"deeper contribution" is correct and usable in written English.
You can use it when you are referring to a larger or more meaningful contribution than has been made previously. For example, "The author made a deeper contribution to the field of psychology with their groundbreaking research.”.
By the end of the century, however, it was generally recognized that Karl von Staudt (1798 1867), who worked in relative isolation at the University of Erlangen, had made far deeper contributions to a systematic theory of pure geometry.
The existence of three different geochemical populations indicates that there are at least two different mechanisms of degassing through the lake surface, and supports the hypothesis of a deep contribution at Katanuma lake.
The amended Island Rule and the model simulation confirmed that the weakening of the ITF transport in the future climate is mostly attributed to the slowdown of the deep upwelling in the Pacific, which implies that the deep contribution to the ITF will be weakening in the future warm climate, influenced by stronger near water column stratification and reduction of deep water formation rate.
The renowned physicist who missed his 70th birthday celebrations through illness in January, has won the Special Fundamental Physics Prize for a lifetime of achievements, including the discovery that black holes emit radiation, and his deep contributions to quantum gravity and aspects of the early universe.
Most Senate Democrats, keenly aware of big business's deep campaign contribution pockets, are eager to go along.
But while his productions, whether large-scale or intimate, were consummately crafted works of total theatre, it is their choreography that drew from Béjart his deepest creative contribution.
The lakes differed substantially with respect to damping behaviour, indicating different impacts of deep groundwater contribution.
These changes are linked to several processes including vertical deformation, underground water redistribution (soil water content + water table), and possibly deeper geothermal contributions.
It is noteworthy that the level of Cl, which is considered a proxy of deep hydrothermal contribution, was not high when the volcano was erupting but became higher later.
Data on 226Ra, 222Rn and salinity obtained in summer 2007 revealed that the deep groundwater contribution was 15% of the total water inflow, whereas the shallow and intermediate flow paths represented 32%and48%8%, respectively.
