The 2020 Blue Book, by list of authors

01.Assimilation of atmospheric and land observations. Data impact and sensitivity studies. Methodological advances
Author(s)Paper titleCountry
H.B. de Azevedo, L.G.G.Goncalves, E.Kalnay, M.WespetalDynamically Weighted Hybrid Gain Data AssimilationBrazil
T. Fujita, H. Seko, T. Kawabata, Y. Ikuta, K. Sawada, D. Hotta, M. KuniiVariational Data Assimilation with Spatial and Temporal Observation Error Correlations of Doppler Radar Radial WindsJapan
Y. Ikuta, H. Kusabiraki, K. Kawano, T. Anzai, M. Sawada, M. Ujiie, S. Nishimoto, Y. Ota, M. NaritaA New Data Assimilation System and Upgrading of Physical Processes in JMA's Meso-scale NWP SystemJapan
T. Kadowaki, Y. Ota, S. YokotaIntroduction of a new hybrid data assimilation system for the JMA Global Spectral ModelJapan
H.C. Lee, D. Behringer, D. KleistA Traceable Observing System Experiment in NCEP GODASUS
H.Liu, A. Collard, J. Jung, D. KleistClear-Sky Radiance (CSR) Assimilation from Geostationary Infrared Imagers at NCEPUS
K.OchiPreliminary results of soil moisture data assimilation into JMA Global AnalysisJapan
I.OkabeOperational use of GOES-16 clear-sky radiance (CSR) data in JMA’s global NWP systemJapan
H. Seko, Y. ShojiImpact of data assimilation of shipborne GNSS data on rainfall forecast (Part 2)Japan
H. Shimizu, M. Kazumori, T. KadowakiImplementation of all-sky microwave radiance assimilation into JMA's global NWP systemJapan

02.Data sets, diagnostic and dynamical investigations, statistical post-processing, reanalysis,and associated studies
Author(s)Paper titleCountry
O. Aldukhov, I. ChernykhFirst and second-order trends of air temperature at the surface level from global radiosonde dataRussia
G.Alekseev, A. Pnyushkov, A. Smirnov, A. Vyazilova, N. GlokInfluence of Atlantic inflow on freshwater content in the Arctic OceanRussia
I. Chernykh, O. AldukhovSpatiotemporal distributions of global trends of humidity and temperature in low troposphereRussia
M. Li, D. Luo, I. Simmonds, A. Dai, L. Zhong, Y. YaoThe associations of winter Atlantic SST, Arctic sea ice, and East Asian surface temperatureAustralia
I.I. Mokhov, D.A. SmirnovEstimates of the contribution of key natural modes and anthropogenic forcing to global surface temperature trend at different temporal horizonsRussia
I.I. Mokhov, V.P. Yushkov, A.V. Timazhev, B.A. BabanovStrong squalls in Moscow region in 2017 and 2018Russia
I.I. Mokhov, A.G. PoroshenkoTropical cyclones in the Western North Pacific Ocean: Changes of their total action during past decadesRussia
U. Prokhorova, A. UrazgildeevaEffect from polynyas in the Siberian Arctic seas to atmospheric transport of heat and moistureRussia
A. V. Smirnov, A. V. Muravev, D. B. KiktevCombining precipitation fields on the basis of radar data and mesoscale model output products in nowcasting systems of Hydrometcenter of RussiaRussia
A. Vyazilova, G. Alekseev, N. Kharlanenkova, N. GlokImpact of global warming on the Siberian rivers runoffRussia

03.Computational studies including new techniques, parallel processing, GPUs. Effects of model resolution
Author(s)Paper titleCountry
K. ArakiNumerical Simulation of Heavy Rainfall Event Associated with Typhoon Hagibis (2019) with Different Horizontal ResolutionsJapan
J. Wang, J. Whitaker, E. Hartnett, J. Abeles, G. Theurich, W. Meng, C. Martin, J.H. Alves, F. Yang, A. ChawlaComputational Performance Improvements in GFSv16US

