Tropospheric Assessment of Carbon Monoxide, Nitrogen Dioxiode, and Aerosols in Onitsha, Anambra State, Southeastern Nigeria – a Case Study of 2019–2024
Abstract
Onitsha
faces
severe
air
pollution,
exposing
residents
to
harmful
levels
of
carbon
monoxide
(CO),
nitrogen
dioxide
(NO₂),
and
aerosols.
This
study
assessed
Sentinel-5P
satellite
data
using
Google
Earth
Engine
from
2019
2024,
analyzing
pollution
trends
statistical
differences
across
the
years.
CO
NO₂
peaked
in
February,
with
highest
2024
(0.0537
mol/m²)
lowest
2023
(0.0481
mol/m²).
were
2021
2022,
while
aerosols
2022
remained
high
commercial
areas.
Statistical
analysis
confirmed
varying
significance
significantly
different
between
2020
(p
<
0.05)
highly
0.01),
no
significant
>
0.05).
0.05),
other
comparisons
showed
Aerosol
periods
Pollution
hotspots
found
around
Main
Market,
Niger
Bridge,
Ochanja
linked
traffic,
industries,
open
waste
burning.
Despite
fluctuations,
pollutant
high,
posing
health
risks.
Addressing
this
requires
stricter
emission
controls,
better
transportation
policies,
continuous
quality
monitoring.
Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 27, 2025
Language: Английский