Listen
2 Ergebnisse
Suchergebnisse
Veröffentlichung Selected Trade-Offs and risks associated with land use transitions in central Germany(2019) Priess, Jörg A.; Hoyer, Christian; Jäckel, Greta; Schweitzer, ChristianFuture uncertainties and risks for socio-environmental systems are often addressed in the form of scenarios. This study aims to identify the biggest future risks and uncertainties for the study region Central Germany and the question which land use changes and impacts on selected ecosystem services related to agricultural production can be expected in the coming decades. For this purpose, we co-developed scenario storylines along the largest uncertainties, how the region may change with different stakeholders and used environmental models to simulate land-use changes and impacts on selected ecosystem services related to agricultural production. The study revealed that Climate change may have beneficial (e.g. maize, sugar beet) or adverse effects (e.g. barley, wheat) on crop yield levels, depending on crop type and level of climate change. In the scenarios crop production is additionally influenced by different levels of regional preferences influencing crop land extent (e.g., afforestation), crop management (e.g., organic production), and crop types used for food or bioenergy production. As driving factors such as climate change, land availability, and land management all influence agriculture, integrated studies like this are needed to assess future crop production. However, sustainability objectives may prefer other than the most productive agricultural pathways providing additional benefits such as regulating or cultural services. © Springer International Publishing AG, part of Springer Nature 2019Veröffentlichung On the use of Earth Observation to support estimates of national greenhouse gas emissions and sinks for the Global stocktake process: lessons learned from ESA-CCI RECCAP2(2022) Bastos, Ana; Ciais, Philippe; Sitch, Stephen; Günther, DirkThe Global Stocktake (GST), implemented by the Paris Agreement, requires rapid developments in the capabilities to quantify annual greenhouse gas (GHG) emissions and removals consistently from the global to the national scale and improvements to national GHG inventories. In particular, new capabilities are needed for accurate attribution of sources and sinks and their trends to natural and anthropogenic processes. On the one hand, this is still a major challenge as national GHG inventories follow globally harmonized methodologies based on the guidelines established by the Intergovernmental Panel on Climate Change, but these can be implemented differently for individual countries. Moreover, in many countries the capability to systematically produce detailed and annually updated GHG inventories is still lacking. On the other hand, spatially-explicit datasets quantifying sources and sinks of carbon dioxide, methane and nitrous oxide emissions from Earth Observations (EO) are still limited by many sources of uncertainty. While national GHG inventories follow diverse methodologies depending on the availability of activity data in the different countries, the proposed comparison with EO-based estimates can help improve our understanding of the comparability of the estimates published by the different countries. Indeed, EO networks and satellite platforms have seen a massive expansion in the past decade, now covering a wide range of essential climate variables and offering high potential to improve the quantification of global and regional GHG budgets and advance process understanding. Yet, there is no EO data that quantifies greenhouse gas fluxes directly, rather there are observations of variables or proxies that can be transformed into fluxes using models. Here, we report results and lessons from the ESA-CCI RECCAP2 project, whose goal was to engage with National Inventory Agencies to improve understanding about the methods used by each community to estimate sources and sinks of GHGs and to evaluate the potential for satellite and in-situ EO to improve national GHG estimates. Based on this dialogue and recent studies, we discuss the potential of EO approaches to provide estimates of GHG budgets that can be compared with those of national GHG inventories. We outline a roadmap for implementation of an EO carbon-monitoring program that can contribute to the Paris Agreement. © 2023 BioMed Central