Development of Observational Products and Coupled Models of Land-Ocean-Atmospheric Fluxes in the Mississippi River Watershed and Gulf of Mexico in Support of Carbon Monitoring
Information about carbon fluxes in continental margins and linkages to terrestrial carbon cycles is key focus of NASA s Earth Science Research Program and a central aspect of NASA s Carbon Monitoring System. The uncertainties in coastal carbon fluxes are such that the net uptake of carbon in the coastal margins remains a poorly constrained term in global budgets. In particular, our ability to estimate current air-sea CO2 fluxes in continental margins is limited, and there is even less capability for predicting changes in the CO2 uptake capacity in coastal waters. The need to improve the understanding of coastal carbon dynamics and precision of estimates of coastal carbon fluxes has implications for attribution of land sources and sinks because atmospheric inversions are sensitive to uncertainties in coastal boundaries. Moreover, characterization of trends in carbon inventories reveal an increasing fraction of fossil fuel carbon is remaining in the atmosphere due to reductions in the efficiencies of ocean sinks and other sink processes not considered in current models. The proposed research will employ a combination of models and remotely-sensed and in situ observations to develop georeferenced products and associated uncertainties for land-ocean exchange of carbon, air-sea exchanges of carbon dioxide, and coastal to open ocean exchanges of carbon. Such information is critically needed to better constrain the contribution of coastal margins to carbon sources and sinks and improve capabilities to attribute sources and sinks to different regions as well as reducing uncertainties in estimates. The proposed effort will use a combination of observations and coupled terrestrial and ocean models to examine carbon processes and fluxes from the watershed to the continental margin. A major aspect of this proposed project will be to establish and populate geospatial portals for sharing and analysis of carbon datasets and products. The primary region of study will be the Mississippi River watershed and northern Gulf of Mexico. However, the model domain will also include the continental margins of Florida and the South Atlantic Bight. The region of study provides an excellent setting to carry out this work as there are a large number of supporting datasets and on-going programs that will complement this work. The proposed work is closely aligned with objectives of the NASA Carbon Monitoring System scoping effort and of the North American Carbon Program and will support National Climate Assessment activities. The effort will also contribute to NASA Coastal Carbon Synthesis effort and international efforts to develop a North American carbon budget (CarboNA).
The unique nature of our approach, coupling models of terrestrial and ocean ecosystem dynamics and associated carbon processes, will allow for assessment of how societal and human-related LCLUC, as well as climate change, affects terrestrial carbon sources and sinks, export of materials to coastal margins, and associated carbon processes in the continental margins. Results would also benefit efforts to describe and predict how land cover and land use changes impact coastal water quality, including possible effects of coastal eutrophication, hypoxia, and ocean acidification.
Contact Support to request an email list of project participants.
Project URL(s):
None provided.
Data Products:
Product Title: Continental shelf-ocean exchanges of carbon and nitrogen
Time Period: 1904-1910, ; 2004-2010
Description: 1) MRB-C-Historical:
The variables include river discharge, dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), particulate organic carbon (POC), and total organic carbon (TOC).
2) MRB-C-Future:
The variables include river discharge, and dissolved inorganic carbon (DIC).
3) MRB-N-Historical:
The variables include river discharge, dissolved inorganic nitrogen (i.e., NH4+ and NO3-), and total organic nitrogen (TON).
.
Uncertainty Estimates: We will focus on quantifying the estimation errors and uncertainties induced by modeling algorithms, model parameters, input data and the coupling between land and ocean models. Formal assessment of uncertainty in coupled land surface-ocean models includes several steps: (1) identification of the output(s) of interests, (2) identification of a limited set of input parameters to which outputs are most sensitive, and that may vary depending on the output of interest, (3) development of the distributions for inputs and their correlation structure, (4) design and evaluation of a Monte Carlo experiment. The input parameters exhibiting the highest model sensitivity will be identified and studied in more detail.
