新疆自然植被对非对称性昼夜增温的时滞响应

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Abstract

In order to explore the complex relationship between vegetation productivity and diurnal warming in Xinjiang, this study quantitatively analyzed the variation trend of diurnal warming and the temporal lagging in responses of vegetation, via Normalized Difference Vegetation Index, to asymmetric diurnal warming in the northern of Xinjiang, southern of Xinjiang and Yili valley. The results indicated that:The trend of the diurnal warming in all the three regions were asymmetric with a significant spatial heterogeneity. The nighttime warming was approximately 1.67 times that of daytime in northern Xinjiang during growing seasons, 1.59 times in southern Xinjiang, and 2.67 times in Yili valley. The diurnal temperature difference reduced significantly in Yili region. There was a significant difference in the response of vegetation to the asymmetric diurnal accumulated temperature. The average temporal lags of vegetation response to cumulative T_max and T_min in Xinjiang were approximately (0.97±0.93) months and (0.91±0.95) months. Overall, the daytime warming had significantly positive effects on the coniferous forests, broad-leaved forests and meadow grassland vegetation in all three regions; and the nighttime warming had significantly positive effects on the desert grassland and typical grassland.

Key words： asymmetric warming diurnal warming vegetation types time lags response Xinjiang

Received: 06 May 2019

PACS:

X171

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	Articles by authors
	ZHANG Jun-yong
	DING Jian-li
	HUANG Shuai
	WU Peng-fei
	TAN Jiao

Cite this article:

ZHANG Jun-yong,DING Jian-li,HUANG Shuai等. Time lags responses of terrestrial natural vegetation to asymmetric diurnal warming in Xinjiang[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 392-400.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/392

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