This research works to quantitatively investigate the dynamics of the hydrological and biogeochemical cycles at land-ocean interfaces in responses to historical and future environmental changes in climate, atmospheric CO2, nitrogen deposition, land use and management (left panel). This study shows that over past 110 years, the dissolved organic carbon (DOC) export from the Mississippi River to the Gulf of Mexico were found largely increasing (right panel). Factorial analyses suggest that land use and land cover change, including land management practices (i.e., fertilization, irrigation, tillage, etc.), were the dominant contributors to the century-scale trend of rising total riverine DOC export, and followed by changes in atmospheric CO2, nitrogen deposition, and climate.
2016 “Century-long increasing trend and variability of dissolved organic carbon export from the Mississippi River basin driven by natural and anthropogenic forcing", Ren, W., H. Tian, W. Cai, S.E. Lohrenz, C.S. Hopkinson, W. Huang, J. Yang, B. Tao, S.F. Pan, and R. He, Global Biogeochemical Cycles, DOI: 10.1002/2016GB005395
2015 “Climate extremes dominating seasonal and interannual variations in carbon export from the Mississippi River Basin”, Tian, H. Q., W. Ren, J. Yang, B. Tao, W. J. Cai, S. E. Lohrenz, C. S. Hopkinson, M. L. Liu, Q. C. Yang, C. Q. Lu, B. W. Zhang, K. Banger, S. F. Pan, R. Y. He, and Z. Xue, Global Biogeochem Cy, 29, doi: 10.1002/2014GB005068
2015 “Large increase in dissolved inorganic carbon flux from the Mississippi River to Gulf of Mexico due to climatic and anthropogenic changes over the 21st century”, Ren, W., H. Q. Tian, B. Tao, J. Yang, S. F. Pan, W. J. Cai, S. E. Lohrenz, R. Y. He, and C. S. Hopkinson, J Geophys Res-Biogeo, 120(4), 724-736, doi: 10.1002/2014jg002761.
2014 “Increasing Mississippi river discharge throughout the 21st century influenced by changes in climate, land use, and atmospheric CO2”, Tao, B., H. Tian, W. Ren, J. Yang, Q. Yang, R. He, W. Cai, and S. Lohrenz (2014), Geophys Res Lett, 41(14), 2014GL060361, doi:10.1002/2014gl060361.
Global Changes and Ecosystem Dynamics
@ 2016-2025 | Department of Plant and Soil Sciences | College of Agriculture, food and Environment | University of Kentucky