#Expert Q&A: Amid the Wildfire Haze, NJIT's Alexei Khalizov Explains What's in the Air

Sep 21, 2023

4 min

Alexei Khalizov



The soot that permeated the air in New Jersey and New York this summer — courtesy of massive wildfires in Canada — is exactly what a New Jersey Institute of Technology professor is studying to determine its impact on climate change.


Alexei Khalizov, an associate professor of chemistry and environmental science, is partnering with Associate Professor Gennady Gor on the three-year project, which began last year and is supported by a $620,000 grant from the National Science Foundation. Specifically, they’re examining the soot created by wildfires and the burning of fossil fuels in hopes of better predicting its impact on climate.


Khalizov, who’s been at NJIT since 2013, took time out from his research to explain what millions of residents of N.J. and N.Y. are experiencing as a result of the wildfires hundreds of miles to the north.



QWhat’s in the smoke?

Small particles and some gas chemicals. These particles and chemicals were released by wildfires and they were picked up by the air mass and carried all the way to New Jersey from Canada. Those particles are extremely small: you can stack maybe a hundred of such particles across single human hair thickness.


Q: Is breathing it the equivalent of smoking a pack of cigarettes?

That would be a reasonable comparison. A cigarette is made of plant material. When it smolders and burns it releases particles that are very much like those particles from wildfires. Maybe the only difference is that the wildfires have no nicotine. But they have lots of other chemicals.


Q: What factors contribute to the density of the smoke?

Well, it's a major wildfire. It covers a huge territory in Canada. And the meteorology is such that this smoke is carried all the way from Canada to the U.S. without significant dilution. And due to that, the concentration of those particles is very high.


Q: When did we last experienced something of this magnitude?

We had some Canadian and Alaskan wildfires a few years ago. And air mass transport brought the smoke all the way to New Jersey, but it wasn't as bad as what we are observing today.


Q: What about in terms of EPA standards?

The Environmental Protection Agency has a list of criteria pollutants. One of those pollutants is particles smaller than 2.5 microns. And typically, if the concentration of those particles exceeds 35 micrograms per cubic meter, the air is considered unhealthy. When I looked at the map of pollution today (June 7, 2023), it showed that throughout the majority of New Jersey, the concentration is around 90 micrograms, which is two to three times higher than this unhealthy threshold. And actually, there is a location, I believe it's around Paterson, where the concentration is 140 micrograms, which is four to five times above the threshold.


Q: Can the wildfires in South Jersey be contributing to this?

It's possible, but probably it's not a major contribution. Also, if you look at the wind pattern, it's probably not a major factor at all.


Q: Why is wind unable to disperse the smoke?

For the wind to disperse the smoke, one needs to mix clean air with all this contaminated air and the amount of contaminated air is so high that there’s no clean air around to actually produce any dilution.


Q: Why is there so much haze?

It’s because of the continuous inflow of air, which is contaminated by emissions from the wildfires. The haze itself has a relatively short lifespan.



Q: How does temperature change affect the smoke?

If the temperature increases that may accelerate the rate of some chemical reactions that will also be accelerated by the sunlight. And that's one reason why the smoke that was released in Canada is not exactly the same smoke that we experience in New Jersey. As this haze is traveling over three to six hundred miles, it undergoes a number of chemical reactions and even the smell changes. You know how freshly released wood smoke smells — it's actually pretty pleasant. What we're smelling now, it's not pleasant at all. That's the result of those chemical reactions, which makes this even more unhealthy.


Q: Will rain immediately clear the smoke?

Yes, it will. If we could have rain, then the rain would remove the majority of these particles. And in fact, I believe we've been experiencing the smoke for several days, almost a week now. It would go up and decrease. And we’ve had several rains and those rains did really clear out some smoke.


Q: What can we do individually and collectively to protect ourselves?

We can help ourselves by staying indoors and wearing masks if you have to go outside. Certainly, exercising outside is not a good idea even while wearing a mask. Also, if you have a central air conditioning system, you can turn on the fan to run the air through the filter, which will remove some of these particles. It depends on what kind of filter you have — high efficiency or regular.


Q: What kind of mask?

Make sure that it's an N-95 mask, not a surgical mask. A surgical mask is not is not going to help you at all.


Q: How does what we’re experiencing relate to your research?

