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Integrated assessment models generate climate change mitigation scenarios consistent with global temperature targets. To limit warming to 2 °C, cost-effective mitigation pathways rely on extensive deployments of CO2 removal (CDR) technologies, including multi-gigatonne yearly CDR from the atmosphere through bioenergy with carbon capture and storage (BECCS) and afforestation/reforestation. While these assumed CDR deployments keep ambitious temperature targets in reach, the associated rates of land-use transformation have not been evaluated. Here, we view implied integrated-assessment-model land-use conversion rates within a historical context. In scenarios with a likely chance of limiting warming to 2 °C in 2100, the rate of energy cropland expansion supporting BECCS proceeds at a median rate of 8.8 Mha yr−1 and 8.4% yr−1. This rate exceeds—by more than threefold—the observed expansion of soybean, the most rapidly expanding commodity crop. In some cases, mitigation scenarios include abrupt reversal of deforestation, paired with massive afforestation/reforestation. Historical land-use transformation rates do not represent an upper bound for future transformation rates. However, their stark contrast with modelled BECCS deployment rates implies challenges to explore in harnessing—or presuming the ready availability of—large-scale biomass-based CDR in the decades ahead. Reducing BECCS deployment to remain within these historical expansion rates would mean either the 2 °C target is missed or additional mitigation would need to occur elsewhere.

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Christopher B. Field
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Stanford scholars debate whether the Iran nuclear deal can withstand U.S. withdrawal, if a revitalized nuclear program is possible and what a new deal would look like.

Following the announcement of the U.S. withdrawal from the Iran deal, three Stanford scholars consider what it means for American foreign policy and diplomacy.

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Stanford scholars debate how the Trump administration’s decision on Iran will affect foreign relations. (Image credit: ruskpp / Getty Images)

In 2015, the Joint Comprehensive Plan of Action – known as the Iran nuclear deal, or JCPOA – was agreed between Iran and the U.S., United Kingdom, France, Germany, China and Russia. The international agreement limited Iran’s nuclear activities in exchange for a reprieve from international sanctions.

What happens next remains unclear. What does withdrawal signal about American foreign policy? What would a new agreement look like – and is it even possible? To answer some of these questions, Stanford News Service talked to three scholars about the issues:

What does withdrawal from the Iran deal signal about American foreign policy?

Milani: It signifies that U.S. foreign policy is dependent on the views, even whims, of one person – the president – and the rhetoric he used during the campaign. Views of U.S. government experts or allies has I think never counted for less.

Weiner: The withdrawal from the JCPOA signals a departure from the notion that the U.S. places high value on the benefits of stability, predictability and consistency in its foreign relations. It also reflects the Trump administration’s belief that the U.S. has the ability to persuade other countries to accommodate American interests through coercive mechanisms.

How will withdrawal from the Iran nuclear deal be viewed from inside Iran?

Milani: Iran is a country divided. The people, suffering from a profound – even existential – economic crisis, are worried about their future. Bickering political factions in the regime are playing the blame game: first blame the U.S., and then opposing factions.

Can the Iran nuclear deal withstand U.S. withdrawal? What options are available – both politically and legally?

Hecker: I don’t see Iran making a mad dash for nuclear weapons to respond to the U.S. withdrawal. The country has too much to lose. Tehran could decide to keep the essence of the deal with the other countries and isolate the U.S. It may find that it will get adequate sanctions relief from the other countries in spite of U.S. pressure. That may be sufficient for Iran to continue to honor its nuclear deal commitments for now.

Milani: I would be surprised if the deal does not survive. It was never a U.S. deal.  The U.S. was simply a key player. Europe, U.K., China, Russia, the UN, and International Atomic Energy Agency (IAEA) want it to continue – Iran, too.

Weiner: In a sense, yes. Iran is free to continue to comply with the restraints on its nuclear activities negotiated in the JCPOA and to accept IAEA inspections. The other signatories to the JCPOA are free not to re-impose on Iran the sanctions that were lifted under the JCPOA. Because of the reach of U.S. sanctions, however, European companies in particular will face significant risks in doing business in Iran, which means Iran will be deprived of many of the commercial benefits it sought in negotiating the JCPOA. It is far from clear that the remaining, much more limited benefits available under the JCPOA will be appealing enough for Iran to continue to suspend those aspects of its nuclear program that are covered by the JCPOA.

What are reasons to oppose the Iran nuclear deal?

Hecker: The deal was able to get more Iranian nuclear concessions than I had ever thought possible. Apparently, the Trump administration objected primarily that the deal did not include Iran’s other activities, such as missile tests and Iran’s role in the region that it views as unacceptable. However, some of President Trump’s claims about the nuclear deal were simply incorrect.

Milani: The deal surely had flaws. It did not address such critical issues as Iran’s missile program, the regime’s role in places like Syria and Iraq, and human right abuses at home. It surely was not the worst deal in history. It was the least bad option at the time.

