Impact of climate change on storage conditions for major agricultural commodities across the contiguous United States

Impact of climate change on storage conditions for major agricultural commodities across the contiguous United States
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气候变化对美国本土主要农产品储存条件的影响

DOI:
10.1007/s10584-020-02873-5
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发表时间:
2020
期刊:
影响因子:
4.8
通讯作者:
Sanz-Saez, Alvaro
Sanz-Saez, Alvaro
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Lesinger, Kyle;Tian, Di;Leisner, Courtney P.;Sanz-Saez, Alvaro

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气候变化导致的收获后储存条件的变化可直接影响能源使用、粮食供应和质量。然而,没有研究评估气候变化对美国(CONUS),世界各地的主要农业生产国不同气候区域的采后储存条件的影响。本研究的目的是评估气候变化对CONUS内9个气候区域中最高产量作物冷藏条件的影响。当环境温度相对于作物储藏基础温度升高时,储藏度日(SDD)会累积。利用历史气候数据和20个缩小尺度的全球气候模式预测,计算了每种区域作物的SDD和冬季子期长度的变化。与历史参考期(1979-2005年)相比,所有区域都预测SDD累积量显著增加,冬季子期长度缩短。2020 - 2080年,西北和东北地区苹果受SDD累积的影响最大,每年增加261 - 1004个SDD。在2020年至2080年之间,中西部地区的马铃薯预计将失去冬季最长的天数(24-39天),东南部地区的花生将经历冬季长度最长的减少(17-23%)。SDD积累的增加和冬季长度的缩短将对未来的粮食供应和储存成本产生直接影响。这项研究是第一次全面分析气候变化对农业商品储存条件的影响,在全国范围内的异质气候条件,为长期农业储存规划提供有用的信息。
Changes in postharvest storage conditions due to climate change can directly affect energy usage and food supply and quality. However, no study has assessed climate change impacts on postharvest storage conditions in different climate regions over the contiguous United States (CONUS), a major agricultural producer around the world. The goal of this study is to assess the impact of climate change on cold storage conditions for the highest grossing crop for each of the nine climate regions within the CONUS. Storage degree days (SDDs) accumulate when ambient temperatures increase relative to crop storage base temperatures. Changes in SDDs and winter subperiod length were calculated for each regional crop using historical climate data and 20 downscaled global climate model projections. All regions project significant increases in SDD accumulation and decreases in winter subperiod length when compared with the historical reference period (1979–2005). Between years 2020 and 2080, Northwest and Northeast regions’ apples will be impacted most by SDD accumulation with yearly increases between 261 and 1004 SDDs. Between years 2020 and 2080, Midwest regions’ potatoes are projected to lose the most days of winter (24–39 days), and Southeast regions’ peanuts will experience the greatest decrease in winter length (17–23%). Increases in SDD accumulation and decreases in winter length will have direct implications on future food supply and storage costs. This study is the first comprehensive analysis of climate change impacts on the storage conditions for agricultural commodities over heterogenous climate conditions at national scale, providing useful information for long-term agricultural storage planning.
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