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Biogeosciences Discussions (BGD)
Journal Prestige (SJR): 0.228

Number of Followers: 3

This is an Open Access Journal

Open Access journal
ISSN (Print) 1810-6277 - ISSN (Online) 1810-6285
Published by Copernicus Publications

[54 journals]

Using eddy covariance observations to determine the carbon sequestration
characteristics of subalpine forests in the Qinghai–Tibet Plateau
- Abstract: Using eddy covariance observations to determine the carbon sequestration characteristics of subalpine forests in the Qinghai–Tibet Plateau
  Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
  Biogeosciences, 21, 3509–3522, https://doi.org/10.5194/bg-21-3509-2024, 2024
  Our study delves into the vital role of subalpine forests in the Qinghai–Tibet Plateau as carbon sinks in the context of climate change. Utilizing advanced eddy covariance systems, we uncover their significant carbon sequestration potential, observing distinct seasonal patterns influenced by temperature, humidity, and radiation. Notably, these forests exhibit robust carbon absorption, with potential implications for global carbon balance.
  PubDate: Tue, 06 Aug 2024 02:56:13 +020
  DOI: 10.5194/bg-21-3509-2024 2024
Reefal ostracod assemblages from the Zanzibar Archipelago (Tanzania)
- Abstract: Reefal ostracod assemblages from the Zanzibar Archipelago (Tanzania)
  Skye Yunshu Tian, Martin Langer, Moriaki Yasuhara, and Chih-Lin Wei
  Biogeosciences, 21, 3523–3536, https://doi.org/10.5194/bg-21-3523-2024, 2024
  Through the first large-scale study of meiobenthic ostracods from the diverse and productive reef ecosystem in the Zanzibar Archipelago, Tanzania, we found that the diversity and composition of ostracod assemblages as controlled by benthic habitats and human impacts were indicative of overall reef health, and we highlighted the usefulness of ostracods as a model proxy to monitor and understand the degradation of reef ecosystems from the coral-dominated phase to the algae-dominated phase.
  PubDate: Tue, 06 Aug 2024 02:56:13 +020
  DOI: 10.5194/bg-21-3523-2024 2024
Patterns and drivers of organic matter decomposition in peatland
open-water pools
- Abstract: Patterns and drivers of organic matter decomposition in peatland open-water pools
  Julien Arsenault, Julie Talbot, Tim R. Moore, Klaus-Holger Knorr, Henning Teickner, and Jean-François Lapierre
  Biogeosciences, 21, 3491–3507, https://doi.org/10.5194/bg-21-3491-2024, 2024
  Peatlands are among the largest carbon (C) sinks on the planet. However, peatland features such as open-water pools emit more C than they accumulate because of higher decomposition than production. With this study, we show that the rates of decomposition vary among pools and are mostly driven by the environmental conditions in pools rather than by the nature of the material being decomposed. This means that changes in pool number or size may modify the capacity of peatlands to accumulate C.
  PubDate: Fri, 02 Aug 2024 00:26:40 +020
  DOI: 10.5194/bg-21-3491-2024 2024
Climatic controls on metabolic constraints in the ocean
- Abstract: Climatic controls on metabolic constraints in the ocean
  Precious Mongwe, Matthew Long, Takamitsu Ito, Curtis Deutsch, and Yeray Santana-Falcón
  Biogeosciences, 21, 3477–3490, https://doi.org/10.5194/bg-21-3477-2024, 2024
  We use a collection of measurements that capture the physiological sensitivity of organisms to temperature and oxygen and a CESM1 large ensemble to investigate how natural climate variations and climate warming will impact the ability of marine heterotrophic marine organisms to support habitats in the future. We find that warming and dissolved oxygen loss over the next several decades will reduce the volume of ocean habitats and will increase organisms' vulnerability to extremes.
