The 2021 Blue Book, by list of authors

01.Assimilation of atmospheric and land observations. Data impact and sensitivity studies. Methodological advances

Author(s)	Paper title	Country	Pages
Ph.L.Bykov	Optimal interpolation of inhomogeneous fields using neural networks	Russia	1-03
A.Cheng, F.Yang	Replacing OPAC with MERRA2 Aerosols for the UFS	USA	1-05
T.Elless, X.Wu, V.Tallapragada	Identifying Atmospheric River Reconnaissance Targets Using Ensemble Forecasts	USA	1-07
K.Nonaka, S.Koyamatsu	Operational Use of GOES-16 Atmospheric Motion Vector (AMV) and ScatSat-1/OSCAT Data in JMA’s Global NWP System	Japan	1-09
I.Okabe	Operational use of Himawari-8 CSR data of band 9 and 10 in JMA’s local NWP system	Japan	1-11
R.J.Purser, M.Rancic, M.Pondeca	Multigrid Beta Filter Scheme for Modeling Background Error Covariance in 3DRTMA	USA	1-13
M.Rancic, R.J.Purser, M.Pondeca	Plans to Estimate Adaptive Covariance Parameters Using a Neural Network	USA	1-15
Z.Sassi, N.Fourrié, C.Birman, V.Guidard	Assimilation of satellite derived surface temperature over land in AROME-France model	France	1-17
K. Sawada, Y. Honda	Effect of supersaturation constraint in a variational data assimilation system	Japan	1-19
K.Wu, X.Wu, V.Tallapragada	A New Atmospheric River Quantification Metric	USA	1-21
X.Wu, V.Tallapragada, S.Lord, K.Wu, M.Ralph	Impact of Atmospheric River Reconnaissance Dropsonde Data on NCEP GFS Forecast: A Case Study	USA	1-23
Y.Xia, H.Wei, M.D.Gaines, J.Meng, G.Gayno, H.Lei, R.Yang, Y.Wu, F.Yang, M.Barlage, D.T.Kleist, V.Tallapragada	Preliminary Comparison and Evaluation of Soil Moisture Produced in the NCEP Global Land Data Assimilation System (GLDAS)	USA	1-25
S.Yokota, T.Kadowaki, M.Oda, Y.Ota	Improving ensemble-based background error covariances of the hybrid 4DVar in JMA’s global analysis	Japan	1-27

02.Data sets, diagnostic and dynamical investigations, statistical post-processing, reanalysis,and associated studies

Author(s)	Paper title	Country	Pages
O.A. Aldukhov, I.V. Chernykh	Spatiotemporal distributions of Global trends of water vapour amount in the atmospheric layer 0-30 km	Russia	2-03
O.A. Aldukhov, I.V. Chernykh	First and second-order trends of wind speed in the atmospheric layer 0-30 km on base of global aerological datasets	Russia	2-05
I. Chernykh, O. Aldukhov	Trends of the number of cloud layers	Russia	2-07
R. Danielson	A distance correlation ratio of predictable components	Canada	2-09
R.Honnert, R.El Kathib	First and second derivatives for future use in AROME physics	France	2-11
S. Mandke	Some aspects of the weak rainfall spells of the Indian summer monsoon 2018	India	2-13
I.I.Mokhov, N.N.Medvedev	Changes of the El Niño quasi-cyclic dynamics from the analysis of phase portraits	Russia	2-15
I.I.Mokhov, A.V. Timazhev	Integral index of blocking activity in the atmosphere of Northern Hemisphere during last decades	Russia	2-17
I.I.Mokhov, D.A.Smirnov	Sensitivity of the surface air temperature in different NH latitudes to changes in anthropogenic forcing and natural climate modes	Russia	2-19
A.G. Poroshenko, M.G. Akperov, I.I. Mokhov	Polar mesocyclones and their variability from STARS data	Russia	2-21
A. Prabhu, S. K. Mandke	Relation of Eurasian snow with regional India summer monsoon rainfall	India	2-23
A. Shishov	A comparison of deep convection detection algorithms based on thresholding techniques applied to Meteosat-11 satellite data for European Russia	Russia	2-25
A.V. Timazhev, I.I. Mokhov	Heat and cold waves formation in association with atmospheric blockings in the Northern Hemisphere	Russia	2-27

03.Computational studies including new techniques, parallel processing, GPUs. Effects of model resolution

