Ekman reversing water bottle

The Ekman reversing water bottle is an oceanographic instrument used to collect water samples at various depths. Developed by Swedish oceanographer V. Walfrid Ekman, this device is particularly useful in freshwater lakes and sometimes in the ocean. It allows for the simultaneous measurement of water temperatures at the time of sample collection.1

Ekman is renowned for his foundational research in physical oceanography, particularly his studies on ocean currents. His work led to the coining of terms such as the Ekman layer, Ekman spiral, and Ekman transport, all of which are crucial concepts in understanding oceanic and atmospheric dynamics. While the Nansen bottle was a precursor, modern oceanographic sampling often utilizes the Niskin bottle.1234