  PubDate: Thu, 01 Aug 2024 00:26:40 +020
  DOI: 10.5194/bg-21-3477-2024 2024
Dissolved nitric oxide in the lower Elbe Estuary and the Port of Hamburg
area
- Abstract: Dissolved nitric oxide in the lower Elbe Estuary and the Port of Hamburg area
  Riel Carlo O. Ingeniero, Gesa Schulz, and Hermann W. Bange
  Biogeosciences, 21, 3425–3440, https://doi.org/10.5194/bg-21-3425-2024, 2024
  Our research is the first to measure dissolved NO concentrations in temperate estuarine waters, providing insights into its distribution under varying conditions and enhancing our understanding of its production processes. Dissolved NO was supersaturated in the Elbe Estuary, indicating that it is a source of atmospheric NO. The observed distribution of dissolved NO most likely resulted from nitrification.
  PubDate: Tue, 30 Jul 2024 00:26:40 +020
  DOI: 10.5194/bg-21-3425-2024 2024
When and why microbial-explicit soil organic carbon models can be unstable
- Abstract: When and why microbial-explicit soil organic carbon models can be unstable
  Erik Schwarz, Samia Ghersheen, Salim Belyazid, and Stefano Manzoni
  Biogeosciences, 21, 3441–3461, https://doi.org/10.5194/bg-21-3441-2024, 2024
  The occurrence of unstable equilibrium points (EPs) could impede the applicability of microbial-explicit soil organic carbon models. For archetypal model versions we identify when instability can occur and describe mathematical conditions to avoid such unstable EPs. We discuss implications for further model development, highlighting the important role of considering basic ecological principles to ensure biologically meaningful models.
  PubDate: Tue, 30 Jul 2024 00:26:40 +020
  DOI: 10.5194/bg-21-3441-2024 2024
Effects of grain size and seawater salinity on magnesium hydroxide
dissolution and secondary calcium carbonate precipitation kinetics:
implications for ocean alkalinity enhancement
- Abstract: Effects of grain size and seawater salinity on magnesium hydroxide dissolution and secondary calcium carbonate precipitation kinetics: implications for ocean alkalinity enhancement
  Charly A. Moras, Tyler Cyronak, Lennart T. Bach, Renaud Joannes-Boyau, and Kai G. Schulz
  Biogeosciences, 21, 3463–3475, https://doi.org/10.5194/bg-21-3463-2024, 2024
  We investigate the effects of mineral grain size and seawater salinity on magnesium hydroxide dissolution and calcium carbonate precipitation kinetics for ocean alkalinity enhancement. Salinity did not affect the dissolution, but calcium carbonate formed earlier at lower salinities due to the lower magnesium and dissolved organic carbon concentrations. Smaller grain sizes dissolved faster but calcium carbonate precipitated earlier, suggesting that medium grain sizes are optimal for kinetics.
  PubDate: Tue, 30 Jul 2024 00:26:40 +020
  DOI: 10.5194/bg-21-3463-2024 2024
Linking geomorphological processes and wildlife microhabitat selection:
nesting birds select refuges generated by permafrost degradation in the
Arctic
- Abstract: Linking geomorphological processes and wildlife microhabitat selection: nesting birds select refuges generated by permafrost degradation in the Arctic
  Madeleine-Zoé Corbeil-Robitaille, Éliane Duchesne, Daniel Fortier, Christophe Kinnard, and Joël Bêty
  Biogeosciences, 21, 3401–3423, https://doi.org/10.5194/bg-21-3401-2024, 2024
  In the Arctic tundra, climate change is transforming the landscape, and this may impact wildlife. We focus on three nesting bird species and the islets they select as refuges from their main predator, the Arctic fox. A geomorphological process, ice-wedge polygon degradation, was found to play a key role in creating these refuges. This process is likely to affect predator–prey dynamics in the Arctic tundra, highlighting the connections between nature's physical and ecological systems.
