干旱区生态环境知识资源中心(Arid): 1980-2013年中国陆地生态系统总初级生产力对干旱的响应特征

Arid

	1980-2013年中国陆地生态系统总初级生产力对干旱的响应特征
其他题名	The responses of gross primary production to drought in terrestrial ecosystems of China during 1980-2013
	杜文丽; 孙少波; 吴云涛; 宋照亮
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2020
卷号	39 期号:1 页码:23-35
中文摘要	干旱事件通过影响陆地生态系统的组成、结构和功能显著改变整个陆地生态系统碳循环。陆地生态系统总初级生产力(GPP)是全球陆地碳通量中最大的组成部分 ,反映了陆地生态系统的生产力水平。本研究利用基于过程模型模拟的GPP数据(DLM GPP) 、基于通量观测升尺度的GPP数据(FLUXCOM GPP)和标准化降水蒸散指数(SPEI),量化分析了1980-2013年中国陆地生态系统GPP和干旱的时空格局,讨论了不同时间尺度上GPP对干旱的响应特征。结果表明: 1980-2013年,两种不同GPP数据在中国地区呈现的时间变化趋势的空间分布格局较为一致,上升趋势主要分布在西南地区,下降趋势主要分布在东北大部分地区;中国干旱面积的长期时间变化趋势略有下降,其中干旱化趋势主要位于秦岭淮河以南地区,而西北内陆地区则呈现明显的湿润化趋势;时间尺度上,GP P与SPEI年际变化格局基本吻合,1986、1997、2001和2011年等干旱年份的GPP显著降低;空间尺度上,北方大部分地区的GPP与SPE I呈正相关,南方大部分地区呈负相关,干旱对GPP的影响在半干旱地区表现更加明显; GPP对干旱的响应格局与选取干旱指数的时间尺度密切相关,而且不同方式估算的GPP对干旱响应和敏感度存在差异。因此,未来需进一步改进GPP模型和方法,增加观测站点,提高GPP估算的精确性。
英文摘要	Drought can substantially alter composition,structure and function of terrestrial ecosystems,and thus significantly affects terrestrial carbon cycle. Gross primary production (GPP),reflecting the productivity level of terrestrial ecosystems,is the largest component of the global terrestrial carbon fluxes. Here,we investigated the spatio-temporal patterns of GPP and drought in China during 1980-2013 and quantitatively analyzed the responses of GPP to drought at different temporal scales. Process-based model (DLM GPP) and eddy-covariance flux tower measurements(FLUXCOM GPP) were used to simulate GPP,while a drought index (standardized precipitation evapotranspiration index,SPEI) was employed to reflect the intensity of drought. The results showed that the two GPP estimates had similar spatio-temporal patterns,characterized by increasing trends in southwest China but decreasing trends in most of areas in northeast China. Overall,there was a slight decrease in drought-impacted areas in China,with most significant decrease in northwest inland. However,the south of Qinling Mountains-Huaihe River was becoming drier. The temporal variation of the two GPP estimates were generally consistent with SPEI,and displayed significant decreases in 1986,1997,2001 and 2011 due to severe drought events in these years. At the spatial scale,GPP estimates were correlated positively with SPEI in most regions of northern China,but they were negatively correlated in many areas of southern China. The effects of drought on GPP were more obvious in the semi-arid regions. The responses of GPP to drought were closely related to temporal scales of drought index. There were differences in the drought response and sensitivity of GPP estimated by the two models. Therefore,to get a more accurate estimation of GPP,there is an urgent need to improve the current GPP models and establish more flux observation sites.
中文关键词	模型 ; 极端气候 ; 碳循环 ; 总初级生产力 ; 标准化降水蒸散指数
英文关键词	model extreme climate carbon cycle gross primary production (GPP) standardized precipitation evapotranspiration index (SPEI)
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6651660
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353798
作者单位	杜文丽, 天津大学表层地球系统科学研究院, 天津 300072, 中国.; 孙少波, 天津大学表层地球系统科学研究院, 天津 300072, 中国.; 吴云涛, 天津大学表层地球系统科学研究院, 天津 300072, 中国.; 宋照亮, 天津大学表层地球系统科学研究院, 天津 300072, 中国.
推荐引用方式 GB/T 7714	杜文丽,孙少波,吴云涛,等. 1980-2013年中国陆地生态系统总初级生产力对干旱的响应特征[J],2020,39(1):23-35.
APA	杜文丽,孙少波,吴云涛,&宋照亮.(2020).1980-2013年中国陆地生态系统总初级生产力对干旱的响应特征.生态学杂志,39(1),23-35.
MLA	杜文丽,et al."1980-2013年中国陆地生态系统总初级生产力对干旱的响应特征".生态学杂志 39.1(2020):23-35.