The phrase "a series of existing" is correct and usable in written English.
It can be used when referring to multiple items or elements that are already present or available.
Example: "The report analyzes a series of existing studies on climate change impacts."
Alternatives: "a collection of existing" or "a number of existing".
4. Research and compile a series of existing stories on mythological creatures.
The manifesto consists largely of a series of existing laws that will be abrogated on taking power, plus a bit of ecology (Grillo is almost messianic about the environment) and a good dose of euroscepticism.
The report said greenhouse gases were already responsible for a series of existing problems, including fewer cold days, hotter nights, intense heatwaves, floods and heavy rains, droughts and an increase in the strength of hurricanes and tropical storms.
Aim of the present paper is the analysis of a series of existing masonry cross vaults exhibiting meaningful structural deterioration and diffused crack patterns, by means of an advanced non-linear and limit analysis software.
When reconfigured into a cohesive system, a series of existing digital technologies may facilitate disassembly, take back and reuse of structural steel components, thereby improving resource efficiency and opening up new business paradigms.
"So we ended up going through a series of existing pieces I'd written for films and other projects," Nyman adds, "and David used each of them to provide the basis for a series of songs, in a way, creating his own mental painting around the music".
The New York Times now reports that "the Pentagon has proposed a new plan to the White House to build up a string of military bases in Africa" and beyond, "bring[ing] an ad hoc series of existing bases into one coherent system that would be able to confront regional threats from the Islamic State, Al Qaeda, or other terrorist groups".
The new approach would try to bring an ad hoc series of existing bases into one coherent system that would be able to confront regional threats from the Islamic State, Al Qaeda or other terrorist groups — including possible attacks against American embassies, like the assault on the diplomatic compound in Benghazi, Libya, in 2012.
The rough plan, released earlier this month, calls for more than three dozen mass transit and highway improvements over the next four decades, including a rail tunnel through the Sepulveda Pass, the San Fernando Valley's first light-rail line, and a series of extensions of existing routes.
New series of existing major shows such as Downton and Mr Selfridge will not debut on ITV Encore, but the broadcaster hopes it can nurture future hits on the pay channel.
Deben wrote: "The government has made a series of announcements about existing low-carbon policies.
