Weather conditions associated with grape production in the Okanagan Valley of British Columbia and potential impact of climate change

Caprio, Joseph M.; Quamme, H. A.

doi:10.4141/p01-160

Cited by 51 publications

(44 citation statements)

References 14 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This method has been applied to analyses of the impact of weather on yields of wheat (Kalma et al 1992), apple (Caprio and Quamme 1999) and grape (Caprio and Quamme 2002). The method compares the daily weather records of years with high and low yields against the record of "normal" years.…”

Section: Iterative Chi-square Analysismentioning

confidence: 99%

Impact of high air temperatures on Brassicacae crops in southern Ontario

Warland¹,

McKeown²,

McDonald³

2006

Can. J. Plant Sci.

View full text Add to dashboard Cite

. 2006. Impact of high air temperatures on Brassicaceae crops in southern Ontario. Can. J. Plant Sci. 86: 1209-1215. The yield patterns of many cool season vegetable crops were observed to be different from the gradual increase in yields that has been reported over time for corn and soybeans in Ontario. A study was conducted to determine if there was a relationship between yield and seasonal weather patterns for five vegetables (broccoli, cabbage, cauliflower, radish and rutabaga) in the family Brassicaceae. The iterative chi-squared technique was used to identify correlations between daily temperature and marketable yield. Yields of all five of the crops showed some damage due to hot weather in August. For cauliflower, cabbage and rutabaga there was roughly a 10% yield loss for every 10 d that the temperature reached 30°C or above during the growing season. These results shed new insight into the mechanisms by which weather affects yield. Mots clés: Chou, brocoli, chou-fleur, radis, rutabaga, rendement, climat Marketable yields of vegetable crops in Ontario increased steadily from 1940 to the mid 1980s, then levelled off or decreased and became highly variable (McKeown et al. 2005). By contrast, yields of corn and soybean in Ontario increased linearly over this period (McKeown et al. 2005). Interactions between seasonal climate and yields of a variety of vegetables in southern Ontario were more complex than could be described by the mean temperature and precipitation in each growing season (McKeown et al. 2005). Cabbage, cauliflower, potato and rutabaga showed negative correlations between yield and the number of days in the growing season above 30°C. For rutabaga, yields were negatively correlated with the mean growing season temperature. Yields of cabbage, onion and rutabaga were positively correlated with the number of days of rain during the growing season, but were not related to total growing season precipitation (McKeown et al. 2005). The iterative chi-square technique of Caprio (1966) was useful in identifying correlations between the timing of synoptic weather events and years with high and low yield (McKeown et al. 2005). For example, cabbage showed a strong positive correlation between years with low yields and an abnormally high number of days with the maximum temperature above 32°C in August. While a generally warm summer will not necessarily harm cabbage, a heat wave in August can reduce yields.Previous analysis of the impact of growing season weather on vegetable yields in southern Ontario (McKeown et al. 2005) showed a pattern of mild and stable growing seasons from about 1961 to 1986, followed by a more variable conditions from 1987 onwards, with greater a frequency of hot days. High inter-annual variablility of yield can affect cultivar selection, area to plant, forecasting of supply, scheduling of harvest, and economics of production. The ability to predict yields and timing of harvest is becoming increasingly important (Everaarts 1999), especially as harvests need to be scheduled to provide ...

show abstract

Section: Iterative Chi-square Analysismentioning

confidence: 99%

Impact of high air temperatures on Brassicacae crops in southern Ontario

Warland¹,

McKeown²,

McDonald³

2006

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…Spring frost and winter freezes have had an important influence on stone fruit production in the Okanagan Valley (Krueger 1983) but their relative impacts on production and the time of year that the impact is greatest have not been not fully determined. An association of temperature with production in the pre-harvest year was found for apple (Caprio and Quamme 1999) and grape production (Caprio and Quamme 2002) in the Okanagan Valley of British Columbia that could be explained by the effects on flower initiation and formation but it is unknown if such an association exists for peach, apricot and cherry. During spring and summer of the harvest year, temperature was found to have both negative and positive effects on apple (Caprio and Quamme 1999) and grape production (Caprio and Quamme 2002).…”