Uncertainty Categories: ensemble
Application Areas: - Land management; - Global carbon budget calculations; - Watershed protection plans; - Ocean acidification mitigation
Relevant Policies/Programs: NACP, National Climate Assessment of U.S. Global Change Research Program, NASA Coastal Carbon Synthesis, Carbon North America (CarboNA), Coastal Zone Management Act, Clean Water Act (CWA), US-Mexico Bilateral Framework on Clean Energy and Climate Change (US-Mexico Bilateral)
Potential Users: EPA (Mississippi River/Gulf of Mexico Watershed Nutrient Task Force), NOAA, USGS, US Global Change Research Program, CMS terrestrial flux teams
Stakeholders:
Current Application Readiness Level: 4
Start Application Readiness Level: 1
Target Application Readiness Level: 4
Future Developments: - Populate the geospatial portal with modeled and observational data products and uncertainties.Z4N
Limitations: - Model validation is limited to locations and times when observational data were available. More model-data validation is needed to further refine the models and begin to evaluate future scenarios (e.g. climatic extremes).; - Since there is no available
Uncertainty Estimates: We will focus on quantifying the estimation errors and uncertainties induced by modeling algorithms, model parameters, input data and the coupling between land and ocean models. Formal assessment of uncertainty in coupled land surface-ocean models includes several steps: (1) identification of the output(s) of interests, (2) identification of a limited set of input parameters to which outputs are most sensitive, and that may vary depending on the output of interest, (3) development of the distributions for inputs and their correlation structure, (4) design and evaluation of a Monte Carlo experiment. The input parameters exhibiting the highest model sensitivity will be identified and studied in more detail.
Uncertainty Categories: ensemble
Application Areas: - Land management; - Global carbon budget calculations; - Watershed protection plans; - Ocean acidification mitigation
Relevant Policies/Programs: NACP, National Climate Assessment of U.S. Global Change Research Program, NASA Coastal Carbon Synthesis, Carbon North America (CarboNA), Coastal Zone Management Act, Clean Water Act (CWA), US-Mexico Bilateral Framework on Clean Energy and Climate Change (US-Mexico Bilateral)
Potential Users: EPA (Mississippi River/Gulf of Mexico Watershed Nutrient Task Force), NOAA, USGS, US Global Change Research Program, CMS terrestrial flux teams
Stakeholders: National Climate Assessment (Point of Contact: Fred Lipschultz, US Global Change Research Program, flipschultz@usgcrp.gov); USDA Environmental Markets Division (Point of Contact: Chris Hartley, chartley@oce.usda.gov)
Current Application Readiness Level: 4
Start Application Readiness Level: 1
Target Application Readiness Level: 4
Future Developments: - Populate the geospatial portal with modeled and observational data products and uncertainties.
Limitations: - Model validation is limited to locations and times when observational data were available. More model-data validation is needed to further refine the models and begin to evaluate future scenarios (e.g. climatic extremes).; - Since there is no available
Product Title: Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from Surface underway observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from the USS BOLD in the Gulf of Mexico from 2006-06-06 to 2006-09-11 (NCEI Accession 0117493)
Description: NODC Accession 0117493 includes Surface underway, chemical, meteorological and physical data collected from USS BOLD in the Gulf of Mexico from 2006-06-06 to 2006-09-11. These data include BAROMETRIC PRESSURE, Partial pressure (or fugacity) of carbon dioxide - water, SALINITY and SEA SURFACE TEMPERATURE. The instruments used to collect these data include Carbon dioxide (CO2) gas analyzer and Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement.
These data were collected by Wei-Jun Cai, Wei-Jen Huang and Yongchen Wang of University of Georgia; School of Marine Programs as part of the Coastal_UG_Gulf_of_Mexico_2006 data set. CDIAC assigned the following cruise ID(s) to this data set: 31B520060606 (GM0606) and 31B520060906 (GM0609).
The Global Coastal Carbon Data Project data includes the bottle (discrete) and surface (underway) carbon-related measurements from coastal research cruises, the data from time series cruises and coastal moorings. The coastal regions data are very important for the understanding of carbon cycle on the continental margins.
Uncertainty Estimates: We will focus on quantifying the estimation errors and uncertainties induced by modeling algorithms, model parameters, input data and the coupling between land and ocean models. Formal assessment of uncertainty in coupled land surface-ocean models includes several steps: (1) identification of the output(s) of interests, (2) identification of a limited set of input parameters to which outputs are most sensitive, and that may vary depending on the output of interest, (3) development of the distributions for inputs and their correlation structure, (4) design and evaluation of a Monte Carlo experiment. The input parameters exhibiting the highest model sensitivity will be identified and studied in more detail.