04.Parameterization of atmospheric and surface processes, effects of different physical parameterizations
Author(s)Paper titleCountry
K. ArakiNumerical Simulation of Potential Impact of Aerosols on Heavy Rainfall Event Associated with Typhoon Hagibis (2019)Japan
T. Komori, S. Hirahara, R. SekiguchiImproved representation of convective moistening in JMA’s next-generation coupled seasonal prediction systemJapan
P. Marquet, P. BechtoldA new Estimated Inversion Strength (EIS) based on the moist-air entropy.France
C. Matsukawa, H. Yonehara, T. KanehamaEvaluation of revised gravity wave parametrizations using statistics of first-guess departuresJapan
I.I. Mokhov, A.G. PoroshenkoRelationship between intensity and duration of tropical cyclonesRussia
W. Wang, L. Zhu, H.S. Kim, D. Iredell, K. Wu, B. Liu, Z. Zhang, A. Mehra, V. TallapragadaTesting a New Horizontal Mixing-length Formulation in HMONUS
W. Zheng, J. Han, J. Kain, G. Manikin, R. Sun, F. Yang, V. TallapragadaAnalysis and Mitigation of Occasional Precipitation-Type Problems in NCEP Global Forecast SystemUS
H. Zhu, A. Protat,C. FranklinKurnell Storm (2015) simulations with high resolution UMAustralia

05.Development of and studies with regional and convective-scale atmospheric models and ensembles
Author(s)Paper titleCountry
J. Dong, B. Liu, Z. Zhang, W. Wang, L. Zhu, C. Zhang, K. Wu, A. Hazelton, X. Zhang, A. Mehra, V. TallapragadaHurricane Analysis and Forecast System (HAFS) Stand-alone Regional (SAR) Model: Real-time Experiments for 2019 North Atlantic Hurricane SeasonUS
A.Hashimoto, S. HayashiNumerical simulations of the cloud and precipitation processes during the heavy rainfall events of early July 2017 and 2018 in JapanJapan
A.Hashimoto, M.Niwano, H.Fujinami, A.Sakai, K.FujitaNumerical simulation of the seasonal precipitation amount over the Himalayan mountain region using the JMA-NHMJapan
M. Kaur, A. K. Sahai, R. Phani, S. JosephSuper-Cyclone Amphan (2020) : Global versus Regional Ensemble PredictionIndia
J. Wang, R. Kotamarthi,W. ChangConvection-permitting scale simulations reduce precipitation bias over North AmericaUSA
J. McQueen, P. Lee, I. Stajner, J. Huang, H.C. Huang, L. PanNOAA’s National Air Quality Forecast Capability for Ozone and Fine Particulate MatterUS

06.Developments in global forecast models, case studies, predictability investigations, global ensembles
Author(s)Paper titleCountry
E.Bazile, N. Azouz, A. Napoly, C. LooImpact of the 1D sea-ice model GELATO in the global model ARPEGE.France
Z.N. BegumInvestigations of the International Experiments, GAME and I-STEP and the Global Atmospheric Model FindingsIndia
P. Bhattacharjee, L. Pan, B. Baker, K. Zhang, R. Montuoro, G. Grell, S. McKeen, J. McQueenPreliminary Evaluation of NOAA’s GEFS-Aerosol ModelUS
I.I. Mokhov, A.V. TimazhevClimate anomalies in the North Eurasian regions: predictability for different El-Nino conditionsRussia
I.I. MokhovWarm and cold winters in the North Eurasian regions: Assessment of El-Niño effectsRussia
N.Otsuka,R.Sekiguchi,T.Komori,T.TanakaEffects of stratospheric volcanic aerosols on S2S prediction skillJapan
T. Takakura, T. KomoriTwo-tiered sea surface temperature approach implemented to JMA’s Global Ensemble Prediction SystemJapan
H.Yamaguchi, M.Ikegami, K.Ochi, Y.Ota, R.Sekiguchi, T.TakakuraUpgrade of JMA's Global Ensemble Prediction SystemJapan
H.Yonehara, C. Matsukawa, T. Nabetani, T. Kanehama, T.Tokuhiro, K. Yamada, R. Nagasawa, Y. Adachi, R. SekiguchiUpgrade of JMA’s Operational Global ModelJapan

07.Global and regional climate models, sensitivity and impact experiments, response to external forcing, monthly and seasonal forecasting
Author(s)Paper titleCountry
J.Chiba, T.KomoriImproved representation of super-cooled liquid water cloud in JMA’s next-generation coupled seasonal prediction systemJapan
S.Denisov, M.ArzhanovUncertainty of modeled wetland area and methane emissions from HBL due to climatic noiseRussia
A. Gavrikov, S. K. Gulev, M. Markina, N. Tilinina, P. Verezemskaya, B. Barnier, A. Dufour, O. Zolina, Y. Zyulyaeva, M. Krinitsky, I. Okhlopkov, A. SokovLong-Term High-Resolution North Atlantic Atmospheric Hindcast for Multipurpose ApplicationsRussia
H. Kawai, T. Koshiro, S. YukimotoRelationship between shortwave radiation bias over the Southern Ocean and the ITCZ in MRI-ESM2Japan
H. Kawai, T. KoshiroDoes Radiative Cooling of Stratocumulus Strengthen Summertime Subtropical Highs?Japan
T. Koshiro, H. Kawai, S. YukimotoImpact of cloud microphysics parameter on 20th century warming simulated in MRI-CGCM3Japan
S. K. Mandke, A. PrabhuFuture projection of Indian summer monsoon variability under climate change scenario: Results from CMIP5/CCSM4 model simulationIndia
I.I. Mokhov, A.V. TimazhevAtmospheric temperature stratification in dependence on the annual cycle length: Numerical experiments with climate model of general circulationRussia
A. Prabhu, S. K. MandkeSpatial features of snow over Eurasia and precipitation over India in the warming scenarios: CCSM4 model projections from CMIP5India

