European project to support rooftop greenhouses projects

The Institute of Environmental Science and Technology from the Universitat Autònoma de Barcelona (ICTA-UAB) is launching an open call to support rooftop greenhouse projects, in the framework of GROOF Project.

El ICTA-UAB participa en el proyecto que habilitará 10 escuelas de Barcelona como refugios climáticos

El Instituto de Ciencia y Tecnología Ambientales de la Universidad Autónoma de Barcelona (ICTA-UAB) es una de las instituciones impulsoras de un proyecto que habilitará 10 escuelas de Barcelona como refugios climáticos para disminuir el impacto de las altas temperaturas del verano.

A warmer ocean will lead to 17% reduction in global marine animal biomass, by the end of the century

Climate change will affect the distribution and abundance of marine life, but the full extent of these changes under future warming has been difficult to predict due to the limitations of individual ecosystem models used for such forecasts.

New study dismisses green growth policies as a route out of ecological emergency

Researchers from ICTA-UAB and the Goldsmiths University of London suggest that emissions reduction is only compatible with a lower economical degrowth or a degrowth scenario.

New cross-boundary approach for addressing wicked weed problems

Weed species continue to spread and management costs continue to mount, in spite of best management practices and efforts by research and extension personnel who promote them to land managers.

Urban green spaces do not benefit the health of all

In general, the creation of parks and green spaces in urban centers has positive effects on the health of city residents.

ERASMUS+ Edu-BioMed News: ICTA-UAB organizes workshops in Jabal Moussa and Shouf Biosphere Reserves (Lebanon) addressed to university...

From next April, 29th to May, 2nd, about 40 professors and professionals from the higher education institutions from Lebanon, Morocco, Spain, France and Italy will meet in two Lebanese Biosphere Reserves (Jabal Moussa and Shouf) to discuss how to improve Moroccan and Lebanese higher education and academic research in the context of Mediterranean Biosphere Reserves (BRs).

ICTA-UAB researcher Antoni Rosell-Melé receives an ERC Advanced Grant

ICTA-UAB researcher Antoni Rosell-Melé has been awarded an Advanced Grant (AdvGr) from the European Research Council (ERC) to develop the project "New geochemical approach to reconstruct tropical palaeo-atmospheric dynamics" (PALADYN).

Urban Agriculture on Rooftops Provides Healthy, Fresh and Sustainable Food

​The implementation of urban gardens on building rooftops could produce fresh, healthy and sustainable agricultural food and guarantee the food sovereignty of cities, which are becoming increasingly populated.

Se prevén niveles de polen muy altos para esta primavera

Las polinizaciones de esta primavera y verano comenzarán en el momento habitual pero serán muy importantes.

Indigenous knowledge, key to a successful ecosystem restoration

Ecological restoration projects actively involving indigenous peoples and local communities are more successful. This is the result of a study carried out by the Institute of Environmental Science and Technology at the Universitat Autònoma de Barcelona (ICTA-UAB).

Future changes in human well-being more likely to depend on Social Factors than Economic Factors

The changes in the perception of personal well-being that could take place in the next three decades, on a global level, depend much more on social factors than on economic ones.

Record-wet and record-dry months increased in regions worldwide: climate change drives rainfall extremes

More and more rainfall extremes are observed in regions around the globe – triggering both wet and dry records, according a new study involving ICTA-UAB researcher Finn Mempel.

Success at ICTA-UAB: Six ERC Grants In Three Years

The Institute of Environmental Science and Technology of the Universitat Autònoma de Barcelona (ICTA-UAB) has been awarded six European Research Council (ERC) grants in three years, from the end of 2015 to the end of 2018. Each project (of between 1.5 and 2 million euros) lasts for five years and allows the recruitment of a team of six or seven doctoral students and postdocs.

New ICTA-UAB 'Welcome Guide'

The new ICTA-UAB 'Welcome Guide' it is at your disposal now. With this document, we aim to help you discover the basics of the PhD programme, ICTA-UAB’s structure, etc.
News
Record-wet and record-dry months increased in regions worldwide: climate change drives rainfall extremes

Date: 2019-01-16

 

More and more rainfall extremes are observed in regions around the globe – triggering both wet and dry records, according a new study involving ICTA-UAB researcher Finn Mempel. Yet there are big differences between regions: The central and Eastern US, northern Europe and northern Asia have experienced heavy rainfall events that have led to severe floods in recent past. In contrast, most African regions have seen an increased frequency of months with a lack of rain. The study is the first to systematically analyze and quantify changes in record-breaking monthly rainfall events from all over the globe, based on data from roughly 50,000 weather stations worldwide. Climate change from fossil fuel greenhouse gases has long been expected to disturb rainfall patterns.

They took a close look at observed monthly rainfall data - if it's not just a few days but several weeks that are record wet, this can accumulate over time and lead to large river floods, or to droughts if it is record dry,“ says lead author Jascha Lehman from the Potsdam Institute for Climate Impact Research (PIK). The impacts on people's livelihoods in the affected regions can be huge, ranging from flooded houses to endangered food security due to large-scale agricultural losses.

Downpour in parts of US, Europe, Russia – drought in parts of Africa
The US has so far seen an increase of record wet months by more than 25 percent in the Eastern and central parts over the period 1980-2013. Argentina and bordering countries have experienced an increase of 32 percent. In central and northern Europe the increase is between 19 and 37 percent. In the Asian part of Russia the increase is around 20 percent, while South East Asia shows an increase of about 10 percent.

The scientists ran strict tests for the statistical significance of observed changes. Therefore, they so far see significant changes in dry extremes just in Africa south of the Sahara and in the Sahel zone where dry records have increased by up to 50 percent. „This implies that approximately one out of three record-dry months in this regions would not have occurred without long-term climate change,“ says co-author Dim Coumou from the Institute for Environmental Studies (IVM) at Vrije Universiteit  Amsterdam. „A central conclusion from our study is that, generally, land regions in the tropics and sub-tropics have seen more dry records, and the northern mid- to high-latitudes more wet records – this largely fits the patterns that scientists expect from human-caused climate change.”

The scientists compared observed wet and dry rainfall extremes to the number of extremes that would be expected in a climate without long-term changes. "We checked for new records – monthly rainfall values that have never been observed before in a given region since the beginning of systematic measurements more than a hundred years ago“. Of course one expects to see some rainfall records simply due to natural variability. Normally, record weather events occur by chance and we know how many would happen in a climate without warming“ explains Jascha Lehmann. "It's like throwing a dice: on average, one out of six times you get a six. But by injecting huge amounts of greenhouse gases into the atmosphere, humankind has loaded the dice. In many regions, we throw sixes much more often with severe impacts for society and the environment".

"It is worrying that we see significant increases of such extremes already at just one degree global warming“, adds Lehmann. Right now, governments from countries all over the world meet at the UN climate summit – if they do not agree on solutions to limit warming to well below 2 degrees, we're headed for 3-4 degrees within this century. Physics tells us that this would boost rainfall extremes even further.”

Article:
Lehmann, J., Mempel, F., & Coumou, D. (2018): Increased occurrence of record-wet and record-dry months reflect changes in mean rainfall. Geophysical Research Letters, 45.

Weblink to the article, once it is published: https://doi.org/10.1029/2018GL079439 

ICTA's Activities