Carneros is one of California's key wine producing regions, situated close to the Pacific coast. Although Carneros is relatively young, having been first used for viticulture in the 1940's, it has proven to be a highly successful region, capable of growing high quality grapes and producing wines of real character and distinction. Unlike many other regions of California, Carneros is considerably cooler, and benefits from the tempering effect of Pacific fog on the vineyards. As a direct result of this, Carneros wineries are able to produce fine grape varietals which require cooler temperatures, such as Chardonnay and Pinot Noir – grapes perfect for the sparkling wines the region has become famous for. However, plenty of still red and white wines are made in the region, from a wide array of grape varietals. The green skinned grapes of the Sauvignon Blanc varietal had their origins in Southern France, where they are still widely grown and used for many of the excellent young and aged white wines the region is famous for. Today, however, they are grown in almost every wine producing country in the world, and are widely revered for their fresh and grassy flavors, full of tropical notes and refreshing, zesty character. Sauvignon Blanc grapes thrive best in moderate climates, and ripen relatively early in the year. This has made them a favorite for many wineries in the New World, where they can still produce healthy and high yields in the earlier part of the summer before the temperatures become too hot. Too much heat has a massively adverse effect on Sauvignon Blanc, as the grapes become dull in their flavor, and the wine produced from them loses all its unique character and high points. As such, Sauvignon Blanc farmers have had a lot of trouble from global warming and climate change, as they are being forced to harvest their crops increasingly earlier in the year when it is cool enough to do so.