Greening trends appear associated with smaller seasonal subsidence, thinner active layers, and wetter soil:

Burned areas have higher soil water content than unburned areas:

Lower soil moisture (volumetric water content) is associated with deeper active layers, suggesting that Arctic soil may become drier as the climate warms:

This data set measures subsidence, soil moisture, and active layer thickness of #permafrost at millions of points. This allows us to investigate what processes and relationships from smaller-scale studies hold over larger regions. What do we discover? ⤵️

Happy #AGU24! If you're interested in learning about how InSAR closure phase can be used to measure moisture in soil, vegetation, or wildfire fuel materials, check out my poster Wednesday morning and talk Wednesday evening!

Everything going according to plan in the Sentinel-1C launch so far... excited and hopeful for more InSAR data to come!

Streaming right now at www.esa.int/ESA_Multimed...

We also show that systematic bias in the closure phase can be caused by asymmetries in the time series, where wetting and drying happen at different rates. A more asymmetric time series (wetting is much faster or slower than drying) tends to produce a more "biased" time series.

Estimation of soil moisture is poorer over crop land, likely because of changing vegetation. We characterize the accuracy of our estimate across different land cover types.

We show that cumulative InSAR closure phase can be used to estimate soil moisture at 37 sites, validating with in situ measurements in Oklahoma. The estimates can be quite accurate!

We use a model and real data to show that, because closure phase relates to *changes* in scattering properties, you can *cumulatively sum* a closure phase time series -- as a new way to measure soil moisture!

InSAR closure phase is the result of combining radar signals from satellite overpasses from 3 different times. It's particularly sensitive to changing scattering properties on the ground, such as changes in soil moisture.

Going to IEEE #IGARSS2024?

Come say hi - and check out my presentation on measuring changes in vegetation moisture from InSAR closure phase! Tuesday, 11:40 in the Student Paper Competition session 😎🛰🌲

…Or to come to watch me present, also tomorrow (Tues) 9:10-9:20 a.m., on what the results from the @ABoVE Permafrost Dynamics Observatory can tell us about the dynamic active layer soil moisture, and greening and browning

AGU23 has me wishing I could split myself in half!
 
Tomorrow (Tues) from 9:10-9:20 a.m., I encourage you to watch my advisor discuss our work on modelling InSAR closure phase to measure high-resolution soil moisture…

Voting for this year's AGU mascot name is open, and my office mate's adorable name suggestion, Stella, made it to the final round! Vote here to make Stella the Sea Lion the 2023 AGU mascot! brnw.ch/21wEScL