Does This Mineral Indicate Oxygen on Mars?
Eos: Earth and Space Science News
by Elise Cutts
7h ago
Brownish black and lumpy, manganese oxides aren’t minerals you’d find dangling from a pendant or set in a ring. But what they lack in style, they make up for in significance. On Earth, scientists consider the drab minerals to be signatures of atmospheric oxygen. When rovers in the Gale and Endeavour craters spotted them on Mars, some scientists even concluded that Mars’s atmosphere must have contained oxygen in the past. However, what’s true on Earth isn’t always true on Mars. And there’s more than one way to cook up manganese oxides. “Whether the Martian atmosphere contained oxygen in ancie ..read more
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How Much Greenhouse Gas Do Tropical Soils Emit?
Eos: Earth and Space Science News
by Sarah Derouin
7h ago
Source: Journal of Geophysical Research: Biogeosciences Nitrogen changes form as it cycles between air, soil, and life. Soils, for example, emit nitrogen either as inert dinitrogen (N2), which dominates our atmosphere, or as nitric oxide (NO) or nitrous oxide (N2O), the greenhouse gases that warm it. Understanding what types of nitrogen gas emissions are coming from soils is important in managing greenhouse gas emissions and characterizing nitrogen budgets globally. But because Earth’s atmosphere is teeming with dinitrogen gas, it can be difficult to measure the small N2 emissions from soils a ..read more
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El agua subterránea se repone mucho más rápido de lo que pensaban los científicos
Eos: Earth and Space Science News
by Rachel Fritts
7h ago
Fuente: Geophysical Research Letters This is an authorized translation of an Eos article. Esta es una traducción al español autorizada de un artículo de Eos. Una gran parte del suministro de agua dulce mundial viene del agua subterránea. Estos reservorios subterráneos de agua, los cuales están almacenados en suelos y acuíferos, alimentan ríos, mantienen tierras agrícolas y proveen de agua potable a cientos de millones de personas. Por esa razón, los investigadores quieren entender qué tan rápido el agua superficial repone, o “recarga”, los depósitos de agua subter ..read more
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Scientists Improve Hurricane Resilience in the Colombian Caribbean
Eos: Earth and Space Science News
by Santiago Flórez
3d ago
In November 2020 Hurricanes Eta and Iota struck 2 weeks apart, causing dozens of deaths and widespread damage to San Andrés, a Colombian archipelago off the eastern coast of Nicaragua. On the island of Providencia, 98% of the infrastructure was destroyed or suffered significant damage. The events led local officials, researchers, and residents to search for new strategies to manage hurricane risk in the region. In the wake of the disaster, a group of researchers from the Universidad Nacional de Colombia installed acoustic sensors in the Caribbean Sea to measure wave heights and ocean currents ..read more
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The Rise of Gaming-Based Virtual Field Trips
Eos: Earth and Space Science News
by Jenessa Duncombe
3d ago
You’re flying over a hill of rock that’s as big as a whale’s back and just as gray and speckled. You touch your feet down onto the beast and peer at the scratch marks along its fault lines. You’re not in a dream, but a game-based virtual field trip to the Whaleback anticline—an iconic exposure of folded rock in central Pennsylvania. Designed using a popular gaming engine, the virtual “field adventure” allows users to clamber, fly, and extract real-world data from the landscape around them. “It’s very open-ended,” said University of Washington geologist Juliet G. Crider, one of the scientists ..read more
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量化造林的碳储存潜力
Eos: Earth and Space Science News
by Benjamin Sulman
4d ago
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Earth’s Future This is an authorized translation of an Eos article. 本文是Eos文章的授权翻译 大规模植树造林项目已被提议作为一种碳封存策略来减缓人为气候变化。 在中国南方,近几十年来的植树活动显著扩大了森林面积,并在树木生物量中封存了大量的碳。 了解历史上的碳封存和未来通过造林储存碳的潜力对于制定气候变化减缓战略具有重要意义。 在这里,Zhang等人[2022]结合了数据合成、遥感和机器学习方法来估计中国南方森林的历史轨迹和潜在的碳储存能力。他们发现,在15年的研究期间,区域森林的碳储量有所增加,这意味着碳封存取得了成功。他们还发现了在造林项目中进一步增加碳密度的机会。然而,他们也发现该地区的森林已经达到了其碳储存能力的73%以上,这表明单靠造林作为一种碳封存策略最终将面临限制。 Citation: Zhang, X. M., Brandt, M., Yue, Y. M., Tong, X. W., Wang, K. L., & Fensholt, R. (2022). The carbon sink pot ..read more
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Quantifying the Potential of Forestation for Carbon Storage
Eos: Earth and Space Science News
by Benjamin Sulman
4d ago
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Earth’s Future A translation of this article was made by Wiley. 本文由Wiley提供翻译稿。 Large-scale forest planting projects have been proposed as a carbon sequestration strategy for mitigating anthropogenic climate change. In southern China, tree-planting initiatives over recent decades have significantly expanded forested areas and sequestered substantial amounts of carbon in tree biomass. Understanding both the historical carbon sequestration and the potential for future carbon storage throu ..read more
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Mentorship Builds Inclusivity and Belonging in the Geosciences
Eos: Earth and Space Science News
by Melissa A. Burt, Rebecca T. Barnes, Sarah Schanz, Sandra Clinton and Emily V. Fischer
4d ago
People from marginalized communities pursuing degrees in science, technology, engineering, or mathematics (STEM) disciplines face obstacles such as hostile environments (e.g., sexual harassment), lack of representation, and poor mentorship that challenge their sense of belonging [e.g., Berhe et al., 2022]. This is true for Black, Indigenous, and Latinx/e people, as well as for other people of color, LGBTQIA+ people, white women, and people with disabilities. Efforts to diversify the STEM community and workforce have focused largely on recruitment while neglecting the work needed to retain ind ..read more
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What’s Up at the Bottom of the Ocean?
Eos: Earth and Space Science News
by Caryl-Sue Micalizio
5d ago
The seafloor is not as serene as it seems. In fact, it’s a busy, flexible hub of scientific activity. Our changing climate and the crucial nexus of ocean and atmosphere are driving scientists to collate and curate a centralized database of seawater oxygen isotope data. Such isotopes can inform us about processes related to ocean cir­culation, riverine input, ocean-atmosphere water exchange, and continental ice sheet volume on timescales spanning glacial–interglacial periods and longer, write Kristine DeLong, Alyssa Atwood, Andrea Moore, and Sara Sanchez, but efforts to create a machine-readab ..read more
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Grains of Sand: Too Much and Never Enough
Eos: Earth and Space Science News
by Alka Tripathy-Lang
5d ago
Smartphone screens, wine bottles, and porcelain toilets share a surprising ingredient: sand. In fact, the ubiquitous material is the second most exploited natural resource on Earth, after water. Most sand pours into the construction industry, which in turn pours much of it into concrete. “Sand is the most mined solid material on Earth, and we’re using more and more sand as we’re becoming more and more people,” said Mette Bendixen, a physical geographer at McGill University in Montreal. “The use of sand is now faced with two major challenges,” said Xiaoyang Zhong, a doctoral student in environ ..read more
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