'change markedly' is a correct and usable phrase in written English.
It is used to describe a significant change or difference. For example, "The company's sales have changed markedly over the last five years."
After rainwater enters soils, its characteristics change markedly.
Inside cells, however, the properties can change markedly.
Americans' lives probably wouldn't change markedly, he says.
Vocal acoustic parameters did not change markedly except for the maximum phonation time, which decreased significantly.
measurements, the spin density is low and does not change markedly with the potential.
The sonoluminescence spectra does not change markedly with increasing ultrasound power.
A company's problems and solutions tend to change markedly as the number of its employees and its sales volume increase.
Similar to previous reports, the map shows that vessel velocities may change markedly as vessels intersect and bifurcate25.
Spatial patterns of environmental intrusion and material deprivation change markedly over the period, although a clear environmental inequality remains throughout.
Vegetation composition and cover typically change markedly along the gradient of relatively mesic northern aspects to more xeric southern aspects.
1H spin lattice and spin spin NMR relaxation times change markedly during the aging of nitrile rubber elastomers.
