Climate: Past, Present & Future

Desert loess: formation, distribution, geoscientific value

Kamila Ryzner, Janina Nett and Christian Zeeden September 25, 2020

Image of desert loess from Tunisia, provided by Sascha Meszner, Maximilian Pachtmann and Georg Mettig (Institute for Geography, TU Dresden; Germany).

Loess is an aeolian (wind-driven) silty sediment covering over 10% of the Earth’s land surface; it occurs predominantly in the mid-latitudes. On a global scale, loess is among the most widespread unconsolidated sediments, and of crucial importance for agricultural regions where loess deposits are known to form fertile soils because of its ability to store water and retain nutrients. Loess is compr ...[Read More]

Climate models and Bach’s unfinished fugue

Faranak Tootoonchi September 10, 2020

Illustration by: Roshanak Tootoonchi, M.Sc. Student in hydrology and water resources management, University of Tabriz, Iran.

Johann Sebastian Bach’s last work – Contrapunctus XIV – is an unfinished musical composition. For many years, scholars considered that this piece was left unfinished because of Bach’s deteriorating health in his final years and eventual death. However, researchers recently found evidence that Bach might have left this piece intentionally unfinished, as he thought that there was still room for impr ...[Read More]

Breathing life into a d(r)ying lake in northwest Iran

P. Saemian ^a, O. Elmi ^a, B.D. Vishwakarma ^b, M.J. Tourian ^a, N. Sneeuw ^a
^aUniversity of Stuttgart, Institute of Geodesy (GIS), Germany
^bBristol Glaciology Center, School of Geographical Sciences, University of Bristol, UK
August 6, 2020

Figure 1: (a) A ship about forty meters long lies stuck on a salty sandbank right in the center of Lake Urmia (photographed by Sebastian Castelier). (b) The same ship this time floats on the water after nearly 20 years.

Lake Urmia, in Northwest Iran, was once the most extensive and permanent hypersaline lake (salinity >> of ocean) in the world. Since 1995, the lake water level has dropped about 8 m, shrinking to less than 30% of its original surface area and losing more than 90% of its water volume over two decades [1]. Unsustainable water management in response to increasing demand together with climatic e ...[Read More]

Hurricane COVID-19: What can COVID-19 tell us about tackling climate change?

Gaby S. Langendijk¹ and Marisol Osman ²
1. Climate Service Center Germany (GERICS), Helmholtz-Zentrum Geesthacht, Hamburg, Germany.
2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Centro de Investigaciones del Mar y la Atmósfera (CIMA), UMI-IFAECI (CNRS), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.
April 16, 2020

Image has been compiled by authors. Hurricane Image Credit: NASA Goddard Rapid Response Team. COVID-19 Virus Image Credit: Pixabay royalty free images.

Note by the editors: In the unique period our world is currently facing, we have decided to open our blog to hear the voices of our young climate scientists from around the globe. This is an opinion piece provided by two early career climatologists from Argentina and the Netherlands. I just arrived at home with a bunch of groceries from the supermarket after encountering some very empty shelves. I ...[Read More]