Heather Johnstone
Papers
2
Total Citations
10
H-Index
2
About
Heather Johnstone is a paleoceanographer whose research focuses on refining geochemical proxy methods to reconstruct past ocean conditions. Her key contributions lie in developing innovative laboratory techniques for analyzing foraminiferal shells—microscopic marine organisms whose chemistry records ancient seawater temperatures and circulation patterns. She pioneered an automated cleaning protocol using a pipette robot to remove contaminants from foraminifera before Mg/Ca analysis, a critical step for accurate temperature reconstructions. This work, published in 2016, has garnered 8 citations and represents a methodological advancement that improves reproducibility in paleoclimate studies. Johnstone also investigates the upper water column structure by analyzing individual tests of thermocline-dwelling species like *Globorotalia inflata*. Her 2020 study off Mauritania demonstrates how single-shell δ¹⁸O, δ¹³C, and Mg/Ca measurements can resolve fine-scale hydrographic variability, offering a powerful tool for understanding past ocean dynamics. Though her citation counts are modest, her contributions are notable for their technical rigor and potential to enhance the precision of paleoceanographic proxies, making her work valuable for researchers seeking to unravel Earth’s climate history.
Research Focus
Key Achievements
Top Papers
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