21.02.2020

# New Publications

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Lauderdale, Jonathan Maitland; et al. (2020): Microbial feedbacks optimize ocean iron availability

Lauderdale, Jonathan Maitland; Braakman, Rogier; Forget, Gaël; Dutkiewicz, Stephanie; Follows, Michael J. (2020): Microbial feedbacks optimize ocean iron availability. In Proceedings of the National Academy of Sciences of the United States of America. DOI: 10.1073/pnas.1917277117.

"Dissolved iron is quickly lost from the ocean, but its availability to marine microbes may be enhanced by binding with organic molecules which, in turn, are produced by microbes. We hypothesize this forms a reinforcing cycle between biological activity and iron cycling that locally matches the availability of iron and other nutrients, leading to global-scale resource colimitation between macronutrients and micronutrients, and maximizing biological productivity."

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17.02.2020

# New Publications

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Wilson, Sean M. Wynn, and F. Handan Tezel (2020): Direct Dry Air Capture of CO2 Using VTSA with Faujasite Zeolites

Wilson, Sean M. Wynn, and F. Handan Tezel (2020): Direct Dry Air Capture of CO2 Using VTSA with Faujasite Zeolites. Industrial & Engineering Chemistry Research. https://pubs.acs.org/doi/abs/10.1021/acs.iecr.9b04803.

‌"In the process studied, a basic four step TVSA cycle comprising the following steps: pressurization with feed, adsorption, blowdown, and desorption was investigated first. Four different regeneration temperatures were tested along with four different gas space velocities."

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17.02.2020

# New Publications

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Sen, Raktim, et al. (2020): Hydroxide Based Integrated CO2 Capture from Air and Conversion to Methanol

Sen, Raktim, Alain Goeppert, Sayan Kar, and G.K. Surya Prakash (2020): Hydroxide Based Integrated CO2 Capture from Air and Conversion to Methanol. Journal of the American Chemical Society. https://pubs.acs.org/doi/abs/10.1021/jacs.9b12711.

‌"We postulate that the high capture efficiency and stability of hydroxide bases make them superior to existing amine-based routes for direct air capture and conversion to methanol in a scalable process."

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17.02.2020

# New Publications

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Butnar, Isabela, et al. (2020): The Role of Bioenergy for Global Deep Decarbonization: CO 2 Removal or Low‐carbon Energy?

Butnar, Isabela, Oliver Broad, Baltazar Solano Rodriguez, and Paul E. Dodds (2020): The Role of Bioenergy for Global Deep Decarbonization: CO2 Removal or Low‐carbon Energy? GCB Bioenergy, January. https://doi.org/10.1111/gcbb.12666.

"‌We use a global integrated assessment model, TIAM‐UCL, to investigate the role of bioenergy within the global energy system when direct air capture and afforestation are available as cost‐competitive alternatives to BECCS. We find that the presence of other CO2 removal technologies does not reduce the pressure on biomass resources but changes the use of bioenergy for climate mitigation."

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14.02.2020

# New Publications

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Hemes, Kyle S.; et al. (2020): Wildfire‐smoke aerosols lead to increased light use efficiency among agricultural and restored wetland land uses in California's Central Valley

Hemes, Kyle S.; Verfaillie, Joseph; Baldocchi, Dennis D. (2020): Wildfire‐smoke aerosols lead to increased light use efficiency among agricultural and restored wetland land uses in California's Central Valley. In J. Geophys. Res. Biogeosci. DOI: 10.1029/2019JG005380.

"In this work, we leverage a meso‐network of eddy covariance measurement sites across a unique array of managed and restored C3 and C4 canopy types to understand how recent wildfire smoke affected ecosystem productivity during the summer of 2018, an especially smoky year in the agriculturally productive Central Valley."

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13.02.2020

# New Publications

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Bódai, Tamás; et al. (2020): Can we use linear response theory to assess geoengineering strategies?

Bódai, Tamás; Lucarini, Valerio; Lunkeit, Frank (2020): Can we use linear response theory to assess geoengineering strategies? In Chaos 30 (2), p. 23124. DOI: 10.1063/1.5122255.

