Langdon Chris

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  • Article
    Comment on “Modern-age buildup of CO2 and its effects on seawater acidity and salinity” by Hugo A. Loáiciga
    (American Geophysical Union, 2007-09-25) Caldeira, Ken ; Archer, David ; Barry, James P. ; Bellerby, Richard G. J. ; Brewer, Peter G. ; Cao, Long ; Dickson, Andrew G. ; Doney, Scott C. ; Elderfield, Henry ; Fabry, Victoria J. ; Feely, Richard A. ; Gattuso, Jean-Pierre ; Haugan, Peter M. ; Hoegh-Guldberg, Ove ; Jain, Atul K. ; Kleypas, Joan A. ; Langdon, Chris ; Orr, James C. ; Ridgwell, Andy ; Sabine, Christopher L. ; Seibel, Brad A. ; Shirayama, Yoshihisa ; Turley, Carol ; Watson, Andrew J. ; Zeebe, Richard E.
  • Article
    Productivity of a coral reef using boundary layer and enclosure methods
    (American Geophysical Union, 2011-02-15) McGillis, Wade R. ; Langdon, Chris ; Loose, Brice ; Yates, Kimberly K. ; Corredor, Jorge
    The metabolism of Cayo Enrique Reef, Puerto Rico, was studied using in situ methods during March 2009. Benthic O2 fluxes were used to calculate net community production using both the boundary layer gradient and enclosure techniques. The boundary layer O2 gradient and the drag coefficients were used to calculate productivity ranging from −12.3 to 13.7 mmol O2 m−2 h−1. Productivity measurements from the enclosure method ranged from −11.0 to 12.9 mmol O2 m−2 h−1. During the study, the mean hourly difference between the methods was 0.65 mmol O2 m−2 h−1 (r2 = 0.92), resulting in well-reconciled estimates of net community production between the boundary layer (−33.1 mmol m−2 d−1) and enclosure (−46.3 mmol m−2 d−1) techniques. The results of these independent approaches corroborate quantified rates of metabolism at Cayo Enrique Reef. Close agreement between methods demonstrates that boundary layer measurements can provide near real-time assessments of coral reef health.
  • Article
    Best practice data standards for discrete chemical oceanographic observations
    (Frontiers Media, 2022-01-21) Jiang, Li-Qing ; Pierrot, Denis ; Wanninkhof, Rik ; Feely, Richard A. ; Tilbrook, Bronte ; Alin, Simone R. ; Barbero, Leticia ; Byrne, Robert H. ; Carter, Brendan ; Dickson, Andrew G. ; Gattuso, Jean-Pierre ; Greeley, Dana ; Hoppema, Mario ; Humphreys, Matthew P. ; Karstensen, Johannes ; Lange, Nico ; Lauvset, Siv K. ; Lewis, Ernie R. ; Olsen, Are ; Perez, Fiz F. ; Sabine, Christopher ; Sharp, Jonathan D. ; Tanhua, Toste ; Trull, Thomas W. ; Velo, Anton ; Allegra, Andrew J. ; Barker, Paul M. ; Burger, Eugene ; Cai, Wei-Jun ; Chen, Chen-Tung A. ; Cross, Jessica N. ; Garcia, Hernan E. ; Hernandez-Ayon, Jose Martin ; Hu, Xinping ; Kozyr, Alex ; Langdon, Chris ; Lee, Kitack ; Salisbury, Joseph E. ; Wang, Zhaohui Aleck ; Xue, Liang
    Effective data management plays a key role in oceanographic research as cruise-based data, collected from different laboratories and expeditions, are commonly compiled to investigate regional to global oceanographic processes. Here we describe new and updated best practice data standards for discrete chemical oceanographic observations, specifically those dealing with column header abbreviations, quality control flags, missing value indicators, and standardized calculation of certain properties. These data standards have been developed with the goals of improving the current practices of the scientific community and promoting their international usage. These guidelines are intended to standardize data files for data sharing and submission into permanent archives. They will facilitate future quality control and synthesis efforts and lead to better data interpretation. In turn, this will promote research in ocean biogeochemistry, such as studies of carbon cycling and ocean acidification, on regional to global scales. These best practice standards are not mandatory. Agencies, institutes, universities, or research vessels can continue using different data standards if it is important for them to maintain historical consistency. However, it is hoped that they will be adopted as widely as possible to facilitate consistency and to achieve the goals stated above.