  PubDate: Wed, 24 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3401-2024 2024
The impacts of modelling prescribed vs. dynamic land cover in a high-CO2
future scenario – greening of the Arctic and Amazonian dieback
- Abstract: The impacts of modelling prescribed vs. dynamic land cover in a high-CO2 future scenario – greening of the Arctic and Amazonian dieback
  Sian Kou-Giesbrecht, Vivek K. Arora, Christian Seiler, and Libo Wang
  Biogeosciences, 21, 3339–3371, https://doi.org/10.5194/bg-21-3339-2024, 2024
  Terrestrial biosphere models can either prescribe the geographical distribution of biomes or simulate them dynamically, capturing climate-change-driven biome shifts. We isolate and examine the differences between these different land cover implementations. We find that the simulated terrestrial carbon sink at the end of the 21st century is twice as large in simulations with dynamic land cover than in simulations with prescribed land cover due to important range shifts in the Arctic and Amazon.
  PubDate: Wed, 24 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3339-2024 2024
The biological and preformed carbon pumps in perpetually slower and warmer
oceans
- Abstract: The biological and preformed carbon pumps in perpetually slower and warmer oceans
  Benoît Pasquier, Mark Holzer, and Matthew A. Chamberlain
  Biogeosciences, 21, 3373–3400, https://doi.org/10.5194/bg-21-3373-2024, 2024
  How do perpetually slower and warmer oceans sequester carbon' Compared to the preindustrial state, we find that biological productivity declines despite warming-stimulated growth because of a lower nutrient supply from depth. This throttles the biological carbon pump, which still sequesters more carbon because it takes longer to return to the surface. The deep ocean is isolated from the surface, allowing more carbon from the atmosphere to pass through the ocean without contributing to biology.
  PubDate: Wed, 24 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3373-2024 2024
Climate-based prediction of carbon fluxes from deadwood in Australia
- Abstract: Climate-based prediction of carbon fluxes from deadwood in Australia
  Elizabeth S. Duan, Luciana Chavez Rodriguez, Nicole Hemming-Schroeder, Baptiste Wijas, Habacuc Flores-Moreno, Alexander W. Cheesman, Lucas A. Cernusak, Michael J. Liddell, Paul Eggleton, Amy E. Zanne, and Steven D. Allison
  Biogeosciences, 21, 3321–3338, https://doi.org/10.5194/bg-21-3321-2024, 2024
  Understanding the link between climate and carbon fluxes is crucial for predicting how climate change will impact carbon sinks. We estimated carbon dioxide (CO2) fluxes from deadwood in tropical Australia using wood moisture content and temperature. Our model predicted that the majority of deadwood carbon is released as CO2, except when termite activity is detected. Future models should also incorporate wood traits, like species and chemical composition, to better predict fluxes.
  PubDate: Tue, 23 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3321-2024 2024
Distinguishing mature and immature trees allows estimating forest carbon
uptake from stand structure
- Abstract: Distinguishing mature and immature trees allows estimating forest carbon uptake from stand structure
  Samuel M. Fischer, Xugao Wang, and Andreas Huth
  Biogeosciences, 21, 3305–3319, https://doi.org/10.5194/bg-21-3305-2024, 2024
  Understanding the drivers of forest productivity is key for accurately assessing forests’ role in the global carbon cycle. Yet, despite significant research effort, it is not fully understood how the productivity of a forest can be deduced from its stand structure. We suggest tackling this problem by identifying the share and structure of immature trees within forests and show that this approach could significantly improve estimates of forests’ net productivity and carbon uptake.
