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在1982-2018年期间,ENSO和北大西洋振荡 (NAO) 对欧亚草原的联合影响

Chang Liu¹, Jing Li¹, Qinhuo Liu¹

¹State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.

The Science of the total environment

|June 9, 2023

概括

欧亚大草原的草原正在变绿,受气候模式的影响. 温暖的厄尔尼诺/南方振荡 (ENSO) 和积极的北大西洋振荡 (NAO) 推动了增长,而寒冷的ENSO或负NAO阻碍了增长.

科学领域:

大气科学大气科学
生态生态学生态生态学
遥感遥感遥感遥感

背景情况:

厄尔尼诺/南方振荡 (ENSO) 和北大西洋振荡 (NAO) 是影响全球天气模式的主要气候驱动因素.
欧亚草原 (EAS) 是一个重要的草原生态系统,受到这些大规模大气振荡的重大影响.
了解这些远程连接对于预测草原动态和健康至关重要.

研究的目的:

研究1982年至2018年欧亚草原草原生长的时空模式.
分析草原生长异常与ENSO和NAO气候模式之间的相关性.
检查与ENSO和NAO相关的气象因素对草原健康的影响.

主要方法:

使用了四个长期叶面积指数 (LAI) 和一个规范差异植被指数 (NDVI) 的遥感产品.
分析了整个欧亚大草原的草原生长的时空异常模式.
与ENSO和NAO阶段相关的植被指数,并分析了相关的气象数据.

主要成果:

在过去的36年里,欧亚草原草原表现出绿化趋势.
温暖的ENSO和积极的NAO事件,与温度和降水增加相关,促进草原生长.
寒冷的ENSO和负的NAO事件,导致降温和降水变化,导致草原恶化.

结论:

ENSO和NAO显著影响欧亚草原草原的生长和健康.
联合ENSO和NAO事件可以放大或减轻对草原的气候影响.
这项研究强调了欧亚草原对主要气候波动的敏感性.

关键词:

恩索公司 (ENSO) 成立.欧亚草原 (EAS) 是一个欧亚草原.叶面积指数叶面积指数植被变化植物变化

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