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Follow EU policy news on the EGU website

  • EGU news
  • 22 June 2018

A new section on the EGU policy pages summarises recent EU policy news and opportunities that are relevant to geoscientists. It includes recently passed legislation, EU funding opportunities and EU Commission consultations.



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HESS article most cited source on Wikipedia

  • EGU news
  • 9 May 2018

A paper published in the EGU/Copernicus journal Hydrology and Earth System Sciences back in 2007 on global climate zones has been named the most cited source on Wikipedia, referenced more than 2.8 million times.




Highlight articles

Ocean Science

Acoustic mapping of mixed layer depth

The ocean surface mixed layer depth (MLD) is an important parameter within several research disciplines, as variations in the MLD influence air–sea CO2exchange and ocean primary production. A new method is presented in which acoustic mapping of the MLD is done remotely by means of echo sounders. This method allows for observations of high-frequency variability in the MLD, as horizontal and temporal resolutions can be increased by orders of magnitude compared to traditional in situ measurements.


Annales Geophysicae

New high-frequency (7–12 kHz) quasi-periodic VLF emissions observed on the ground at L ∼ 5.5

We reveal previously unknown quasi-periodic (QP) VLF emissions at the unusually high-frequency band of ~ 7–11 kHz by applying the digital filtering of strong sferics to the ground-based VLF data recorded at Kannuslehto station (KAN). In one event, the spectral–temporal forms of the emissions looked like a series of giantbullets, with very abrupt cessation. In the second event, the modulation period was about 3 min under the absence of the simultaneous geomagnetic pulsations.


Biogeosciences

Transfer of diazotroph-derived nitrogen to the planktonic food web across gradients of N2 fixation activity and diversity in the western tropical South Pacific Ocean

Biological dinitrogen (N2) fixation provides the major source of new nitrogen (N) to the open ocean, contributing more than atmospheric deposition and riverine inputs to the N supply. Yet the fate of the diazotroph-derived N (DDN) in the planktonic food web is poorly understood. The main goals of this study were (i) to quantify how much of DDN is released to the dissolved pool during N2 fixation and how much is transferred to bacteria, phytoplankton and zooplankton, and (ii) to compare the DDN release and transfer efficiencies under contrasting N2 fixation activity and diversity in the oligotrophic waters of the western tropical South Pacific Ocean.


Earth System Dynamics

Climate sensitivity estimates – sensitivity to radiative forcing time series and observational data

A key question in climate science is how the global mean surface temperature responds to changes in greenhouse gases. This dependency is quantified by the climate sensitivity, which is determined by the complex feedbacks in the climate system. In this study observations of past climate change are used to estimate this sensitivity. Our estimate is consistent with values for the equilibrium climate sensitivity estimated by complex climate models but sensitive to the use of uncertain input data.


Latest posts from EGU blogs

How can we make hydrogeology free from plagiarism? Reflections five years after a documented case of plagiarism in the hydrologic sciences

How can we make hydrogeology free from plagiarism? Reflections five years after a documented case of plagiarism in the hydrologic sciences

Tom Gleeson and Matt Currell Plagiarism is a clear contradiction of scientific values and practice. Although no universal definition of plagiarism exists, a useful working definition is the wrongful appropriation, stealing and publication of another author’s language, thoughts, ideas, or expressions and the representation of them as one’s own original work (wikipedia). Plagiarism in our digital world can be too easy – although journals have stepped up on electronically detecting and policing plagiarism (Nature, 2010), there is evidence that plagiarism …


Magma oceans

Magma oceans

The Geodynamics 101 series serves to showcase the diversity of research topics and methods in the geodynamics community in an understandable manner. We welcome all researchers – PhD students to professors – to introduce their area of expertise in a lighthearted, entertaining manner and touch upon some of the outstanding questions and problems related to their fields. For our latest ‘Geodynamics 101’ post we will talk about magma oceans! When you think about the Earth a long, long time ago, …


Image of the Week -- Quantifying Antartica’s ice loss

Image of the Week -- Quantifying Antartica’s ice loss

It is this time of the year, where any news outlet is full of tips on how to lose weight rapidly to become beach-body ready. According to the media avalanche following the publication of the ice sheet mass balance inter-comparison exercise (IMBIE) team’s Nature paper, Antarctica is the biggest loser out there. In this Image of the Week, we explain how the international team managed to weight Antarctica’s ice sheet and what they found. Estimating the Antarctic ice sheet’s mass …