Related Experiment Videos
On the relationship between acid rain and cloud type
1Physics Department, Universidad de Las Palmas de Gran Canaria, Spain. luis.cana@fisica.ulpgc.es
Journal of the Air & Waste Management Association (1995)
|April 2, 2002
Summary
Acid rain episodes in Spain are linked to short-lived convective rainfall, not storm types or fronts. The study suggests meteorological time scale, not cloud type, influences acid rain formation.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
- Meteorology
Background:
- Acid rain poses environmental risks.
- Previous research linked acid rain to storm convective clouds.
- Understanding the meteorological drivers of acid rain is crucial for mitigation.
Purpose of the Study:
- To investigate the relationship between acid rain episodes and meteorological conditions in Spain.
- To identify the origin of major ions in rainwater using statistical analysis.
- To determine the role of different rainfall types in acid rain formation.
Main Methods:
- Analysis of data from Spanish European Monitoring and Evaluation Programme (EMEP) stations over a 5-year period.
- Principal Component Analysis (PCA) to ascertain the origin of major ions (SO4(2-), NO3-, Cl-, Ca2+, K+, Mg2+, Na+).
- Identification of meteorological origins of rainfall events.
Main Results:
- Statistical analysis of pH values indicated that only short-lived convective phenomena are associated with acid rain in Spain.
- Rainfall generated by fronts or long-lived convective systems was found to be neutral or slightly basic.
- The origin of major ions in rainwater was determined through PCA.
Conclusions:
- Acid rain in Spain is primarily associated with short-lived convective rainfall events.
- The meteorological time scale of rainfall, rather than cloud type, appears to be a key factor in acid rain formation.
- Frontal and long-lived convective rainfall systems do not contribute to acid rain in the studied region.