基于Mann-Kendall法与草地分类的气候变化特征

发布时间：2018-03-28 19:23

本文选题：草地分类　切入点：气候特征　出处：《科学技术与工程》2017年24期

【摘要】：气候变化对草地类型的分布有着决定性的影响,量化分析其影响程度有着重要的意义。将内蒙古全区草地划分为优质草地、中质草地、劣质草地和高产草地、中产草地、低产草地;基于内蒙古全区23个中国地面国际交换站气象资料(1957~2014年),采用Mann-Kendall法对上述两套分类方案的各类草地的年降水量和平均气温进行趋势分析和突变性检验。结果表明:优质、中质、高产、中产草地年降水量呈减少趋势,劣质和低产草地年降水量呈增加趋势;各类草地平均气温均呈增加趋势。劣质和低产草地年降水量的离散程度以及优质和高产草地平均气温的离散程度较其他草地更大,各类草地的年降水量和平均气温在研究时期内均发生突变,不同类型草地的降水量和气温有不同程度的差别。
[Abstract]:Climate change has a decisive effect on the distribution of grassland types, and it is of great significance to quantitatively analyze the degree of influence. The grassland in Inner Mongolia is divided into high quality grassland, middle quality grassland, inferior grassland, high yield grassland and middle yield grassland. Low yield grassland; Based on the meteorological data of 23 China ground international exchange stations in Inner Mongolia from 1957 to 2014, the trend analysis and abrupt change test of the annual precipitation and mean temperature of all kinds of grassland in the above two sets of classification schemes were carried out by using Mann-Kendall method. The results showed that the quality of grassland was high quality and medium quality. The annual precipitation of high yield and middle yield grassland showed a decreasing trend, while the annual precipitation of inferior and low yield grassland showed an increasing trend. The average temperature of all kinds of grassland showed an increasing trend. The dispersion degree of annual precipitation and the average temperature of good quality and high yield grassland were larger than those of other grasslands. The annual precipitation and mean temperature of all kinds of grasslands were abrupt in the period of study, and the precipitation and temperature of different types of grassland were different in different degrees.
【作者单位】：中国水利水电科学研究院牧区水利科学研究所;
【基金】：中国水利水电科学研究院科研专项(MK2016J08) 水利部公益型项目(201401003)资助
【分类号】：P467;S812

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