edu.ucar.opensky::articles:22086 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:47:24.272400 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7sx6h59 https://doi.org/10.5281/zenodo.1157043 https Related Software #1 Tropd: Tropical Width Diagnostics Software Package The TropD software package (v1): Standardized methods for calculating tropical-width diagnostics 2018-10-26T00:00:00Z publication https://n2t.org/ark:/85065/d7sx6h59 https://doi.org/10.5194/gmd-11-4339-2018 Adam, O. author Grise, K. M. author Staten, P. author Simpson, Isla R. author Davis, S. M. author Davis, N. A. author Waugh, D. W. author Birner, T. author Ming, A. author UCAR/NCAR - Library publisher Observational and modeling studies suggest that Earth's tropical belt has widened over the late 20th century and will continue to widen throughout the 21st century. Yet, estimates of tropical-width variations differ significantly across studies. This uncertainty, to an unknown degree, is partly due to the large variety of methods used in studies of the tropical width. Here, methods for eight commonly used metrics of the tropical width are implemented in the Tropical-width Diagnostics (TropD) code package in the MATLAB programming language. To consolidate the various methods, the operations used in each of the implemented methods are reduced to two basic calculations: finding the latitude of a zero crossing and finding the latitude of a maximum. A detailed description of the methods implemented in the code and of the code syntax is provided, followed by a method sensitivity analysis for each of the metrics. The analysis provides information on how to reduce the methodological component of the uncertainty associated with fundamental aspects of the calculations, such as monthly vs. seasonal averaging biases, grid dependence, sensitivity to noise, and sensitivity to threshold criteria. 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 2018 Author(s). This work is licensed under the Creative Commons Attribution 4.0 International license. None eng geoscientificInformation