of-government approach to increasing understanding of complex and contingent connections between climate and security, and to inform choices about adapting to and reducing vulnerability to climate change.
This study quantifies worldwide health effects of the Fukushima Daiichi nuclear accident on 11 March 2011. Effects are quantified with a 3-D global atmospheric model driven by emission estimates and evaluated against daily worldwide Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) measurements and observed deposition rates. Inhalation exposure, ground-level external exposure, and atmospheric external exposure pathways of radioactive iodine-131, cesium-137, and cesium-134 released from Fukushima are accounted for using a linear no-threshold (LNT) model of human exposure. Exposure due to ingestion of contaminated food and water is estimated by extrapolation. We estimate an additional 130 (15–1100) cancer-related mortalities and 180 (24–1800) cancer-related morbidities incorporating uncertainties associated with the exposure–dose and dose–response models used in the study. Sensitivities to emission rates, gas to particulate I-131 partitioning, and the mandatory evacuation radius around the plant may increase upper bound mortalities and morbidities to 1300 and 2500, respectively. Radiation exposure to workers at the plant is projected to result in 2 to 12 morbidities. An additional 600 mortalities have been reported due to mandatory evacuations. A hypothetical accident at the Diablo Canyon Power Plant in California, USA with identical emissions to Fukushima may cause 25% more mortalities than Fukushima despite California having one fourth the local population density, due to differing meteorological conditions.
Mark Z. Jacobson is Director of the Atmosphere/Energy Program and Professor of Civil and Environmental Engineering at Stanford University. He is also a Senior Fellow of the Woods Institute for the Environment and Senior Fellow of the Precourt Institute for Energy. He received a B.S. in Civil Engineering with distinction, an A.B. in Economics with distinction, and an M.S. in Environmental Engineering from Stanford University, in 1988. He received an M.S. in Atmospheric Sciences in 1991 and a PhD in Atmospheric Sciences in 1994 from UCLA. He has been on the faculty at Stanford since 1994. His work relates to the development and application of numerical models to understand better the effects of energy systems and vehicles on climate and air pollution and the analysis of renewable energy resources. He has published two textbooks of two editions each and ~130 peer-reviewed scientific journal articles. He received the 2005 American Meteorological Society Henry G. Houghton Award for “significant contributions to modeling aerosol chemistry and to understanding the role of soot and other carbon particles on climate.” He has served on the Energy Efficiency and Renewables Advisory Committee to the U.S. Secretary of Energy.
CISAC Conference Room
Mark Jacobson
Professor of Civil and Environmental Engineering
Speaker
Stanford University
A U.S. Navy dolphin opens its mouth for a swab to collect bacterial samples.
Stanford researchers analyzed oral, rectal and gastric samples from the U.S. Navy's dolphins and sea lions, as well as samples from the dolphins' blowholes and the surrounding water.
Zak, a 375-pound California sea lion, shows his teeth during a training swim. Zak has been trained to locate swimmers near piers, ships, and other objects in the water considered suspicious and a possible threat to military forces in the area.
European Space Agency