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Acceleration of global vegetation greenup from combined effects of climate change and human land management.

https://arctichealth.org/en/permalink/ahliterature297897
Source
Glob Chang Biol. 2018 11; 24(11):5484-5499
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Date
11-2018
Author
Lanhui Wang
Feng Tian
Yuhang Wang
Zhendong Wu
Guy Schurgers
Rasmus Fensholt
Author Affiliation
Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark.
Source
Glob Chang Biol. 2018 11; 24(11):5484-5499
Date
11-2018
Language
English
Publication Type
Journal Article
Research Support, Non-U.S. Gov't
Keywords
Agriculture
Climate change
Forestry
Humans
Plant Development
Remote Sensing Technology
Urbanization
Abstract
Global warming and human land management have greatly influenced vegetation growth through both changes in spring phenology and photosynthetic primary production. This will presumably impact the velocity of vegetation greenup (Vgreenup, the daily rate of changes in vegetation productivity during greenup period), yet little is currently known about the spatio-temporal patterns of Vgreenup of global vegetation. Here, we define Vgreenup as the ratio of the amplitude of greenup (Agreenup) to the duration of greenup (Dgreenup) and derive global Vgreenup from 34-year satellite leaf area index (LAI) observations to study spatio-temporal dynamics of Vgreenup at the global, hemispheric, and ecosystem scales. We find that 19.9% of the pixels analyzed (n = 1,175,453) experienced significant trends toward higher greenup rates by an average of 0.018 m2  m-2  day-1 for 1982-2015 as compared to 8.6% of pixels with significant negative trends (p 
PubMed ID
29963745 View in PubMed
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Acceleration of global vegetation greenup from combined effects of climate change and human land management.

https://arctichealth.org/en/permalink/ahliterature292666
Source
Glob Chang Biol. 2018 Jul 02; :
Publication Type
Journal Article
Date
Jul-02-2018
Author
Lanhui Wang
Feng Tian
Yuhang Wang
Zhendong Wu
Guy Schurgers
Rasmus Fensholt
Author Affiliation
Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350, Copenhagen, Denmark.
Source
Glob Chang Biol. 2018 Jul 02; :
Date
Jul-02-2018
Language
English
Publication Type
Journal Article
Abstract
Global warming and human land management have greatly influenced vegetation growth through both changes in spring phenology and photosynthetic primary production. This will presumably impact the velocity of vegetation greenup (Vgreenup, the daily rate of changes in vegetation productivity during greenup period), yet little is currently known about the spatio-temporal patterns of Vgreenup of global vegetation. Here, we define Vgreenup as the ratio of the amplitude of greenup (Agreenup) to the duration of greenup (Dgreenup) and derive global Vgreenup from 34-year satellite leaf area index (LAI) observations to study spatio-temporal dynamics of Vgreenup at the global, hemispheric and ecosystem scales. We find that 19.9% of the pixels analyzed (n = 1175453) experienced significant trends toward higher greenup rates by an average of 0.018 m2 m-2 day-1 for 1982-2015 as compared to 8.6% of pixels with significant negative trends (P
PubMed ID
29963745 View in PubMed
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Arctic sea ice, Eurasia snow, and extreme winter haze in China.

https://arctichealth.org/en/permalink/ahliterature281082
Source
Sci Adv. 2017 Mar;3(3):e1602751
Publication Type
Article
Date
Mar-2017
Author
Yufei Zou
Yuhang Wang
Yuzhong Zhang
Ja-Ho Koo
Source
Sci Adv. 2017 Mar;3(3):e1602751
Date
Mar-2017
Language
English
Publication Type
Article
Abstract
The East China Plains (ECP) region experienced the worst haze pollution on record for January in 2013. We show that the unprecedented haze event is due to the extremely poor ventilation conditions, which had not been seen in the preceding three decades. Statistical analysis suggests that the extremely poor ventilation conditions are linked to Arctic sea ice loss in the preceding autumn and extensive boreal snowfall in the earlier winter. We identify the regional circulation mode that leads to extremely poor ventilation over the ECP region. Climate model simulations indicate that boreal cryospheric forcing enhances the regional circulation mode of poor ventilation in the ECP region and provides conducive conditions for extreme haze such as that of 2013. Consequently, extreme haze events in winter will likely occur at a higher frequency in China as a result of the changing boreal cryosphere, posing difficult challenges for winter haze mitigation but providing a strong incentive for greenhouse gas emission reduction.
PubMed ID
28345056 View in PubMed
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