mentioning

confidence: 99%

“…An association of temperature with production in the pre-harvest year was found for apple (Caprio and Quamme 1999) and grape production (Caprio and Quamme 2002) in the Okanagan Valley of British Columbia that could be explained by the effects on flower initiation and formation but it is unknown if such an association exists for peach, apricot and cherry. During spring and summer of the harvest year, temperature was found to have both negative and positive effects on apple (Caprio and Quamme 1999) and grape production (Caprio and Quamme 2002). Although all fruit crops in the Okanagan Valley are irrigated, the association between rainfall and production is of interest.…”

mentioning

confidence: 99%

“…The technique was subsequently applied to identify periods of weather that critically impacted small grain and rangeland production in Montana (Caprio and Williams 1973) and the conditions that contribute to winterkill of winter wheat (Caprio and Snyder 1984;Kalma et al 1992). The statistical procedure was also adapted to determine the association of daily weather occurrences with apple (Caprio and Quamme 1999) and grape (Caprio and Quamme 2002) production in British Columbia and with tree ring growth in Arizona (Caprio et al 2003). The elucidation of crop-weather associations using the iterative χ 2 statistical method can help to determine cause and effect relations.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Influence of weather on apricot, peach and sweet cherry production in the Okanagan Valley of British Columbia

Caprio¹,

Quamme²

2006

Can. J. Plant Sci.

Self Cite

View full text Add to dashboard Cite

Caprio, J. M. and Quamme, H. A. 2006. Influence of weather on apricot, peach and sweet cherry production in the Okanagan Valley of British Columbia. Can. J. Plant Sci. 86: 259-267. An iterative χ 2 method that generates indices of association was used to determine daily weather occurrences associated with annual variations in peach (Prunus persica Batch.), apricot (Prunus armeniaca L.), and sweet cherry production (Prunus avium L.) in the Okanagan Valley of British Columbia over a 72 yr period, 1920-1991. During September and early October of the pre-harvest year, warm daytime temperatures favoured apricot (≥ 26°C) and sweet cherry production (≥ 19°C), probably because this promoted flower bud development. High daytime temperatures (≥ 27°C) were detrimental to apricot production in August of the pre-harvest year. During the pre-harvest year, peach production was only weakly associated with daytime temperature. Precipitation adversely affected peach and sweet cherry production in the preharvest year indirectly by associated lower temperatures or directly by enhanced disease infection. The main climatic factor limiting production of these crops was low temperatures from November to February (critical value range, ≥ -13 to ≥ -24°C, nighttime temperature) that cause winter injury. Precipitation during this period, usually snowfall, mostly favoured production. Poor production years were also associated with low nighttime temperatures (≤ -2 to -5°C) in spring at the time the flowers are prone to frost injury. During the bloom period warm temperatures (≥16°C, daytime temperature) favoured Prunus production, probably because of the temperature requirements for good pollination and flower set. Rainfall during fruit development and harvest of sweet cherry reduced production because of rain-induced cracking. Daytime temperatures were detrimental to production of apricot (≥ 31°C) and sweet cherry (≥ 33°C to ≥ 37°C) during harvest. The anticipated climate change appears to favour Prunus production in the Okanagan Valley, except for increased rainfall on sweet cherry production. En revanche, une température diurne élevée (≥ 27°C) au mois d'août l'année précédant la récolte nuit à la production d'abricots. La production de pêches n'est que très faiblement associée aux températures diurnes de l'année précédant la récolte. Les précipita-tions pendant l'année qui précède la récolte ont une incidence néfaste sur la production de pêches et de cerises douces, soit indirectement à cause de la baisse de température qui s'y associe, soit directement par la recrudescence des maladies. Le principal facteur climatique qui réduit la production de ces fruits est la baisse de température survenant de novembre à février (fourchette critique de ≤ -13°C à ≤ -24°C la nuit), à l'origine des dommages hivernaux. Les précipitations durant cette période (habituellement sous forme de neige) favorisent passablement la production. Les années les moins productives sont également associées à des températures fraîches la nuit (≤ -2°C à ≤ -5°C), au printemp...

show abstract

“…Three-week running averages of these weekly values were calculated. We then divided these weekly values of the difference in the number of extreme days per week by 7 (number of days per week), giving the average number (in fractions of a day) of extreme occurrences per day, and multiplied by 100 (Caprio et al 2009 (2003, 2009) and Caprio & Quamme (1999, 2002, 2006. …”

mentioning

confidence: 99%

Detection of recent climate change using daily temperature extremes in Khorasan Province, Iran

Sanjani¹,

Bannayan²,

Kamyabnejad³

2011

Clim. Res.