Author(s)	Paper title	Country	Pages
W.Wang, H.S.Kim, L.Zhu, B.Liu, Z.Zhang, A.Mehra, V.Tallapragada	Impact of Nest Domain Size on the Track Forecast of TC Sarai (2019) by HWRF Model	USA	3-03

04.Parameterization of atmospheric and surface processes, effects of different physical parameterizations

Author(s)	Paper title	Country	Pages
J. Chiba, H. Kawai	Improved SST–shortwave radiation feedback using an updated stratocumulus parameterization	Japan	4-03
P.Marquet	Computation of moist-air surface entropy at Mauna Loa.	France	4-05
P.Marquet, A.Bailey	Comparisons of H2O pathways with moist isentropes.	France	4-07
O.Marti, S.Nguyen, P.Braconnot, S.Valcke, F.Lemarié, E.Blayo	Diagnosing the ocean-atmosphere coupling schemes by using a mathematically consistent Schwarz iterative method	France	4-09
I.I.Mokhov, A.G.Poroshenko	Polar Lows: Statistical relationship between size and duration	Russia	4-11
R. Nagasawa	Impact of ice cloud treatment on the OLR in the radiation calculation of JMA global NWP model	Japan	4-13

05.Development of and studies with regional and convective-scale atmospheric models and ensembles

Author(s)	Paper title	Country	Pages
K. Ishii, T. Shimbori, R. Kai, Y. Hasegawa, Y. Hayashi, H.Tsuchiyama	Improvement of volcanic ash cloud prediction in the Tokyo VAAC	Japan	5-03
T.Kakeheta, M.Kunii, K.Kawano, H.Kawada	Upgrade of JMA’s Mesoscale Ensemble Prediction System	Japan	5-05
H.Kusabiraki, Y.Kitamura, M.Sawada, K.Matsubayashi, S.Nishimoto	Increasing Vertical Resolution and Updating Physical Processes in JMA’s Regional NWP System	Japan	5-07
A.Revokatova, M.Nikitin, G.Rivin, I.Rozinkina, A.Nikitin, E.Tatarinovich	Simulation of polar lows over Norwegian and Barents seas using the COSMO-CLM and ICON models for the 2019–2020 cold season	Russia	5-09
G.Rivin, I.Rozinkina, E.Astakhova, D.Blinov, A.Bundel’, N.Chubarova, I.Gorlach, A.Kirsanov, M.Shatunova, D.Alferov, M.Varentsov, T.Samsonov, D.Zakharchenko, Ph.Bykov, J.Khlestova, V.Kopeykin, M.Nikitin, A.Poliukhov, A.Revokatova, E.Tatarinovich	Status System COSMO-Ru and Scientific Projects including Testing of ICON-NWP	Russia	5-11
T. Shimbori, K. Ishii, R. Kai, Y. Hasegawa, Yo. Hayashi, Yu. Hayashi	Renewal of the JMA Atmospheric Transport Model on the Volcanic Ash Advisory and Ash Fall Forecast Distribution System	Japan	5-13

06.Developments in global forecast models, case studies, predictability investigations, global ensembles

Author(s)	Paper title	Country	Pages
Z.N. Begum	Modeling of Chemical Tracer Transport in the Atmospheric Environment and its Impact on the Global Climate	India	6-03
I.I.Mokhov	Associated with Pacific Decadal Oscillation regional natural hazards like Amur River record flood in 2013 and oceanic red tide near Kamchatka Peninsula in 2020	Russia	6-05
I.I. Mokhov	Predictability of seasonal temperature anomalies in the North Eurasian regions in the La Niña conditions	Russia	6-07
M.Ujiie, M.Higuchi, T.Kadowaki, Y.Kuroki, K.Kiyaoka, M.Oda, K.Ochi, R.Sekiguchi, H.Shimizu, S.Yokota, H.Yonehara	Upgrade of JMA’s Operational Global NWP system	Japan	6-09
X.Wu, D.Kleist, V.Tallapragada, F.Yang, J.A.Sippel	Impact of Aircraft High-Density Observations on GFSv16 Tropical Cyclone Forecasts	USA	6-11
H.Yamaguchi, M.Ikegami, T.Iwahira, K.Ochi, R.Sekiguchi, T.Takakura	Upgrade of JMA's Global Ensemble Prediction System	Japan	6-13
X.Zhou, H.M.Juang	The Global Forecast System Model Instability Issue and Potential Solutions	USA	6-15

