(CTN News) – There has been a growing body of evidence showing that the impact of organic nitrogen (ON) aerosol depositions on ecosystems has been underestimated in the past.
There is also a possibility that the ecological effects of ON aerosol depositions are going to intensify due to global warming and the reduction of oxide emissions from human activities as a result of human activities.
This study, which was led by Dr. Yumin Li from the Southern University of Science and Technology (SUSTech), was a collaborative effort between Professor Tzung-May Fu, an associate professor at SUSTech, and Professor Jian Zhen Yu, an associate professor at the Hong Kong University of Science and Technology.
There is no doubt that atmospheric deposition of organic nitrogen (ON) is an important component of the global nitrogen cycle.
It has been determined from surface measurements that, in local areas, organic nitrogen constitutes between 2% and 70% of the total atmospheric.
Deposition of nitrogen in the form of atmospheric deposition fluxes.
Despite this, previous models have largely ignored the spatial and chemical variations in atmospheric oxygen, resulting in an insufficient assessment of the consequences of this phenomenon around the world.
Researchers at SUSTech and HKUST developed a global model that covers both atmospheric gaseous organic nitrogen (ON) and particulate organic nitrogen (PON).
They drew on the most recent insights regarding emissions and secondary formation processes for the model.
As a result of their model, they successfully generated simulated surface concentrations of atmospheric particulate ON (ONp), demonstrating significant concordance with global observations, a noteworthy accomplishment previously unachieved.
In addition, they found that their simulations of atmospheric deposition flux were within the same order of magnitude as global observations.
Using the researchers’ estimates, it can be estimated that the global deposition of atmospheric organic nitrogen (ON) amounted to 26 teragrams (Tg) of nitrogen per year as a result of atmospheric deposition.
There is an important portion of this atmospheric deposition that takes place in the form of ON aerosols, about 23 Tg N yr-1, which accounts for 19% of the total global atmospheric nitrogen deposition, which stands at 124 Tg N yr-1.
A number of factors contribute to the production of ON aerosols. These factors include wildfires, emissions from the ocean, and secondary formation processes.
Wildfires are expected to become more frequent and intense in a world marked by global warming, which will result in the occurrence of more wildfires. In addition to this, climate change will result in the stratification of the ocean surface.
As a result of these changes, the importance of atmospheric organic (ON) deposition in supporting these ecosystems is being highlighted as a vital source of nitrogen.