Unraveling the Regional Specificities of Malbec Wines from Mendoza, Argentina, and from Northern California
Unraveling the Regional Specificities of Malbec Wines from Mendoza, Argentina, and from Northern California
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DOI：
10.3390/agronomy9050234
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发表时间：
2019-05-01
期刊：
影响因子：
3.7
通讯作者：
Koehl, Patrice
中科院分区：
文献类型：
--
作者：
Fushing, Hsieh;Lee, Olivia;Koehl, Patrice
本研究探讨了葡萄酒的化学和感官特性与其生产地区之间的关系。目的是确定这些特征是否足够重要，足以作为葡萄酒风土的标志，从而支持区域性的概念。我们认为，所研究的一套葡萄酒的特点和生产区域之间的关系变得复杂的特点本身之间可能的非线性关系。因此，我们提出了一种新的方法来执行依赖于这些关系的葡萄酒数据的分析，而不是试图绕过它们。这种新方法遵循两个步骤：我们首先独立地对每个特征（化学或感官）的测量进行聚类。然后，我们将两个特征之间的距离指定为它们生成的聚类结果的互熵。然后使用该距离度量对特征集进行聚类。该聚类的结果是一组特征子组，使得同一组中的两个特征携带相似的，即，关于所研究的葡萄酒的协同信息。然后，这些葡萄酒根据不同的特征分组进行单独分析。我们使用这种方法来分析阿根廷和加州的马尔贝克葡萄酒之间的相似性和差异，以及这两个主要葡萄酒生产国的子区域之间的相似性和差异。我们报告检测组的特征，其特征在于在研究中包括的不同的葡萄酒的起源。我们注意到阿根廷马尔贝克葡萄酒的区域性比加州葡萄酒更强的证据，至少在本研究中包括的生产子区域。
This study explores the relationships between chemical and sensory characteristics of wines in connection with their regions of production. The objective is to identify whether such characteristics are significant enough to serve as signatures of a terroir for wines, thereby supporting the concept of regionality. We argue that the relationships between characteristics and regions of production for the set of wines under study are rendered complicated by possible non-linear relationships between the characteristics themselves. Consequently, we propose a new approach for performing the analysis of the wine data that relies on these relationships instead of trying to circumvent them. This new approach follows two steps: We first cluster the measurements for each characteristic (chemical, or sensory) independently. We then assign a distance between two features to be the mutual entropy of the clustering results they generate. The set of characteristics is then clustered using this distance measure. The result of this clustering is a set of sub-groups of characteristics, such that two characteristics in the same group carry similar, i.e., synergetic information with respect to the wines under study. Those wines are then analyzed separately on the different sub groups of features. We have used this method to analyze the similarities and differences between Malbec wines from Argentina and California, as well as the similarities and differences between sub-regions of those two main wine producing countries. We report detection of groups of features that characterize the origins of the different wines included in the study. We note stronger evidence of regionality for Argentinian Malbec wines than for Californian wines, at least for the sub regions of production included in this study.