News

Kuehe auf einer Almwiese in den bayerischen Alpen

How more sophisticated leaf biomass simulations can increase the realism of modelled animal populations

Team members Jens Krause, Almut Arneth and Peter Anthoni published an article in Ecological Modelling (https://doi.org/10.1016/j.ecolmodel.2022.110061). We investigated the impacts of a complex, process-based DGVM on simulated animal populations. 

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Kick-off-Event des neuen Netzwerks leitender Wissenschaftlerinnen

Kick-off meeting of the KIT Womens Professors Forum in Karlsruhe

On 30. June the kick-off meeting of the KIT Womens Professors Forum took place in Karlsruhe.

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Moorgebiet in Oberbayern mit Moorkiefern und kleinem See, Deutschland

IPCC publishes the 6th Assessment Report of its WG2

The report repeats the warnings the scientific community has been expressing for years. Global warming, reaching 1.5°C in the near-term, is expected to cause unavoidable increases in multiple climate hazards and present multiple risks to both ecosystems and humans.

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Static chamber for greenhouse gas source strength determination, in-situ greenhouse gas measurements, biological nitrogen fixation, legume intercropping, grassland

Modeling symbiotic biological nitrogen fixation in grain legumes globally with LPJ-GUESS

Biological nitrogen fixation (BNF) from grain legumes is of significant importance in global agricultural ecosystems. Crops with BNF capability are expected to support the need to increase food production while reducing nitrogen (N) fertilizer input for agricultural sustainability, but quantification of N fixing rates and BNF crop yields remains inadequate on a global scale.

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Prof. Almut Arneth

Almut is one of the Gottfried Wilhelm-Leibniz Price winners 2022

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KIT-Campus Alpin, Garmisch-Partenkirchen

Almut in an Interview with the Economy Ministry of Baden-Württemberg

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WPF Logo

KIT Women Professors Forum launched

On October the KIT Women Professors Forum was launched by its current members.

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Almwiese

Restoring degraded land will generate co-benefits for climate change mitigation and adaptation and more broadly for human and societal well-being and the economy

Almut led an invited review paper to ARER that summarises the multiple challenges of land degradation and highlights the many co-benefits arising from restoring degraded lands.

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Landwirtschaftlich genutzte Fläche

IPCC/IPBES workshop launched

Biodiversity loss and climate change are both driven by human economic activities and mutually reinforce each other. Neither will be successfully resolved unless both are tackled together.

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Figure Total C Storage

Diverging land-use projections cause large variability in their impacts on ecosystems

Team members Anita Bayer, Almut Arneth and Peter Anthoni published a study in Earth System Dynamics demonstrating the large variability in ecosystem service indicators caused by diverging future land-use scenarios.

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KIT7IMK-IFU, Garmisch-Partenkirchen, Germany

Almut Arneth im Interview zum Henriette Herz-Scouting-Programm

Prof. Almut Arneth berichtet davon, wie sie als Humboldt-Scout bei der Talentsuche vorgeht.

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Autobahn

This year's carbon budget published

The annual update on the global carbon budget, which is led by the Global Carbon Project is published. Our team contributes to these regular updates with LPJ-GUESS simulations.

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Amboseli National Park, Kenya: Due to climate change, glaciers on the Kilimanjaro are retreating. Plants and animals in the valleys below, however, are dependent on water from the glacier.

Post-2020 biodiversity targets need to embrace climate change

A considerable number of existing and proposed post-2020 biodiversity targets by international organizations are at risk of being severely compromised due to climate change, even if other barriers such as habitat exploitation are removed argue the authors of a study led by Almut Arneth. According to their analysis published in PNAS, global warming accelerates the loss of biodiversity. Vice versa, measures to protect biodiversity may also mitigate the impacts of climate change. The authors suggest that flexible approaches to conservation would allow dynamic responses to the effects of climate change on habitats and species.

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Agriculturally used area

Published: A comprehensive quantification of global nitrous oxide sources and sinks

Nitrous oxide (N₂O), like carbon dioxide, is a long-lived greenhouse gas that accumulates in the atmosphere. Over the past 150 years, increasing atmospheric N₂O concentrations have contributed to stratospheric ozone depletion and climate change, with the current rate of increase estimated at 2 per cent per decade.