  • Preprint
    Changes in ocean heat, carbon content, and ventilation : a review of the first decade of GO-SHIP Global Repeat Hydrography
    ( 2015-05-30) Talley, Lynne D. ; Feely, Richard A. ; Sloyan, Bernadette M. ; Wanninkhof, Rik ; Baringer, Molly O. ; Bullister, John L. ; Carlson, Craig A. ; Doney, Scott C. ; Fine, Rana A. ; Firing, Eric ; Gruber, Nicolas ; Hansell, Dennis A. ; Ishii, Masayoshi ; Johnson, Gregory ; Katsumata, K. ; Key, Robert M. ; Kramp, Martin ; Langdon, Chris ; Macdonald, Alison M. ; Mathis, Jeremy T. ; McDonagh, Elaine L. ; Mecking, Sabine ; Millero, Frank J. ; Mordy, Calvin W. ; Nakano, T. ; Sabine, Chris L. ; Smethie, William M. ; Swift, James H. ; Tanhua, Toste ; Thurnherr, Andreas M. ; Warner, Mark J. ; Zhang, Jia-Zhong
    The ocean, a central component of Earth’s climate system, is changing. Given the global scope of these changes, highly accurate measurements of physical and biogeochemical properties need to be conducted over the full water column, spanning the ocean basins from coast to coast, and repeated every decade at a minimum, with a ship-based observing system. Since the late 1970s, when the Geochemical Ocean Sections Study (GEOSECS) conducted the first global survey of this kind, the World Ocean Circulation Experiment (WOCE) and Joint Global Ocean Flux Study (JGOFS), and now the Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) have collected these “reference standard” data that allow quantification of ocean heat and carbon uptake, and variations in salinity, oxygen, nutrients, and acidity on basin scales. The evolving GO-SHIP measurement suite also provides new global information about dissolved organic carbon, a large bioactive reservoir of carbon.
  • Article
    Acropora cervicornis Data Coordination Hub, an open access database for evaluating genet performance
    (Rosenstiel School of Marine and Atmospheric Science, 2023-03-24) Kiel, Patrick M. ; Formel, Nathan ; Jankulak, Mike ; Baker, Andrew C. ; Cunning, Ross ; Gilliam, David S. ; Kenkel, Carly ; Langdon, Chris ; Lirman, Diego ; Lustic, Caitlin ; Maxwell, Kerry ; Moulding, Alison L. ; Moura, Amelia ; Muller, Erinn M. ; Schopmeyer, Stephanie ; Winters, R. Scott ; Enochs, Ian C.
    Once one of the predominant reef-building corals in the region, Acropora cervicornis is now a focal species of coral restoration efforts in Florida and the western Caribbean. Scientists and restoration practitioners have been independently collecting phenotypic data on genets of A. cervicornis grown in restoration nurseries. While these data are important for understanding the intraspecific response to varying environmental conditions, and thus the potential genetic contribution to phenotypic variation, in isolation these observations are of limited use for large-scale, multi- institution restoration efforts that are becoming increasingly necessary. Here, we present the Acropora cervicornis Data Coordination Hub, a web-accessible relational database to align disparate datasets to compare genet-specific performance. In this data descriptor, we release data for 248 genets evaluated across 38 separate traits. We present a framework to align datasets with the ultimate goal of facilitating informed, data-driven restoration throughout the Caribbean.