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Potential effect of atmospheric warming on grapevine phenology and post-harvest heat accumulation across a range of climates.

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Title: Potential effect of atmospheric warming on grapevine phenology and post-harvest heat accumulation across a range of climates.
Authors: Hall, Andrew ahall@csu.edu.au, Mathews, Adam1, Holzapfel, Bruno2
Source: International Journal of Biometeorology. Sep2016, Vol. 60 Issue 9, p1405-1422. 18p.
Subject Terms: *Climate change, *Viticulture, *Grape growing, *Geographic information systems, *Carbohydrates
Abstract: Carbohydrates are accumulated within the perennial structure of grapevines when their production exceeds the requirements of reproduction and growth. The period between harvest and leaf-fall (the post-harvest period) is a key period for carbohydrate accumulation in relatively warmer grape-growing regions. The level of carbohydrate reserves available for utilisation in the following season has an important effect on canopy growth and yield potential and is therefore an important consideration in vineyard management. In a warming climate, the post-harvest period is lengthening and becoming warmer, evidenced through studies in wine regions worldwide that have correlated recent air temperature increases with changing grapevine phenology. Budbreak, flowering, veraison, and harvest have all been observed to be occurring earlier than in previous decades. Additionally, the final stage of the grapevine phenological cycle, leaf-fall, occurs later. This study explored the potential for increased post-harvest carbohydrate accumulation by modelling heat accumulation following harvest dates for the recent climate (1975-2004) and two warmer climate projections with mean temperature anomalies of +1.26 and +2.61 °C. Summaries of post-harvest heat accumulation between harvest and leaf-fall were produced for each of Australia's Geographical Indications (wine regions) to provide comparisons from the base temperatures to projected warmer conditions across a range of climates. The results indicate that for warmer conditions, all regions observe earlier occurring budbreak and harvest as well as increasing post-harvest growing degree days accumulation before leaf-fall. The level of increase varies depending upon starting climatic condition, with cooler regions experiencing the greatest change. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 117673302
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Potential effect of atmospheric warming on grapevine phenology and post-harvest heat accumulation across a range of climates.
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  Data: <searchLink fieldCode="AR" term="%22Hall%2C+Andrew%22">Hall, Andrew</searchLink><i> ahall@csu.edu.au</i><br /><searchLink fieldCode="AR" term="%22Mathews%2C+Adam%22">Mathews, Adam</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Holzapfel%2C+Bruno%22">Holzapfel, Bruno</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Biometeorology%22">International Journal of Biometeorology</searchLink>. Sep2016, Vol. 60 Issue 9, p1405-1422. 18p.
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  Data: *<searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br />*<searchLink fieldCode="DE" term="%22Viticulture%22">Viticulture</searchLink><br />*<searchLink fieldCode="DE" term="%22Grape+growing%22">Grape growing</searchLink><br />*<searchLink fieldCode="DE" term="%22Geographic+information+systems%22">Geographic information systems</searchLink><br />*<searchLink fieldCode="DE" term="%22Carbohydrates%22">Carbohydrates</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Carbohydrates are accumulated within the perennial structure of grapevines when their production exceeds the requirements of reproduction and growth. The period between harvest and leaf-fall (the post-harvest period) is a key period for carbohydrate accumulation in relatively warmer grape-growing regions. The level of carbohydrate reserves available for utilisation in the following season has an important effect on canopy growth and yield potential and is therefore an important consideration in vineyard management. In a warming climate, the post-harvest period is lengthening and becoming warmer, evidenced through studies in wine regions worldwide that have correlated recent air temperature increases with changing grapevine phenology. Budbreak, flowering, veraison, and harvest have all been observed to be occurring earlier than in previous decades. Additionally, the final stage of the grapevine phenological cycle, leaf-fall, occurs later. This study explored the potential for increased post-harvest carbohydrate accumulation by modelling heat accumulation following harvest dates for the recent climate (1975-2004) and two warmer climate projections with mean temperature anomalies of +1.26 and +2.61 °C. Summaries of post-harvest heat accumulation between harvest and leaf-fall were produced for each of Australia's Geographical Indications (wine regions) to provide comparisons from the base temperatures to projected warmer conditions across a range of climates. The results indicate that for warmer conditions, all regions observe earlier occurring budbreak and harvest as well as increasing post-harvest growing degree days accumulation before leaf-fall. The level of increase varies depending upon starting climatic condition, with cooler regions experiencing the greatest change. [ABSTRACT FROM AUTHOR]
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      – Type: doi
        Value: 10.1007/s00484-016-1133-z
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      – Code: eng
        Text: English
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        PageCount: 18
        StartPage: 1405
    Subjects:
      – SubjectFull: Climate change
        Type: general
      – SubjectFull: Viticulture
        Type: general
      – SubjectFull: Grape growing
        Type: general
      – SubjectFull: Geographic information systems
        Type: general
      – SubjectFull: Carbohydrates
        Type: general
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      – TitleFull: Potential effect of atmospheric warming on grapevine phenology and post-harvest heat accumulation across a range of climates.
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            NameFull: Hall, Andrew
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              M: 09
              Text: Sep2016
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              Y: 2016
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