"level upward" is correct and usable in written English.
You can use it when describing a situation in which something is improving or progressing. For example, "Her career has been steadily leveling upward since she accepted the promotion."
There was a dedicated children's library, with books ascending in age range from the floor level upward.
To drape it, about five feet of the straight edge of the fabric was placed against the centre front of the body from ground level upward.
The 11 water rats of the Western Hemisphere are found from southern Mexico into South America, where they typically live along streams in rainforests from sea level upward to mountain pastures above the tree line.
The ability to design coating components from the molecular level upward offers tremendous potential for creating multifunctional coatings.
Aggregation from a detailed level upward may give relief at this point, but what to do if indicator values do not improve any further?
There is a general agreement in that δ15N increases by 2.8 to 3.8 ‰ per trophic level upward (Δδ15N) in freshwater systems (Minagawa and Wada 1984; Post 2002).
Once-weekly dosing with 40,000 IU EPO in intensive care patients gave mean serum levels upward of 800 IU/l in the blood, similar to levels found in healthy controls [ 84, 85].
Her eyes are at belt level, glancing upward fearfully.
It shows a low level of upward mobility about the same as the Czech Republic's.
As the noise level crept upward, Miss R raised her hand high in the air, stared down the biggest talkers, and announced, "And a hush fell over the crowd".
In 1967 the word Boy was dropped from the name of the British organization, and in the 1980s girls were allowed to join at the Cub level and upward.
