edu.ucar.opensky::articles:19395 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:38:01.483468 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d77h1mbs The Convective Transport of Active Species in the Tropics (CONTRAST) Experiment 2017-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d77h1mbs https://doi.org/10.1175/BAMS-D-14-00272.1 Pan, Laura L. author Atlas, E. L. author Salawitch, R. J. author Honomichl, Shawn B. author Bresch, James author Randel, William author Apel, Eric C. author Hornbrook, Rebecca author Weinheimer, Andrew author Anderson, D. C. author Andrews, S. J. author Baidar, S. author Beaton, Stuart author Campos, Teresa author Carpenter, L. J. author Chen, D. author Dix, B. author Donets, V. author Hall, Samuel R. author Hanisco, T. F. author Homeyer, C. R. author Huey, L. G. author Jensen, Jørgen B. author Kaser, Lisa author Kinnison, Douglas E. author Koenig, T. K. author Lamarque, Jean-François author Liu, C. author Luo, Jiali author Luo, Z. J. author Montzka, Denise D. author Nicely, J. M. author Pierce, R. B. author Riemer, D. D. author Robinson, T. author Romashkin, Pavel A. author Saiz-Lopez, A. author Schauffler, Sue author Shieh, O. author Stell, Meghan author Ullmann, Kirk author Vaughan, G. author Volkamer, R. author Wolfe, G. author UCAR/NCAR - Library publisher The Convective Transport of Active Species in the Tropics (CONTRAST) experiment was conducted from Guam (13.5°N, 144.8°E) during January–February 2014. Using the NSF/NCAR Gulfstream V research aircraft, the experiment investigated the photochemical environment over the tropical western Pacific (TWP) warm pool, a region of massive deep convection and the major pathway for air to enter the stratosphere during Northern Hemisphere (NH) winter. The new observations provide a wealth of information for quantifying the influence of convection on the vertical distributions of active species. The airborne in situ measurements up to 15-km altitude fill a significant gap by characterizing the abundance and altitude variation of a wide suite of trace gases. These measurements, together with observations of dynamical and microphysical parameters, provide significant new data for constraining and evaluating global chemistry–climate models. Measurements include precursor and product gas species of reactive halogen compounds that impact ozone in the upper troposphere/lower stratosphere. High-accuracy, in situ measurements of ozone obtained during CONTRAST quantify ozone concentration profiles in the upper troposphere, where previous observations from balloonborne ozonesondes were often near or below the limit of detection. CONTRAST was one of the three coordinated experiments to observe the TWP during January–February 2014. Together, CONTRAST, Airborne Tropical Tropopause Experiment (ATTREX), and Coordinated Airborne Studies in the Tropics (CAST), using complementary capabilities of the three aircraft platforms as well as ground-based instrumentation, provide a comprehensive quantification of the regional distribution and vertical structure of natural and pollutant trace gases in the TWP during NH winter, from the oceanic boundary to the lower stratosphere. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2017 American Meteorological Society (AMS). None eng geoscientificInformation