气候变化领域集成服务门户(CCPortal): Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001-2014

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DOI	10.1088/1748-9326/ab6d39
	Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001-2014
	Chen X.; Yang Y.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Vegetation phenology in spring has received much attention for its importance to terrestrial ecosystem carbon exchange and climate-biosphere interactions studies. Through control on surface water and heat balance, snow cover largely impacts on spring vegetation phenology. However, under the background of global warming and rapid reduction of spring snow cover extent across the Northern Hemisphere (NH), the responses of spring vegetation phenology have not been well documented. Using two satellite-derived land cover dynamic datasets and 420 in situ vegetation phenology observations from five filed datasets, this study evaluated the accuracy of satellite-derived vegetation phenology datasets and explored the changes of start of the growing season (SOS) across the NH snow-covered landmass for the period 2001-2014. Compared with MEaSUREs VIPPHEN, the MODIS SOS maps displayed higher accuracy in capture the real SOS climatology by validating with in situ observations (R 2 = 0.67, bias = -3.99 d). Moreover, evidences from MODIS SOS maps pointed out that the SOS advanced by approximately 2.36 d in NH middle to high latitudes (43.5 N-70.0 N), but delayed by about 0.53 d in lower latitudes (33.0 N-43.5 N) from 2001 to 2014. The contrast SOS anomalies across the NH snow-covered landmass were further proved by changes in spring NDVI derived from GIMMS in the corresponding period. In addition, the observed changes in SOS were consistent with the spatiotemporal pattern of spring snow end date found in previous studies, indicating vegetation phenology changes should be taken into account in estimating the impacts of snow in climate-biosphere interactions studies. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	climate change; northern hemisphere; satellite observations; SOS; start of the growing season
语种	英语
scopus关键词	Biospherics; Climate change; Forestry; Global warming; Radiometers; Satellites; Surface waters; Systems engineering; Vegetation; Growing season; In-situ observations; Northern hemisphere; Northern Hemispheres; Satellite observations; Spatiotemporal patterns; Terrestrial ecosystems; Vegetation phenology; Snow; atmosphere-biosphere interaction; global warming; growing season; land cover; latitude; MODIS; NDVI; Northern Hemisphere; phenology; snow cover; spatiotemporal analysis; surface water; terrestrial ecosystem
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154199
作者单位	State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Chen X.,Yang Y.. Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001-2014[J],2020,15(3).
APA	Chen X.,&Yang Y..(2020).Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001-2014.Environmental Research Letters,15(3).
MLA	Chen X.,et al."Observed earlier start of the growing season from middle to high latitudes across the Northern Hemisphere snow-covered landmass for the period 2001-2014".Environmental Research Letters 15.3(2020).