Uncertainty Categories: ensemble
Application Areas: - Land management; - Global carbon budget calculations; - Watershed protection plans; - Ocean acidification mitigation
Relevant Policies/Programs: NACP, National Climate Assessment of U.S. Global Change Research Program, NASA Coastal Carbon Synthesis, Carbon North America (CarboNA), Coastal Zone Management Act, Clean Water Act (CWA), US-Mexico Bilateral Framework on Clean Energy and Climate Change (US-Mexico Bilateral)
Potential Users: EPA (Mississippi River/Gulf of Mexico Watershed Nutrient Task Force), NOAA, USGS, US Global Change Research Program, CMS terrestrial flux teams
Stakeholders: NASA SeaBASS Database (Point of Contact: Joel Scott, joel.scott@nasa.gov); NOAA Ocean Acidification Program (Point of Contact: Libby Jewett, libby.jewett@noaa.gov and Dwight Gledhill, dwight.gledhill@noaa.gov); Surface Ocean Carbon Atlas (SOCAT) (Point of Contact: Benjamin Pfeil, benjamin.pfeil@gfi.uib.no)
Current Application Readiness Level: 4
Start Application Readiness Level: 1
Target Application Readiness Level: 4
Future Developments: - Populate the geospatial portal with modeled and observational data products and uncertainties.
Limitations: - Model validation is limited to locations and times when observational data were available. More model-data validation is needed to further refine the models and begin to evaluate future scenarios (e.g. climatic extremes).; - Since there is no available
Archived Data Citation: Cai, W.-J., Y. Wang, and W.-J. Huang. 2012. Sea Surface pCO2 measurements in the Gulf of Mexico during the Ocean Survey Vessel Bold cruises in 2006.
http://cdiac.ess-dive.lbl.gov/ftp/oceans/UG_GoM_UW_Data/2006.data. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. DOI: 10.3334/CDIAC/OTG.UG_GOM_UW_2006
Cai, W.-J., Y. Wang, and W.-J. Huang. 2012. Sea Surface pCO2 measurements in the Gulf of Mexico during the Ocean Survey Vessel Bold cruises in 2007.
http://cdiac.ess-dive.lbl.gov/ftp/oceans/UG_GoM_UW_Data/2007.data. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. DOI: 10.3334/CDIAC/OTG.UG_GOM_UW_2007
Cai, W.-J., Y. Wang and W.-J. Huang. 2014. Sea surface pCO2 survey in the Gulf of Mexico during the R/V Cape Hatteras cruises in 2009 and 2010. http://cdiac.ess-dive.lbl.gov/ftp/oceans/Cape_Hatteras_GM/.
Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. DOI: 10.3334/CDIAC/OTG.Cape_Hatteras_GM
Bounding Coordinates:
West Longitude:
-93.43010
East Longitude:
-87.33980
North Latitude:
30.23490
South Latitude:
28.17990
Product Title: Export and Leaching of Carbon and Nitrogen from Mississippi River Basin, 1901-2099
Start Date: 01/1901End Date: 12/2099 (1901-2099)
Description: This dataset provides estimates for export and leaching of dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), total organic carbon (TOC), particulate organic carbon (POC), ammonium (NH4+), nitrate (NO3-), and total organic nitrogen (TON) from the Mississippi River Basin (MRB) to the Gulf of Mexico. The estimates are provided for a historical period of 1901-2014, and a future period of 2010-2099 (carbon estimates only) under two scenarios of high and low levels of population growth, economy, and energy consumption, respectively. The estimates are from the Dynamic Land Ecosystem Model 2.0 (DLEM 2.0). These data are applicable to studying how changes in multiple environmental factors (e.g., fertilizer application, land-use changes, climate variability, atmospheric CO2, and N deposition) affect the dynamics of leaching and export to the Gulf of Mexico.
Status: Archived
CMS Science Theme(s): Land-Ocean Flux
Keywords: carbon; nitrogen
Spatial Extent: Mississippi River Basin
Spatial Resolution: Carbon data are 5 arc minute; nitrogen data are 7.5 arc minute
Temporal Frequency: annual
Input Data Products:
Algorithm/Models Used:
Evaluation:
Intercomparison Efforts/Gaps:
Uncertainty Estimates:
Uncertainty Categories:
Application Areas:
Relevant Policies/Programs:
Potential Users: Environmental managers, researchers, federal agencies including USGS, EPA, and NOAA
Archived Data Citation: Tian, H., S.E. Lohrenz, S. Pan, W.J. Cai, and R. He. 2019. Export and Leaching of Carbon and Nitrogen from Mississippi River Basin, 1901-2099. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1699
Bounding Coordinates:
West Longitude:
-126.00000
East Longitude:
-62.00000
North Latitude:
53.00000
South Latitude:
24.50000
Product Title: CMS: Annual Estimates of Global Riverine Nitrous Oxide Emissions, 1900-2016
Start Date: 01/1900End Date: 12/2016 (1900-2016)
Description: This dataset provides modeled estimates of annual nitrous oxide (N2O) emissions at a coarse geographic scale (0.5 x 0.5 degree) for two sets of global rivers and streams covering the period of 1900-2016. Emissions (g N2O-N/yr) are provided for higher-order rivers and streams (4th order). The estimates were derived from a water transport model, the Model for Scale Adaptive River Transport (MOSART), coupled with the Dynamic Land Ecosystem Model (DLEM) to link hydrology and ecosystem processes pertaining to N2O flux and transport. Factors driving the model included climate, land use and land cover, and nitrogen inputs (i.e., fertilizer, deposition, manure, and sewage). Nitrogen discharges from streams and rivers to the ocean were calibrated from observations from 50 river basins across the globe.