08.Development of and advances in ocean, sea-ice, and wave modelling and data assimilation
Author(s)Paper titleCountry
S. Flampouris, M. De Pondeca, R. Padilla, J. CarleyUpgrades to the NCEP's Real-Time and UnRestricted Mesoscale Analysis Systems for the Significant Wave HeightUS
Z. Garraffo, J.A. Cummings, S. Paturi, Y. Hao, D. Iredell, T. Spindler, B. Balasubramanian, I. Rivin, H.C. Kim, A. MehraRTOFS-DA: Real Time Ocean-Sea Ice Coupled Three Dimensional Variational Global Data Assimilative Ocean Forecast SystemUS
J. Kim, G. Vernieres, S. FlampourisOverview of Sea Ice Data Assimilation Activities and System Development at NOAA-NCEPUS
F.A.Pogarskiy, I.I.MokhovChanges of sea waves characteristics in the Arctic basin from model simulations for the 21st centuryRussia
V.N. Stepanov, Yu.D. ResnyanskiiCovariance functions in multivariate assimilation system with ensemble Kalman filterRussia

09.Development of and studies with coupled and Earth system models and data assimilation systems
Author(s)Paper titleCountry
J. Meixner, L. Stefanova, D. Worthen, Jiande Wang, Jun Wang, S. Moorthi, B. Li, J. Kuang, R. Grumbine, A. Chawla, A. MehraModel Development of the Unified Forecast System for Subseasonal to Seasonal TimescalesUS
A. Prabhu, S. K. MandkeRelation between Eurasian snow and India monsoon in historical simulation of CMIP5 modelsIndia
A. WadaAtmosphere-wave-ocean coupled-model simulation on Typhoon Bualoi(2019) and formation of quasi-linear convective system around Boso PeninsulaJapan
A. Wada, H. Yoshimura, M. NakagawaThe effect of the cloud-water conversion rate in the cumulus parameterization on the simulation of Typhoon Lionrock (2016)Japan
A. WadaRainfall simulations of Typhoons Kammuri and Phanfone landfalling in the PhilippinesJapan
A. WadaSensitivity experiments on axisymmetrization of Typhoon Faxai (2019) just before landfalling in Japan simulated by atmosphere-ocean coupled modelJapan
A. WadaAtmosphere-wave-ocean coupled-model simulation on rapid intensification of Typhoon Hagibis (2019)Japan
A. Wada, K. OkamotoAtmosphere-wave-ocean coupled-model simulation on the effect of Himawari-8 all-sky infrared radiances assimilation on the track simulation of Typhoon Jongdari (2018)Japan

10.Forecast verification: methods and studies
Author(s)Paper titleCountry
R. Danielson, W. A. Perrie, M. ZhangAn update on linear regression and error correlation: Exploration of baseline climate change impacts on Arctic and North Atlantic fogCanada Mattos, L. F. Sapucci, C. F. Bastarz, A. Frassoni, W. Santos, A. CarrascoSCANTEC: A Community System for Evaluation of Numerical Weather and Climate Prediction ModelsBrazil
L. Stefanova, J. Meixner, A. Mehra, P. Bhattacharjee, R. Grumbine, B. Li, S. Moorthi, Jiande Wang, D. WorthenVerification of the NCEP/EMC Unified Forecast System for Subseasonal to Seasonal TimescalesUS
W. Wang, B. Liu, Z. Zhang, L. Zhu, A. Mehra, V. TallapragadaTen-year Performance of HWRF Model in RI Forecasts -- A New MetricUS
Z. Zhang, J. Zhang, K. Wu, G. Alaka, A. Mehra, V. TallapragadaA Statistical Analysis of High Frequency Track and Intensity Forecasts from NOAA’s Operational Hurricane Weather Research and Forecast (HWRF) Modeling SystemUS