This isn't measurement of albedo changes. It's measurements of spectra that exhibit Doppler effect, which permits measurement of wind velocity. From the abstrac

This isn't measurement of albedo changes. It's measurements of spectra that exhibit Doppler effect, which permits measurement of wind velocity. From the abstract: "We studied the transmission spectrum of the hot Jupiter WASP-127 b during one transit in the K band with CRIRES+." They acquired spectra for H2O and CO with hi-res transmission spectroscopy as the planet transited its star. https://www.aanda.org/articles/aa/full_html/2025/01/aa50438-24/aa50438-24.html https://www.aanda.org/articles/aa/full_html/2025/01/aa50438-...