"a high uncertainty" is correct and usable in written English.
You can use it to refer to a situation with large vagueness or unpredictability. For example: "The results of the election have caused a high uncertainty in the future of the country."
Our results are therefore associated with a high uncertainty.
"We're still in a high uncertainty period where we get fits and starts," he said.
For that complexity, planning and construction processes are fraught with a high uncertainty.
We explore how transitions from a high uncertainty environment (reciprocal exchange) to lower-uncertainty environments (nonbinding or binding negotiated exchange) affect the level of trust among exchange partners.
It is obvious that a high uncertainty exists when estimating impact specific indicator values over operation times of decades.
This disparity of recycling processes adopted worldwide resulted in a high uncertainty on the EoL treatment processes that will be adopted for discarded electronic products.
Research which explores unchartered waters has a high potential for major impact but also carries a higher uncertainty of having impact.
Although tritium self-sufficiency was shown, the tritium breeding performance of the current design calls for further design improvements to arrive at a higher uncertainty margin.
This fact implies more missing detections and a higher uncertainty in the object behavior, and consequently a greater complexity.
However, the future outdoor climate data of for the far future have a higher uncertainty than the near future data.
Research based on ideas new to a field has "a high potential for major impact but also carries a higher uncertainty of having impact" because it can be slow to gain attention, the authors write.
