The phrase "are markedly higher" is correct and usable in written English.
It can be used to compare quantities or levels, indicating that one is significantly greater than another.
Example: "The temperatures recorded this summer are markedly higher than those of previous years."
Alternatives: "are significantly greater" or "are considerably elevated."
"The hopes are markedly higher," said Quincy M. Krosby, a markets strategist at Prudential Financial.
In both cases, modern erosion rates are markedly higher than either soil formation rates or natural erosion rates measured here.
The conductivity values of these materials are markedly higher than those previously reported for other t+ = 1 materials.
One of the most disquieting aspects of our research is that prevalence estimates for sexual coercion are markedly higher than those for rape in the Crime Survey for England and Wales.
This stage is followed by initiation, propagation and growth of localized helical bands inside which strain and temperature increases are markedly higher than in the surrounding regions.
Subsequent sorption experiments at very low penetrant activity reveal solubility coefficients that are markedly higher in the penetrant-crystallized sample than in the initially highly amorphous sample.
Encouraging results have been obtained with the TFSI anion as the conductivities are markedly higher than those involving the same cations with other anions.
Though statins are fully reimbursed by the public drug programs for seniors in British Columbia (BC) and Ontario, Canada, population-based rates of statin prescription are markedly higher in Ontario.
Eighty to eighty-five percent (mol%) of oil conversion and up to 90% (mol%) of total DG yield (73%, wt%) were obtained, which are markedly higher than those previously reported.
Values this year are markedly higher than in 2015.
Correlations between observations and predictions are markedly higher if the latter are generated in a 3-D model.
