On a farming reservoir in Fukuoka City, Fukuoka prefecture, 1,200 photovoltaic (PV) modules cover the water surface to generate electricity and additional revenues for the city. Many floating solar systems have been developed in Japan, but this 300-kW system, which became operational this July, is a bit different. This is the nationâ€™s first floating solar system equipped with microinverters. …read moreContinue reading
Dr. Park Williams, a bioclimatologist whose research focuses on the climatological causes and the ecological consequences of drought, teaches Climatology in the summer semester for the MPA in Environmental Science and Policy Program. ESP intern Alexandria J Nakao-Eligado interviewed Williams to learn more about his timely research. What triggered your interest in trees and climate change?… read more …read moreContinue reading
By Eric Lindstrom
Instruments ready for Lagrangian array deployment at the end of the rainbow.
What do Leonhard Euler (1707-1783) and Joseph-Louis Lagrange (1736-1813) have to do with SPURS-2? How do we have two experiments going on simultaneously honoring the work of these famous mathematicians?
Two frames of reference have taken their names from these 18th century mathematicians. In science, including oceanography, when we make measurements of fluid flows fixed in space, we watch properties such as temperature or salinity as currents carry them by our instruments. This is called an Eulerian frame of reference. However, sometimes we make measurements while following the flow, trying to tag a parcel of water and watch as it moves and changes over time. This water following perspective is called the Lagrangian frame of reference. For example if you watch a river flow past from the bank, you are using an Eulerian frame of reference. If you examine the river from a boat flowing with river, you would be making a Lagrangian observation of the river.
In SPURS-2 we use moorings and a fixed grid of stations to describe a patch of ocean as the water passes by. Moorings, stations, and satellites provide the Eulerian …read moreContinue reading