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1. NO x Lifetime and NO y Partitioning During WINTER

   https://doi.org/10.1029/2018JD028736  

   Kenagy, Hannah S. ; Sparks, Tamara L. ; Ebben, Carlena J. ; Wooldrige, Paul J. ; Lopez-Hilfiker, Felipe D. ; Lee, Ben H. ; Thornton, Joel A. ; McDuffie, Erin E. ; Fibiger, Dorothy L. ; Brown, Steven S. ; et al ( September 2018 , Journal of Geophysical Research: Atmospheres)
2. ClNO 2 Yields From Aircraft Measurements During the 2015 WINTER Campaign and Critical Evaluation of the Current Parameterization

   https://doi.org/10.1029/2018JD029358  

   McDuffie, Erin E. ; Fibiger, Dorothy L. ; Dubé, William P. ; Lopez Hilfiker, Felipe ; Lee, Ben H. ; Jaeglé, Lyatt ; Guo, Hongyu ; Weber, Rodney J. ; Reeves, J. Michael ; Weinheimer, Andrew J. ; et al ( November 2018 , Journal of Geophysical Research: Atmospheres)

   Nitryl chloride (ClNO₂) plays an important role in the budget and distribution of tropospheric oxidants, halogens, and reactive nitrogen species. ClNO₂is formed from the heterogeneous uptake and reaction of dinitrogen pentoxide (N₂O₅) on chloride‐containing aerosol, with a production yield,ϕ(ClNO₂), defined as the moles of ClNO₂produced relative to N₂O₅lost. Theϕ(ClNO₂) has been increasingly incorporated into 3‐D chemical models where it is parameterized based on laboratory‐derived kinetics and currently accepted aqueous‐phase formation mechanism. This parameterization modelsϕ(ClNO₂) as a function of the aerosol chloride to water molar ratio. Box model simulations of night flights during the 2015 Wintertime INvestigation of Transport, Emissions, and Reactivity (WINTER) aircraft campaign derived 3,425 individualϕ(ClNO₂) values with a median of 0.138 and range of 0.003 to 1. Comparison of the box model median to those predicted by two other field‐basedϕ(ClNO₂) derivation methods agreed within a factor of 1.3, within the uncertainties of each method. In contrast, the box model median was 75–84% lower than predictions from the laboratory‐based parameterization (i.e., [parameterization − box model]/parameterization). An evaluation of factors influencing this difference reveals a positive dependence ofϕ(ClNO₂) on aerosol water, opposite to the currently parameterized trend. Additional factors may include aqueous‐phase competition reactions for the nitronium ion intermediate and/or direct ClNO₂loss mechanisms. Further laboratory studies of ClNO₂formation and the impacts of aerosol water, sulfate, organics, and ClNO₂aqueous‐phase reactions are required to elucidate and quantify these processes on ambient aerosol, critical for the development of a robustϕ(ClNO₂) parameterization.

    

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3. Top-Down Estimates of NO x and CO Emissions From Washington, D.C.-Baltimore During the WINTER Campaign

   https://doi.org/10.1029/2018JD028539  

   Salmon, O. E. ; Shepson, P. B. ; Ren, X. ; He, H. ; Hall, D. L. ; Dickerson, R. R. ; Stirm, B. H. ; Brown, S. S. ; Fibiger, D. L. ; McDuffie, E. E. ; et al ( July 2018 , Journal of Geophysical Research: Atmospheres)
4. Extreme wave activity during 2013/2014 winter and morphological impacts along the Atlantic coast of Europe: EXTREME ATLANTIC WAVES DURING 2013/2014

   https://doi.org/10.1002/2015GL067492  

   Masselink, Gerd ; Castelle, Bruno ; Scott, Tim ; Dodet, Guillaume ; Suanez, Serge ; Jackson, Derek ; Floc'h, France ( March 2016 , Geophysical Research Letters)
5. Winter Ecosystem Respiration and Sources of CO 2 From the High Arctic Tundra of Svalbard: Response to a Deeper Snow Experiment

   https://doi.org/10.1029/2018JG004396  

   Lupascu, M. ; Czimczik, C. I. ; Welker, M. C. ; Ziolkowski, L. A. ; Cooper, E. J. ; Welker, J. M. ( August 2018 , Journal of Geophysical Research: Biogeosciences)