Navy Aerosol and Visibility Forecasting: Use of Satellite Aerosol Data

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Presentation transcript:

Navy Aerosol and Visibility Forecasting: Use of Satellite Aerosol Data Edward Hyer NRL – Monterey, CA NOAA Satellite Aerosol Workshop – College Park, MD 14 September 2016

In This Talk Navy Aerosol Forecasting: Motivation Satellite Data in the Forecasting System Specific product needs for data assimilation Satellite data pre-processing for assimilation Results with VIIRS IDPS Aerosol product Results with VIIRS Enterprise Aerosol product Next Steps U.S. Naval Research Laboratory

Navy Aerosol Prediction - Motivation 18 July 2009 Phoenix Sky Harbor Intl. Airport 26 October 2007 Channel Islands Air National Guard Base Can you tell us when this is coming? How long until we can see again? Visibility Impacts: Optical Atmosphere Physical Impacts: e.g. dust/ash in jet engines Health impacts U.S. Naval Research Laboratory

Satellite Data in Navy Aerosol Applications Component Assimilated Data FLAMBE – Hourly, global, biomass emission fluxes in real-time and archived since 2000 DSD – Global dust source database NAVDAS-AOD – data assimilation, produces 6- hourly, global 3-d distributions of aerosol species (sulfate, smoke, dust, salt), in real-time and back to 2000 NAAPS Validation MODIS and GOES data used to produce gridded smoke emissions (FLAMBE, WF-ABBA) R&D: Himawari-8 (GOES-R to come) MODIS Dust Enhancement Product, NRL DEBRA product from Meteosat, and TOMS AI used to identify dust sources NRL Level 3 version of MODIS AOD --+VIIRS AOD +AVHRR AOD AERONET and CALIPSO climatology used for speciation R&D: CALIPSO used for 3-d var data assimilation and validation , GEO AOD under testing AERONET – AOD, absorption, size CALIPSO and MISR – Vertical Profile U.S. Naval Research Laboratory

The Navy Aerosol Analysis and Prediction System (NAAPS) Operational since 2005 (first global operational forecast in the world) Satellite AOD assimilation operational since 2009 (world’s first) In 2013, NAAPS was upgraded from 1-degree to 1/3-degree resolution Also upgraded from NOGAPS to NAVGEM meteorology Model details in Lynch et al. GMD 2016 U.S. Naval Research Laboratory

AOD Data Assimilation for NAAPS MODIS RGB MODIS AOD Navy Aerosol Analysis and Prediction System (NAAPS) operational since 2005 Navy Variational Data Assimilation System for AOD (NAVDAS-AOD) Operational at FNMOC from September 2009 (MODIS over ocean) Global MODIS is assimilated operationally as of February 2012 J.L. Zhang et al., “A System for Operational Aerosol Optical Depth Data Assimilation over Global Oceans”, JGR 2008. NAAPS “Prior” NAAPS + NAVDAS U.S. Naval Research Laboratory

Preparation of Satellite AOD for Assimilation We start with Level 2 products generated by upstream data centers U.S. Naval Research Laboratory

Preparation of Satellite AOD for Assimilation Post-process developed by NRL and UND, includes Aggressive cloud filtering Ocean wind speed correction Land albedo correction land surface and snow filters Microphysical AOD bias correction Aggregation for noise reduction Estimation of prognostic uncertainty U.S. Naval Research Laboratory

NRL’s process for QA/QC of new satellite AOD products: 5 stages Starting with a multi-month record of L2 data… L2/L2 comparison to AERONET at full resolution L2/L2 comparison to MODIS Generation of candidate L3 AOD… L3/L3 comparison to currently assimilated datasets Test runs of NAAPS+NAVDAS-AOD using new data… Model/Model comparison of analyzed aerosol fields Model/AERONET comparison and model verification U.S. Naval Research Laboratory

Aerosol Data Products – Lots of Them! Polar MODIS Geostationary Dark Target GOES Levy et al., AMT 2013 GASP Deep Blue Prados et al., JGR 2007 Sayer et al., JGR 2013 Korea COMS MAIAC Meteorological Imager Lyapustin et al., JGR 2011 Mijin et al., RSE 2013 VIIRS Global Ocean Color Imager IDPS Lee et al., RSE 2010 (Jackson et al., JGR 2013) Myungje Choi et al., AMTD (Liu et al., JGR 2014) Himawari-8 MODIS-like Levy et al., AMT 2015 Nighttime AOD retrieval NOAA NDA-Enterprise VIIRS DNB: McHardy et al. AMT 2015 Liu et al. JGR 2016 More on this later! And many more! U.S. Naval Research Laboratory

Aerosol Data Products – Lots of Them! Polar MODIS Geostationary Dark Target GOES Levy et al., AMT 2013 GASP Deep Blue Prados et al., JGR 2007 Sayer et al., JGR 2013 Korea COMS MAIAC Meteorological Imager Lyapustin et al., JGR 2011 Mijin et al., RSE 2013 VIIRS Global Ocean Color Imager IDPS Lee et al., RSE 2010 (Jackson et al., JGR 2013) Myungje Choi et al., AMTD (Liu et al., JGR 2014) Himawari-8 MODIS-like Levy et al., AMT 2015 Nighttime AOD retrieval NOAA NDA-Enterprise VIIRS DNB: McHardy et al. AMT 2015 Liu et al. JGR 2016 More on this later! And many more! We cannot hope to transition all of these products to our operational data assimilation system! Is there some way we can predict the forecast impact of each new product? U.S. Naval Research Laboratory

