Understanding the spring phenology of Arctic tundra using multiple satellite data products and ground observations
Understanding the spring phenology of Arctic tundra using multiple satellite data products and ground observations
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利用多个卫星数据产品和地面观测了解北极苔原的春季物候
DOI：
10.1007/s11430-019-9644-8
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发表时间：
2020-08
期刊：
影响因子：
--
通讯作者：
Wenjin Wu
中科院分区：
文献类型：
--
作者：
Jiangshan Zheng;Xiyan Xu;Gensuo Jia;Wenjin Wu
The Arctic is highly sensitive to climate change, and the rise in its near-surface air temperatures has been almost twice the global average. The increased growth of the Arctic tundra and its changing seasonality have been observed, largely in response to the impacts of climate change. In this study, we investigated the temporal and spatial variations of the start of the growing season (SOS) using various remote sensing indices, including Normalized Difference Vegetation Index, Normalized Difference Water Index, and Normalized Difference Snow Index from 2000 to 2018 in Arctic tundra regions. The SOS was derived at 29 sites from ground observations, including CO2flux data, phenological images, and field records that were used to validate the SOS from remote sensing indices. Our results revealed that the SOS was delayed by approximately 3.86 days per degree of latitude along the northward latitudinal gradient. From 2000 to 2018, the start of the growing season and the interannual variability differed greatly among tundra types. Although the overall trends were not significant from 2000 to 2018, the start of the growing season in different plant communities was consistently delayed after 2016. High Arctic vegetation, including (1) low wetland complexes (5–10 cm) dominated by sedges, grasses, and mosses, and (2) slightly higher prostrate and hemi-prostrate shrubs (< 15 cm), experienced a delayed start of the growing season. The start of the growing season of Low Arctic vegetation, comprising (1) wetland complexes (10–40 cm) dominated by sedges, grasses, mosses, and dwarf shrubs, (2) moist tundra (20–50 cm) dominated by tussock cottongrass and dwarf shrubs, and (3) transition zones containing tundra and taiga, displayed no obvious trend.
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影响因子：
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作者：
Shuying Zhong;Q. Ge;Jingyun Zheng;Junhu Dai;Huanjiong Wang
通讯作者：
Shuying Zhong;Q. Ge;Jingyun Zheng;Junhu Dai;Huanjiong Wang
1981-2010年气候变化下中国小麦物候变化的时空分异
DOI：
10.1007/s11430-017-9149-0
发表时间：
2018-06
期刊：
Science China Earth Sciences
影响因子：
--
作者：
Liu Yujie;Chen Qiaomin;Ge Quansheng;Dai Junhu
通讯作者：
Dai Junhu
影响因子：
5.6
作者：
Winkler DE;Butz RJ;Germino MJ;Reinhardt K;Kueppers LM
通讯作者：
Kueppers LM
影响因子：
5.8
作者：
Zeng Heqing;Jia Gensuo
通讯作者：
Jia Gensuo
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DOI：
10.1073/pnas.1012490107
发表时间：
2010-11
影响因子：
11.1
作者：
Haiying Yu;Eike Luedeling;Jianchu Xu
通讯作者：
Jianchu Xu