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Title: Analysis of errors introduced by geographic coordinate systems on weather numeric prediction modeling

Most atmospheric models, including the Weather Research and Forecasting (WRF) model, use a spherical geographic coordinate system to internally represent input data and perform computations. However, most geographic information system (GIS) input data used by the models are based on a spheroid datum because it better represents the actual geometry of the earth. WRF and other atmospheric models use these GIS input layers as if they were in a spherical coordinate system without accounting for the difference in datum. When GIS layers are not properly reprojected, latitudinal errors of up to 21 km in the midlatitudes are introduced. Recent studies have suggested that for very high-resolution applications, the difference in datum in the GIS input data (e.g., terrain land use, orography) should be taken into account. However, the magnitude of errors introduced by the difference in coordinate systems remains unclear. This research quantifies the effect of using a spherical vs. a spheroid datum for the input GIS layers used by WRF to study greenhouse gas transport and dispersion in northeast Pennsylvania.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [1]
  1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Geography. Inst. for CyberScience
  2. Pennsylvania State Univ., University Park, PA (United States). Dept. of Geography. Inst. for CyberScience; National Center for Atmospheric Research, Boulder, CO (United States). Research Application Lab.
  3. Pennsylvania State Univ., University Park, PA (United States). Dept. of Meteorology and Atmospheric Science
Publication Date:
Grant/Contract Number:
FE0013590; N00014-16-1-2543
Type:
Accepted Manuscript
Journal Name:
Geoscientific Model Development (Online)
Additional Journal Information:
Journal Name: Geoscientific Model Development (Online); Journal Volume: 10; Journal Issue: 9; Journal ID: ISSN 1991-9603
Publisher:
European Geosciences Union
Research Org:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE); Office of Naval Research (ONR) (United States)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES
OSTI Identifier:
1427989