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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."

To predict how agriculture will be affected by future climate change, scientists often rely on a single crop model – a computer simulation of how a specific crop’s yield responds to temperature changes. By combining 30 such models into a single study, and comparing each model against data from existing experimental wheat fields around the world, a team of researchers including Stanford professor David Lobell have developed a more powerful and accurate way to predict future wheat yields.

In a new analysis published in Nature Climate Change, the team’s results support previous work suggesting that wheat yields around the world are sensitive to rising temperatures. Using the new method of analysis, the team estimates an average six percent future yield loss for every one degree Celsius rise in global mean temperature.

“Combining 30 models gives us a much greater ability to predict future impacts and understand past impacts,” said Lobell. “This is a clear step forward.”

Lobell is professor of environmental earth system science in the School of Earth Science at Stanford and the deputy director of the Center on Food Security and the Environment. He is a senior fellow at the Stanford Woods Institute for the Environment and at the Freeman Spogli Institute for International Studies.

The estimated six percent yield loss for every degree increase is equivalent to about a quarter of the current volume of wheat traded globally in 2013. Yields at some sites, notably those in Mexico, Brazil, India and Sudan, show simulated wheat yield losses of more than 20 percent - in Sudan’s case, more than 50 percent - under a scenario in which global mean temperature rises by two degrees Celsius.

With higher temperatures also comes an increase in the variability of wheat yields, both by location and between years. More fluctuation in wheat yields could mean greater global price volatility for the staple crop.

Approximately 70 percent of the wheat produced today is grown either on irrigated plots or in rainy regions. The research team accounted for this factor by focusing its simulations on multiple regional-specific varieties of wheat that are commonly grown under these conditions.

The new paper includes several suggestions for avoiding some of the predicted yield losses. For example, some varieties of wheat are more heat tolerant than others, and farmers in the places hardest hit by rising temperatures could switch varieties to capitalize on this heat resistance. The effects of rising temperatures could also be managed, in part, by adjusting sowing and harvesting dates, or changing the way fertilizers are applied to crops.

Contact: David Lobell, dlobell@stanford.edu

In a recent speech, Stanford professor Rosamond Naylor examined the wide range of challenges contributing to global food insecurity, which Naylor defined as a lack of plentiful, nutritious and affordable food. Naylor's lecture, titled "Feeding the World in the 21st Century," was part of the quarterly Earth Matters series sponsored by Stanford Continuing Studies and the Stanford School of Earth Sciences. Naylor, a professor of Environmental Earth System Science and director of the Center on Food Security and the Environment at Stanford, is also a professor (by courtesy) of Economics, and the William Wrigley Senior Fellow at the Freeman Spogli Institute for International Studies and the Stanford Woods Institute for the Environment.

"One billion people go to bed day in and day out with chronic hunger," said Naylor. The problem of food insecurity, she explained, goes far beyond food supply. "We produce enough calories, just with cereal crops alone, to feed everyone on the planet," she said. Rather, food insecurity arises from a complex and interactive set of factors including poverty, malnutrition, disease, conflict, poor governance and volatile prices. Food supply depends on limited natural resources including water and energy, and food accessibility depends on government policies about land rights, biofuels, and food subsidies. Often, said Naylor, food policies in one country can impact food security in other parts of the world. Solutions to global hunger must account for this complexity, and for the "evolving" nature of food security.

As an example of this evolution, Naylor pointed to the success of China and India in reducing hunger rates from 70 percent to 15 percent within a single generation. Economic growth was key, as was the "Green Revolution," a series of advances in plant breeding, irrigation and agricultural technology that led to a doubling of global cereal crop production between 1970 and 2010. But Naylor warned that the success of the Green Revolution can lead to complacency about present-day food security challenges. China, for example, sharply reduced hunger as it underwent rapid economic growth, but now faces what Naylor described as a "second food security challenge" of micronutrient deficiency. Anemia, which is caused by a lack of dietary iron and which Naylor said is common in many rural areas of China, can permanently damage children's cognitive development and school performance, and eventually impede a country’s economic growth.

Hunger knows no boundaries

Although hunger is more prevalent in the developing world, food insecurity knows no geographic boundaries, said Naylor. Every country, including wealthy economies like the United States, struggles with problems of food availability, access, and nutrition. "Rather than think of this as 'their problem' that we don't need to deal with, really it's our problem too," Naylor said.

She pointed out that one in five children in the United States is chronically hungry, and 50 million Americans receive government food assistance. Many more millions go to soup kitchens every night, she added. "We are in a precarious position with our own food security, with big implications for public health and educational attainment," Naylor said. A major paradox of the United States' food security challenge is that hunger increasingly coexists with obesity. For the poorest Americans, cheap food offers abundant calories but low nutritional value. To improve the health and food security of millions of Americans, "linking policy in a way that can enhance the incomes of the poorest is really important, and it's the hard part,” she said.” It's not easy to fix the inequality issue."

Success stories

When asked whether there were any "easy" decisions that the global community can agree to, Naylor responded, "What we need to do for a lot of these issues is pretty clear, but how we get after it is not always agreed upon." She added, "But I think we've seen quite a few success stories," including the growing research on climate resilient crops, new scientific tools such as plant genetics, improved modeling techniques for water and irrigation systems, and better knowledge about how to use fertilizer more efficiently. She also said that the growing body of agriculture-focused climate research was encouraging, and that Stanford is a leader on this front.

Naylor is the editor and co-author of The Evolving Sphere of Food Security, a new book from Oxford University Press. The book features a team of 19 faculty authors from 5 Stanford schools including Earth science, economics, law, engineering, medicine, political science, international relations, and biology. The all-Stanford lineup was intentional, Naylor said, because the university is committed to interdisciplinary research that addresses complex global issues like food security, and because "agriculture is incredibly dominated by policy, and Stanford has a long history of dealing with some of these policy elements. This is the glue that enables us to answer really challenging questions."