07.Global and regional climate models, sensitivity and impact experiments, response to external forcing, monthly and seasonal forecasting

Author(s)	Paper title	Country	Pages
M.M.Arzhanov, I.I.Mokhov, M.R.Parfenova	Northern Hemisphere snow cover sensitivity to temperature changes in the CMIP6 model ensemble	Russia	7-03
S.Denisov, I.Mokhov	Effects of natural GHG emissions under climate changes due to anthropogenic scenarios in the 21st century: Model estimates	Russia	7-05
A.V.Eliseev, I.I.Mokhov, M.R.Parfenova	Changes of navigation period at the North Sea Route in the 21st century from the CMIP5 ensemble simulations: Bayesian estimates	Russia	7-07
Vladimir A.Gordin	About some climatic change in Russia	Russia	7-09
S.K. Mandke, A. Prabhu	Eurasian winter snow variability in the future warming scenarios of CCSM4/CMIP5	India	7-11
I.I.Mokhov, A.V.Chernokulsky, A.M. Osipov	Atmospheric centers of action in the Northern and Southern Hemispheres: Tendencies of change in the 21st century from model simulations	Russia	7-13
K.E.Muryshev, A.V.Eliseev, I.I.Mokhov, S.N.Denisov, M.M.Arzhanov, A.V.Timazhev, A.I.Narizhnaya	Influence of climate system nonlinearity on the time lag between changes in global temperature and atmospheric CO2 content	Russia	7-16

08.Development of and advances in ocean, sea-ice, and wave modelling and data assimilation

Author(s)	Paper title	Country	Pages
J.Cummings, Z.Garraffo, D.Iredell, S.Paturi, Y.Hao, T.Spindler, B.Alasubramanian, A.Mehra	Ocean Data Impacts in the Real Time Ocean Forecast System: RTOFS-v2	USA	8-03
J.Kim, Y.C.Teng, G.Vernieres, T.Sluka, S.Paturi, Y.Hao, D.Worthen, B.Li, J.Wang, J.S.Zhu, H.C.Kim, D.Kleist	NOAA-NCEP Next Generation Global Ocean Data Assimilation System (NG-GODAS)	USA	8-05
X.Liu, J.Kim, A.Mehra, D.Kleist, G.Vernieres, H.C.Kim, E.Bayler	Implementation of Ocean Biogeochemical Modeling and Ocean Color Data Assimilation within NOAA/NCEP’s Next-Generation Global Ocean Data Assimilation System (NG-GODAS)	USA	8-07
S.Paturi, Y.Hao, J.Kim	Data Used in Global Ocean Modeling and Data Assimilation Systems at NOAA/NCEP	USA	8-09
B.S.Strukov, Yu.D.Resnyanskii, А.А.Zelenko, V.N.Stepanov	Variability of water and heat exchanges through the Bering Strait in numerical experiments with the NEMO/SI3 model assimilating observational data	Russia	8-11
Y.C.Teng, J.Kim, T.Sluka, D.Kleist	Implementation of Forcing-Bias Correction for the JEDI-Based Next Generation Global Ocean Data Assimilation System (NG-GODAS)	USA	8-13

09.Development of and studies with coupled and Earth system models and data assimilation systems

Author(s)	Paper title	Country	Pages
A.Wada, W. Yanase	Numerical simulations of the rapid weakening of Typhoon Haishen (2020) by a coupled atmosphere-wave ocean model	Japan	9-03
A.Wada	Atmosphere-wave-ocean coupled-model ensemble simulation on rapid intensification of Typhoon Hagibis (2019)	Japan	9-05
A.Wada, W. Yanase	Numerical simulations of Typhoon Haishen by a coupled atmosphere-wave ocean model with two different oceanic initial conditions	Japan	9-07
A.Wada	Rainfall simulations of Typhoon Mangkhut (2018) landfalling in the Philippines	Japan	9-09
J.Wang, D.Worthen, B.Liu, M.Ji, B.Curtis, D.Jovic, D.Heinzeller, L.Pan, S.Moorthi, S.Sun, B.W.Green, M.Vertenstein, A.Craig, G.Theurich, R.Mahajan, A.Chawla	Development of UFS Coupled Model Infrastructure	USA	9-11

10.Forecast verification: methods and studies

Author(s)	Paper title	Country	Pages
B.Casati, E.Mekis, M.Køltzow	Adjustment of wind induced solid precipitation undercatch in operational verification practices	Canada	10-03