  PubDate: Fri, 19 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3305-2024 2024
Assessment of carbon mass in a Mediterranean downy oak ecosystem using
airborne lidar and NASA Global Ecosystem Dynamics Investigation (GEDI)
data
- Abstract: Assessment of carbon mass in a Mediterranean downy oak ecosystem using airborne lidar and NASA Global Ecosystem Dynamics Investigation (GEDI) data
  Maëlie Chazette, Patrick Chazette, Ilja M. Reiter, Xiaoxia Shang, Julien Totems, Jean-Philippe Orts, Irène Xueref-Remy, and Nicolas Montes
  Biogeosciences, 21, 3289–3303, https://doi.org/10.5194/bg-21-3289-2024, 2024
  The approach presented is original in its coupling between field observations and airborne lidar observations. It has been applied to an instrumented reference forest site in the south of France, which is heavily impacted by climate change. It leads to the evaluation of tree heights and ends with assessments of aerial and root carbon stocks. A detailed assessment of uncertainties is presented to add a level of reliability to the scientific products delivered.
  PubDate: Fri, 19 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3289-2024 2024
Composite calcite and opal test in Foraminifera (Rhizaria)
- Abstract: Composite calcite and opal test in Foraminifera (Rhizaria)
  Julien Richirt, Satoshi Okada, Yoshiyuki Ishitani, Katsuyuki Uematsu, Akihiro Tame, Kaya Oda, Noriyuki Isobe, Toyoho Ishimura, Masashi Tsuchiya, and Hidetaka Nomaki
  Biogeosciences, 21, 3271–3288, https://doi.org/10.5194/bg-21-3271-2024, 2024
  We report the first benthic foraminifera with a composite test (i.e. shell) made of opal, which coats the inner part of the calcitic layer. Using comprehensive techniques, we describe the morphology and the composition of this novel opal layer and provide evidence that the opal is precipitated by the foraminifera itself. We explore the potential precipitation process and function(s) of this composite test and further discuss the possible implications for palaeoceanographic reconstructions.
  PubDate: Fri, 19 Jul 2024 15:56:22 +020
  DOI: 10.5194/bg-21-3271-2024 2024
The influence of plant water stress on vegetation–atmosphere exchanges:
implications for ozone modelling
- Abstract: The influence of plant water stress on vegetation–atmosphere exchanges: implications for ozone modelling
  Tamara Emmerichs, Yen-Sen Lu, and Domenico Taraborrelli
  Biogeosciences, 21, 3251–3269, https://doi.org/10.5194/bg-21-3251-2024, 2024
  We assess the representation of the plant response to surface water in a global atmospheric chemistry model. This sensitivity is crucial for the return of precipitation back into the atmosphere and thus significantly impacts the representation of weather as well as air quality. The newly implemented response function reduces this process and has a better comparison with satellite observations. This yields a higher intensity of unusual warm periods and higher production of air pollutants.
  PubDate: Wed, 17 Jul 2024 18:52:49 +020
  DOI: 10.5194/bg-21-3251-2024 2024
Isotopomer labeling and oxygen dependence of hybrid nitrous oxide
production
- Abstract: Isotopomer labeling and oxygen dependence of hybrid nitrous oxide production
  Colette L. Kelly, Nicole M. Travis, Pascale Anabelle Baya, Claudia Frey, Xin Sun, Bess B. Ward, and Karen L. Casciotti
  Biogeosciences, 21, 3215–3238, https://doi.org/10.5194/bg-21-3215-2024, 2024
  Nitrous oxide, a potent greenhouse gas, accumulates in regions of the ocean that are low in dissolved oxygen. We used a novel combination of chemical tracers to determine how nitrous oxide is produced in one of these regions, the eastern tropical North Pacific Ocean. Our experiments showed that the two most important sources of nitrous oxide under low-oxygen conditions are denitrification, an anaerobic process, and a novel “hybrid” process performed by ammonia-oxidizing archaea.
