scholarly journals Soil carbon research and global environmental challenges

Author(s):  
Alfred E Hartemink ◽  
Rattan Lal ◽  
Martin H. Gerzabek ◽  
Bashir Jama ◽  
Alex McBratney ◽  
...  

The role of soil organic carbon (SOC) in maintaining soil conditions and its resulting services is well established. Currently, over 1,000 articles per year are being published in peer-reviewed journals, and increasing at about 10% per year. It was not until the 1980s when the relation between soils and climate change was noted, and it was realized that soils play a key role as a sink and source of greenhouse gases (GHGs) ( Bouwman 1990, Scharpenseel, Ayoub and Schomaker 1990, Jenny 1980). A large number of research projects have been initiated globally in which soil C is a key component, and there have been some excellent reviews ( Lal 2004, Stockmann et al. 2013, Melillo et al. 2011). Yet, there is a lack of focus in soil C research in relation to current environmental challenges. Here we recommend research priorities to advance the knowledge base and use of soil C in relation to global human and environmental challenges: food and fiber production, water scarcity and purification, energy production, climate change, biodiversity, recycling waste, and environmental degradation. We have listed the priorities under three themes: (i) Soil C in space and time, (ii) Soil C properties and processes, and (ii) Soil C depletion and management.

2014 ◽  
Author(s):  
Alfred E Hartemink ◽  
Rattan Lal ◽  
Martin H. Gerzabek ◽  
Bashir Jama ◽  
Alex McBratney ◽  
...  

The role of soil organic carbon (SOC) in maintaining soil conditions and its resulting services is well established. Currently, over 1,000 articles per year are being published in peer-reviewed journals, and increasing at about 10% per year. It was not until the 1980s when the relation between soils and climate change was noted, and it was realized that soils play a key role as a sink and source of greenhouse gases (GHGs) ( Bouwman 1990, Scharpenseel, Ayoub and Schomaker 1990, Jenny 1980). A large number of research projects have been initiated globally in which soil C is a key component, and there have been some excellent reviews ( Lal 2004, Stockmann et al. 2013, Melillo et al. 2011). Yet, there is a lack of focus in soil C research in relation to current environmental challenges. Here we recommend research priorities to advance the knowledge base and use of soil C in relation to global human and environmental challenges: food and fiber production, water scarcity and purification, energy production, climate change, biodiversity, recycling waste, and environmental degradation. We have listed the priorities under three themes: (i) Soil C in space and time, (ii) Soil C properties and processes, and (ii) Soil C depletion and management.


2021 ◽  
Author(s):  
Carl-Fredrik Johannesson ◽  
Klaus Steenberg Larsen ◽  
Brunon Malicki ◽  
Jenni Nordén

<p>Boreal forests are among the most carbon (C) rich forest types in the world and store up to 80% of its total C in the soil. Forest soil C development under climate change has received increased scientific attention yet large uncertainties remain, not least in terms of magnitude and direction of soil C responses. As with climate change, large uncertainties remain in terms of the effects of forest management on soil C sequestration and storage. Nonetheless, it is clear that forest management measures can have far reaching effects on ecosystem functioning and soil conditions. For example, clear cutting is a widely undertaken felling method in Scandinavia which profoundly affects the forest ecosystem and its functioning, including the soil. Nitrogen (N) fertilization is another common practice in Scandinavia which, despite uncertainties regarding effects on soil C dynamics, is being promoted as a climate change mitigation tool. A more novel practice of biochar addition to soils has been shown to have positive effects on soil conditions, including soil C storage, but studies on biochar in the context of forests are few.</p><p>In the face of climate change, the ForBioFunCtioN project is dedicated to investigating the response of boreal forest soil CO<sub>2</sub> and CH<sub>4</sub> fluxes to experimentally increased temperatures and increased precipitation – climatic changes in line with projections over Norway – within a forest management context. The experiment is set in a Norwegian spruce-dominated bilberry chronosequence, including a clear-cut site, a middle-aged thinned stand, a mature stand and an old unmanaged stand. Warming, simulated increased precipitation, N fertilizer and biochar additions will be applied on experimental plots in an additive manner that allows for disentangling the effects of individual parameters from interaction effects. Flux measurements will be undertaken at high temporal resolution using the state-of-the-art LI-7810 Trace Gas Analyzer (©LI-COR Biosciences). The presentation will show the experimental setup and first measurements from the large-scale experiment.</p>


