Here we present the results from an intercomparison of multiple global gridded crop models (GGCMs) within the framework of the Agricultural Model Intercomparison and Improvement Project and the Inter-Sectoral Impacts Model Intercomparison Project. Results indicate strong negative effects of climate change, especially at higher levels of warming and at low latitudes; models that include explicit nitrogen stress project more severe impacts. Across seven GGCMs, five global climate models, and four representative concentration pathways, model agreement on direction of yield changes is found in many major agricultural regions at both low and high latitudes; however, reducing uncertainty in sign of response in mid-latitude regions remains a challenge. Uncertainties related to the representation of carbon dioxide, nitrogen, and high temperature effects demonstrated here show that further research is urgently needed to better understand effects of climate change on agricultural production and to devise targeted adaptation strategies.

/pdf/assessing-agricultural-risks-of-climate-change-in-the-21st-4f6wucb9x8.pdf

Assessing agricultural risks of climate change in the 21st century in a global gridded crop model intercomparison

Soil erosion is a geomorphological and, at the same time, a land degradation process that may cause environmental and property damage, loss of livelihoods and services as well as social and economic disruption. Erosion not only lowers soil quality on-site, but causes also significant sediment-related problems off-site. Given the large number of research papers on this topic, one might therefore conclude that we know now almost everything about soil erosion and its control so that little new knowledge can be added. This conclusion can be refuted by pointing to some major research gaps. There is a need for more research attention to 1) improved understanding of both natural and anthropogenic soil erosion processes and their interactions, 2) scaling up soil erosion processes and rates in space and time, and 3) innovative techniques and strategies to prevent soil erosion or reduce erosion rates. This is illustrated with various case studies from around the world. If future research addresses these research gaps, we will 1) better understand processes and their interactions operating at a range of spatial and temporal scales, predict their rates as well as their on-site and off-site impacts, which is academically spoken rewarding but also crucial for better targeting erosion control measures, and 2) we will be in a better position to select the most appropriate and effective soil erosion control techniques and strategies which are highly necessary for a sustainable use of soils in the Anthropocene.

Soil erosion in the Anthropocene: Research needs

Impacts of climate change on water erosion: A review

https://biblio.ugent.be/publication/8500204/file/8500205.pdf

Comprehensive assessment of soil erosion risk for better land use planning in river basins : case study of the Upper Blue Nile River

A century of gully erosion research: Urgency, complexity and study approaches

http://meetingorganizer.copernicus.org/EGU2015/EGU2015-9516.pdf

How fast do gully headcuts retreat

Late holocene cryogenic deformations in floodplain sediments of river valleys in the selenga river basin

Stages of sedimentation, soil formation and high water content of rivers according to the study and dating of floodplains and terraces deposits in the selenga river basin

Yuri V. Ryzhov

Papers

How fast do gully headcuts retreat

Late holocene cryogenic deformations in floodplain sediments of river valleys in the selenga river basin

Stages of sedimentation, soil formation and high water content of rivers according to the study and dating of floodplains and terraces deposits in the selenga river basin