A climatic classification of plant hardiness in the United States and Canada

DeGaetano, Arthur T.; Shulman, Mark D.

doi:10.1016/0168-1923(90)90117-o

Cited by 37 publications

(26 citation statements)

References 10 publications

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“…CA is an effective statistical tool for grouping stations into climatologically homogeneous regions (DeGaetano & Shulman 1990, Ahmed 1997, DeGaetano 2001 and for grouping time periods into clusters that reflect the occurrence of weather events or patterns (Ramos 2001). The purpose of CA is to place objects into groups not defined previously, so that objects in a given cluster suggested by the data tend to be similar to each other in some sense, and objects in different clusters tend to be dissimilar.…”

Section: Regionalization Of Winter Rainfall In Spainmentioning

confidence: 99%

Impacts of the North Atlantic Oscillation on the probability of dry and wet winters in Spain

Muñoz-Díaz¹,

Rodrigo²

2004

Clim. Res.

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In many regions of the world, agricultural and water management is usually based on probabilities of seasonal or monthly rainfall, commonly grouped into 3 categories: drought, normal rainfall, and abundant rainfall. Changes in the probabilities of the occurrence of rainfall amounts within these climatic rainfall categories will influence decision-making by farmers and water managers. This study explores the changes induced by the North Atlantic Oscillation (NAO) on the probability of winter rainfall in Spain. The evolution of the NAO was divided into 3 phases: negative NAO (NAO-), neutral NAO (NAOn), and positive NAO (NAO+), and rainfall series were divided into 3 groups corresponding to each NAO phase. Resulting empirical distribution functions allow an estimate of the changes in the probabilities of wet and dry winters due to changes in the NAO phase. Changes in the probability of the occurrence of the rainfall categories are more complex than mere increases in rainfall amount during NAO-and decreases during NAO+ phase. The spatial distribution of impacts is asymmetric, with higher probability of extremes linked to NAO-in the western area of the Iberian Peninsula. KEY WORDS: North Atlantic Oscillation · Rainfall · SpainResale or republication not permitted without written consent of the publisher

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Section: Regionalization Of Winter Rainfall In Spainmentioning

confidence: 99%

Impacts of the North Atlantic Oscillation on the probability of dry and wet winters in Spain

Muñoz-Díaz¹,

Rodrigo²

2004

Clim. Res.

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“…Cluster analysis (CA) is one of the most useful tasks in the data mining process for discovering groups and identifying interesting patterns in the underlying data (Halkidi et al, 2001). It has come to be recognized as an effective statistical tool to deal with tasks for grouping stations into climatologically homogeneous regions (DeGaetano and Shulman, 1990;Ahmed, 1997;DeGaetano, 2001), or for grouping time periods into clusters that reflect the occurrence of weather events or patterns (Ramos, 2001). The purpose of CA is to place objects into groups suggested by the data, not defined previously, so that objects in a given cluster tend to be similar to each other in some sense, and objects in different clusters tend to be dissimilar.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal patterns of seasonal rainfall in Spain (1912-2000) using cluster and principal component analysis: comparison

2004

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Abstract. In this work, cluster and principal component analysis are used to divide Spain in a limited number of climatically homogeneous zones, based on seasonal rainfall for 32 Spanish localities for the period 1912-2000. Using the hierarchical technique of clustering Ward's method, three clusters have been obtained in winter and spring, and four clusters have been obtained in summer and autumn. Results are similar to those obtained by applying principal component analysis. Centroid series of each cluster and principal component series of each EOF have been compared to analyze the temporal patterns. The comparison of both methods indicates that cluster analysis is suitable to establish spatiotemporal patterns of seasonal rainfall distribution in Spain.

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“…In reality, plant survival is likely to be influenced by many factors including snow cover and winter rainfall (DeGaetano & Shulman, 1990;Oullett & Sherk, 1967;McKenney et al, 2001). Plant Hardiness zones are likely to be only a broad surrogate for potential plant distributions (McKenney et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Global plant hardiness zones for phytosanitary risk analysis

Magarey

Borchert²,

Schlegel³

2008

Sci. agric. (Piracicaba, Braz.)

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Plant hardiness zones are widely used for selection of perennial plants and for phytosanitary risk analysis. The most widely used definition of plant hardiness zones (United States Department of Agriculture National Arboretum) is based on average annual extreme minimum temperature. There is a need for a global plant hardiness map to standardize the comparison of zones for phytosanitary risk analysis. Two data sets were used to create global hardiness zones: i) Climate Research Unit (CRU) 1973-2002 monthly data set; and ii) the Daily Global Historical Climatology Network (GHCN). The CRU monthly data set was downscaled to five-minute resolution and a cubic spline was used to convert the monthly values into daily values. The GHCN data were subjected to a number of quality control measures prior to analysis. Least squares regression relationships were developed using GHCN and derived lowest average daily minimum temperature data and average annual extreme minimum temperatures. Error estimate statistics were calculated from the numerical difference between the estimated value for the grid and the station. The mean absolute error for annual extreme minimum temperature was 1.9ºC (3.5ºF) and 2/3 of the stations were classified into the correct zone.

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A climatic classification of plant hardiness in the United States and Canada

Cited by 37 publications

References 10 publications

Impacts of the North Atlantic Oscillation on the probability of dry and wet winters in Spain

Impacts of the North Atlantic Oscillation on the probability of dry and wet winters in Spain

Spatio-temporal patterns of seasonal rainfall in Spain (1912-2000) using cluster and principal component analysis: comparison

Global plant hardiness zones for phytosanitary risk analysis

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