GeoLog

Space and Planetary Sciences

July GeoRoundUp: the best of the Earth sciences from around the web

July GeoRoundUp: the best of the Earth sciences from around the web

Drawing inspiration from popular stories on our social media channels, major geoscience headlines, as well as unique and quirky research, this monthly column aims to bring you the latest Earth and planetary science news from around the web.

Major story

The world soaks up the sun

This summer our planet experienced the hottest June in recorded history, with the average global temperature reaching 16.4 °C, and July is on track to becoming the hottest month ever measured on Earth. And if you either live in or have been visiting Europe over the last few weeks, it sure feels like record-breaking heat.

In both June and July, several regions in Europe reached all-time temperature highs as warm air from northern Africa made its way through the continent. A rapid analysis done by researchers affiliated with the World Weather Attribution Network shows that human-caused climate change made the June heatwave at least five times more likely to happen. Furthermore, the scientists say in their report that “every heat wave occurring in Europe today is made more likely and more intense by human-induced climate change.”

Heatwaves this intense can put human health at risk and even be deadly in severe cases. A death toll reported that extreme heat Europe in the summer of 2003 led to more than 70,000 deaths throughout the continent.

The heatwave is now advancing towards Greenland, scientists report, and increased heat in the Arctic will likely lead to “another major peak in melt area,” said Twila Moon, a research scientist with the National Snow and Ice Data Center (NSIDC) in Colorado, US, to Live Science.

Simultaneous to the heatwave, a new study has reported that Earth’s current global warming is the only worldwide climate event to have happened in the last 2,000 years. While there have been notable climate events within the last few centuries, such as dramatic temperature changes from volcanic eruptions, the impact of these events were more regional rather than universal. In contrast, the study finds that modern climate change has affected 98 percent of the world.  “Absolutely nothing resembling modern-day global warming has happened on Earth for at least the past 2,000 years,” said the Atlantic.

50 years since one small step

20 July 2019 also marked the 50th anniversary of the first human steps on the Moon. In 1969, NASA astronauts Neil Armstrong and Buzz Aldrin landed on the Moon’s surface as part of the Apollo 11 Mission, revolutionising our understanding of our closest cosmic neighbor. For the 21 hours and 36 minutes on the lunar landscape, Armstrong and Aldrin reported field observations, installed instruments for multiple experiments, and gathered more than 20 kilograms of rock and dust samples.

Since then, scientists have made several discoveries from the data collected during the Apollo 11 Mission. For example, the rocks brought back from the Moon were determined to be about 4.5 billion years old, not much older than the Earth. Geoscientists also found that rocks from the Moon were very similar chemically to those on Earth, suggesting that the two bodies could have evolved in tandem from a large impact event, a leading theory also known as the giant-impact hypothesis.

Lunar Module pilot Buzz Aldrin photographed during the Apollo 11 extravehicular activity on the moon. Aldrin had just deployed the Early Apollo Scientific Experiments Package. In the foreground is the Passive Seismic Experiment Package; beyond it is the Laser Ranging Retro-Reflector (LR-3). Credit: NASA

While operational, the lunar seismometers installed by Armstrong and Aldrin detected ‘moonquakes’ and revealed that the Moon has a relatively small solid core and a thicker crust compared to the Earths’ interior.

Armstrong and Aldrin also set up a Laser Ranging Retroreflector to precisely measure how close the Moon is to the Earth. The retroreflector is still operational to this day, and the data obtained from the experiment shows that the Moon is almost literally inching away from the Earth at 3.8 centimetres (1.5 inches) each year on average.

These examples are just some of the discoveries made following this mission, and scientists are still studying the samples and data obtained 50 years ago to learn more about the Moon, the Earth and the solar system.

“One of the biggest misconceptions is that the Apollo samples aren’t being studied anymore, and that the Apollo samples only tell us about the moon,” says Ryan Zeigler, Apollo sample curator at the Johnson Space Center, in Science News.

