Ponencia presentada en: 15th International Winds Workshop celebrada del 12 al 16 de abril de 2021

García Pereda, Javier

Håkansson, Nina

English

Agencia Estatal de Meteorología

Fifteenth International Winds Workshop      -     April 2021 NWCSAF/High Resolution Winds AMV Software for Geostationary and Polar satellites Status in 2021 12-16 April 2021 Fifteenth International Winds Workshop Javier García-Pereda (NWCSAF/AEMET) Nina Håkansson (NWCSAF/SMHI) Fifteenth International Winds Workshop      -     April 2021 Example of High Resolution Winds from NWCSAF Helpdesk (nwc-saf.eumetsat.int) for 1 June 2019 1200Z, MSG-4 •  High Resolution Winds software provides a detailed calculation of     “Atmospheric Motion Vectors (AMVs)” and “Trajectories”, inside     the NWCSAF Software packages for Meteorological Services and Researchers. •  Latest version released in January 2020      (NWC/GEO v2018.1 Software package for geostationary satellites). 2 NWC/GEO-High Resolution Winds v2018.1 Fifteenth International Winds Workshop      -     April 2021 Updates included in HRW v2018.1:  1. Implementation of the “New IWWG AMV BUFR” output (sequence 310077) 2. Adaptation of HRW algorithm to GOES-16 satellite:     ! Adaptation equivalent to Himawari-8/9,           using the same satellite channels           (VIS06, VIS08, WV062, WV070, WV074, IR112).     ! Satellite input data: GOES-R NetCDF from NOAA. NWC/GEO-High Resolution Winds v2018.1 3 Fifteenth International Winds Workshop      -     April 2021 NWC/GEO-High Resolution Winds v2018.1 4 Options for AMV calculation in HRW v2018.1:       - MSG-1/4 (AMVs every 15 or 5 min.)          - Himawari-8/9 (AMVs every 10 min.)      - GOES-13/15 (AMVs every 30 or 15 min.)  - GOES-16 (AMVs every 15 or 10 min.) Similar validation for all satellites;                  slightly better,           with more positive BIAS,           for Himawari & GOES-16 Fifteenth International Winds Workshop      -     April 2021 The extension to additional GOES-R satellites is also in the working plan. However, with the problems in the cooling system of GOES-17/ABI Imager:     ! Significant noise can occur in the           satellite images and NWCSAF products.    ! Filtering of noisy data is needed           using available “quality flags”.     ! The extension to GOES-17          is going to be implemented          in the following update during 2021.                                                                                  (Example of noisy NWCSAF/Cloud type                                                                                                            for GOES-17 satellite)  NWC/GEO-High Resolution Winds v2018.1 5 Fifteenth International Winds Workshop      -     April 2021 A requirement from NWCSAF users exists to extend NWCSAF/High Resolution Winds to polar satellites:    ! European Nordic weather services          wish more wind data for NWP assimilation at high latitudes,          with a stringent timeliness requirement of 15 minutes!    ! No other dataset of winds from polar orbiting satellites          can satisfy this timeliness requirement. 6 NWC/PPS-HRW (Adaptation to polar satellites) Fifteenth International Winds Workshop      -     April 2021 Considering this:     ! HRW has being extended to calculate AMVs and Trajectories            from reprojected polar images in static regions of different sizes,           in a similar way to what is being done for geostationary satellites.     ! Several polar satellites/instruments           are considered for this:              - NOAA & Metop/AVHRR-3                        In later versions also:              - S-NPP & JPSS/VIIRS    - FY-3/Mersi-2              - EOS/MODIS                                          - EPS-SG-A/MetImage     ! The quantity and quality of AMVs is maximized      optimizing the best pair of images for each calculation considering:             - The time separation between images.             - The percentage of common scanning in the static processing region. 7 NWC/PPS-HRW (Adaptation to polar satellites) Fifteenth International Winds Workshop      -     April 2021 NWC/PPS-HRW is based on an adaptation of NWC/GEO-HRW v2018.1 code. HRW code kept as an only software element valid for both software packages  (NWC/GEO and NWC/PPS), but installed with two different “makefiles”.    ! Two different “executables” are so produced.    ! However, 90% of the code is exactly the same for both implementations! This way, results for NWC/PPS-HRW in perfect consonance with those for NWC/GEO-HRW! 8 HRW outputs will be exactly equivalent for both geostationary and polar options.     ! Someone already using NWC/GEO-HRW can use NWC/PPS-HRW very quickly. NWC/PPS-HRW (Adaptation to polar satellites) Fifteenth International Winds Workshop      -     April 2021 For NWC/GEO-HRW, the “satellite zenith angle”  defines a geographical limit for the AMV calculation. Example for 14/June/2019 09:00Z, comparing AMVs obtained by NWC/GEO-HRW algorithm and NWC/PPS-HRW algorithm: 9 NWC/PPS-HRW (Adaptation to polar satellites) For NWC/PPS-HRW, there are no geographical limits for AMV calculation,  but the AMV temporal/spatial density  is smaller (calculating AMVs  only with VIS06/IR108 channels). Fifteenth International Winds Workshop      -     April 2021 A 3 month period in two regions with two different pixel resolutions (5 km per pixel “Europe” and 1 km per pixel “Scandinavia”) has been used for development, testing and validation !  