Work

On the Use of InSAR for Estimating Timing Errors in Harmonie‐Arome Water Vapor Fields

Year: 2024

Type: article

Abstract: Due to its sensitivity to water vapor, high resolution, and global availability, interferometric satellite radar (InSAR) has a large but unexploited potential for the improvement of regional NWP models. A relatively straightforward approach is to exploit the exact instantaneous character of the InSAR data in data assimilation to improve the timing of NWP model realizations. Here we show the potential impact of InSAR data on the NWP model timing and subsequently on improved model performance. By time‐shifting the model to find the best match with the InSAR data we show that we can achieve a model error reduction (one‐sigma) of up to 40% in cases where weather fronts are present, while other cases show more modest improvements. Most model performance gain due to time‐shifts can therefore be achieved in cases where weather fronts are present over the study area. The model‐timing errors related to the maximum model error reduction for these cases are in the order of 30 min.

Source: Journal of Geophysical Research Atmospheres

DOI: 10.1029/2023jd040566

Authors: Gert Mulder, Jan Barkmeijer, Siebren de Haan, Freek van Leijen, Ramon Hanssen

Institutions: Royal Netherlands Meteorological Institute, Delft University of Technology

Language: English

Topic: Meteorological Phenomena and Simulations

Subfield: Atmospheric Science

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDG: Climate action

Open Access status: hybrid

Estimated APC paid: $3,880