Abstract
The effects of climatic elements on wine quantity and quality for the winegrowing region of Tokaj-Hegyalja, Hungary, were analyzed. By applying the Makra test, significant breaks were detected in both the wine quantity and wine quality data sets. Analysis of the relationship between climatic variables and wine quantity and quality, using different statistical methods, confirmed that the most important factors of wine quantity are hours of sunshine in May, June, July, and August and precipitation in September. For wine qualilty, mean temperature, precipitation, and hours of sunshine in May and September play key roles in addition to precipitation in July and hours of sunshine in August. The role of climate in September is most important, since aszú (Botrytis) formation, as an important component of wine quality, depends largely on conditions during September. Results indicate that the significant variables obtained by factor analysis better explain linear relationships between climate and wine quantity and quality than those obtained by the χ2 test. Seven objective vintage climate types were defined using the methods of factor and cluster analysis. Results show that the classification of vintage climate types is more effective in explaining variations in wine quantity than variations in wine quality. Overall, the research identifies the characteristics and importance of the climatic variables with significant relationships with wine quantity and quality in the region. The results are useful in applying quantity and quality assessment strategies for wine production in the region.
- Received September 2008.
- Revision received January 2009.
- Revision received March 2009.
- Accepted May 2009.
- Published online September 2009
- Copyright © 2009 by the American Society for Enology and Viticulture
Sign in for ASEV members
ASEV Members, please sign in at ASEV to access the journal online.
Sign in for Institutional and Non-member Subscribers
Log in using your username and password
Pay Per Article - You may access this article (from the computer you are currently using) for 2 day for US$10.00
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.