Archived Data Citation: Yao, Y., and H. Tian. 2021. CMS: Annual Estimates of Global Riverine Nitrous Oxide Emissions, 1900-2016. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1791
Bounding Coordinates:
West Longitude:
-180.00000
East Longitude:
180.00000
North Latitude:
88.50000
South Latitude:
-88.50000
Publications:
Chakraborty, S., Lohrenz, S. E., Gundersen, K. 2017. Photophysiological and light absorption properties of phytoplankton communities in the river-dominated margin of the northern
G
ulf of
M
exico. Journal of Geophysical Research: Oceans. 122(6), 4922-4938. DOI: 10.1002/2016JC012092
Lohrenz, S. E., Cai, W., Chakraborty, S., Huang, W., Guo, X., He, R., Xue, Z., Fennel, K., Howden, S., Tian, H. 2018. Satellite estimation of coastal pCO2 and air-sea flux of carbon dioxide in the northern Gulf of Mexico. Remote Sensing of Environment. 207, 71-83. DOI: 10.1016/j.rse.2017.12.039
Tian, H., Ren, W., Yang, J., Tao, B., Cai, W., Lohrenz, S. E., Hopkinson, C. S., Liu, M., Yang, Q., Lu, C., Zhang, B., Banger, K., Pan, S., He, R., Xue, Z. 2015. Climate extremes dominating seasonal and interannual variations in carbon export from the Mississippi River Basin. Global Biogeochemical Cycles. 29(9), 1333-1347. DOI: 10.1002/2014GB005068
Tian, H., Xu, R., Pan, S., Yao, Y., Bian, Z., Cai, W., Hopkinson, C. S., Justic, D., Lohrenz, S., Lu, C., Ren, W., Yang, J. 2020. Long-Term Trajectory of Nitrogen Loading and Delivery From Mississippi River Basin to the Gulf of Mexico. Global Biogeochemical Cycles. 34(5). DOI: 10.1029/2019GB006475
Zhang, B., Tian, H., Lu, C., Chen, G., Pan, S., Anderson, C., Poulter, B. 2017. Methane emissions from global wetlands: An assessment of the uncertainty associated with various wetland extent data sets. Atmospheric Environment. 165, 310-321. DOI: 10.1016/j.atmosenv.2017.07.001
Cai, W., Arthur Chen, C. T., Borges, A. 2013. Carbon dioxide dynamics and fluxes in coastal waters influenced by river plumes in: Biogeochemical Dynamics at Major River-Coastal Interfaces. Cambridge University Press, 155-173. DOI: 10.1017/CBO9781139136853.010
Lohrenz, S. E., Cai, W., Chakraborty, S., Gundersen, K., Murrell, M. C. 2013. Nutrient and carbon dynamics in a large river-dominated coastal ecosystem: the Mississippi-Atchafalaya River system in: Biogeochemical Dynamics at Major River-Coastal Interfaces. Cambridge University Press, 448-472. DOI: 10.1017/CBO9781139136853.023
Huang, W., Cai, W., Castelao, R. M., Wang, Y., Lohrenz, S. E. 2013. Effects of a wind-driven cross-shelf large river plume on biological production and CO2
uptake on the Gulf of Mexico during spring. Limnology and Oceanography. 58(5), 1727-1735. DOI: 10.4319/lo.2013.58.5.1727
Xue, Z., He, R., Fennel, K., Cai, W., Lohrenz, S., Hopkinson, C. 2013. Modeling ocean circulation and biogeochemical variability in the Gulf of Mexico. Biogeosciences. 10(11), 7219-7234. DOI: 10.5194/bg-10-7219-2013
Liu, M., Tian, H., Yang, Q., Yang, J., Song, X., Lohrenz, S. E., Cai, W. 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. DOI: 10.1002/wrcr.20180
Chen, G., Tian, H., Zhang, C., Liu, M., Ren, W., Zhu, W., Chappelka, A. H., Prior, S. A., Lockaby, G. B. 2012. Drought in the Southern United States over the 20th century: variability and its impacts on terrestrial ecosystem productivity and carbon storage. Climatic Change. 114(2), 379-397. DOI: 10.1007/s10584-012-0410-z
