A 50-year record details accumulation flux profiles and temporal trends of organochlorine pesticides DDT and HCH in sediment cores from two lakes on King George Island, West Antarctica. The dataset, provided by SCIOPS, reveals differing DDT flux patterns between a lake with glacier meltwater input and one without. An abnormal DDT flux peak in the 1980s was observed in the core influenced by meltwater, contrasting with a gradual post-1960s decline in the other.
Use Cases
- Analyze temporal trends of DDT accumulation flux in lake sediments to identify peak contamination periods like the 1960s and 1980s.
- Compare DDT flux profiles between sediment cores with and without glacier meltwater input to assess climate warming impacts on pollutant release.
- Model the relationship between regional climate warming and the discharge of historically stored DDT from the Antarctic ice cap into lake systems.
- Study the accumulation flux of HCH alongside DDT to understand the deposition history of multiple organochlorine pesticides in a remote environment.
Strengths
- 50-year temporal coverage enabling long-term trend analysis
- Comparative data from two distinct lake cores with different hydrological inputs
Limitations
- Unknown sample size or row count for statistical robustness
- Geographic scope limited to two lakes on King George Island
- Data recency and update frequency are unknown
Provenance
- Source
- SCIOPS via NASA EarthData
- Collection Method
- Analysis of organochlorine pesticide accumulation in sediment cores extracted from Antarctic lakes.
- Time Range
- Approximately 50 years, with specific events noted in the 1960s and 1980s.
- Geography
- King George Island, West Antarctica.