Growing season relative humidity variations and possible impacts on Hulunbuir grassland  

呼伦贝尔地区生长季相对湿度变化及其对草原的可能影响(英文)

作　　者：孙铂 刘禹 雷莺 

机构地区：[1]School of Resources, Environment and Historical Culture,Xianyang Normal University [2]State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment, Chinese Academy of Sciences [3]Joint Center for Global Change Studies (JCGCS) [4]School of Human Settlements and Civil Engineering, Xi’an Jiaotong University

出　　处：《Science Bulletin》2016年第9期728-736,共9页科学通报（英文版）

基　　金：supported by the State Key Laboratory of Loess and Quaternary Geology(SKLLQG1316);the Scientific Research Plan Projects of Shaanxi Education Department(15JK1796);the Dominant Discipline Construction Projects of Shaanxi(Historical Geography 0602 SZXKY1302);the Specialized Research Fund Project of Xianyang Normal University(12XSYK0310)

摘　　要：A relative humidity series of April-August during 1825-2009 AD was reconstructed based on tree- ring width of Pinus sylvestris var. mongolica for the Hulunbuir area. During the past 185 years, 25 humid years and 26 arid years were identified in the reconstruction, as well as 6 wet periods and 6 dry periods. The relative humidity has decreased since approximately the 1950s, suggesting a warm and dry climate trend in the study area. The reconstruction can be compared with those of the surrounding tree ring reconstructed precipitation and rela- tive humidity series at the decadal scale, reflecting the consistency of the regional climate variations. Besides, significant positive correlations are revealed between the reconstruction and the normalized difference vegetation index of the Hulunbuir grassland. And the decrease in relative humidity will cause negative impacts on the Hulunbuir grassland. Comparisons between the sandstorm records and the relative humidity of the study area indicate that strong sandstorms occurred more frequently in Hulunbuir when the relative humidity was low. Therefore, under the downward trend in relative humidity, more effort should be made to protect the grassland ecology and treat the bare sand land for the local and surrounding areas.4 月 8 月的一个相对湿度系列基于 Pinus sylvestris var 的树戒指宽度在 1825-2009 广告期间被重建。为 Hulunbuir 区域的 mongolica。在过去期间 185 ? 年， 25 潮湿的年和 26 干旱的年在重建被识别，以及 6 弄湿时期和 6 个干燥时期。相对湿度近似后来减少了 1950 年代，在学习区域建议一个温暖、干燥的气候趋势。重建能与包围的树戒指的那些相比在十的规模的重建的降水和相对湿度系列，反映地区性的气候变化的一致性。而且，重要积极关联在重建和 Hulunbuir 草地的规范的差别植被索引之间被揭示。并且在相对湿度的减少将在 Hulunbuir 草地上引起否定影响。当相对湿度是低的时，在沙暴记录和学习区域的相对湿度之间的比较显示强壮的沙暴更经常发生在 Hulunbuir。因此，在下面向下在相对湿度的趋势，更多的努力应该被作保护草地生态学并且为本地、包围的区域对待赤裸的沙陆地。

关 键 词：Tree ring Relative humidity RECONSTRUCTION Hulunbuir Grassland degradation 

分 类 号：S812[农业科学—草业科学] P457[农业科学—畜牧学]