View full text Add to dashboard Cite

Climate change is considered one of the main environmental concerns of the 21st century. Increased variation and changes in mean temperature and precipitation are expected to dominate future changes in climate and affect crop productivity. It is highly important to identify regions vulnerable to climate change and to identify suitable adaptation practices that can sustain productivity to some extent. In the present study, an iterative χ 2 method was applied to detect recent possible climate change in extreme daily minimum and maximum temperatures for 5 different regions (Birjand, Boujnord, Mashhad, Sabzevar and Torbat Heydarieh) in Khorasan Province, Iran, during a recent 15 yr period and a prior 30 yr period. The method determines the values of extreme daily temperature that are most significantly different between the prior and recent periods and gives a measure of the weekly significance of that difference. We determined the percentage change in the frequency of the number of extreme days for each period of continuous significant weeks. In all 5 regions, a few days of extreme low minimum temperature (especially in Mashhad and Sabzevar) were experienced during the recent period. The major changes in climate for minimum temperature were determined in Mashhad. In this region the highest percentage change of climate (min. temperature) occurred during Week 33, when a 41% decrease of extreme low minimum temperatures occurred. In Mashhad the highest warming (decrease in days of min. temperature) occurred during late March to late December. Among 5 regions during the recent period some weeks experienced a greater number of days of extreme high maximum temperature (except Torbat Heydarieh and Birjand). In Torbat Heydarieh, the highest percentage change occurred during Week 24, when a 26% decrease of extreme high maximum temperatures was detected. In Torbat Heydarieh, the highest cooling occurred from April to early December. KEY WORDS: Global climate change · Daily minimum and maximum temperature · Temperature variability Resale or republication not permitted without written consent of the publisherClim Res 49: [247][248][249][250][251][252][253][254] 2011 ability have pointed to the conclusion that increased annual variability of weather, as expected due to global warming, causes increased variation of yields (Porter & Semenov 2005, Laux et al. 2010, Bannayan et al. 2011. Developing countries are more vulnerable to climate change than developed countries because of the predominance of agriculture in their economies, the scarcity of capital for adaptation measures, and their heightened exposure to extreme events (Parry et al. 2001).There is a need to identify vulnerable district or agroclimatic regions to climate change and identify suitable adaptation practices that can, to some ex tent, sustain the productivity of these regions. Several studies have focused on the detection of pos sible climate change in Iran, especially in Khorasan Province. Kousari & Asadi Zarch (2010) used the Mann-Kendall test to in...

show abstract

Weather conditions associated with grape production in the Okanagan Valley of British Columbia and potential impact of climate change

Cited by 51 publications

References 14 publications

Impact of high air temperatures on Brassicacae crops in southern Ontario

Impact of high air temperatures on Brassicacae crops in southern Ontario

Influence of weather on apricot, peach and sweet cherry production in the Okanagan Valley of British Columbia

Detection of recent climate change using daily temperature extremes in Khorasan Province, Iran

Contact Info

Product

Resources

About

Weather conditions associated with grape production in the Okanagan Valley of British Columbia and potential impact of climate change

Cited by 51 publications

References 14 publications

Impact of high air temperatures on Brassicacae crops in southern Ontario

Impact of high air temperatures on Brassicacae crops in southern Ontario

Influence of weather on apricot, peach and sweet cherry production in the Okanagan Valley of British Columbia

Detection of recent climate change using daily ­temperature extremes in Khorasan Province, Iran

Contact Info

Product

Resources

About

Detection of recent climate change using daily temperature extremes in Khorasan Province, Iran