Guo, X., Cai, W., Huang, W., Wang, Y., Chen, F., Murrell, M. C., Lohrenz, S. E., Jiang, L., Dai, M., Hartmann, J., Lin, Q., Culp, R. 2011. Carbon dynamics and community production in the Mississippi River plume. Limnology and Oceanography. 57(1), 1-17. DOI: 10.4319/lo.2012.57.1.0001
Hopkinson, C. S., Cai, W., Hu, X. 2012. Carbon sequestration in wetland dominated coastal systems--a global sink of rapidly diminishing magnitude. Current Opinion in Environmental Sustainability. 4(2), 186-194. DOI: 10.1016/j.cosust.2012.03.005
Huang, W., Wang, Y., Cai, W. 2012. Assessment of sample storage techniques for total alkalinity and dissolved inorganic carbon in seawater. Limnology and Oceanography: Methods. 10(9), 711-717. DOI: 10.4319/lom.2012.10.711
Tian, H., Lu, C., Chen, G., Tao, B., Pan, S., Grosso, S. J. D., Xu, X., Bruhwiler, L., Wofsy, S. C., Kort, E. A., Prior, S. A. 2012. Contemporary and projected biogenic fluxes of methane and nitrous oxide in North American terrestrial ecosystems. Frontiers in Ecology and the Environment. 10(10), 528-536. DOI: 10.1890/120057
Tian, H., Chen, G., Zhang, C., Liu, M., Sun, G., Chappelka, A., Ren, W., Xu, X., Lu, C., Pan, S., Chen, H., Hui, D., McNulty, S., Lockaby, G., Vance, E. 2012. Century-Scale Responses of Ecosystem Carbon Storage and Flux to Multiple Environmental Changes in the Southern United States. Ecosystems. 15(4), 674-694. DOI: 10.1007/s10021-012-9539-x
Xu, X. F., Tian, H. Q., Chen, G. S., Liu, M. L., Ren, W., Lu, C. Q., Zhang, C. 2012. Multifactor controls on terrestrial N<sub>2</sub>O flux over North America from 1979 through 2010. Biogeosciences. 9(4), 1351-1366. DOI: 10.5194/bg-9-1351-2012
Zhang, C., Tian, H., Chen, G., Chappelka, A., Xu, X., Ren, W., Hui, D., Liu, M., Lu, C., Pan, S., Lockaby, G. 2012. Impacts of urbanization on carbon balance in terrestrial ecosystems of the Southern United States. Environmental Pollution. 164, 89-101. DOI: 10.1016/j.envpol.2012.01.020
Tian, H., Chen, G., Lu, C., Xu, X., Hayes, D. J., Ren, W., Pan, S., Huntzinger, D. N., Wofsy, S. C. 2014. North American terrestrial CO2 uptake largely offset by CH4 and N2O emissions: toward a full accounting of the greenhouse gas budget. Climatic Change. 129(3-4), 413-426. DOI: 10.1007/s10584-014-1072-9
Tao, B., Tian, H., Ren, W., Yang, J., Yang, Q., He, R., Cai, W., Lohrenz, S. 2014. Increasing Mississippi river discharge throughout the 21st century influenced by changes in climate, land use, and atmospheric CO2. Geophysical Research Letters. 41(14), 4978-4986. DOI: 10.1002/2014GL060361
Chen, G., Tian, H., Huang, C., Prior, S. A., Pan, S. 2013. Integrating a process-based ecosystem model with Landsat imagery to assess impacts of forest disturbance on terrestrial carbon dynamics: Case studies in Alabama and Mississippi. Journal of Geophysical Research: Biogeosciences. 118(3), 1208-1224. DOI: 10.1002/jgrg.20098
Wang, Z. A., Wanninkhof, R., Cai, W., Byrne, R. H., Hu, X., Peng, T., Huang, W. 2013. The marine inorganic carbon system along the Gulf of Mexico and Atlantic coasts of the United States: Insights from a transregional coastal carbon study. Limnology and Oceanography. 58(1), 325-342. DOI: 10.4319/lo.2013.58.1.0325
Xue, Z., He, R., Fennel, K., Cai, W., Lohrenz, S., Huang, W., Tian, H., Ren, W., Zang, Z. 2016. Modeling <i>p</i>CO<sub>2</sub> variability in the Gulf of Mexico. Biogeosciences. 13(15), 4359-4377. DOI: 10.5194/bg-13-4359-2016
Archived Data Citations:
Cai, W.-J., Y. Wang, and W.-J. Huang. 2012. Sea Surface pCO2 measurements in the Gulf of Mexico during the Ocean Survey Vessel Bold cruises in 2006.
