According to a recent assessment of New York City’s vegetation, grass and trees absorb a significant portion of the city’s vehicle carbon emissions as well as those of certain nearby places. On many summer days, the area’s vegetation not only absorbs all of the carbon dioxide emissions from vehicles, trucks, and buses, but also some additional emissions.
According to a news statement from Columbia Climate School, the study employed high-resolution local vegetation maps to document small patches of greenery that had previously gone unnoticed, some of them in highly urbanized regions. The exchange of carbon dioxide emissions for sugars and oxygen was discovered to be greatly aided by the photosynthetic activity of the vegetation.
According to Dan Wei, a postdoctoral researcher at the Lamont-Doherty Earth Observatory of the Columbia Climate School and the study’s principal author, there is a lot more vegetation than we once imagined. This demonstrates that the environment is important in New York City, and if it is important here, it most likely is important elsewhere.
According to a news release, more than 70% of the carbon dioxide that humans exhale comes from urban areas, with New York City ranking third globally and first in the United States in terms of emissions.
Environmental Research Letters released the paper titled High-resolution modeling of vegetation indicates substantial summertime biogenic CO2 fluxes in New York City.
Contiguous grassland and forest areas, which make up just approximately 10% of the city, were the focus of prior investigations.
The researchers’ new airborne radar photos were used to map the city’s vegetation in six-inch grids, taking into account details missed in earlier depictions, such as vacant lots, lone trees on streets, backyard gardens, and other tiny locales. The 837.8 square miles overall research area was divided into roughly 98-foot grids, with about one-third of that area extending outside of New York City’s five boroughs.
According to Ro Anne Commane, a co-author of the paper and an atmospheric chemist at Lamont-Doherty, most people believe that New York City is merely a grey box and is biologically dead. However, just because there is a concrete sidewalk doesn’t imply a tree isn’t also shaded somewhere else.
The researchers discovered that trees cover 22 percent of New York City or 65.64 square miles and grasses cover roughly 12 percent, or 36.29 square miles.
The researchers examined data from June to August of 2018, when the New York metro region produced approximately 14.7 million tonnes of carbon, to evaluate how all of this greenery affected the city’s carbon dioxide emissions.
According to the study, energy utilized in buildings and automobiles produce the most carbon dioxide. Commane said that compared to the global average of 417 parts per million for carbon dioxide, New York City’s average levels are frequently 460 or higher.
These levels would reportedly be higher if it weren’t for the vegetation, according to the study. It was in charge of over 85% of the daily carbon absorption in the city’s built areas.
According to the study, 40% of the carbon emissions from all sources were absorbed on a significant number of summer days. It was discovered that carbon levels rose in the morning and slightly fell in the late afternoon. In cities with warmer climates than New York, according to Wei, vegetation probably has an even greater impact.
The study of the city’s trees will be expanded by the research team to include species categories in order to identify their unique advantages. Although oaks are widespread in the area, it has been shown that they create the chemical isoprene, which combines with vehicle emissions to form the air pollutant ozone.
Whatever they are, more trees are always better, according to Wei, who was quoted in the news release. But a ranking of the better ones would be helpful.
Study Finds that on many summer days, New York City’s vehicle emissions are absorbed by the city’s vegetation.