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A young boy in the desert surrounding the refugee camp in Touloum, Chad. Photo: Orjan F. Ellingvag / Dagens Naringsliv / Corbis via Getty Images

Some experts are concerned climate change will drive massive migrations as people are displaced from their homes, and it may already be happening. In a study published today in Science, researchers try to quantify how many people move from where to where under what conditions. They looked at asylum applications into the European Union and the weather in people's country of origin and found that as temperatures rose there, so did the number of people seeking asylum.

The context: It's timely — the U.S. Department of Defense has called climate change a "threat multiplier" and the defense authorization bill signed by President Trump last week acknowledges climate change as a "direct threat to the national security of the United States." Yet that view is noticeably absent from the president's National Security Strategy unveiled earlier this week.

"This is the perfect example of why the [Trump] administration shouldn't be ignoring climate change," says Michael Oppenheimer, a professor of geoscience and international affairs at Princeton University who was not involved in the study but collaborates with the authors.

What's new: Earlier studies found a link between unfavorable changes in climate — which are known to affect agriculture and GDP — in a country (for example, Syria) and migration out of it. The new study looks at the issue across 103 countries of origin and separates people who planned to migrate from asylum seekers who are forcibly displaced. The latter are treated differently under international law and, in turn, government policy, says Oppenheimer.

What they did: Study authors Wolfram Schlenker and Anouch Missirian from Columbia University paired data from the UN High Counsel on Refugees about people seeking asylum in the EU between 2000 and 2014 with the average temperature and total precipitation per month in applicants' countries of origin. They looked at the weather in the country overall and specifically in areas where maize is grown — the rationale there being that a large percentage of people in these countries work in agriculture, which is sensitive to weather fluctuations. Maize is a staple commodity grown around the world.

Asylum applications make up about one-tenth of overall migration but Schlenker says he wanted to focus on them because they are driven by distress. They purposely looked at the impact of climate change before the current refugee crisis. (That too was preceded by a drought in Syria that some researchers think was a factor in conflict there.)

What they found: At an average growing season temperature of about 68° Fahrenheit, which is the optimum one for agriculture, the number of applications for asylum was lowest. As the average temperature rose, so did the number of people from Somalia, Bangladesh and other warmer climate countries seeking asylum. But when cooler countries — such as Serbia and Peru — got warmer, fewer applications were received.

The acceptance rate for asylum application to the EU is less than 10%, Schlenker says. But when there was a spike in applications tied to weather fluctuations, the admittance rate rose to about 30%, suggesting agencies who evaluate the applicants find their cause worthy, he points out.

What comes next: Under one scenario — in which greenhouse gas emissions decline — the researchers predict there could be 98,000 more asylum applications each year by 2100. If emissions continue to rise as they have been, it could lead to up to 660,000 additional applications to the EU each year.

Keep in mind: The scenarios hold all else constant and the world is anything but that. Growing seasons could be adapted. And standards for judging applications for asylum could be become stricter or relaxed, and discourage or encourage people to apply, Oppenheimer says. "The prevalence of conflict and other conditions causing people to want to flee could change in either direction as well." And, the relationship between climate, conflict and migration is a complex one.

The bottom line: "You can't insulate yourself that easily from climate change, given how connected we are," Schlenker says.

Go deeper

Updated 5 hours ago - Energy & Environment

Bomb cyclone prompts blizzard warnings from Virginia to Maine

Computer model projection showing the intense storm off of Cape Cod on Jan 29, 2022, with heavy snow and strong winds lashing the coastline. (Weatherbell.com)

Blizzard warnings are in effect for 11 million people from coastal Virginia to eastern Maine as a historic winter storm is set to slam the Mid-Atlantic and Northeast beginning Friday.

Why it matters: The storm will bring hazards ranging from zero visibility amid hurricane force wind gusts and heavy snow, to coastal flooding that will erode vulnerable beaches and threaten property from the Jersey shore to coastal Massachusetts.

Updated 5 hours ago - Politics & Policy

Omicron dashboard

Illustration: Shoshana Gordon/Axios

  1. Health: Contact tracing fizzles across America — New clues emerge on long COVID — Omicron is finally burning out — It's very difficult to get access to antiviral COVID treatments — Axios-Ipsos poll: Omicron's big numbersAnother wave of death — FDA limits use of Regeneron and Lilly antibody treatments.
  2. Vaccines: Pfizer begins clinical trial for Omicron-specific vaccine — The shifting definition of fully vaccinated.
  3. Politics: Virginia AG says public colleges can't mandate COVID vaccines —Alaska governor joins Texas lawsuit over National Guard vaccine mandate — Navy discharges 45 sailors for refusing vaccine — Spotify to remove Neil Young's music after his Joe Rogan ultimatum — White House: 60M households have ordered free COVID-19 rapid tests.
  4. World: U.K. to lift travel testing requirement for fully vaccinated — Beijing Olympic Committee lowers testing threshold ahead of Games.
  5. Variant tracker
8 hours ago - World

Biden will move U.S. troops to Eastern Europe "in the near term"

President Biden boards Air Force One at Joint Base Andrews on Jan. 28. Photo: SAUL LOEB/AFP via Getty Images

President Biden said on Friday he plans to move U.S. troops to Eastern European and NATO countries “in the near term.”

Driving the news: “Not too many” U.S. troops, Biden added in remarks to reporters at Joint Base Andrew upon returning from a trip to Pennsylvania.