What you might have missed

A new study published in July reported that tidewater glaciers, ones that flow from land to sea, could be melting much faster than previously thought. By analysing detailed measurements collected through radar, sonar and time-lapse photography, a team of researchers found that one Alaskan tidewater glacier is releasing a surprising meltwater from below the surface of the ocean.

“The melt rates that we measured were about 10 to 100 times larger than what theory predicted,” says lead study author David A. Sutherland, an oceanographer at the University of Oregon, in Scientific American.

The new findings could help scientists better understand how glaciers respond to global warming and how such glacial melt contributes to sea level rise and impacts local ecosystems.

Researchers studying LeConte Glacier in Alaska have found that its melt rate was 10 to 100 times larger than expected. Credit: US Forest Service, Carey Case

Other noteworthy stories

The EGU story

In July we are advertised another vacancy at the EGU Executive Office in Munich, Germany: EGU Communications Officer. The successful candidate will manage the EGU blogs and social media channels and be the office contact point for early career scientists.

Additionally, we are providing an EGU member with the opportunity to visit Brussels and work alongside a Member of the European Parliament (MEP) for a day. The pairing scheme will enable the selected EGU member to experience the daily work of an MEP, learn more about the role of science in policymaking, and potentially provide expertise on a science-policy issue. Interested EGU members should apply by 6 September.

Also in July, we have opened the call for candidates for EGU Union President, General Secretary and Division Presidents: if you’d like to nominate yourself or propose a candidate, you can do so by 15 September.

Finally, if you’d like to apply for financial support from the EGU to organise a meeting, make sure to submit an application by 15 August. This is also the deadline to submit proposals for Union Symposia and Great Debates at the EGU General Assembly 2020. The deadline for scientific sessions and short courses is 5 September.

Imaggeo on Mondays: Sunset and moonrise at Yosemite

Imaggeo on Mondays: Sunset and moonrise at Yosemite

This side view of Half Dome at Yosemite National Park (California, USA) was taken from Washburn Point, a less frequented overlook a few hundred meters away from the popular Glacier Point outlook. The sun just on the right side behind the camera, which gave the orange tint to the back side of Half Dome. At the same time a full moon was mere minutes from bursting in the background, which resulted in the warm glow of the horizon. A few stars have already started appearing on the clear sky and a few star trails are visible.

Description by Teamrat Ghezzehei, as it first appeared on imaggeo.egu.eu.

Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, these images can be used for free by scientists for their presentations or publications, by educators and the general public, and some images can even be used freely for commercial purposes. Photographers also retain full rights of use, as Imaggeo images are licensed and distributed by the EGU under a Creative Commons licence. Submit your photos at http://imaggeo.egu.eu/upload/.

IGLUNA: students work towards building an icy human habitat on the Moon!

IGLUNA: students work towards building an icy human habitat on the Moon!

What does it take to build a habitat in ice on the Moon? An international group of university students and professionals is working together to provide this answer and develop a sustainable and operational habitat in lunar ice. The project is called IGLUNA and is organised by the Swiss Space Center and the European Space Agency (ESA) as the first initiative from ESA_Lab, an ESA interuniversity research platform where young professionals across Europe can work together on space projects.

Many of the participating students from Vrije Universiteit Amsterdam in the Netherlands presented their work on IGLUNA at the European Geosciences Union General Assembly in Vienna last month. Arlene Dingemans, a VU Amsterdam student and project participant, says,

At the moment, we are a pilot team, the first one working on this project, and we really hope that future teams will develop further this research and maybe, one day, we can go to the Moon!

The North Pole of the Moon where potential lunar cups would be located. Credit: NASA

Human life as we know it today, can only survive under specific environmental conditions; we need the right kind temperature, atmosphere, gravity, radiation, and access to oxygen and water to properly function. On Earth, we have all the necessary resources but as far as we know, our planet is the only place where human life can thrive. Thus, it is vital to carry out research and experiments in order to better understand how human life can be sustainable in places with harsh conditions. The Moon is our closest planetary object and the best place to investigate how life can be supported there.