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Auenwald - Riverside Forest

Vegetation biomass change in China in the 20th century: an assessment based on a combination of multi-model simulations and field observations

Simulations with LPJ-GUESS done within the FireMIP project contributed to this study in ERL, which investigated the impact of land use change and climate change on vegetation biomass in China.

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Corn Field

Almut Arneth participated in the GIZ Web Talk "Biodiversity Matters: Die biologische Vielfalt bewahren – unsere Zukunft sichern"

Almut Arneth participated in the GIZ Web Talk "Biodiversity Matters: Die biologische Vielfalt bewahren – unsere Zukunft sichern". Her input to the discussion can be found here (in German and English)

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Forest disturbance play important role for land carbon sinks and climate.

We contributed to an international study, led by our former team member Tom Pugh, published in Nature Climate Change which demonstrates the large importance of accounting for frequency and extend of disturbance for carbon cycling in forest ecosystems. The work highlights how even small changes in disturbance interval, for instance through climate change or human forest management, would impact today’s forest carbon sink.

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The world’s biggest terrestrial carbon sinks are found in young forests.

More than half of the carbon sink in the world’s forests is in areas where the trees are relatively young – under 140 years old – rather than in tropical rainforests, an international team of researchers including Almut Arneth shows. These trees have typically ‘regrown’ on land previously used for agriculture, or cleared by fire or harvest and it is their young age that is one of the main drivers of this carbon uptake. Previously it had been thought that the carbon uptake by forests was overwhelmingly due to fertilisation of tree growth by increasing levels of carbon dioxide in the atmosphere. However, the analysis published in PNAS (www.pnas.org/cgi/doi/10.1073/pnas.1810512116) demonstrates that areas where forests are re-growing take up large amounts of carbon not only due to these fertilisation effects, but also as a result of their younger age.

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agricultural land, forest

This year’s Carbon Budget published

The annual update on the global carbon budget, which is led by the Global Carbon Project is published. Our team contributes to these regular updates with LPJ-GUESS simulations.

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Bee drinks at blossom

Biodiversity loss worldwide – we cannot continue with a ‘business-as-usual’

An article published in Science (http://dx.doi.org/10.1126/science.aax3100) by authors of the Global Assessment of the IBPES (https://ipbes.net/news/global-assessment-summary-policymakers-final-version-now-available) warns of the continued over-exploitation of the earth’s resources which are vital for human societies. Evidence across scientific disciplines that was brought together for the report demonstrated unequivocally, that—like climate change—the loss of biodiversity on land, in freshwater and oceans impedes severely our possibilities towards achieving many Sustainable Development Goals. The declining trend in many indicators related to the integrity of natural ecosystems can be turned around through a number of integrated actions that include innovative governance approaches, as well as informed individual decision making.

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Prof. Almut Arneth

Almut Arneth received a Distinguished Visiting International Fellowship under the Western Sydney University Vice Chancellor’s Research Fellowship Programme

She will be visiting the Hawkesbury Institute for the Environment at WSU in spring 2019 and 2020 to initial sustained cooperation and joint research activities with Australian colleagues on topics related to the role of terrestrial ecosystems and their management under land-use change and climate change.

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Cabbage

Global diets can harm or protect biodiversity

A team of researchers including some of our team’s members has published a study titled “The role of global dietary transitions for safeguarding biodiversity” in Global Environmental Change (https://doi.org/10.1016/j.gloenvcha.2019.101956). The study emphasises that diets low in animal products reduce agricultural expansion and reduce agricultural intensity in biodiverse regions.

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Squirrel

ESKP Topical Issue on Biodiversity online (in German)

Biodiversität im Meer und an Land

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Land use

Land and land management is critical to keep global warming to well below 2ºC

The IPCC approved and accepted Climate Change and Land: an IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems at its 50th Session held on 2 – 7 August 2019 in Geneva. The approved Summary for Policymakers (SPM) was presented at a press conference on 8 August 2019. Almut Arneth was Coordinating Lead author of chapter 1 in the report and participated in the IPCC plenary session.

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