2021 ◽  
Author(s):  
Jorge Sebastian Moraga ◽  
Nadav Peleg ◽  
Simone Fatichi ◽  
Peter Molnar ◽  
Paolo Burlando

<p>Hydrological processes in mountainous catchments will be subject to climate change on all scales, and their response is expected to vary considerably in space. Typical hydrological studies, which use coarse climate data inputs obtained from General Circulation Models (GCM) and Regional Climate Models (RCM), focus mostly on statistics at the outlet of the catchments, overlooking the effects within the catchments. Furthermore, the role of uncertainty, especially originated from natural climate variability, is rarely analyzed. In this work, we quantified the impacts of climate change on hydrological components and determined the sources of uncertainties in the projections for two mostly natural Swiss alpine catchments: Kleine Emme and Thur. Using a two-dimensional weather generator, AWE-GEN-2d, and based on nine different GCM-RCM model chains, we generated high-resolution (2 km, 1 hour) ensembles of gridded climate inputs until the end of the 21<sup>st</sup> century. The simulated variables were subsequently used as inputs into the fully distributed hydrological model Topkapi-ETH to estimate the changes in hydrological statistics at 100-m and hourly resolutions. Increased temperatures (by 4°C, on average) and changes in precipitation (decrease over high elevations by up to 10%, and increase at the lower elevation by up to 15%) results in increased evapotranspiration rates in the order of 10%, up to a 50% snowmelt, and drier soil conditions. These changes translate into important shifts in streamflow seasonality at the outlet of the catchments, with a significant increase during the winter months (up to 40%) and a reduction during the summer (up to 30%). Analysis at the sub-catchment scale reveals elevation-dependent hydrological responses: mean annual streamflow, as well as high and low flow extremes, are projected to decrease in the uppermost sub-catchments and increase in the lower ones. Furthermore, we computed the uncertainty of the estimations and compared them to the magnitude of the change signal. Although the signal-to-noise-ratio of extreme streamflow for most sub-catchments is low (below 0.5) there is a clear elevation dependency. In every case, internal climate variability (as opposed to climate model uncertainty) explains most of the uncertainty, averaging 85% for maximum and minimum flows, and 60% for mean flows. The results highlight the importance of modelling the distributed impacts of climate change on mountainous catchments, and of taking into account the role of internal climate variability in hydrological projections.</p>


2021 ◽  
Author(s):  
Juan Carlos Salazar

As part of the Poznan Strategic Programme on Technology Transfer, which the Global Environmental Facility funded a regional project, implemented by the IDB. One of the components of this project was executed by Mexicos National Climate Change and Ecology Institute. It carried out two very relevant studies, one on recommendations to integrate climate change technologies into the national innovation systems, and the other on planning tools for climate change. The topics addressed on this document are i) The role of Environmentally Sound Technologies & National Innovation Systems (NIS) in the fight against Climate Change. ii) Greening NIS in LAC: Challenges and Opportunities. iii) Recommendations for the integration of ESTs into NIS.


2005 ◽  
Vol 5 (3) ◽  
pp. 48-69 ◽  
Author(s):  
Marc Williams

Marian Miller provided an engaging and persuasive analysis of the role of Third World states in global environmental negotiations. While Miller focused on the strategies of individual states, this article examines the collective agency of the Third World in global environmental negotiations. The first part of the article explores the debates on the continuing relevance of the Third World as a concept, and contends that the Third World retains relevance in the context of global bargaining processes. The second part of the article highlights the role of ideas and institutions in the continued reproduction of the Third World as an actor in global environmental politics. The final part of the article explores the ways in which the negotiations on climate change have tended to reproduce a distinctive Southern perspective.


