Tulane work on sampling of climatic proxy records & stratigraphy
Fast Autogenics relative to climate change Movie demonstrating the influence of autogenic processes on sampling climatic “proxy” signals. Evolution of synthetic stratigraphy from experiment
TDB-10-1 at a proximal laser strike section. Topography was sampled at a high temporal resolution relative to autogenic dynamics. Here we stack measurements of topography,
clipped for erosion and color deposit by a climatic proxy that is sampled from a continuous time series. In this simulation, the system samples a climatic record that has a
short periodicity relative to the autogenic dynamics. Specifically, the climate period is 0.5Tc, where Tc is the systems compensation time scale. As such, it is difficult
to extract signal from any 1-D sections of strata. Overhead movie of experiment TDB-10-1 is shown below. More details of
experiment can be found in manuscript: Foreman, B.Z. and Straub, K.M., 2017, Autogenic geomorphic processes determine resolution of terrestrial paleoclimate records, Science Advances, v. 3, e1700683, DOI: 10.1126/sciadv.1700683.
Slow Autogenics relative to climate change Movie demonstrating the influence of autogenic processes on sampling climatic “proxy” signals. Evolution of synthetic stratigraphy from experiment
TDB-10-1 at a proximal laser strike section. Experiment was conducted in Tulane's Sediment Dynamics and Stratigraphy Lab. Topography was sampled at a high temporal
resolution relative to autogenic dynamics. Here we stack measurements of topography, clipped for erosion and color deposit by a climatic proxy that is sampled from a
continuous time series. In this simulation, the system samples a climatic record that has a long periodicity relative to the autogenic dynamics. Specifically, the climate
period is 2.0Tc, where Tc is the systems compensation time scale. As such, it is possible to extract the signal from most 1-D sections of strata.More details of
experiment can be found in manuscript: Foreman, B.Z. and Straub, K.M., 2017, Autogenic geomorphic processes determine resolution of terrestrial paleoclimate records, Science Advances, v. 3, e1700683, DOI: 10.1126/sciadv.1700683.
Non-cohesive delta undergoing pure aggradation Video of laboratory experiment (TDB-10-1) documenting evolution of channelized delta experiencing relative subsidence at a constant rate. Digital
video was collected from camera at an approximately 45 degree from vertical which was then post-processed to remove camera distortion to yield a close to
synoptic representation of the experimental basin. Video is presented at 360 times the actual experimental run-time. Video includes evolution of delta
between run hours 70-79. Blue dye added to water aids identification of flow field.
Tulane work on sampling of climatic proxy records & stratigraphy