[Objective] The aim was to study variation characteristics of thermal resources in east Hexi Corridor in recent 50 years. [Method] Using the daily average air temperature data from 5 meteorological stations in east He...[Objective] The aim was to study variation characteristics of thermal resources in east Hexi Corridor in recent 50 years. [Method] Using the daily average air temperature data from 5 meteorological stations in east Hexi Corridor from 1959 to 2010, the variation of accumulated temperature steadily above 10 and 0 ℃, lasting days, the beginning and ending day were summarized, and then the variation characteristics of thermal resources under the background of climate warming were analyzed. [Result] The air temperature increased continuously in east Hexi Corridor, and the climatic trend rate of the annual average air temperature was 0.34 ℃/10 a, more significant than any other region in China. And it was well correlated with the thermal resource indexes such as the accumulated temperature steadily above 10 and 0 ℃, and their lasting days, and the beginning and ending day. Climate warming had made the accumulated temperature steadily above 10 and 0 ℃ increased significantly in east Hexi Corridor widespread. The accumulated temperature steadily above 10 and 0 ℃ had increased significantly. The lasting days of accumulated temperature steadily above 10 and 0 ℃ increased significantly too. The delay of ending days was more significant than the advancing of beginning days. [Conclusion] These changes in thermal resources were conductive to increase food production and maintain the stability of food production in east Hexi Corridor.展开更多
为探究枝江市高温天气气候变化特征,根据枝江市1965~2022年逐日最高气温和同期西太平洋副热带高压特征指数资料,利用线性趋势分析、Mann-Kendall法、小波分析等方法,分析了枝江市高温日数、极端高温和热积温的气候变化特征,并讨论了盛...为探究枝江市高温天气气候变化特征,根据枝江市1965~2022年逐日最高气温和同期西太平洋副热带高压特征指数资料,利用线性趋势分析、Mann-Kendall法、小波分析等方法,分析了枝江市高温日数、极端高温和热积温的气候变化特征,并讨论了盛夏期高温日数与西太平洋副热带高压的关系。结果表明:近58 a枝江市夏季高温日数、极端高温和热积温均呈现出“V”字形的变化,从20世纪60年代开始持续下降,80年代中后期达到最低谷后呈现出持续上升趋势,在21世纪近20 a上升趋势非常明显。突变检验显示,高温日数在2004~2005年发生了气候突变。高温日数存在准4 a, 7~8 a, 12~14 a和18~20 a尺度的周期变化规律,在12~14 a时间尺度下高温日数的周期振荡最强。高温日数与西太平洋副高在盛夏期密切相关,与副高脊线在7月和8月存在显著的正相关。该研究成果可为枝江市高温天气预报预警提供参考依据。展开更多
基金Supported by China Meteorological Bureau Program "Study on Drought Disaster in Gansu Province in Future 40 Years under the Background of Climate Changes"
文摘[Objective] The aim was to study variation characteristics of thermal resources in east Hexi Corridor in recent 50 years. [Method] Using the daily average air temperature data from 5 meteorological stations in east Hexi Corridor from 1959 to 2010, the variation of accumulated temperature steadily above 10 and 0 ℃, lasting days, the beginning and ending day were summarized, and then the variation characteristics of thermal resources under the background of climate warming were analyzed. [Result] The air temperature increased continuously in east Hexi Corridor, and the climatic trend rate of the annual average air temperature was 0.34 ℃/10 a, more significant than any other region in China. And it was well correlated with the thermal resource indexes such as the accumulated temperature steadily above 10 and 0 ℃, and their lasting days, and the beginning and ending day. Climate warming had made the accumulated temperature steadily above 10 and 0 ℃ increased significantly in east Hexi Corridor widespread. The accumulated temperature steadily above 10 and 0 ℃ had increased significantly. The lasting days of accumulated temperature steadily above 10 and 0 ℃ increased significantly too. The delay of ending days was more significant than the advancing of beginning days. [Conclusion] These changes in thermal resources were conductive to increase food production and maintain the stability of food production in east Hexi Corridor.
文摘为探究枝江市高温天气气候变化特征,根据枝江市1965~2022年逐日最高气温和同期西太平洋副热带高压特征指数资料,利用线性趋势分析、Mann-Kendall法、小波分析等方法,分析了枝江市高温日数、极端高温和热积温的气候变化特征,并讨论了盛夏期高温日数与西太平洋副热带高压的关系。结果表明:近58 a枝江市夏季高温日数、极端高温和热积温均呈现出“V”字形的变化,从20世纪60年代开始持续下降,80年代中后期达到最低谷后呈现出持续上升趋势,在21世纪近20 a上升趋势非常明显。突变检验显示,高温日数在2004~2005年发生了气候突变。高温日数存在准4 a, 7~8 a, 12~14 a和18~20 a尺度的周期变化规律,在12~14 a时间尺度下高温日数的周期振荡最强。高温日数与西太平洋副高在盛夏期密切相关,与副高脊线在7月和8月存在显著的正相关。该研究成果可为枝江市高温天气预报预警提供参考依据。