"First, our objective (O1) is to assess only the best possible geoengineering scenario by looking for a suitable modulation of solar forcing that can cancel out or otherwise modulate a climate change signal that would result from a rise in carbon dioxide concentration [CO22] alone. [...] Second, to be able to utilize LRT to quantify side-effects, the response with respect to uncontrolled observables, such as regional averages Ts⟨Ts⟩, must be approximately linear."

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09.02.2020

# New Publications

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Lovenduski, N. S.; et al. (2020): The Potential Impact of Nuclear Conflict on Ocean Acidification

Lovenduski, Nicole S., Cheryl S. Harrison, Holly Olivarez, Charles G. Bardeen, Owen B. Toon, Joshua Coupe, Alan Robock, Tyler Rohr, and Samantha Stevenson (2020): The Potential Impact of Nuclear Conflict on Ocean Acidification. Geophysical Research Letters 47 (3). https://doi.org/10.1029/2019gl086246.

"We demonstrate that the global cooling resulting from a range of nuclear conflict scenarios would temporarily increase the pH in the surface ocean by up to 0.06 units over a 5‐year period, briefly alleviating the decline in pH associated with ocean acidification."

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09.02.2020

# New Publications

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Nakabayashi, K.; et al. (2020): Establishment of Innovative Carbon Nanofiber Synthesis Technology Utilizing Carbon Dioxide

Nakabayashi, Koji, Yoshinori Matsuo, Kazuya Isomoto, Kazunari Teshima, Tsubasa Ayukawa, Hiroki Shimanoe, Takashi Mashio, Isao Mochida, Jin Miyawaki, and Seong-Hoo Yoon (2020): Establishment of Innovative Carbon Nanofiber Synthesis Technology Utilizing Carbon Dioxide. ACS Sustainable Chemistry & Engineering. 2020. https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.9b07253#.

"We report herein the effects of CO2 on CNF growth using CO2 and hydrocarbon gases on simply Catalytic Chemical Vapor Deposition (CCVD) catalysts, including Fe, Ni, and Co. Four factors were examined: the effectiveness of the catalyst, the reaction temperature, the CO2 concentration, and the specific hydrocarbons supplied in the feed gas. Use of these techniques will enable one to expect 1) future utilization of exhaust gas emitted from thermal power stations and factories as a carbon source, 2) the future possibility of directly converting CO2 to CNF by utilizing the heat given off by emission from factories and other thermal power-generating facilities as a heat source in CNF synthesis, as well as the future possibility of proposing an effective CO2 utilization system that will be revolutionary in its impact."

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05.02.2020

# New Publications

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Gasparini, Blaž; et al. (2020): To what extent can cirrus cloud seeding counteract global warming?

Gasparini, Blaž; McGraw, Zachary; Storelvmo, Trude; Lohmann, Ulrike (2020): To what extent can cirrus cloud seeding counteract global warming? In Environ. Res. Lett. DOI: 10.1088/1748-9326/ab71a3.

"Previous studies that analyzed modifications of cirrus clouds by seeding of ice nucleating particles showed large uncertainties in both cloud and surface climate responses, ranging from no effect or even a small warming to a globally averaged cooling of about 2.5°C. We use two general circulation models that showed very different responses in previous studies, ECHAM6-HAM and CESM-CAM5, to determine which radiative and climatic responses to cirrus cloud seeding in a 1.5 x CO2 world are common and which are not."

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03.02.2020

# New Publications

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Voskian, Sahag, and T. Alan Hatton (2019): Faradaic Electro-Swing Reactive Adsorption for CO2 Capture

Voskian, Sahag, and T. Alan Hatton (2019): Faradaic Electro-Swing Reactive Adsorption for CO2 Capture. Energy & Environmental Science 12 (12): 3530–47. https://doi.org/10.1039/c9ee02412c.

‌"We report a solid-state faradaic electro-swing reactive adsorption system comprising an electrochemical cell that exploits the reductive addition of CO2 to quinones for carbon capture."

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