the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Evaluation of microwave radiances of GPM/GMI for the all-sky assimilation in RTTOV framework
Rohit Mangla
Indu Jayaluxmi
Abstract. This study evaluates the all-sky GPM/GMI radiances towards assimilation in regional mesoscale model at 183 ± 7 GHz. The radiative transfer model (RTM) namely RTTOV-SCATT is used for the simulation of three tropical cyclones (hudhud, vardah and kyant respectively). Within the RTM, the performance of non-spherical Discrete Dipole Approximation (DDA) shapes (sector snowflake, 6-bullet rosette, block-column and thinplate) are evaluated. The input data used in RTTOV-SCATT includes vertical hydrometeor profiles, humidity and surface fluxes. In addition, the first guess simulations from Weather Research Forecast (WRF) model were executed at 15 km resolution using ERA-Interim reanalysis datasets. Results indicate that observed minus first guess (FG departures) are symmetric with DDA shapes. The normalized probability density function of FG departures shows large number of spatially correlated samples between clear-sky and poorly forecasted region. Quality control (QC) method was performed to eliminate large FG departures due to instrumental anomalies or poor forecast of clouds and precipitation. The goodness of fit test, h-statistics and skewness of observed and simulated distribution show optimum results for thinplate shape in all the convective events. We also tested the high resolution ERA-5 reanalysis datasets for the simulation of all-sky radiances using thinplate shape. Results illustrate a potential to integrate the GMI sensor data within a WRF data assimilation system.
- Preprint
(1834 KB) - Metadata XML
- BibTeX
- EndNote
Rohit Mangla and Indu Jayaluxmi


-
RC1: 'Review of manuscript « Evaluation of microwave radiances of GPM/GMI for the all-sky assimilation in RTTOV framework » by Rohit Mangla and Jayaluxmi Indu', Anonymous Referee #1, 04 Dec 2018
-
AC1: 'Point by point response to comments by Reviewer 1', Indu Jayaluxmi, 13 Feb 2019
-
AC1: 'Point by point response to comments by Reviewer 1', Indu Jayaluxmi, 13 Feb 2019
-
RC2: 'shape preferences go local', Anonymous Referee #2, 18 Jan 2019
-
AC2: 'Point by point response to comments by Reviewer 2', Indu Jayaluxmi, 13 Feb 2019
-
AC2: 'Point by point response to comments by Reviewer 2', Indu Jayaluxmi, 13 Feb 2019


-
RC1: 'Review of manuscript « Evaluation of microwave radiances of GPM/GMI for the all-sky assimilation in RTTOV framework » by Rohit Mangla and Jayaluxmi Indu', Anonymous Referee #1, 04 Dec 2018
-
AC1: 'Point by point response to comments by Reviewer 1', Indu Jayaluxmi, 13 Feb 2019
-
AC1: 'Point by point response to comments by Reviewer 1', Indu Jayaluxmi, 13 Feb 2019
-
RC2: 'shape preferences go local', Anonymous Referee #2, 18 Jan 2019
-
AC2: 'Point by point response to comments by Reviewer 2', Indu Jayaluxmi, 13 Feb 2019
-
AC2: 'Point by point response to comments by Reviewer 2', Indu Jayaluxmi, 13 Feb 2019
Rohit Mangla and Indu Jayaluxmi
Rohit Mangla and Indu Jayaluxmi
Viewed
HTML | XML | Total | BibTeX | EndNote | |
---|---|---|---|---|---|
1,077 | 320 | 39 | 1,436 | 43 | 42 |
- HTML: 1,077
- PDF: 320
- XML: 39
- Total: 1,436
- BibTeX: 43
- EndNote: 42
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1