  PubDate: Wed, 17 Jul 2024 18:52:49 +020
  DOI: 10.5194/bg-21-3215-2024 2024
Variable contribution of wastewater treatment plant effluents to
downstream nitrous oxide concentrations and emissions
- Abstract: Variable contribution of wastewater treatment plant effluents to downstream nitrous oxide concentrations and emissions
  Weiyi Tang, Jeff Talbott, Timothy Jones, and Bess B. Ward
  Biogeosciences, 21, 3239–3250, https://doi.org/10.5194/bg-21-3239-2024, 2024
  Wastewater treatment plants (WWTPs) are known to be hotspots of greenhouse gas emissions. However, the impact of WWTPs on the emission of the greenhouse gas N2O in downstream aquatic environments is less constrained. We found spatially and temporally variable but overall higher N2O concentrations and fluxes in waters downstream of WWTPs, pointing to the need for efficient N2O removal in addition to the treatment of nitrogen in WWTPs.
  PubDate: Wed, 17 Jul 2024 18:52:49 +020
  DOI: 10.5194/bg-21-3239-2024 2024
High interspecific variability in ice nucleation activity suggests pollen
ice nucleators are incidental
- Abstract: High interspecific variability in ice nucleation activity suggests pollen ice nucleators are incidental
  Nina L. H. Kinney, Charles A. Hepburn, Matthew I. Gibson, Daniel Ballesteros, and Thomas F. Whale
  Biogeosciences, 21, 3201–3214, https://doi.org/10.5194/bg-21-3201-2024, 2024
  Molecules released from plant pollen induce the formation of ice from supercooled water at temperatures warm enough to suggest an underlying function for this activity. In this study we show that ice nucleators are ubiquitous in pollen. We suggest the molecules responsible fulfil some unrelated biological function and nucleate ice incidentally. The ubiquity of ice-nucleating molecules in pollen and particularly active examples reveal a greater potential for pollen to impact weather and climate.
  PubDate: Fri, 12 Jul 2024 20:11:29 +020
  DOI: 10.5194/bg-21-3201-2024 2024
The emission of CO from tropical rainforest soils
- Abstract: The emission of CO from tropical rainforest soils
  Hella van Asperen, Thorsten Warneke, Alessandro Carioca de Araújo, Bruce Forsberg, Sávio José Filgueiras Ferreira, Thomas Röckmann, Carina van der Veen, Sipko Bulthuis, Leonardo Ramos de Oliveira, Thiago de Lima Xavier, Jailson da Mata, Marta de Oliveira Sá, Paulo Ricardo Teixeira, Julie Andrews de França e Silva, Susan Trumbore, and Justus Notholt
  Biogeosciences, 21, 3183–3199, https://doi.org/10.5194/bg-21-3183-2024, 2024
  Carbon monoxide (CO) is regarded as an important indirect greenhouse gas. Soils can emit and take up CO, but, until now, uncertainty remains as to which process dominates in tropical rainforests. We present the first soil CO flux measurements from a tropical rainforest. Based on our observations, we report that tropical rainforest soils are a net source of CO. In addition, we show that valley streams and inundated areas are likely additional hot spots of CO in the ecosystem.
  PubDate: Wed, 10 Jul 2024 20:11:29 +020
  DOI: 10.5194/bg-21-3183-2024 2024
Reviews and syntheses: A scoping review evaluating the potential
application of ecohydrological models for northern peatland restoration
- Abstract: Reviews and syntheses: A scoping review evaluating the potential application of ecohydrological models for northern peatland restoration
  Mariana P. Silva, Mark G. Healy, and Laurence Gill
  Biogeosciences, 21, 3143–3163, https://doi.org/10.5194/bg-21-3143-2024, 2024
  Peatland restoration combats climate change and protects ecosystem health in many northern regions. This review gathers data about models used on northern peatlands to further envision their application in the specific scenario of restoration. A total of 211 papers were included in the review: location trends for peatland modelling were catalogued, and key themes in model outputs were highlighted. Valuable context is provided for future efforts in modelling the peatland restoration process.
  PubDate: Tue, 09 Jul 2024 20:11:29 +020
  DOI: 10.5194/bg-21-3143-2024 2024

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