Five-year rolling trend in marine plastic concentration (declared window)
| Object type | Damage Signal |
|---|---|
| SIGNAL Earth ID | DS-00411 |
| Observable type | Groundwater storage volume |
| Unit | m^3 (cubic meters of groundwater stored) |
| Temporal structure | Periodic |
| Monitoring backbone | — |
The
Five-year rolling trend in marine plastic concentration (declared window) is an environmental indicator that tracks changes in the volume of plastic contaminants within marine and adjacent groundwater systems over a five-year period. This trend reflects the temporal dynamics of plastic pollution, which poses chemical stress to aquatic environments and affects water quality. Monitoring such trends is essential for understanding the evolving state of marine and groundwater ecosystems in response to anthropogenic inputs and natural processes.
Plastic pollution in marine environments has become a global concern due to its persistence, potential for bioaccumulation, and impacts on aquatic organisms and habitats. The five-year rolling trend provides a smoothed measure of changes, reducing short-term variability and highlighting longer-term shifts in plastic concentration. This signal is derived from measurements related to groundwater storage volume, linking plastic pollution to changes in water resources.
Within the broader context of environmental monitoring, this trend serves as a state change indicator within the water domain, helping to elucidate the chemical stressor effects of plastics on groundwater storage systems. Understanding these trends supports scientific assessments of pollution sources, transport mechanisms, and potential mitigation strategies.
Geographic / System Context
[edit]This signal encompasses a global geographic scope, reflecting the widespread distribution of marine plastic pollution and its interaction with groundwater storage systems worldwide. Marine plastic contaminants originate from diverse sources including coastal runoff, riverine inputs, and oceanic transport, affecting various marine basins, coastal aquifers, and connected groundwater reserves. The global scale acknowledges the transboundary nature of plastic pollution, where ocean currents and hydrological cycles facilitate the dispersal and accumulation of plastic debris beyond localized regions.
Monitoring and Measurement
[edit]Monitoring of marine plastic concentration trends involves periodic sampling and analysis of plastic particles and related chemical markers in marine and groundwater environments. Scientific methods include water sampling, filtration, and microscopic or spectroscopic identification of microplastics and larger debris. Measurement conventions often quantify plastic concentration by volume or mass per unit water volume, with groundwater storage volume serving as a relevant observable for assessing the state of water resources impacted by plastic contamination. Institutions involved in such monitoring may include environmental agencies, research organizations, and international collaborations focused on marine pollution and water quality assessment.
Within the SIGNAL system, this phenomenon is treated as a defined environmental signal whose boundaries and measurement conventions are described below.
Signal Definition
[edit]The five-year rolling trend in marine plastic concentration (declared window) is defined as the periodic measurement of changes in the volume of plastic contaminants within groundwater storage systems over a five-year temporal window. It quantifies the state change in chemical stressors affecting the water domain by tracking the observable type of groundwater storage volume, expressed in cubic meters (m³). This signal captures temporal trends rather than instantaneous concentrations, emphasizing sustained changes in plastic pollution levels.
Boundary Conditions
[edit]Boundary inclusions encompass plastic contaminants present within groundwater storage volumes that are hydrologically connected to marine environments, including microplastics and larger plastic debris dissolved or suspended in water. Boundary exclusions include plastic pollution confined to terrestrial soils or atmospheric compartments not directly influencing groundwater storage, as well as chemical pollutants unrelated to plastic materials. The signal excludes plastic concentrations outside the declared five-year rolling window and does not account for plastic debris isolated from active groundwater systems.
Aggregation Semantics
[edit]Geographic aggregation for this signal integrates data across global marine and groundwater systems, enabling comprehensive assessment of plastic concentration trends at regional to planetary scales. Temporal aggregation uses a five-year rolling window to smooth short-term fluctuations and highlight persistent changes. Cross-signal aggregation may involve combining this signal with related chemical or hydrological indicators to assess cumulative environmental stressors, although specific cross-signal aggregation rules are to be determined. These aggregation semantics facilitate multi-scale analysis and integration within broader environmental monitoring frameworks.
Observational Status
[edit]Current monitoring efforts provide periodic data on marine plastic concentrations linked to groundwater storage volumes, though the monitoring backbone for this signal is to be established. Data availability varies regionally, with ongoing research refining measurement techniques and temporal resolution. Future SIGNAL releases may incorporate enhanced datasets, improved spatial coverage, and integration with complementary environmental signals to better characterize plastic pollution trends and their impacts on water resources.
Related Signals
[edit]- None specified
Key Associated People
[edit]- Toheeb Lekan Jolaosho (University of Groningen) [Lead author]