The phrase "a backdrop of mounting" is correct and usable in written English.
It can be used to describe a situation or context that is increasingly becoming more intense or significant, often in relation to events or emotions.
Example: "The negotiations took place against a backdrop of mounting tension between the two countries."
Alternatives: "a setting of increasing" or "an environment of escalating".
The match took place at Rangers' Ibrox stadium against a backdrop of mounting sectarianism.
The acceleration comes against a backdrop of mounting security difficulties for the American military in Iraq.
Today's agreement came against a backdrop of mounting frustration in Latin America over recent United States trade policy, widely criticized here as turning increasingly toward protectionism.
PAGE A13 Zimbabwe Arrests Peddlers Against a backdrop of mounting economic collapse, the police in Zimbabwe say they have arrested nearly 15,000 street merchants.
But the new trial, case 002, is taking place against a backdrop of mounting controversy at the tribunal, which has so far cost more than $150m and which took a decade to establish.
It reverberated especially loudly against a backdrop of mounting dissatisfaction — even in this traditionally Roman Catholic country — with what many perceive as the Vatican's inadequate response to the global pedophilia scandal sweeping the clergy.
In the long since darkened green of the Polo Grounds, which the author brightly illuminates, we witness the unfolding of the plot against a backdrop of improbably mounting prowess (of the Giants' 28 home games remaining after the sign stealing began, they won 23).
It comes against the backdrop of mounting revelations about secret surveillance of Americans communications.
Against this backdrop of mounting frustration, the Institute of Medicine, part of the National Academy of Sciences, this month issued a report titled, "Organ Donation: Opportunities for Action".
These new technologies arrive against the backdrop of mounting concerns over security and privacy, as the old ways of verifying identity online have been exposed as risky.
But in contrast to the last time this fight occurred, in 2010-11, in this round the dispute is taking place against the backdrop of mounting law enforcement investigations and whistleblower lawsuits against the industry, greater public awareness of the abuses of these schools and declining enrollments and revenues.
