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1. Response of vegetation phenology to urbanization in the conterminous United States

Author:
Mao, Jiafu,   et al.   ; Li, Xuecao; Zhou, Yuyu; Asrar, Ghassem R.; Li, Xiaoma; Li, Wenyu;     Show all 6 Authors
Source:
Global change biology 2017 v.23 no.7 pp. 2818-2830
ISSN:
1354-1013
Subject:
Earth system science; carbon; climatic zones; growing season; human health; models; nutrients; phenology; rural areas; urban areas; urbanization; vegetation types; United States
Abstract:
... The influence of urbanization on vegetation phenology is gaining considerable attention due to its implications for human health, cycling of carbon and other nutrients in Earth system. In this study, we examined the relationship between change in vegetation phenology and urban size, an indicator of urbanization, for the conterminous United States. We studied more than 4500 urban clusters of varyin ...
DOI:
10.1111/gcb.13562

2. Informing climate models with rapid chamber measurements of forest carbon uptake

Author:
Mao, Jiafu,   et al.   ; Metcalfe, Daniel B.; Ricciuto, Daniel; Palmroth, Sari; Campbell, Catherine; Hurry, Vaughan; Keel, Sonja G.; Linder, Sune; Shi, Xiaoying; Näsholm, Torgny; Ohlsson, Klas E. A.; Blackburn, M.; Thornton, Peter E.; Oren, Ram;     Show all 14 Authors
Source:
Global change biology 2017 v.23 no.5 pp. 2130-2139
ISSN:
1354-1013
Subject:
biomass; boreal forests; carbon; carbon dioxide; climate change; climate models; cost effectiveness; ecosystems; fertilizer application; net ecosystem exchange; nitrogen; nitrogen fertilizers; photosynthesis; prediction
Abstract:
... Models predicting ecosystem carbon dioxide (CO₂) exchange under future climate change rely on relatively few real‐world tests of their assumptions and outputs. Here, we demonstrate a rapid and cost‐effective method to estimate CO₂ exchange from intact vegetation patches under varying atmospheric CO₂ concentrations. We find that net ecosystem CO₂ uptake (NEE) in a boreal forest rose linearly by 4.7 ...
DOI:
10.1111/gcb.13451

3. Seasonal responses of terrestrial ecosystem water‐use efficiency to climate change

Author:
Mao, Jiafu,   et al.   ; Huang, Mengtian; Piao, Shilong; Zeng, Zhenzhong; Peng, Shushi; Ciais, Philippe; Cheng, Lei; Poulter, Ben; Shi, Xiaoying; Yao, Yitong; Yang, Hui; Wang, Yingping;     Show all 12 Authors
Source:
Global change biology 2016 v.22 no.6 pp. 2165-2177
ISSN:
1354-1013
Subject:
carbon dioxide; carbon dioxide fixation; climate; climate change; evapotranspiration; latitude; models; nitrogen; regression analysis; satellites; seasonal variation; spring; temperature; terrestrial ecosystems; transpiration; water use efficiency
Abstract:
... Ecosystem water‐use efficiency (EWUE) is an indicator of carbon–water interactions and is defined as the ratio of carbon assimilation (GPP) to evapotranspiration (ET). Previous research suggests an increasing long‐term trend in annual EWUE over many regions and is largely attributed to the physiological effects of rising CO₂. The seasonal trends in EWUE, however, have not yet been analyzed. In thi ...
DOI:
10.1111/gcb.13180

4. Change in terrestrial ecosystem water‐use efficiency over the last three decades

Author:
Mao, Jiafu,   et al.   ; Huang, Mengtian; Piao, Shilong; Sun, Yan; Ciais, Philippe; Cheng, Lei; Poulter, Ben; Shi, Xiaoying; Zeng, Zhenzhong; Wang, Yingping;     Show all 10 Authors
Source:
Global change biology 2015 v.21 no.6 pp. 2366-2378
ISSN:
1354-1013
Subject:
carbon cycle; carbon dioxide; climate; climate change; evapotranspiration; evolution; latitude; models; nitrogen; photosynthesis; plant communities; primary productivity; stomatal conductance; terrestrial ecosystems; vegetation; water use efficiency; Amazonia; Central America; North America; Siberia
Abstract:
... Defined as the ratio between gross primary productivity (GPP) and evapotranspiration (ET), ecosystem‐scale water‐use efficiency (EWUE) is an indicator of the adjustment of vegetation photosynthesis to water loss. The processes controlling EWUE are complex and reflect both a slow evolution of plants and plant communities as well as fast adjustments of ecosystem functioning to changes of limiting re ...
DOI:
10.1111/gcb.12873

