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1. Modeling Coastal Water Clarity Using Landsat‐8 and Sentinel‐2

   https://doi.org/10.1029/2022EA002579  

   Lang, Sarah E.; Luis, Kelly M. A.; Doney, Scott C.; Cronin‐Golomb, Olivia; Castorani, Max C. N. (July 2023, Earth and Space Science)

   Abstract Understanding and attributing changes to water quality is essential to the study and management of coastal ecosystems and the ecological functions they sustain (e.g., primary productivity, predation, and submerged aquatic vegetation growth). However, describing patterns of water clarity—a key aspect of water quality—over meaningful scales in space and time is challenged by high spatial and temporal variability due to natural and anthropogenic processes. Regionally tuned satellite algorithms can provide a more complete understanding of coastal water clarity changes and drivers. In this study, we used open‐access satellite data and low‐cost in situ methods to improve estimates of water clarity in an optically complex coastal water body. Specifically, we created a remote sensing water clarity product by compiling Landsat‐8 and Sentinel‐2 reflectance data with long‐term Secchi depth measurements at 12 sites over 8 years in a shallow turbid coastal lagoon system in Virginia, USA. Our satellite‐based model explained ∼33% of the variation in in situ water clarity. Our approach increases the spatiotemporal coverage of in situ water clarity data and improves estimates from bio‐optical algorithms that overpredicted water clarity. This could lead to a better understanding of water clarity changes and drivers to better predict how water quality will change in the future. 

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2. [8+2] vs [4+2] Cycloadditions of Cyclohexadienamines to Tropone and Heptafulvenes—Mechanisms and Selectivities

   https://doi.org/10.1021/jacs.0c10966  

   Chen, Xiangyang; Thøgersen, Mathias Kirk; Yang, Limin; Lauridsen, Rune F.; Xue, Xiao-Song; Jørgensen, Karl Anker; Houk, K. N. (January 2021, Journal of the American Chemical Society)

   null (Ed.)
3. Diopside, enstatite and forsterite solubilities in H2O and H2O-NaCl solutions at lower crustal and upper mantle conditions

   https://doi.org/10.1016/j.gca.2020.03.035  

   Macris, Catherine A.; Newton, Robert C.; Wykes, Jeremy; Pan, Ruiguang; Manning, Craig E. (June 2020, Geochimica et Cosmochimica Acta)
4. 2–8 GHz Interference Detector With 1.1 μs Response

   https://doi.org/10.1109/LMWC.2022.3164021  

   Abu Khater, Mohammad; Peroulis, Dimitrios (June 2022, IEEE Microwave and Wireless Components Letters)
5. Superconductivity and Fermi Surface Studies of β″-(BEDT-TTF)2[(H2O)(NH4)2Cr(C2O4)3]·18-Crown-6

   https://doi.org/10.3390/magnetochemistry9030064  

   Laramee, Brett; Ghimire, Raju; Graf, David; Martin, Lee; Blundell, Toby J.; Agosta, Charles C. (March 2023, Magnetochemistry)

   We report rf-penetration depth measurements of the quasi-2D organic superconductor β″-(BEDT-TTF)2[(H2O)(NH4)2Cr(C2O4)3]·18-crown-6, which has the largest separation between consecutive conduction layers of any 2D organic metal with a single packing motif. Using a contactless tunnel diode oscillator measurement technique, we show the zero-field cooling dependence and field sweeps up to 28 T oriented at various angles with respect to the crystal conduction planes. When oriented parallel to the layers, the upper critical field, Hc2=7.6 T, which is the calculated paramagnetic limit for this material. No signs of inhomogeneous superconductivity are seen, despite previous predictions. When oriented perpendicular to the layers, Shubnikov–de Haas oscillations are seen as low as 6 T, and from these we calculate Fermi surface parameters such as the superconducting coherence length and Dingle temperature. One remarkable result from our data is the high anisotropy of Hc2 in the parallel and perpendicular directions, due to an abnormally low Hc2⊥=0.4 T. Such high anisotropy is rare in other organics and the origin of the smaller Hc2⊥ may be a consequence of a lower effective mass. 

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