Climate scientist tells Yachats planning commission climate projections could reduce summer streamflows

Mark Green, who identified himself as an atmospheric scientist and emeritus research professor, told the commission he based remarks on the 7th Oregon Climate Assessment and warned of higher summer temperatures, reduced April–September precipitation and more frequent droughts for the Lincoln County coast. He said those trends make late-summer streamflows in Reedy and Salem creeks more likely to be inadequate in future decades.

Green urged the commission to do more than note the projections: he recommended converting downscaled climate-model outputs into projected streamflow numbers so planners can compare future supply against projected demand. "If where it's sufficient now, it may not be sufficient in the future," Green said. Chair Mark Sakamoto and others acknowledged the value of that step and asked Green to share sources; commissioners said translating projections into concrete flow and per-capita demand numbers will likely require larger-scale modeling or assistance from authors of the climate assessment.

The commission agreed to accept materials Green offers for distribution and discussed whether the issue needs to be elevated beyond the planning commission to city staff or regional agencies. No formal directive or funding decision was made at the meeting.