中文摘要：

24节气是我国古代劳动人民的独特创造。全面掌握“24节气”的气候变化规律，不但有利于指导农事生产，提高气象服务质量和水平，而且在为人类预防和治疗疾病方面也有重要意义。在全球变暖的气候背景下，统计分析了1961～2010年黄河中下游地区24节气的气温、湿度、风速等6个气象要素的变化特征，得到以下结论：黄河中下游地区随节气变换气候变化显著，大暑、小暑节气高温高湿，小寒、大寒节气寒冷干燥，清明节气寒温反复大风将至，霜降节气天气渐凉秋燥加剧等。50年内，春季型节气（平均、最高、最低）气温显著升高，冬季型节气最低气温升高显著。气压随节气变化特征与气温大致相反，夏、秋季节气有升压趋势。相对湿度与降水均呈减少趋势，以秋季型节气减小趋势最明显。春季风速最大，夏、秋季风速最小，所有节气风速均呈减小趋势，冬夏季节气日照时间呈缩短趋势。

英文摘要：

Ancient Chinese farmers created 24 solar terms to guide agricultural production, improve the quality and level of meteorological services, and prevent and treat human diseases. Under the background of global warming, the variation characteristics of six meteorological elements of the 24 solar terms such as temperature, humidity, and wind speed, etc. during 1961？2010 are analyzed in the middle and lower reaches of the Yellow River region. It is determined that climate change is significant in the study region. The Great Heat and Slight Heat include high temperatures and humidity; the Great Cold and Slight Cold include low temperatures and humidity; the Clear and bright includes various temperature with wind;and the Frost’s Descent includes gradually cooling with aggravated autumn dryness. During the 50 year study period, the mean, maximum, and minimum temperatures of the spring-type solar terms have increased significantly whereas only the minimum temperatures of the winter-type solar terms show the same increase. The pressure distribution shows significant increases in summer-and winter-type solar terms. In addition, relative humidity and precipitation show decreasing trends, with the autumn-type solar terms showing the most obvious decrease. The wind speed of all solar terms shows a decreasing trending, with the maxima in spring and minima in summer and autumn. Sunshine hours of summerand winter-type solar terms show decreasing trends.