NWC/PPS-HRW AMV validation is inside the “Target accuracy”  for all layers in both validation regions. !  Comparing with NWC/GEO-HRW AMVs:   - NMVD/NRMSVD values are similar or slightly higher (up to 15%)  - Vertical distribution of AMVs and AMV validation    behave similarly (better for high levels and worse for low levels). 10 NWC/PPS-HRW (Adaptation to polar satellites) Fifteenth International Winds Workshop      -     April 2021 The plan for this work is:    ! Delivery of a “beta version of NWC/PPS-HRW”          for evaluation, testing and applicability            - Release to users throughout 2021.            - Prepared since Summer 2019 by              Javier García-Pereda (AEMET, Spain) & Nina Håkansson (SMHI, Sweden).    ! Delivery of the “first official version of NWC/PPS-HRW”           inside NWCSAF/CDOP4 phase (> 2022). With both NWC/GEO-HRW and NWC/PPS-HRW:     ! The user is going to be able to obtain AMVs with the same algorithm           in all corners of the world with a high update frequency.     ! This is better than what other AMV products can do,            due to the larger number of processable satellites,           and can be important for example for            Global NWP assimilation and Climatic studies. 11 NWC/PPS-HRW (Adaptation to polar satellites) Fifteenth International Winds Workshop      -     April 2021 12 (Up to the end of current NWCSAF/CDOP3 phase) I. NWC/GEO-HRW for MTG-Imager.     ! The experience with Himawari-8/9 and GOES-R           is very helpful for this adaptation.     ! Currently, main difficulties related to:            - The optimal use for AMV extraction of               High resolution channels VIS06 and VIS08.            - Better distribution of AMVs at medium and low levels. II. Optimization of HRW code. Other developments with HRW up to 2022 Fifteenth International Winds Workshop      -     April 2021 Plans for the following years have been agreed with Eumetsat inside “NWCSAF/CDOP4 phase (2022-2027) Proposal”: I. Improvements due to updates in NWCSAF/Cloud products:      ! Stratiform and cumuliform cloud separation      ! Improvements in CTTH and CMIC products      ! Better assessment of multilayer clouds and semitransparent clouds.  II. Improvements suggested by NWCSAF users:      ! Inclusion of “Error in the AMV displacement”            as defined by Graeme Kelly/MetOffice.      ! Inclusion of “Aeronautical units (flight level)”            in the AMVs for use by aviation. 13 Plans for NWCSAF/CDOP4 phase (2022-2027) Fifteenth International Winds Workshop      -     April 2021 III. Possible implementation of “stereo height assignment”       ! Considering the parallax displacement of an AMV              observed by two geostationary satellites in two different locations.           We keep the interest of having collaboration of experts in this task for the implementation through a “NWCSAF Visiting Scientist Activity” (f.ex. James Carr, Dong Wu,…) IV. Implementation of the NOAA/NESDIS “nested tracking”       ! Considering several tracers of smaller size inside a large tracer. 14 Plans for NWCSAF/CDOP4 phase (2022-2027) Fifteenth International Winds Workshop      -     April 2021 15 V. Further studies related to winds from hyperspectral retrievals      (MTG-Sounder radiances or T/q profiles)         ! From the several working groups in this area              it seems clear that               the “optical flow” perspective is winning the deal.        ! A feasibility study has also been recommended              to the NWCSAF to check              how worthwhile it still is to calculate AMVs with MTG-Sounder data. Plans for NWCSAF/CDOP4 phase (2022-2027) Fifteenth International Winds Workshop      -     April 2021 Due to its characteristics and its ease to be obtained/understood/run locally, NWCSAF/HRW was proposed at previous “International Winds Workshops” as “Stand-alone AMV calculation software” available for all AMV researchers and users. Its good validation results by independent studies (2014/2018 AMV intercomparisons) and its usability with many satellites in all areas of the world should be enough to convince any researchers about the use of NWCSAF/HRW.                  For any further need or help, do not hesitate to contact me                                      Thank you very much for listening!                                                   Javier García-Pereda                                                   <jgarciap@aemet.es> 16 NWCSAF/HRW as “Stand-alone AMV software” View publication stats

NWCSAF/High Resolution Winds AMV Software for Geostationary and Polar satellites Status in 2021

https://repositorio.aemet.es/bitstream/20.500.11765/15179/3/15IWWG_JavierGarciaPereda_PresentationShort.pdf

NWCSAF/High Resolution Winds AMV Software for Geostationary and Polar satellites Status in 2021

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