Regional effects of global warming vary in nature. Some are the result of a generalised global change, such as rising temperature, resulting in local effects, such as melting ice. In other cases, a change may be related to a change in a particular ocean current or weather system.
In general, white wines exhibit more acidity than red wines. Acidity gives wine its crispness on the palate. A dry wine needs good levels of acid to provide liveliness and balance; sweet wine needs acidity so it does not seem cloying. Too much acidity will make the wine seem harsh or bitter; too little and the wine will seem flabby and dull.
A dry wine is produced when all of the grape sugars are fermented into alcohol. Some dry wines may have a touch of. to add body but not sweetness. Semi-Sweet. (aka Off Dry) A semi-sweet wine leaves a touch of the sugars in a wine usually to complement acidity and/or aromatics in wine.