...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hydrology >Long-term patterns of air temperatures, daily temperature range, precipitation, grass-reference evapotranspiration and aridity index in the USA Great Plains: Part I. Spatial trends
【24h】

Long-term patterns of air temperatures, daily temperature range, precipitation, grass-reference evapotranspiration and aridity index in the USA Great Plains: Part I. Spatial trends

机译：美国大平原的长期气温，日温度范围，降水，以草为参考的蒸散量和干旱指数的长期模式：第一部分。空间趋势

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Due to their substantial spatio-temporal behavior, long-term quantification and analyses of important hydrological variables are essential for practical applications in water resources planning, evaluating the water use of agricultural crop production and quantifying crop evapotranspiration patterns and irrigation management vs. hydrologic balance relationships. Observed data at over 800 sites across the Great Plains of USA, comprising of 9 states and 2,307,410 km(2) of surface area, which is about 30% of the terrestrial area of the USA, were used to quantify and map large-scale and long-term (1968-2013) spatial trends of air temperatures, daily temperature range (DTR), precipitation, grass-reference evapotranspiration (ETo) and aridity index (AI) at monthly, growing season and annual time steps. Air temperatures had a strong north to south increasing trend, with annual average varying from - 1 to 24 degrees C, and growing season average temperature varying from 8 to 30 degrees C. DTR gradually decreased from western to eastern parts of the region, with a regional annual and growing season averages of 14.25 degrees C and 14.79 degrees C, respectively. Precipitation had a gradual shift towards higher magnitudes from west to east, with the average annual and growing season (May-September) precipitation ranging from 163 to 1486 mm and from 98 to 746 mm, respectively. ETo had a southwest-northeast decreasing trend, with regional annual and growing season averages of 1297 mm and 823 mm, respectively. AI increased from west to east, indicating higher humidity (less arid) towards the east, with regional annual and growing season averages of 0.49 and 0.44, respectively. The spatial datasets and maps for these important climate variables can serve as valuable background for climate change and hydrologic studies in the Great Plains region. Through identification of priority areas from the developed maps, efforts of the concerned personnel and agencies and resources can be diverted towards development of holistic strategies to address water supply and demand challenges under changing climate. These strategies can consist of, but not limited to, advancing water, crop and soil management, and genetic improvements and their relationships with the climatic variables on large scales. (C) 2016 Elsevier B.V. All rights reserved.
机译：由于其大量的时空行为，对重要的水文变量进行长期量化和分析对于水资源规划中的实际应用，评估农业作物生产的用水量以及量化作物的蒸散量，灌溉管理与水文平衡关系至关重要。 。美国大平原上超过800个站点的观测数据被用来量化和绘制大范围的地形图，其中包括9个州和2,307,410 km（2）的表面积，约占美国陆地面积的30％。在每月，生长季节和年度时间步长上的长期（1968-2013年）空气温度，日温度范围（DTR），降水，草参考蒸散量（ETo）和干旱指数（AI）的空间趋势。气温从北向南呈强烈上升趋势，年平均温度在-1至24摄氏度之间，生长季节的平均温度在8至30摄氏度之间。DTR从该地区的西部到东部逐渐下降，区域年平均和生长季节平均值分别为14.25摄氏度和14.79摄氏度。降水量从西向东逐渐向更高的方向移动，年均和生长季节（5月至9月）的降水量分别为163至1486 mm和98至746 mm。 ETo具有西南向东北的下降趋势，区域年平均和生长季节的平均值分别为1297 mm和823 mm。 AI从西向东增加，表明向东的湿度较高（干旱较少），区域年平均和生长季平均值分别为0.49和0.44。这些重要气候变量的空间数据集和地图可作为大平原地区气候变化和水文学研究的宝贵背景。通过从已绘制的地图中确定优先领域，可以将有关人员，机构和资源的工作转向制定整体战略，以应对气候变化下的水供需挑战。这些策略可以包括但不限于推进水，作物和土壤管理以及遗传改良及其与气候变量的关系。 （C）2016 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号