http://cdiac.ess-dive.lbl.gov/ftp/oceans/UG_GoM_UW_Data/2006.data. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. DOI: 10.3334/CDIAC/OTG.UG_GOM_UW_2006
Cai, W.-J., Y. Wang, and W.-J. Huang. 2012. Sea Surface pCO2 measurements in the Gulf of Mexico during the Ocean Survey Vessel Bold cruises in 2007.
http://cdiac.ess-dive.lbl.gov/ftp/oceans/UG_GoM_UW_Data/2007.data. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. DOI: 10.3334/CDIAC/OTG.UG_GOM_UW_2007
Cai, W.-J., Y. Wang and W.-J. Huang. 2014. Sea surface pCO2 survey in the Gulf of Mexico during the R/V Cape Hatteras cruises in 2009 and 2010. http://cdiac.ess-dive.lbl.gov/ftp/oceans/Cape_Hatteras_GM/.
Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. DOI: 10.3334/CDIAC/OTG.Cape_Hatteras_GM
Tian, H., S.E. Lohrenz, S. Pan, W.J. Cai, and R. He. 2019. Export and Leaching of Carbon and Nitrogen from Mississippi River Basin, 1901-2099. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1699
Yao, Y., and H. Tian. 2021. CMS: Annual Estimates of Global Riverine Nitrous Oxide Emissions, 1900-2016. ORNL DAAC, Oak Ridge, Tennessee, USA. DOI: 10.3334/ORNLDAAC/1791
2015 NASA Carbon Cycle & Ecosystems Joint Science Workshop Poster(s)
Ocean margins as an increasing sink for the atmospheric carbon dioxide
-- (Wei-Jun Cai, Goulven Laruelle, Xinping Hu, Pierre Regnier)
[abstract]
Integrated Observation and Modeling of Carbon Cycle Processes Across Terrestrial-Coastal Interfaces: Reducing Uncertainties and Enhancing Linkages to Decision Support -- (Steven Lohrenz, Hanqin Tian, Wei-Jun Cai, Ruoying He) [abstract]
[poster]
Contemporary and projected lateral carbon fluxes from North America to Oceans: A process-based modeling study -- (Hanqin Tian, Qichun Yang, Bowen Zhang, Jia Yang, Shufen Pan, Wei Ren, Chaoqun Lu, Bo Tao, Steven Lohrenz, Wei-Jun Cai, Ruoying He, Marjorie Friedrichs, Raymond Najjar) [abstract]
Impacts of terrestrial exports on carbon dynamics of the northern Gulf of Mexico -- (Wei-jun Cai) [abstract]
Impacts of Population Growth, Urbanization and Agricultural Expansion on Riverine Fluxes and Coastal Ecosystems in the Southeastern U.S. as assessed by the Coupled Land-Ocean Modeling System, Part 1: Riverine Flux Variations -- (Hanqin Tian, Ruoying He, Wei Ren, Bo Tao, Jia Yang, Chaoqun Lu, Qichun Yang, Bowen Zhang, Zuo Xue, Joseph Zambon, Wei-jun Cai, Steven Lohrenz) [abstract]
Impacts of Population Growth, Urbanization and Agricultural Expansion on Riverine Fluxes and Coastal Ecosystems in the Southeastern U.S. as assessed by the Coupled Land-Ocean Modeling System, Part 2: Marine Ecosystem Responses -- (Ruoying He, Hanqin Tian, Zuo Xue, Joseph Zambon, Zhigang Yao, Wei Ren, Chaoqun Lu, Bo Tao, Wei-jun Cai, Steven Lohrenz) [abstract]