Value-added Impact of Geostationary Hyperspectral Infrared Sounders on Local Severe Storm Forecasts-via a Quick Regional OSSE

Li, Zhenglong; Li, Jun; Wang, Pei; Lim, Agnes; Li, Jinlong; Schmit, Timothy J.; Atlas, Robert; Boukabara, Sid-Ahmed; Hoffman, Ross N.

doi:10.1007/s00376-018-8036-3

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Value-added Impact of Geostationary Hyperspectral Infrared Sounders on Local Severe Storm Forecasts-via a Quick Regional OSSE

2018
By Li, Zhenglong ; Li, Jun ; Wang, Pei ; ...
Source: Advances in Atmospheric Sciences, 35(10), 1217-1230.

[PDF-3.36 MB]

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Journal Title:

Advances in Atmospheric Sciences
Personal Author:

Li, Zhenglong ; Li, Jun ; Wang, Pei ; Lim, Agnes ; Li, Jinlong ; ... More +

Li, Zhenglong ; Li, Jun ; Wang, Pei ; Lim, Agnes ; Li, Jinlong ; Schmit, Timothy J. ; Atlas, Robert ; Boukabara, Sid-Ahmed ; Hoffman, Ross N. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research)

OAR (Oceanic and Atmospheric Research) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research) Less -
Description:

Accurate atmospheric temperature and moisture information with high temporal/spatial resolutions are two of the key parameters needed in regional numerical weather prediction (NWP) models to reliably predict high-impact weather events such as local severe storms (LSSs). High spectral resolution or hyperspectral infrared (HIR) sounders from geostationary orbit (GEO) provide an unprecedented source of near time-continuous, three-dimensional information on the dynamic and thermodynamic atmospheric fields-an important benefit for nowcasting and NWP-based forecasting. In order to demonstrate the value of GEO HIR sounder radiances on LSS forecasts, a quick regional OSSE (Observing System Simulation Experiment) framework has been developed, including high-resolution nature run generation, synthetic observation simulation and validation, and impact study on LSS forecasts. Results show that, on top of the existing LEO (low earth orbit) sounders, a GEO HIR sounder may provide value-added impact [a reduction of 3.56% in normalized root-mean-square difference (RMSD)] on LSS forecasts due to large spatial coverage and high temporal resolution, even though the data are assimilated every 6 h with a thinning of 60 km. Additionally, more frequent assimilations and smaller thinning distances allow more observations to be assimilated, and may further increase the positive impact from a GEO HIR sounder. On the other hand, with denser and more frequent observations assimilated, it becomes more difficult to handle the spatial error correlation in observations and gravity waves due to the limitations of current assimilation and forecast systems (such as a static background error covariance). The peak reduction of 4.6% in normalized RMSD is found when observations are assimilated every 3 h with a thinning distance of 30 km.
Source:

Advances in Atmospheric Sciences, 35(10), 1217-1230.
DOI:

https://doi.org/10.1007/s00376-018-8036-3
Document Type:

Journal Article
Funding:

Grant no. NA15NES4320001
Rights Information:

Accepted Manuscript
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Submitted
Main Document Checksum:

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urn:sha256:5e33225a5162743cec316812a600db8c8e3702984bbc24f1803cf7478662a8f8
Download URL:

https://repository.library.noaa.gov/view/noaa/21713/noaa_21713_DS1.pdf
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Value-added Impact of Geostationary Hyperspectral Infrared Sounders on Local Severe Storm Forecasts-via a Quick Regional OSSE

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