A5100774744- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- earthquake and tectonic studies
- Seismic Imaging and Inversion Techniques
- Atmospheric aerosols and clouds
- Climate variability and models
- Ocean Waves and Remote Sensing
- Geochemistry and Elemental Analysis
- Impact of Light on Environment and Health
- Atmospheric Ozone and Climate
- Geological and Geochemical Analysis
- Precipitation Measurement and Analysis
- Radioactive element chemistry and processing
- Geophysics and Sensor Technology
- Geomagnetism and Paleomagnetism Studies
- Oceanographic and Atmospheric Processes
Planetary Science Institute
2020-2023
Harvard University
1999-2023
Harvard University Press
2023
St. Francis Xavier University
2019
University of Miami
2007
Brigham and Women's Hospital
1999
Daytime measurements of reflected sunlight in the visible spectrum have been a staple Earth-viewing radiometers since advent environmental satellite platform. At night, these same optical-spectrum sensors traditionally limited to thermal infrared emission, which contains relatively poor information content for many important weather and climate parameters. These deficiencies our ability characterize full diurnal behavior processes parameters relevant improved monitoring, understanding...
Mobile Earthquake Recorder in Marine Areas by Independent Divers, or MERMAID floats, provide a unique dataset to probe the oceanic soundscape. not only records arrivals from earthquakes at local teleseismic distances, but also acoustic noise various sources within water column. Particular floats are able directly report power spectral densities (PSDs) with time, allowing for examination of strongest source noise, ocean waves. We make comparisons between PSDs recorded Mediterranean starting...
Abstract Ocean waves excite continuous globally observable seismic signals. We use data from 52 distributed seismographs to analyze the vertical component primary microseism wavefield at 14–20 s period between late 1980s and August 2022. This signal is principally composed of Rayleigh generated by ocean wave seafloor tractions less than several hundred meters depth, thus a proxy for near-coastal swell activity. Here we show that increasing amplitudes 3 σ significance occur 41 (79%) negative...
Abstract The local structure of Ta(V) in high-temperature fluoride- and chloride-bearing acidic solutions was investigated using situ X-ray absorption spectroscopy (XAS). All XAS spectra were collected from two solutions, designated A B, at beamline ID-20-C the Advanced Photon Source, Argonne National Laboratory. Spectra solution 350 400 °C B 25, 360, after sealed a hydrothermal diamond anvil cell. Solution prepared by dissolving Ta2O5 powder 5% HF solution; consisted TaCl5 dissolved 2% HF....
ABSTRACT This study examines analog seismograms that were generated when most seismic stations had their own clock for timing, making precise comparison of time between different difficult. Availability accurate relative timing facilitates differential travel-time analyses, such as tomography and local earthquake relocations, to be performed using data originally recorded on paper or other physical media. These analyses allow the investigation longer-term processes like cycle climate change....
Abstract One of the most prominent challenges related to legacy seismic data is determining how these can be appropriately used in modern research applications. The wide variety instrumentation analog era, format recording on paper wrapped around a helicorder drum, and limited metadata information introduces ambiguities that are not typical digital data. Therefore, techniques must developed help characterize uncertainties This article presents an analysis compares corecorded signals from two...
Abstract During the analog era of seismology, seismograms were typically written to paper media. The legacy records from this make up an irreplaceable resource that covers over a century, and many them remain extant in both their original form as microformat copies. While copies drove decades seismological research, new capabilities have been developed allow us revisit data sets extend application contemporary analyses considerably longer record. Though seismogram extensively used, we seek...
Abstract The authors have requested that this preprint be removed from Research Square.
<p>Analog seismograms contain rich and valuable information over nearly a century. However, these analog seismic records are difficult to analyze quantitatively using modern techniques that require digital time series. At the same time, because deteriorating with age need substantial storage space, their future has become uncertain. Conversion of series will allow more conventional access data as well making them available for exciting scientific discovery. The digitization...