5. Evaluation of the Community Land Model simulated carbon and water fluxes against observations over ChinaFLUX sites

Author:
Mao, Jiafu,   et al.   ; Zhang, Li; Shi, Xiaoying; Ricciuto, Daniel; He, Honglin; Thornton, Peter; Yu, Guirui; Li, Pan; Liu, Min; Ren, Xiaoli; Han, Shijie; Li, Yingnian; Yan, Junhua; Hao, Yanbin; Wang, Huimin;     Show all 15 Authors
Source:
Agricultural and forest meteorology 2016 v.226-227 pp. 174-185
ISSN:
0168-1923
Subject:
eddy covariance; primary productivity; soil organic carbon; leaf area index; carbon sinks; carbon sequestration; burning; soil respiration; summer; grasslands; water vapor; forests; terrestrial ecosystems; dry season; energy; autumn; soil water content; models; soil water; nitrogen; net ecosystem exchange; spring; heat transfer
Abstract:
... The Community Land Model (CLM) is an advanced process-based land surface model that simulates carbon, nitrogen, water vapor and energy exchanges between terrestrial ecosystems and the atmosphere at various spatial and temporal scales. We use observed carbon and water fluxes from five representative Chinese Terrestrial Ecosystem Flux Research Network (ChinaFLUX) eddy covariance tower sites to syste ...
DOI:
10.1016/j.agrformet.2016.05.018

6. Global patterns and climate drivers of water‐use efficiency in terrestrial ecosystems deduced from satellite‐based datasets and carbon cycle models

Author:
Mao, Jiafu,   et al.   ; Sun, Yan; Piao, Shilong; Huang, Mengtian; Ciais, Philippe; Zeng, Zhenzhong; Cheng, Lei; Li, Xiran; Zhang, Xinping; Peng, Shushi; Poulter, Benjamin; Shi, Xiaoying; Wang, Xuhui; Wang, Ying‐Ping; Zeng, Hui;     Show all 15 Authors
Source:
Global ecology and biogeography 2016 v.25 no.3 pp. 311-323
ISSN:
1466-822X
Subject:
biosphere; carbon cycle; climatic factors; data collection; evaporation; evapotranspiration; latitude; models; primary productivity; regression analysis; satellites; soil; solar radiation; temperature; temporal variation; terrestrial ecosystems; tropics; uncertainty; water use efficiency; water vapor
Abstract:
... AIM: To investigate how ecosystem water‐use efficiency (WUE) varies spatially under different climate conditions, and how spatial variations in WUE differ from those of transpiration‐based water‐use efficiency (WUEₜ) and transpiration‐based inherent water‐use efficiency (IWUEₜ). LOCATION: Global terrestrial ecosystems. METHODS: We investigated spatial patterns of WUE using two datasets of gross pr ...
DOI:
10.1111/geb.12411

7. Seasonally different response of photosynthetic activity to daytime and night‐time warming in the Northern Hemisphere

Author:
Mao, Jiafu,   et al.   ; Tan, Jianguang; Piao, Shilong; Chen, Anping; Zeng, Zhenzhong; Ciais, Philippe; Janssens, Ivan A.; Myneni, Ranga B; Peng, Shushi; Peñuelas, Josep; Shi, Xiaoying; Vicca, Sara;     Show all 12 Authors
Source:
Global change biology 2015 v.21 no.1 pp. 377-387
ISSN:
1354-1013
Subject:
autumn; correlation; covariance; diurnal activity; ecophysiology; ecosystems; global warming; models; night temperature; normalized difference vegetation index; photosynthesis; seasonal variation; spring; summer; temperate zones; vegetation; Central America; Central Asia; North America
Abstract:
... Over the last century the Northern Hemisphere has experienced rapid climate warming, but this warming has not been evenly distributed seasonally, as well as diurnally. The implications of such seasonal and diurnal heterogeneous warming on regional and global vegetation photosynthetic activity, however, are still poorly understood. Here, we investigated for different seasons how photosynthetic acti ...
DOI:
10.1111/gcb.12724

8. Detection and attribution of vegetation greening trend in China over the last 30 years

Author:
Mao, Jiafu,   et al.   ; Piao, Shilong; Yin, Guodong; Tan, Jianguang; Cheng, Lei; Huang, Mengtian; Li, Yue; Liu, Ronggao; Myneni, Ranga B.; Peng, Shushi; Poulter, Ben; Shi, Xiaoying; Xiao, Zhiqiang; Zeng, Ning; Zeng, ZhenZhong; Wang, Yingping;     Show all 16 Authors
Source:
Global change biology 2015 v.21 no.4 pp. 1601-1609
ISSN:
1354-1013
Subject:
afforestation; climate change; data collection; ecosystem management; ecosystems; forests; growing season; leaf area index; models; nitrogen; plateaus; China
Abstract:
... The reliable detection and attribution of changes in vegetation growth is a prerequisite for the development of strategies for the sustainable management of ecosystems. This is an extraordinary challenge. To our knowledge, this study is the first to comprehensively detect and attribute a greening trend in China over the last three decades. We use three different satellite‐derived Leaf Area Index ( ...
DOI:
10.1111/gcb.12795