Forecast Impact of Assimilating Aircraft WVSS-II Water Vapor Mixing Ratio Observations in the Global Data Assimilation System GDAS

Hoover, B. T.; Santek, D. A.; Daloz, A.; Zhong, Y.; Dworak, R.; Petersen, R. A.; Collard, A.

doi:10.1175/waf-d-16-0202.1

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Forecast Impact of Assimilating Aircraft WVSS-II Water Vapor Mixing Ratio Observations in the Global Data Assimilation System GDAS

2017
By Hoover, B. T. ; Santek, D. A. ; Daloz, A. ; ...
Source: Weather and Forecasting, 32(4), 1603-1611

[PDF-1.23 MB]

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Journal Title:

Weather and Forecasting
Personal Author:

Hoover, B. T. ; Santek, D. A. ; Daloz, A. ; Zhong, Y. ; Dworak, R. ; ... More +

Hoover, B. T. ; Santek, D. A. ; Daloz, A. ; Zhong, Y. ; Dworak, R. ; Petersen, R. A. ; Collard, A. Less -
NOAA Program & Office:

NWS (National Weather Service) ; NCEP (National Centers for Environmental Prediction) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies)

NWS (National Weather Service) ; NCEP (National Centers for Environmental Prediction) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies) Less -
Description:

Automated aircraft observations of wind and temperature have demonstrated positive impact on numerical weather prediction since the mid-1980s. With the advent of the Water Vapor Sensing System (WVSS-II) humidity sensor, the expanding fleet of commercial aircraft with onboard automated sensors is also capable of delivering high quality moisture observations, providing vertical profiles of moisture as aircraft ascend out of and descend into airports across the continental United States. Observations from the WVSS-II have to date only been monitored within the Global Data Assimilation System (GDAS) without being assimilated. In this study, aircraft moisture observations from the WVSS-II are assimilated into the GDAS, and their impact is assessed in the Global Forecast System (GFS). A two-season study is performed, demonstrating a statistically significant positive impact on both the moisture forecast and the precipitation forecast at short range (12–36 h) during the warm season. No statistically significant impact is observed during the cold season.
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Data Assimilation Observations
Source:

Weather and Forecasting, 32(4), 1603-1611
DOI:

https://doi.org/10.1175/waf-d-16-0202.1
Document Type:

Journal Article
Funding:

Grant no. NA13NWS4830022
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CHORUS
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urn:sha256:0babb8ae535cbf537f8fb701e26de6ab2e31e1c5ba9468b63c6b2fdbf73c7646
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https://repository.library.noaa.gov/view/noaa/48368/noaa_48368_DS1.pdf
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Forecast Impact of Assimilating Aircraft WVSS-II Water Vapor Mixing Ratio Observations in the Global Data Assimilation System GDAS

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