Hughes and Williams 2010 (PDF) treated sea level spectra as light spectra. I and my co-authors applied their methodology to GRACE, revealing the first “full color” GRACE maps and comparing them to the Noah/GLDAS water storage model. (more…)
The Weather Channel’s Secrets of the Earth aired an episode called Gravity (backup). In it, I described gravity and discussed GRACE, mantle convection, and climate change.
My more nuanced attribution statement didn’t make the cut: “Melting ice is what we expect in a warming world, and most of the warming since 1950 is very likely due to our CO2 emissions.”
Also, melting sea ice doesn’t affect gravity because it’s already floating. GRACE can only detect changes in land ice. (more…)
This research was presented at the 2012 AGU Fall Meeting and published in 2015. Here are data for some of the paper’s figures
The Pasadena Star-News asked for an op-ed focusing on local solutions to global warming. Another website reposted my article while adding links and pictures. (more…)
I answered some questions about climate change and GRACE. You may want to search for my pseudonym “khayman80” to skip the irrelevant arguments.
At the 2012 JPL open house, I explained how GRACE detects Greenland mass loss, etc.
My previous research into Arctic ocean tides has been extended to solve for global ocean tides using GRACE satellite acceleration data. This research was presented at the 2011 Fall AGU and the 2012 Ocean Sciences conferences. (more…)
I’m a scientist at the University of Colorado studying ocean tides. Before I started this research project, all I knew about the tides was what I’d seen at the beach. We can watch the tide flow in and out every 12 hours at the beach, but this only tells us about the tide at that one beach. I’m trying to measure how big the tides are everywhere in the ocean, at all the beaches in the world and even in the middle of the open ocean.
What makes this possible is a satellite system called GRACE (Gravity Recovery And Climate Experiment). GRACE is a set of 2 satellites flying over the Earth measuring how strong gravity is at each point on the Earth’s surface. (more…)
From 2007 to 2011, I used GRACE satellite acceleration data to recover Arctic ocean tides. My advisor Prof. John Wahr provided invaluable guidance, as did our colleagues from JPL: Dr. Shailen Desai, Dr. Dah-Ning Yuan and Dr. Michael Watkins.
Here’s the source code. (more…)
At the physics department of the University of Colorado and CIRES, I worked with Dr. Sean Swenson, Dr. John Wahr and Dr. Matt Rodell to study large-scale hydrology using GRACE measurements of Earth’s time-variable gravity field. (more…)
While working at the Oregon Center for Optics, I studied transverse spatial Wigner functions of light with Dr. Michael Raymer and Dr. Brian Smith. (more…)
When I arrived at the University of Oregon, Dr. Rudy Hwa had been studying EEG signals for some time. He was looking for a way to use these signals to diagnose ischemic strokes. MRI scanners can already do this, but they’re much more expensive and much less portable than a skullcap of electrodes. (more…)
