Scores of starving baby seabirds have been washing up on Northern California beaches this summer, raising fears among scientists that a climatic cycle like the one that wreaked havoc on sea creatures a few years ago may be moving in. More than 100 undernourished common murre babies have been plucked from beaches from Monterey to Marin County by biologists and volunteers with International Bird Rescue and are being rehabilitated at the organization’s Fairfield center.