My collaborator and I received a major grant from the National Science Foundation to study the particles released by combustion. As they travel through the air, they change both in shape and in composition. And these changes affect their toxicity and they affect their impact on climate. These particles actually are one of the warming agents. So, we hope that within about three years of working on this project, we’ll be able to explain better what happens and then modelers will be able to predict the impacts of such events with better accuracy.


Looking to know more - we can help.


Alexei Khalizov is available to discuss this important topic with media - simply click on his icon now to arrange an interview.




Connect with:
Alexei Khalizov

Alexei Khalizov

Associate Professor, Chemistry and Environmental Science

Alexei Khalizov's research focuses on the chemical and physical processes that govern the transformations of atmospheric pollutants.

Air QualityAtmospheric ChemistryAtmospheric PollutantsAerosol NanoparticlesMercury

You might also like...

Check out some other posts from New Jersey Institute of Technology

3 min

#Expert Q&A: NJIT’s Donghee Yvette Wohn Weighs the Pros and Cons of Kids Playing Esports

Donghee Yvette Wohn, an associate professor at New Jersey Institute of Technology and director of its Social Interaction Lab, focuses on human computer interaction, where she studies the characteristics and consequences of social interactions in online environments such as social media, live streaming, virtual worlds (metaverse) and esports. Here she explains the appeal of esports among children in particular and how their parents can assess what’s appropriate for them. How would you describe the current landscape of esports? Esports is an umbrella term that is used for competitive computer gaming that usually, but not always, happens in teams. However, similar to books or movies, the content of the games vastly differs. Some games are very violent, some are not. Some have very realistic graphics, some are very fantasy-like and playful. It is thus hard, especially as a parent, to make blanket decisions when it comes to esports, you may have to take things case by case. So, then how can parents assess what’s appropriate for their children? A quick online search into the nature of the game to see its description or even watching ten minutes of what the gameplay looks like on YouTube or Twitch — where many people upload videos of gameplay — will give parents a better idea of what the game is like without having to play it themselves. What about in terms of the other players? It may be useful to use physical sports or any other extracurricular activity as a mental reference when thinking of how to deal with certain issues. For example, soccer is a sport that is great for socializing and team building, but if one is placing a 10-year-old in a game with other adults, there would be a lot of extra things one would want to consider. Like any social activity, one would want to be mindful of who the child is playing with, how much they are playing and how they are playing. For example, are they being respectful? And what kind of language is being used during the game? What skills could esports and similar gaming help children develop? Based on research, the collaboration and communication skills required to play successfully are extremely high. Even though people do not associate computer games as being a physical skill, the dexterity and hand-eye coordination required to play well require a very high level of intellect and physical ability. Of course, not everyone plays that well, but it does indicate that esports is a little different than some games that are more “mindless” or “relaxing” in nature. What about social skills? It strengthens existing friendships and can also open up one’s world by conversing with strangers. My colleagues and I did a research study where we found a student living in a rural area where most people did not go to college who wanted to go college because he was inspired by the older college students he was playing with. Playing the game in supportive environments can be mentally and socially beneficial. What are the downsides? Like any social situation, there is always the possibility of people misbehaving. The types of harassment documented in gaming environments is so horrible, but the reality is that children are exposed to all types of horrible situations — both online and offline — and helping them navigate difficult situations can help build resilience for the future. What’s a common misconception among parents? The most important thing is to understand that whatever happens in esports is not to be dismissed as something that is “only online” or “not real.” The emotions that children experience in the virtual world are very much real. How much parental supervision is needed? Younger children’s brains have not yet developed self-constraint, so the parent should decide how much time should be spent playing games, what games are played and who they are played with. Older children — once they start understanding logic — should be encouraged to plan these things for themselves. Looking to know more? We can help. Yvette Wohn is available to discuss esports and kids with media. Simply click on her icon  to arrange an interview.

