The Carneros AVA is shared by both Sonoma and Napa. Carneros dips over rolling hills right down to the San Pablo Bay, (part of the San Francisco Bay). Maritime influences, including cool fog and chilly winds, are at the heart of its microclimate. The fog and breezes filter the intense California sunshine, slowing maturity and lengthening hang time. Soil types are extremely varied in the Carneros; in one Napa vineyard, Winery Lake, seven different types have been identified, including one, Haire, found nowhere else in the world. Carneros produces elegant Chardonnay and stylish Pinot Noir, with some Sauvignon Blanc and Merlot. Grapes from the Carneros are particularly suited to sparkling winemaking as well, as the cool temperature helps impart the higher acidity and bright fruit desired for sparkling California wine.