Results 51 to 60 of about 33,080 (279)

Effects of Polyvalent Cations on FTIR Spectra of Organic Matter–Cation Associations

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background The composition of soil organic matter (SOM) can be characterized by functional groups in the organic matter (OM). The carboxylic acid and carboxylate groups of OM show specific absorption bands in Fourier‐transform infrared (FTIR) spectra. However, cation–OM interactions may affect absorption bands and limit spectral interpretation
Nisha Bhattarai, Ruth H. Ellerbrock, Horst H. Gerke   +2 more
wiley   +1 more source

Simulating Marine Ecosystem Dynamics and Biogeochemical Cycling With Multiple Plankton Functional Types

Journal of Advances in Modeling Earth Systems
Current representations of marine ecosystems in Earth System Models are greatly simplified, neglecting key interactions between dynamic food webs, biogeochemistry, and climate change.
Jun Yu, Kristen M. Krumhardt, J. Keith Moore, Robert T. Letscher, Shanlin Wang, Nicola A. Wiseman, Matthew C. Long, Keith Lindsay, Michael Levy, Colleen M. Petrik, Adam C. Martiny   +10 more
doaj   +1 more source

The DOE E3SM v1.1 Biogeochemistry Configuration: Description and Simulated Ecosystem‐Climate Responses to Historical Changes in Forcing

Journal of Advances in Modeling Earth Systems, 2020
This paper documents the biogeochemistry configuration of the Energy Exascale Earth System Model (E3SM), E3SMv1.1‐BGC. The model simulates historical carbon cycle dynamics, including carbon losses predicted in response to land use and land cover change ...
S. Burrows, M. Maltrud, X. Yang, Q. Zhu, N. Jeffery, Xiupeng Shi, D. Ricciuto, S. Wang, G. Bisht, J. Tang, J. Wolfe, B. Harrop, B. Singh, L. Brent, S. Baldwin, T. Zhou, P. Cameron-smith, N. Keen, N. Collier, M. Xu, E. Hunke, S. Elliott, A. Turner, H. Li, H. Wang, J. Golaz, B. Bond‐Lamberty, F. Hoffman, W. Riley, P. Thornton, K. Calvin, L. Leung   +31 more
semanticscholar   +1 more source

From Ice to Isolation: A geochemical reconstruction of the palaeoenvironmental evolution of Gairloch, NW Scotland (UK), since the Last Glacial Maximum

Journal of Quaternary Science, EarlyView.
ABSTRACT Complex relative sea‐level (RSL) changes are associated with the deglaciation of the British and Irish Ice Sheet (BIIS). Sediment archives from Loch Bad na h‐Achlaise, an isolation basin in NW Scotland, UK, span Late Glacial to Holocene time and record sea‐level change and ice proximity via a geochemical and biostratigraphic multiproxy ...
Jennifer Taylor, David Selby, Jeremy M. Lloyd, Louise Best, Luca Podrecca, Bradley B. Sageman, Alexander R. Simms   +6 more
wiley   +1 more source

Carbon, Nitrogen, and Corresponding Stable Isotope Signatures Reveal Channel Banks as Major Sediment Sources in a Tropical Agricultural Watershed

Land Degradation &Development, EarlyView.
ABSTRACT Uncertainties about the applicability of δ13C and δ15N as tracers of sediment sources in tropical river basins highlight the need for more in‐depth investigations of these isotopes. This study therefore assessed the effectiveness of δ13C and δ15N signatures in discriminating sediment sources in an agricultural catchment in Northeast Brazil ...
Fábio Farias Amorim, Yuri Jacques Agra Bezerra da Silva, Rennan Cabral Nascimento, Ygor Jacques Agra Bezerra da Silva, Angelo Jamil Maia, Tales Tiecher, Jean Paolo Gomes Minella, Yusheng Zhang, Hari Ram Upadhayay, Simon Pulley, Adrian L. Collins   +10 more
wiley   +1 more source

Carbon and Nitrogen in the Lower Basin of the Paraíba do Sul River, Southeastern Brazil: Element fluxes and biogeochemical processes

Revista Ambiente & Água, 2011
The study was conducted in the lower basin of the Paraíba do Sul River (PSR), in which 57,000 km2 of the basin is located in the Brazilian states of São Paulo, Minas Gerais and Rio de Janeiro. We proposed to identify the main sources of C and N fluxes in
Luiz Antonio Martinelli, Carlos Eduardo de Rezende, Alvaro Ramon Coelho Ovalle, Ricardo de Oliveira Figueiredo   +3 more
doaj   +1 more source

Distribution and microbial degradation of dissolved organic carbon in the northern South China Sea

Frontiers in Marine Science, 2022
Dissolved organic carbon (DOC) is the largest reduced carbon pool in the ocean, and it plays significant roles not only in the ocean carbon cycle but also in the control of many biogeochemical processes in the ocean.
Ling Ding, Ling Ding, Sen Shan, Chunle Luo, Xuchen Wang   +4 more
doaj   +1 more source

Impact of Nitrogen Deposition on Carbon and Nitrogen Cycling in Peatlands Under Land‐Use Change

Land Degradation &Development, EarlyView.
ABSTRACT Increasing nitrogen (N) deposition significantly alters carbon and N dynamics in peatlands by affecting microbial processes, enhancing greenhouse gas emissions and nutrient leaching into adjacent waters. However, how peatland conversion for agriculture and forestry influences the fate of added N under elevated atmospheric deposition remains ...
Yujing Deng, Kyle S. Boodoo, Klaus‐Holger Knorr, Stephan Glatzel   +3 more
wiley   +1 more source

Ecological homogenization of soil properties in the American residential macrosystem

Ecosphere, 2022
The conversion of native ecosystems to residential ecosystems dominated by lawns has been a prevailing land‐use change in the United States over the past 70 years.
Christopher D. Ryan, Peter M. Groffman, J. Morgan Grove, Sharon J. Hall, James B. Heffernan, Sarah E. Hobbie, Dexter H. Locke, Jennifer L. Morse, Christopher Neill, Kristen C. Nelson, Jarlath O'Neil‐Dunne, Rinku Roy Chowdhury, Meredith K. Steele, Tara L. E. Trammell   +13 more
doaj   +1 more source

Review article: How does glacier discharge affect marine biogeochemistry and primary production in the Arctic?

The Cryosphere, 2019
. Freshwater discharge from glaciers is increasing across the Arctic in response to anthropogenic climate change, which raises questions about the potential downstream effects in the marine environment.
M. Hopwood, D. Carroll, T. Dunse, A. Hodson, J. Holding, J. Iriarte, S. Ribeiro, E. Achterberg, C. Cantoni, D. Carlson, M. Chierici, J. Clarke, S. Cozzi, A. Fransson, T. Juul‐Pedersen, M. Winding, L. Meire   +16 more
semanticscholar   +1 more source