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Related Concept Videos

What is Climate?01:16

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
Global Climate Change01:50

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
Microbes and Climate Change01:27

Microbes and Climate Change

Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
Responses to Drought and Flooding02:41

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

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Related Experiment Video

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Simulating Temperature in a Soil Incubation Experiment
08:39

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Published on: October 28, 2022

Berry composition and climate: responses and empirical models.

Nyamdorj N Barnuud, Ayalsew Zerihun, Mark Gibberd

    International Journal of Biometeorology
    |August 21, 2013
    PubMed
    Summary

    Climate change significantly impacts winegrape berry composition. Warmer regions lead to lower anthocyanins and titratable acidity (TA), and higher pH, affecting wine quality.

    Area of Science:

    • Viticulture and Oenology
    • Climate Science
    • Plant Physiology

    Background:

    • Climate is a key factor influencing grape berry composition and wine quality.
    • Projected climate change may alter grape composition, but impacts on specific attributes like anthocyanins, pH, and titratable acidity (TA) are not fully understood.
    • Understanding these impacts is crucial for viticulture adaptation strategies.

    Purpose of the Study:

    • To empirically describe the influence of climate on anthocyanins, pH, and TA in Vitis vinifera cultivars along a climate gradient.
    • To develop climate-variable-based models to predict changes in berry composition.
    • To assess the impact of climate change on winegrape quality attributes.

    Main Methods:

    • Utilized a 700 km climate gradient across Western Australian wine regions.

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  • Analyzed berry composition (anthocyanins, pH, TA) at a consistent maturity (22° Brix) for Cabernet Sauvignon, Chardonnay, and Shiraz.
  • Developed empirical models correlating berry attributes with climate variables.

    • Main Results:

    • Berries from warmer regions showed lower anthocyanins and TA, and higher pH compared to cooler regions.
    • Climate variables explained a significant portion of the variation: 82-87% for TA, 83% for anthocyanins, and ~50% for pH.
    • Key climate variables included diurnal ranges, ripening period temperature, vapor pressure deficit, and growing degree days.

    Conclusions:

    • A warming climate is predicted to decrease berry anthocyanins and TA, while increasing pH.
    • Climate-variable-based models effectively described variations in TA and anthocyanins, highlighting climate's dominant role.
    • These models can aid in assessing future changes in berry composition and wine quality under changing climate conditions.