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Effect of Temperature on Frost-Free Days and Length of Crop Growing Season across Southern Ontario
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作者 Ramesh Pall Rudra Rituraj Shukla +2 位作者 Trevor Dickinson Pradeep Kumar Goel Jaskaran Dhiman 《American Journal of Climate Change》 2023年第4期700-718,共19页
Climate change has an impact on various climatic variables. In this study our focus is mainly on temperature characteristics of climate parameter. In temperate and humid regions like southern Ontario, the effect of cl... Climate change has an impact on various climatic variables. In this study our focus is mainly on temperature characteristics of climate parameter. In temperate and humid regions like southern Ontario, the effect of climate change on Frost-free days in winter is distinctive. The average annual temperature is going upward but the extreme increase is in the winter temperature. Winter average temperature is going up by about 2˚C. However, extreme daily minimum temperature is going up by more than 3˚C. This climate effect has a great impact on the nature of precipitation and length of frost-free days. The snowfall over winter months is decreasing and the rainfall is increasing. However, the number of frost-free days during late fall months, early winter months, late winter months and early spring months are increasing. This result reveals an increase in length of the growing season. This research focuses on the effect of change in climatic variables on Frost-free days in Southern Ontario. Therefore, special attention should be given to the effect of change in climate Frost-free conditions on length of crop growing in winter season for potential investigation. 展开更多
关键词 Climate Change Minimum Temperature Frost-Free days snowfall Crop Growing Season Southern Ontario
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张家口地区雪资源时空特征分析 被引量:4
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作者 赵海江 王秀荣 王立声 《干旱区资源与环境》 CSSCI CSCD 北大核心 2021年第5期63-70,共8页
基于1961-2019年张家口市14个气象站点观测数据,利用Kriging空间插值、趋势系数、气候倾向率、累积距平和Mann-Kendall法全面分析了该地区降(积)雪资源时空变化特征,结果表明:1)各雪资源要素多年均值空间分布总体呈自北向南递减趋势,雪... 基于1961-2019年张家口市14个气象站点观测数据,利用Kriging空间插值、趋势系数、气候倾向率、累积距平和Mann-Kendall法全面分析了该地区降(积)雪资源时空变化特征,结果表明:1)各雪资源要素多年均值空间分布总体呈自北向南递减趋势,雪资源丰富区位于崇礼以北县区。多数要素表现出全市一致的空间变化特征。2)近59a来,降(积)雪主要发生于当年11月至次年3月。全市平均初(终)雪日显著推迟(提前),雪期、降雪日数显著减少,线性倾向率分别为-3.20d/10a、-4.18d/10a、-7.38d/10a、-4.18d/10a。而降雪量、积雪日数(深度)呈在波动中缓慢上升趋势。3)平均雪期、降雪日数和初(终)雪日呈现"∩"型年代际变化趋势,而平均降雪量、积雪日数(深度)总体走势相反。初(终)雪日、积雪日数分别在2003、1997、1979年前后发生突变,其余要素未有突变现象。 展开更多
关键词 初(终)雪日 雪期 降雪 积雪 张家口地区
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