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Long-term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 19012008


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dc.contributorHanqin Tian, tianhan@auburn.eduen_US
dc.creatorLiu, Mingliang
dc.creatorTian, Hanqin
dc.creatorYang, Qichun
dc.creatorYang, Jia
dc.creatorSong, Xia
dc.creatorLohren, Steven E.
dc.creatorCai, Wei-Jun
dc.date.accessioned2020-04-01T17:36:23Z
dc.date.available2020-04-01T17:36:23Z
dc.date.created2013
dc.identifier10.1002/wrcr.20180en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/wrcr.20180en_US
dc.identifier.urihttp://hdl.handle.net/11200/49777
dc.description.abstractThe Gulf of Mexico (GOM) is facing large pressures from environmental changes since the beginning of the last century. However, the magnitude and long-term trend of total water discharge to the GOM and the underlying processes are not well understood. In this study, the dynamic land ecosystem model (DLEM) has been improved and applied to investigate spatial and temporal variations of evapotranspiration (ET) and runoff (R) over drainage basins of the GOM during 1901–2008. Modeled ET and discharge were evaluated against upscaled data sets and gauge observations. Simulated results demonstrated a significant decrease in ET at a rate of 15 mm yr1 century1 and an insignificant trend in runoff/precipitation (R/P) and river discharge over the whole region during 1901–2008. However, the trends in estimated water fluxes show substantial spatial and temporal heterogeneities across the study region. Generally, in the west arid area, ET, R, and R/P decreased; while they increased in the eastern part of the study area during the last 108 years. In the recent 30 years, this region experienced a substantial decrease in R. Factorial simulation experiments indicate that climate change, particularly P, was the dominant factor controlling interannual variations of ET and R; while land use change had the same magnitude of effects on long-term trends in water fluxes as climate change did. To eliminate modeling uncertainties, high-resolution historical meteorological data sets and model parameterizations on anthropogenic effects, such as water use and dam constructions, should be developed.en_US
dc.formatPDFen_US
dc.relation.ispartofWater Resources Researchen_US
dc.relation.ispartofseries0043-1397en_US
dc.rights©American Geophysical Union 2013. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Liu, M., Tian, H., Yang, Q., Yang, J., Song, X., Lohrenz, S. E., & Cai, W. J. (2013). Long‐term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 1901–2008. Water Resources Research, 49(4), 1988-2012.en_US
dc.subjectGulf of Mexicoen_US
dc.subjectland useen_US
dc.subjectclimate changeen_US
dc.subjectwater resourcesen_US
dc.subjecthydrological modelen_US
dc.subjectevapotranspirationen_US
dc.subjectrunoffen_US
dc.titleLong-term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 19012008en_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume49en_US
dc.citation.issue4en_US
dc.citation.spage1988en_US
dc.citation.epage2012en_US
dc.description.statusPublisheden_US
dc.description.peerreviewyesen_US
dc.creator.orcid0000-0002-1806-4091en_US

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