Weiner: The key objection voiced by many critics of the JCPOA concerns the “sunset provisions” in the deal, under which many key restrictions in the JCPOA on Iranian nuclear activities last only for 10 or 15 years (depending on the particular restriction). This potentially allows Iran to benefit from sanctions relief now and to merely postpone its pursuit of a nuclear weapon. Other objections concern the failure of the JCPOA adequately to address Iran’s missile development programs or its destabilizing regional activities more generally.

What nuclear facilities remain in place in Iran, and how easily might they be repurposed to create weapons?

Hecker: Iran has dramatically reduced its inventories of enriched uranium in compliance with the deal. It has enrichment facilities that could be restarted rather easily to enrich uranium to weapons grade, but not without withdrawing from the deal. It could also begin construction of a new plutonium-producing reactor, but that would be rather costly since it made the one under construction inoperative in compliance with the deal. The bottom line is that it would take quite some time to get back to the material inventories and facilities Iran had before the deal went into effect.

Milani: Iran’s enrichment facilities remain but much of their capacity has been mothballed. Ninety-eight percent of the country’s low enrichment uranium has been shipped out of the country. The Arak heavy water reactor has been virtually dismantled. All known facilities are under constant surveillance by the IAEA. The regime’s missile program has, however, continued.

What effect could withdrawal have on anticipated talks with North Korea?

Hecker: That’s quite uncertain. North Korea may still want a deal, but it would likely ask for greater assurances from the U.S. about potential withdrawal, just as the U.S. is pressing North Korea about its past history of compliance.

Weiner: Commentators have observed that withdrawal from the JCPOA raises questions about U.S. credibility and its willingness to keep its word. Some suggest that this will make North Korea less likely to move actively in the direction of complete, verifiable, irreversible nuclear disarmament for fear that once it has given up its nuclear program, the U.S. might simply re-impose sanctions or pursue other hostile policies towards it. On the other hand, President Trump has emphasized that he would keep any commitments he makes in negotiations with North Korea; it was only the commitments of the prior U.S. administration that he did not feel obliged to honor. Whether this would provide enough confidence to the North Koreans to trust the United States is, of course, far from clear.

What would a new deal look like?

Hecker: I don’t see a new deal involving this administration as a possibility.

Milani: I think the U.S. could have had more impact on a possible revamped deal had it stayed in the agreement. It remains to be seen whether Europeans will continue to try to coordinate with the U.S. and will try to forge a different agreement with the regime.

Weiner: A new agreement, to be acceptable to the U.S., would have to eliminate (or at least significantly extend) the sunset clauses and address Iran’s missile program. From Iran’s side, a revised deal would have to involve more than just lifting sanctions against Iran. It would also have to more emphatically embrace the prospect of American companies doing business in Iran. With respect to commercial relations, Iran argues that even though the United States formally lifted sanctions against Iran after the JCPOA took effect, the ongoing threat that U.S. sanctions would be re-imposed has effectively dissuaded many businesses in both the U.S. and Europe from pursuing long-term business arrangements in Iran.

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Stanford scholars debate how the Trump administration’s decision on Iran will affect foreign relations. ruskpp / Getty Images
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In his article for the The Bulletin of Atomic Scientists, Abbas Milani writes that "the much-rumored and long-expected announcement by President Trump that he will order the United States to withdraw from the Iran nuclear deal—officially known as the Joint Comprehensive Plan of Action, or JCPOA­—is arguably the worst policy option for addressing problems in what was the least-bad possible deal when it was signed." Read the full article here

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Interested in pursuing a Master’s degree in International Policy? Come check out our newly redesigned Ford Dorsey Master’s in International Policy (MIP) at FSI!

 

MIP is a two-year Master of Arts program that emphasizes the application of advanced analytical and quantitative methods to decision-making in international affairs. It is also offered as a coterminal degree here at Stanford. If you are interested in hearing more, please join us for our upcoming MIP Coterm Info Session:

 

What: MIP Coterm Info Session

Date: May 22, 2018

Time: 12:30 -1:15pm

Location: International Policy Studies Kitchen, Ground Floor, Encina Hall Central (616 Serra St.)

 

Please see more details about the program, as well as application information, on our website: http://ips.stanford.edu/.

 

International Policy Studies Kitchen, Ground Floor, Encina Hall Central (616 Serra St.)

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Roz Naylor, Director of the Center on Food Security and the Environment talks how technology will help meet the growing demand for food and water in the developing world and why tech companies should invest in Africa.

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Roz Naylor and Russ Altman talk the future of food security.
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As a senior policy advisor on the Middle East at the Pentagon and the White House, Colin Kahl has witnessed struggles in the region first-hand. From working to shape the U.S.-led campaign against the Islamic State and the long-term partnership with Iraq to limiting Iran’s nuclear activities to helping craft the U.S. response to the Arab Spring, Kahl knows better than most how important it is to understand this rapidly changing region.

