Blind prediction of broadband coherence time at basin scales

Blind prediction of broadband coherence time at basin scales.

A blind comparison with data is made with a model for the coherence time of broadband sound (133 Hz, 17-Hz bandwidth) at 3709 km. Coherence time is limited by changes in the ocean because the acoustic instruments are fixed to the Earth on the bottom of the sea with time bases maintained by atomic clocks. Although the modeled coherence time depends a bit on the difficult problem of correctly mod...

Transport at basin scales: 2. Applications

In this paper, the second of a series, we apply the models discussed in Part 1 to a significant case study. The nature of the catchment under study, the transport phenomena investigated (i.e. nitrates moving as solutes within runoff waters) and the scales involved in space and time, provide an elaborate test for theory and applications. Com5 parison of modeling predictions with field data (i.e....

Transport at basin scales: 1. Theoretical framework

The paper describes the theoretical framework for a class of general continuous models of the hydrologic response including both flow and transport of reactive solutes. The approach orders theoretical results appeared in disparate fields into a coherent theoretical framework for both hydrologic flow and transport. In this paper we focus on the Lagrangian description of the carrier hydrologic ru...

Hydrological Response to Climate Variability at Different Time Scales: a Study in the Ebro Basin

Broadband modal coherence and beamforming at megameter ranges

This thesis develops a method for estimating the normal mode decomposition of broadband signals and uses it to analyze data from the Acoustic Thermometry of Ocean Climate (ATOC) experiment. Normal modes are the eigenfunctions of the ocean waveguide, derived from the frequency-domain wave equation. They are useful in underwater acoustics, particularly matched field processing and tomography, bec...