In addition, we used a seafloor time-lapse camera system, as well as video surveys conducted at 3 4 months intervals, to monitor the presence and accumulation of phytodetritus at the sediment water interface.
Site effects are thought to be different among observation periods, even if the locations are almost the same, because different conditions exist for the mechanical coupling between the OBS and the seafloor each time an OBS is deployed.
Kīlauea built itself up from the seafloor over time, and thus much of its bulk remains underwater; its subaerial surface is in the form of a gently sloping, elongate, decentralized shield with a surface area of approximately, making up 13.7 percent of the island's total surface area.
And yet during the war years, the US Navy had found that sound pulses used for locating enemy submarines also reflected from the seafloor, and the time taken for sound to travel down and back could be used to measure water depth.
Figure 6 Comparisons of seafloor and onshore time series in east-west and north-south displacements.
In this section, therefore, we discuss the secular change of total CO2 concentration, pH, temperature, and partial pressure of CO2 (pCO2) in seawater based on the CO2 content in the subseafloor uppermost crust (< 1 km deep from the seafloor) through geologic time.
In January 2013, the LTBMS was connected to the Dense Ocean Floor Network System for Earthquakes and Tsunamis (DONET), which is a submarine cabled real-time seafloor observatory network for earthquake and tsunami monitoring (Kitada et al. 2013).
Whale falls may occur as frequently as every ten miles on the seafloor; at any given time, there are likely hundreds of thousands of them around the world.
On the ridge flanks, a series of off-axis magma lenses (OAML) are imaged: they are located 2 10 km from the ridge axis, at 700 to 1520 ms two-way travel time below seafloor (bsf) (∼1.6 to 4.5 km bsf), with variable areas ranging from 0.5 km2 to 5.2 km2.
Time-dependent seafloor displacement, which generates the tsunami, can be accounted for through an additional term in the mass balance Eq. (1).
Recent studies have demonstrated success for usage of BMFCs in powering small instruments and other devices on the seafloor over limited periods of time.