Now that he has joined the Freeman Spogli Institute for International Studies (FSI) as its inaugural Steven C. Házy Senior Fellow, Kahl wants to improve understanding of how developments in the Middle East impact people in the region and security around the globe.

The launch of FSI’s Middle East Initiative provides a first step toward this objective. As the initiative’s first director, Kahl plans to create “connective tissue” for efforts already underway across Stanford.

“There are a number of disparate efforts around campus working on Middle East issues,” said Kahl. “There is a lot of terrific research and engagement going on. My hope is that the Middle East Initiative will serve as a focal point to expose the Stanford community to ongoing work and foster new conversations that are not happening now.”

Many of the Middle East activities already occurring on campus happen at FSI, making it a natural home for the initiative.

“Our scholars are already studying the dynamics of authoritarian regimes in the Middle East, prospects for reform and democracy in the Arab world, ways to counter terrorist activities and promoting economic development,” said FSI Director Michael McFaul. “Stanford students want to dive more deeply into the region’s political, social, economic and technological development. We want to give them that opportunity.”

In the 2018-2019 academic year, FSI’s Ford Dorsey Master's in International Policy plans to begin filling this need by adding a three-course sequence on the Middle East.

Kahl also plans to bring more Middle East scholars from outside Stanford to share their ideas and research.

“I look forward to helping Stanford students and scholars connect and collaborate in ways that enrich our understanding of this vital region,” said Kahl. “Stanford has much to contribute to some of the most pressing policy challenges we face.”

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On April 13, the United States Institute of Peace hosted a panel discussion titled “Ending Civil Wars: How Can We Succeed with Limited Opportunities?” The session was moderated by the director of the U.S.-Asia Security Initiative, Ambassador Karl Eikenberry.

USIP recently posted video and audio-only recordings of the 90-minute session for public view. Watch/Listen here >>

The session focused on insights from “Civil Wars, Violence, and International Responses”, a project co-directed by Ambassador Eikenberry and FSI Senior Fellow Stephen Krasner. Through the efforts of 36 U.S. and international project participants (8 of whom were affiliated with FSI), the American Academy of Arts and Sciences dedicated two issues of its quarterly journal Daedalus to their writings (see below).

Joining Ambassador Eikenberry and Professor Krasner on the dais were Nancy Lidborg (President of USIP), Dr. Stephen Biddle (Professor, Georgetown University), Barry Posen (Professor, Massachusetts Institute of Technology), and Clear Lockhart (Director and Co-Founder of the Institute for State Effectiveness).


Related Publications:

Civil Wars & Global Disorder: Threats & Opportunities - Daedalus, Fall 2017

Ending Civil Wars: Constraints & Possibilities - Daedalus, Winter 2018

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Female Kurdish Soldier in Syria
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The availability of climate model experiments under three alternative scenarios stabilizing at warming targets inspired by the COP21 agreements (a 1.5 ºC not exceed, a 1.5 ºC with overshoot and a 2.0ºC) makes it possible to assess future expected changes in global yields for two staple crops, wheat and maize. In this study an empirical model of the relation between crop yield anomalies and temperature and precipitation changes, with or without the inclusion of CO2 fertilization effects, is used to produce ensembles of time series of yield outcomes on a yearly basis over the course of the 21st century, for each scenario. The 21st century is divided into 10 year windows starting from 2020, within which the statistical significance and the magnitude of the differences in yield changes between pairs of scenarios are assessed, thus evaluating if, and when, benefits of mitigations appear, and how substantial they are. Additionally, a metric of extreme heat tailored to the individual crops (number of days during the growing season above a crop-specific threshold) is used to measure exposure to harmful temperatures under the different scenarios. If CO2 effects are not included, statistically significant differences in yields of both crops appear as early as the 2030s but the magnitude of the differences remains below 3% of the historical baseline in all cases until the second part of the century. In the later decades of the 21st century, differences remain small and eventually stop being statistically significant between the two scenarios stabilizing at 1.5 ºC, while differences between these two lower scenarios and the 2.0ºC scenario grow to about 4%. The inclusion of CO2 effects erases all significant benefits of mitigation for wheat, while the significance of differences is maintained for maize yields between the higher and the two lower scenarios, albeit with smaller benefits in magnitude. Changes in extremes are significant within each of the scenarios but the differences between any pair of them, even by the end of the century are only on the order of a few days per growing season, and these small changes appear limited to a few localized areas of the growing regions. These results seem to suggest that for globally averaged yields of these two grains the lower targets put forward by the Paris agreement does not change substantially the expected impacts on yields that are caused by warming temperatures under the pre-existing 2.0ºC target.

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Environmental Research Letters
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David Lobell
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