As part of their project, the group will be testing an analog lunar habitat on Earth, on a glacier in Zermatt, Switzerland, under cold and harsh conditions similar to the Moon’s ice craters in the south pole.

Building a habitat in ice on the Moon also has several benefits. Firstly, water (ice) is essential for life as we know it on Earth, but it can also be used to produce oxygen and fuels. Furthermore, ice is a great insulator for cosmic and solar radiation, and it can function as a shield against micrometeorites.

The field campaign will also involve operating several different experiments that could hypothetically  be done on the moon. Operations will start operations on 17 June, lasting until 3 July; during this time the habitat will also be open to the public, allowing visitors to watch and even take part in experiments.

The entrance tunnel into the Glacier Palace in Klein Matterhorn, Zermatt, Switzerland, where the IGLUNA habitat will be constructed. Credit: Swiss Space Center (SSC) / IGLUNA

The research conducted by the VU Amsterdam team in IGLUNA will focus on geological, glaciological, and astrobiological experiments. Bernard Foing, a professor at VU Amsterdam supervising the student team, highlights: “It’s important not only to live on the Moon, but also to do something really useful. We are going to learn about the Moon, about the Earth, [and] do astronomy. Also this project is a way to exchange expertise and to learn a lot through hands-on activities.”

Marc Heemskerk, participant and student coordinator explains:

The simulation aims to prepare ourselves and humanity in the best possible way for going to the Moon and living there in a semi-permanent or permanent basis. And I really think that it’s not a question of whether we will go to the Moon, but of when we will go. So, eventually, we will have to learn how to live there and how to use local resources.

Transferring resources from the Earth to the Moon in order to build a base it is extremely expensive in terms of energy and money, hence, it is vital to use local materials, Heemskerk explains.

The cave in which the IGLUNA habitat will be constructed – 15m below the surface of the Matterhorn Glacier, Switzerland. Credit: Swiss Space Center (SSC) / IGLUNA

The construction of an operational habitat requires knowledge and skill exchange between people from different backgrounds. 20 student teams coming from 13 universities in nine countries around Europe  from multiple disciplines work together to address the challenges of building an effective structure, which one day could be fully independent and operational on the Moon.

Dieke Beentjes, a participating student emphasizes:

What is also interesting is that our research team is already multidisciplinary. We started out as a team of geologists and now we also have biologists, as biological research is different and needs different instruments – to look at DNA and life traces for example.

The scientific equipment includes cameras, a spectrometer, a microscope, telescopes, a seismometer, drones and many others.

This initiative inspires students to think about the idea of a habitat, while increasing international relationships and collaborations. Marjolein Daeter, another project participant says, “It’s more like an opportunity to get to know this world and we get help from our university and ESA to do that. It’s fun to work with different people on this.”

If you are interested about the project, you can follow the link here: https://www.spacecenter.ch/igluna/ 

By Anastasia Kokori, EGU Press Assistant

References

Benavides, T. et al.: IGLUNA – Habitat in Ice: An ESA_Lab project hosted by the SSC. Geophysical Research Abstracts, Vol. 21, EGU2019-17807, 2019 (conference abstract)

Daeter, M. and Dingemans, A.: VU Science Experiments (VUSE) for Igluna, a science showcase for a Moon ice habitat. Geophysical Research Abstracts, Vol. 21, EGU2019-17500, 2019 (conference abstract)

De Winter, B. et al.: VUSE, VU Science Experiments at Igluna, a Science Showcase for a Moon Ice Habitat. 50th Lunar and Planetary Science Conference 2019 (LPI Contrib. No. 2132) (conference abstract)

Heemskerk, M. V. et al.: IGLUNA Habitat in Ice: An ESA_Lab project hosted by the Swiss Space Center. 50th Lunar and Planetary Science Conference 2019 (LPI Contrib. No. 2132) (conference abstract)