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Title: Spatiotemporal patterns of evapotranspiration along the North American east coast as influenced by multiple environmental changes

Abstract

The North American east coast has experienced significant land-use and climate changes since the beginning of the 20th century. In this study, using the Dynamic Land Ecosystem Model 2.0 driven by time-series input data of land use, climate and atmospheric CO 2, we examined how these driving forces have affected the spatiotemporal trends and variability of evapotranspiration (ET) in this region during 1901–2008. Annual ET in the North American east coast during this period was 648.3 ± 38.6 mm/year and demonstrated an increasing trend. Factorial model simulations indicated that climate variability explained 76% of the inter-annual ET variability. Although land-use change only explained 16% of the ET temporal variability, afforestation induced the upward trend of ET and increased annual ET by 12.8 mm/year. Elevated atmospheric CO 2 reduced annual ET by 0.84 mm, and its potential impacts under future atmospheric CO 2 levels could be much larger than estimates for the historical 1901–2008 period. Climate change determined the spatial pattern of ET changes across the entire study area, whereas land-use changes dramatically affected ET in watersheds with significant land conversions. In spite of the multiple benefits from afforestation, its impacts on water resources should be considered in future land-use policymore » making. As a result, elevated ET may also affect fresh water availability for the increasing social and economic water demands.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Auburn Univ., Auburn, AL (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1339412
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Ecohydrology
Additional Journal Information:
Journal Volume: 8; Journal Issue: 4; Journal ID: ISSN 1936-0584
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; North America east coast; land-use change; climate change; atmospheric CO2 elevation; evapotranspiration (ET); Dynamic Land Ecosystem Model (DLEM)

Citation Formats

Yang, Qichun, Tian, Hanqin, Li, Xia, Tao, Bo, Ren, Wei, Chen, Guangsheng, Lu, Chaoqun, Yang, Jia, Pan, Shufen, Banger, Kamaljit, and Zhang, Bowen. Spatiotemporal patterns of evapotranspiration along the North American east coast as influenced by multiple environmental changes. United States: N. p., 2014. Web. doi:10.1002/eco.1538.
Yang, Qichun, Tian, Hanqin, Li, Xia, Tao, Bo, Ren, Wei, Chen, Guangsheng, Lu, Chaoqun, Yang, Jia, Pan, Shufen, Banger, Kamaljit, & Zhang, Bowen. Spatiotemporal patterns of evapotranspiration along the North American east coast as influenced by multiple environmental changes. United States. doi:10.1002/eco.1538.
Yang, Qichun, Tian, Hanqin, Li, Xia, Tao, Bo, Ren, Wei, Chen, Guangsheng, Lu, Chaoqun, Yang, Jia, Pan, Shufen, Banger, Kamaljit, and Zhang, Bowen. Fri . "Spatiotemporal patterns of evapotranspiration along the North American east coast as influenced by multiple environmental changes". United States. doi:10.1002/eco.1538. https://www.osti.gov/servlets/purl/1339412.
@article{osti_1339412,
title = {Spatiotemporal patterns of evapotranspiration along the North American east coast as influenced by multiple environmental changes},
author = {Yang, Qichun and Tian, Hanqin and Li, Xia and Tao, Bo and Ren, Wei and Chen, Guangsheng and Lu, Chaoqun and Yang, Jia and Pan, Shufen and Banger, Kamaljit and Zhang, Bowen},
abstractNote = {The North American east coast has experienced significant land-use and climate changes since the beginning of the 20th century. In this study, using the Dynamic Land Ecosystem Model 2.0 driven by time-series input data of land use, climate and atmospheric CO2, we examined how these driving forces have affected the spatiotemporal trends and variability of evapotranspiration (ET) in this region during 1901–2008. Annual ET in the North American east coast during this period was 648.3 ± 38.6 mm/year and demonstrated an increasing trend. Factorial model simulations indicated that climate variability explained 76% of the inter-annual ET variability. Although land-use change only explained 16% of the ET temporal variability, afforestation induced the upward trend of ET and increased annual ET by 12.8 mm/year. Elevated atmospheric CO2 reduced annual ET by 0.84 mm, and its potential impacts under future atmospheric CO2 levels could be much larger than estimates for the historical 1901–2008 period. Climate change determined the spatial pattern of ET changes across the entire study area, whereas land-use changes dramatically affected ET in watersheds with significant land conversions. In spite of the multiple benefits from afforestation, its impacts on water resources should be considered in future land-use policy making. As a result, elevated ET may also affect fresh water availability for the increasing social and economic water demands.},
doi = {10.1002/eco.1538},
journal = {Ecohydrology},
number = 4,
volume = 8,
place = {United States},
year = {Fri Aug 08 00:00:00 EDT 2014},
month = {Fri Aug 08 00:00:00 EDT 2014}
}

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