3 min

#Expert Q&A: NJIT’s David Bader on AI, Data Science, Quantum Computing

Artificial intelligence, data science and the emerging field of quantum computing are among the hottest research topics in computing today. David Bader, a distinguished professor at New Jersey Institute of Technology’s Ying Wu College of Computing and the director of the university’s Institute for Data Science, offers his take on each. The Computer History Museum has recognized you for developing a Linux supercomputer using commodity hardware. Was that a life-shaping lesson? It was a venture into the unknown, leveraging the emerging potential of Linux and commodity hardware to build something that was both accessible and powerful. This experience taught me the importance of embracing risk and the value of resilience. There were technical hurdles, skepticism from peers and the daunting task of venturing beyond established norms. Also, the Linux supercomputer project was not just about the technology. It was about building a community around an idea. How do user-friendly AI systems like ChatGPT impact your work? It enriches the palette of methodologies and technologies at our disposal, enabling us to tackle more ambitious projects with greater efficiency and creativity. By integrating these AI systems into our research and educational programs, we're not just enhancing our ability to process and analyze data. We're also empowering students and researchers with the means to innovate and explore new horizons in data science without being hindered by the technical complexities that once acted as barriers. Some information workers fear that AI will make their careers obsolete. But tech progress can’t be stopped, so how should people adapt? By embracing these technologies, learning to work alongside them and leveraging their capabilities to enhance our own skill sets and productivity. Also, it's important to focus on the uniquely human skills that AI cannot replicate, such as creativity, emotional intelligence and critical thinking. By honing these abilities, workers can ensure they remain irreplaceable components of the workforce, capable of tasks that require a human touch — from complex decision-making to empathetic interactions with customers or clients. What should non-programmers learn about AI? It’s important to be aware of how AI decisions are made, the potential biases in AI systems and the ethical considerations of AI use. Additionally, developing data literacy is crucial, as it enables individuals to evaluate AI outputs and understand the importance of data quality and biases. A basic grasp of AI and machine learning concepts — even without programming skills — can demystify AI technologies and reveal their potential applications. Staying informed about AI advancements across various sectors can also inspire innovative ideas and foster interdisciplinary collaborations. There’s a sci-fi plot where computers get so smart that people lose control. The new class of user-friendly AI is making people excited but also nervous. Should we be afraid? While it’s natural to harbor concerns about the rapid progression of AI, allowing fear to dominate the discourse would be a disservice to the potential benefits these technologies can offer. Instead, this moment calls for proactive engagement with AI and an investment in understanding its inner workings, limitations and the ethical dilemmas it presents. By advocating for responsible AI development, emphasizing education and promoting transparency, we can foster an environment where AI serves as a tool for societal advancement. This approach ensures that we remain at the helm of AI's trajectory, steering it toward outcomes that uplift humanity rather than scenarios that fuel dystopian fears. What other emerging technologies excite you in their potential to transform computing? Quantum computing. This technology, with its potential to solve complex problems exponentially faster than classical computers, could revolutionize fields ranging from cryptography to drug discovery, climate modeling and beyond. Quantum computing's promise to tackle challenges currently beyond our reach, due to its fundamentally different approach to processing information, represents a leap forward in our computational capabilities. Its convergence with AI could lead to unprecedented advancements, making this era an incredibly thrilling time to be at the forefront of computing and data science. Looking to know more? We can help. David Bader is available to discuss AI, quantum computing and data science with media. Simply click on his icon to arrange an interview.

2 min

Challenges and opportunities of brownfields

The estimated 450,000 brownfields in the U.S. come in all shapes, sizes and histories. Some are manifested as abandoned buildings and properties contaminated from industrial wastes and building materials, the lingering evidence of a former industrial glory. Others are former commercial properties such as vacated gas stations, dry cleaners and other abandonments. Brownfields can be found in urban, suburban and rural communities. The U.S. Infrastructure and Jobs Act invests $21 billion in environmental cleanup and remediation programs, aimed to address legacy pollution and contamination, including $1.5 billion specifically for grants and loans within EPA’s brownfields program. Colette Santasieri leads NJIT’s Technical Assistance to Brownfield Communities program, which provides ​​free technical assistance to state, regional, county, tribal and local government entities and nonprofit organizations interested in learning about, identifying, assessing, cleaning up and redeveloping brownfield sites in EPA Region 2. She also leads the NJ Brownfields Assistance Center @ NJIT which focuses its technical assistance and resources on New Jersey’s brownfields challenged communities. Cleaning up and redeveloping these properties into community assets is a massive opportunity, one that can catalyze economic development, increase local tax revenue, facilitate job growth, improve social equity, utilize existing infrastructure, take development pressures off undeveloped, open land, and both improve and protect the environment. Santasieri has led multidisciplinary teams of planners, engineers, scientists, architects, economists, cultural resource experts and students. She has a well-rounded and experience-driven perspective when addressing the challenges and opportunities facing governments, regions and communities in their efforts to be sustainable and resilient. To reach Colette, click on the button below.

View all posts