2021 ◽  
Vol 2 (1) ◽  
pp. 5-11
Author(s):  
Dolly Priatna ◽  
Kathryn A. Monk

With this issue, the Indonesia Journal of Applied Environmental Studies (InJAST) enters its second year, having been first published in April 2020 just as the Covid-19 pandemic was spreading globally. In the first two issues, InJAST published 13 articles, which were the results of research and ideas from academia, researchers from the Indonesian Institute of Sciences (LIPI) and members of conservation NGOs. Within its first year, the InJAST website has been visited by around 1,500 visitors from 50+ countries.  Although the majority were from Indonesia, 30% were from across Europe, Asia, the Americas, and Africa, and included the USA, UK, Australia, and India.One of InJAST's missions is to provide a vehicle for academia (students and lecturers), members of environmental NGOs, and young researchers, particularly from Indonesia, who are just starting to publish their ideas, literature reviews and research findings or articles in scientific journals. InJAST was also developed to accommodate scientific papers related to broader environmental topics, but as yet, most articles have focused on plant/wildlife ecology, nature conservation, and forest restoration (61%). Others were the result of the studies on environmental education (8%) and on the UN Sustainable Development Goals (SDGs) and other environmental issues (31%).As we start the third decade of the 21st century, the environmental challenges we face are ever more complex and demanding. The UN’s global action plan for the next 10 years set out in the "UN's 2030 Agenda for Sustainable Development", puts forward special measures to achieve a world that is fairer, more prosperous, and more respectful of the environment. The main global environmental challenges that, according to the UN, must be resolved in this decade, are climate change mitigation and adaptation, pollution problems and their effects on health, protecting oceans, the energy transitions and renewables, a sustainable food model, protecting biodiversity, sustainable urban development and mobility, hydric stress and water scarcity, extreme meteorological phenomena, and overpopulation and waste management. As academics, environmental researchers, and members of environmental NGOs, we can and should support the UN agenda by seeking the solutions to these major global environmental problems that affect all of us. We do this by carrying out relevant research and, just as importantly, publishing them in scientific journals so that we can disseminate our findings as widely as possible and suggested interventions can be trialed and then implemented on the ground.This new issue of InJAST contains several papers focusing on plant ecology, endangered species conservation, and forest restoration, all of which are closely related to one of the main global problems identified by the UN, namely protecting biodiversity. Another paper analyses determinants and typology of hydrometeorological disasters that may relate to the problem of extreme meteorological phenomena. Strong pro-environmental legislation and government regulations are very important in implementing existing environmental policies, and environmental awareness and responsibility are also important to assess whether people are willing to participate in addressing global environmental problems at the local level. This is explored in two other papers in this issue of InJAST.We reflect further that we are in a hugely different place from where we were at the start of 2020. The Covid pandemic, obviously a global tragedy, has changed many people’s behavioral patterns and our subsequent impact of nature and the environment. It seems to have in many ways heightened people's awareness of nature and environmental issues, and the relationships between unsustainable production and consumption and the nature and climate change crises. A plethora of new research is emerging on these interdisciplinary questions and we look forward to submissions tackling these questions in future editions of InJAST.Finally, as Editors-in-Chief, we have been working hard to improve and expand our peer review community, as well as the processes of online submission, reviewing and publishing.  We are delighted to be presenting Volume 2 No 1 of InJAST and we encourage our colleagues from all sectors to submit their papers for the next issue.


2018 ◽  
Vol 9 (4) ◽  
pp. 633-642 ◽  
Author(s):  
G. Montanaro ◽  
V. Nuzzo ◽  
C. Xiloyannis ◽  
B. Dichio

Abstract Agriculture might serve as a mitigation solution through carbon (C) sequestration in soil, in tree biomass and reducing greenhouse gas (GHG) emissions. Increased C is beneficial for some soil structures and functions, improving the use of water and in turn the crop adaptation. This study reports on the synergy between mitigation and adaptation in agriculture through the paradigm of the olive (Olea europaea). Through data on net ecosystem productivity and soil respiration, the role of olive groves to store C in tree biomass (from 0.36 to 2.78 t CO2 ha−1 yr−1) and into soil (∼8.5 t CO2 ha−1 yr−1) is reviewed. The influence of some management practices on that role is also discussed. The overall climatic impact of olive fruit and oil production has been evaluated also considering GHG emissions by field operations (e.g., pruning, mulching of cover crop, fertilization, harvest, etc.) and by the extraction and bottling of oil. Soil C as interface between climate change mitigation and adaptation has been delineated, linking C-induced improvements in soil properties to increased water storage and reduced run-off and erosion. The outcomes may strengthen the environmental role of agriculture and promote synergistic mitigation and adaptation policies assisting in soil and water resources conservation.


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