Forecast Data Impact Study: Zhang et al., JGR 2014 Ocean-only, Terra only Land+OceanTerra+Aqua NAAPS vs AERONET RMSE Forecast Length (hours) U.S. Naval Research Laboratory

More Data, Better Forecast: Some Follow-up Questions Why does forecast improvement not scale with data volume? Why does the forecast skill not degrade smoothly? More Coverage! (+DB+MISR) Can we predict the impact of added observations? U.S. Naval Research Laboratory

Using Terra+Aqua buys nearly 12 hours improvement in T-S-L-O Using Time-Since-Last-Observation gives linear impact of additional data Using Terra+Aqua buys nearly 12 hours improvement in T-S-L-O Terra+Aqua forecast errors fall very close to estimate based on Aqua only U.S. Naval Research Laboratory

VIIRS Enterprise AOD can add very high observation volume NRL/UND MODIS Level 3 VIIRS NDA ‘FullQA’ Fraction of Days with Assimilation Data (May-June-July 2015) Comparison for May-June-July 2015 MODIS Collection 5 processed to NRL/UND L3 Data Assimilation Product VIIRS Enterprise AOD processed using in-granule QA + Textural Filtering U.S. Naval Research Laboratory

NOAA Enterprise AOD vs IDPS VIIRS Aerosol EDR 1 3 2 IDPS Mean AOD difference (VIIRS-MODIS) 3-month comparison to MODIS NRL/UND L3 Data Assimilation product: 201505-201507 VIIRS data aggregated and filtered ‘FullQA’ + buddy checks and neighborhood tests Left: map of AOD differences (paired) (smoothed for plotting) Right: scatter-density plot of AOD differences vs MODIS U.S. Naval Research Laboratory

NOAA Enterprise AOD vs IDPS VIIRS Aerosol EDR 3 1 2 Enterprise Mean AOD difference (VIIRS-MODIS) VIIRS data aggregated and filtered ‘FullQA’ + buddy checks and neighborhood tests 3-month comparison to MODIS NRL/UND L3 Data Assimilation product: 201505-201507 Left: map of AOD differences (paired) (smoothed for plotting) Right: scatter-density plot of AOD differences vs MODIS Reduced bias over open ocean Reduced bias over land Inclusions of high AOD values (excluded from IDPS product) Data assimilation testing of new Enterprise product is underway at NRL U.S. Naval Research Laboratory

VIIRS Enterprise Product shows good agreement with AERONET VIIRS NDA ‘FullQA’ NRL/UND MODIS Level 3 Comparison for May-June-July 2015 Gridded comparisons to global AERONET L2.0 See Liu et al. JGR 2016 for L2 detailed comparisons to AERONET U.S. Naval Research Laboratory

VIIRS Enterprise AOD product is a high-quality AOD dataset Conclusions Navy aerosol applications require high-quality datasets in near-real-time Aerosol forecasts are data-limited: additional high- quality data needed to maximize forecast skill VIIRS Enterprise AOD product is a high-quality AOD dataset Compares well with NRL/UND L3 MODIS currently assimilated Compares well with ‘gold standard’ AERONET AOD NRL is currently testing forecast impact of NOAA Enterprise AOD product U.S. Naval Research Laboratory

Sponsors: Thank You! NRL: U. North Dakota: Jeff Reid Doug Westphal Peng Lynch Arunas Kuciauskas U. North Dakota: Jianglong Zhang Yingxi Shi (now at NASA-GSFC) Ted McHardy Sponsors: U.S. Naval Research Laboratory

Extra Slides U.S. Naval Research Laboratory

We know the location and time of all our assimilated observations MODIS orbit (sunlit node only) dictates patterns of data availability U.S. Naval Research Laboratory

We know the location and time of all our verification data These spatial differences will affect the distribution of AODs used for verification (land vs. ocean, polluted vs clean) U.S. Naval Research Laboratory

Prognostic Error Model: MODIS vs Enterprise VIIRS Satellite Retrieved AOD (Prognostic) U.S. Naval Research Laboratory

VIIRS Enterprise “OCEAN” vs MODIS L3 U.S. Naval Research Laboratory

VIIRS Enterprise “LAND-SW” vs MODIS L3 U.S. Naval Research Laboratory

VIIRS Enterprise “LAND-SWIR” vs MODIS L3 U.S. Naval Research Laboratory

VIIRS Enterprise “LAND-BRIGHT” vs MODIS L3 U.S. Naval Research Laboratory

VIIRS Enterprise vs MODIS: Smoke Box U.S. Naval Research Laboratory

VIIRS Enterprise vs MODIS: Dust Box U.S. Naval Research Laboratory

VIIRS Enterprise vs MODIS: Boreal Fire Smoke U.S. Naval Research Laboratory