"increasing salience" is correct and can be used in written English.
You can use it to refer to something becoming more important, noticeable, or relevant over time. For example, "The issue of climate change has been increasing in salience in the media."
The discomfort with English identity carries to the very top of government, where its increasing salience sheds awkward light on the prime minister's own Scottish background.
Glocalization indicates that the growing importance of continental and global levels is occurring together with the increasing salience of local and regional levels.
The increasing salience of education provides Democrats with an effective means of countering the problem of an underperforming economy, as President Obama demonstrated in a speech on Feb. 27: "We can't allow higher education to be a luxury in this country.
The increasing salience and widespread character of globalisation interconnects socio-political contexts and agents in disparate locations [16].
Emerging empirical research foci include: European identity; the effect of new communications technologies, particularly the Internet, on public discourse; increasing salience of Europe/America comparisons; and the growing importance of 'memory' studies as Europe struggles to shape a vision of and program for its future.
Similar to previous experiments, the results show a marked effect of coherence and duration, and performance improved with increasing salience of the figures with listeners reaching hit rates of 89 ± 5% for the most salient condition.
Localization, in politics, the emphasis or increased salience of locality.
Although Mr. Romney's opponents have more ammunition against him this year than they did in 2008 because of the increased salience of his health care bill, his experience has allowed him to become more effective at deflecting these attacks.
Brighter coloration indicates increased salience.
This may be due to an increased salience of medicines for symptomatic conditions over those for asymptomatic conditions, with participants more aware of medications that have a more noticeable effect on daily functioning.
In addition, some districts that did not practice pension-spiking prior to the reform appear to begin providing payments up to the new, lower limit, perhaps due to increased salience of the fiscal incentive.
