Geology and Wine - 13 - Geographic Information System Characterization of Four Appellations in West Texas, USA

Aug 28, 2026

Uploaded by Dozel

Texas produces about 90,000 hl of wine each year from hundreds of wineries and thousands of hectares of vineyards, with eight recognized American Viticultural Areas (AVAs). To support selection of well-adapted grape cultivars, a GIS was built to integrate climatic, geologic, and edaphic datasets for Texas AVAs. The work characterizes four west Texas AVAs by elevation, temperature patterns, precipitation, growing degree-days, ripening-period temperatures, and soil types, explaining how these factors shape vineyard performance.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages15

Reading Time38 min

AccessFree to download

Summary

Geographic Information System (GIS) development

Characterization of four AVAs

Climatic differences and growing parameters

Underlying geology and soils

Wine varieties and production trends

6 SERIES Geology and Wine 13. Geographic Information System Characterization of Four Appellations in West Texas, USA Edward W. Hellman1,2, Elvis A. Takow3, Maria D. Tchakerian3, and Robert N. Coulson3 1Texas A&M University AgriLife Research and Extension Center 1102 East FM 1294 Lubbock, TX, 79403, USA E-mail: [ewhellman@ag.tamu.edu](ewhellman@ag.tamu.edu) 2Department of Plant and Soil Science Texas Tech University 3Knowledge Engineering Laboratory Department of Entomology Texas A&M University College Station, TX 77843 USA SUMMARY Texas produces approximately 90 000 hl of wine annually from more than 200 wineries and 1214 ha of vineyards. Eight wine grape production regions are officially recognized as American Viticultural Areas (AVAs) in Texas. Improved understanding of the growing conditions within each AVA facilitates selection of well-adapted cultivars that is critical for continued success and expansion of the wine industry. A geographic information system (GIS) was developed to enable enhanced characterization of the climatic, geologic and edaphic conditions of Texas AVAs. The GIS contains datasets describing climatic variables, geology, soils, elevation and topography, all of significance to grape production. This paper characterizes the four viticultural areas (AVAs) of west Texas: Texas High Plains AVA, Escondido Valley AVA, Texas Davis Mountains AVA, and Mesilla Valley AVA. Common features of the four AVAs are relatively high elevation, warm to very warm growing-season temperatures, mild winter temperatures, and low annual precipitation. Local differences in elevation and topography modify climatic conditions among AVAs, providing variations in growing degree-days and ripening-period mean temperatures that influence the performance of grape cultivars. The Texas High Plains and Texas Davis Mountains AVAs have the lowest growing degree-days and coolest ripening-period mean temperatures; Escondido Valley and Mesilla Valley AVAs are drier and warmer, resulting in fruit ripening earlier than in the High Plains and Davis Mountains AVAs. Variable underlying geology leads to differing soil types planted to vineyards in each AVA; predominantly loamy fine sands and fine sandy loam in Texas High Plains, silty clay loam and loam in Escondido Valley, loam and clay loam in Texas Davis Mountains, and clay loam and sandy loam in Mesilla Valley. West Texas produces red wines from Cabernet Sauvignon and Merlot cultivars, which are notable for good tannin and excellent colour; recent planting trends to warm-climate cultivars, including Tem- pranillo, Sangiovese, Mourvèdre, and Grenache, are producing blended wines of great promise. Similarly, a solid reputation for white wines from Chenin blanc and Chardonnay is being enhanced by increased production of Viognier, Vermentino, and other warm-climate varietal wines. SOMMAIRE Texas produit environ 90 000 hectolitres de vin par année provenant de plus de 200 établissements vinicoles et 1214 ha de vignes. Huit régions de productions de raisins de cuve sont officiellement reconnues comme zones viticoles américaines (AVA) en Texas. Une meilleure compréhension des conditions de croissance au sein de chacune AVA facilite le choix des variétés,(cultivars) adaptées pour le succès et l’expansion continue de l’industrie viticole. Un système d’information géographique (SIG) a été développé pour permettre la caractérisation améliorée des conditions climatiques, géologiqueset édaphiques de l’AVA de Texas. Le SIG contient les ensembles de données décrivant les variables climatiques, lagéologie, les sols, l’altitude, et topographie d’importances pour la production viticole. Ce document caractérise les quatre Zones viticoles de l’Ouest Texas: Texas High Plains, Escondido Valley, Texas Davis Mountains, et Mesilla Valley. Les caractéristiques communes entre des quatre AVA sont relativement haute altitude, trèschaudes températures de saison decroissance, les températures de l’h

FAQs

What is the purpose of the GIS described in the paper?

The GIS was developed to enhance characterization of climatic, geologic, and edaphic conditions within Texas AVAs so that cultivars can be better selected for success in the wine industry.

Which four west Texas AVAs are characterized?

The paper characterizes Texas High Plains AVA, Escondido Valley AVA, Texas Davis Mountains AVA, and Mesilla Valley AVA.

How do climate and elevation differ among the four AVAs?

All four AVAs tend to have relatively high elevation and warm growing-season temperatures, but local differences in elevation and topography alter growing degree-days and ripening-period mean temperatures, affecting when fruit ripens and how cultivars perform.

Aug 28, 2026

Uploaded by Dozel