Pattanayak, S., Mohanty, U.C., Rizvi, S.R.H., Huang, X.-Y., Gopalakrishnan, S.G., Niyogi, D. 2013. Initialization of WRF-NMM model with WRFDA for simulation of tropical cyclones over the Bay of Bengal. Meteorology and Atmospheric Physics, in preparation.

Zhang, X. and Huang, X.-Y. 2013. Four-dimensional variational data assimilation for WRF: lateral boundary conditions control, precipitation assimilation and computational efficiency improvements. Mon. Wea. Rev., in preparation.

Gao, F., Huang, X.-Y. and Jacobs, N. 2013. Assimilation of wind speed and direction observations: results from real data experiments. Tellus A, in preparation.

Schwartz, C.S., Liu, Z., Huang, X.-Y., Kuo, Y.-H. Comparing limited-area 3DVAR and hybrid variational-ensemble data assimilation methods for typhoon track forecasts: Sensitivity to outer loops and vortex relocation. Mon. Wea. Rev, submitted.

Zhang, Xiaoyan, Huang, X.-Y., Wang, H., Auligne, T., Zhang, Xin, Gao, F., Jacobs, N.A., Childs, P.P. 2013. Evaluation of TAMDAR observation impacts on regional forecast error using the WRFDA-FSO system. Weather and Forecasting, submitted.

Xu, D., Liu, Z., Huang, X.-Y., Min, J., Wang, H. 2013. Impact of assimilating IASI radiance observations on two tropical cyclones. Meteorology and Atmospheric Physics, submitted.

Wang, H., Huang, X.-Y. and Chen Y. 2013. The benefit of the MTG candidate Infra-Red Sounding mission to regional forecasts: An observation system simulation experiment. Advances in Atmospheric Sciences, submitted.

Gao, F., Childs, P.P., Huang, X.-Y., Jacobs, N.A. 2013. An initialization scheme by relocation on tropical cyclone track. Advances in Atmospheric Sciences, under revision.

Chen, Y., Rizvi, S.R.H., Huang, X.-Y., Min, J., and Zhang, X. 2013. Balance characteristics of multivariate background error covariance and their impact on analyses and forecasts in Tropics and Arctic. Meteor. Atmos. Phys., under revision.

Jung, B.-J., Kim, H. M., Auligne, T., Zhang, Xin, Zhang, Xiaoyan, and Huang, X.-Y. 2013. Adjoint-derived observation impact using WRF in the western North Pacific. Mon. Wea. Rev., under revision.

Zhang, X., Huang, X.-Y., Pan, N. 2013. Development of the upgraded tangent linear and adjoint of the weather research and forecasting (WRF) modeling system. Journal of Atmospheric and Oceanic Technology, under revision.

Huang, X.-Y., Gao, F., Jacobs, N. and Wang, H. 2013. Assimilation of wind speed and direction observations: a new formulation and results from idealized experiments. Tellus A, in press.

Wang, H., Sun, J., Zhang, X., Huang, X.-Y. and Auligne, T. 2013. Radar data assimilation with WRF 4D-Var: Part I. System development and preliminary testing. Mon. Wea. Rev., in press.

Wang, H., Sun, J., Fan, S. and Huang, X.-Y. 2013. Indirect assimilation of radar reflectivity with WRF 3D-Var and its impact on prediction of four summertime convective events. J. Appl. Meteor. Climatol., in press.

Gao, F., Zhang, X., Jacobs, N., Huang, X.-Y., Zhang, Xin, Childs, P. 2012. Estimation of TAMDAR Observational Error and Assimilation Experiments. Weather and Forecasting, Vol. 27, No. 4, 856-877.

Barker, D., Huang, X.-Y., Liu, Z., Auligné, T., Zhang, Xin, Rugg, S., Ajjaji, R., Bourgeois, A., Bray, J., Chen, Y., Demirtas, M., Guo, Y.-R., Henderson, T., Huang, W., Lin, H.-C., Michalakes, J., Rizvi, S., Zhang, Xiaoyan, 2012 The Weather Research and Forecasting (WRF) Model's Community Variational/Ensemble Data Assimilation System: WRFDA. Bull. Amer. Meteor. Soc., 93, 831-843.

Wang, H. and Huang, X.-Y. 2012. TAMDAR Observation Assimilation in WRF 3D-Var and its Impact on Hurricane Ike (2008) Forecast. Atmospheric and Oceanic Science Letters., VOL. 5, NO. 3, 206-211.

Chen, M., Huang, X.-Y., Wang, W. 2012. Difficulties in the implementation of the digital filter initialization in a high resolution numerical weather forecast model. Acta Meteorologica Sinica, 70(1), 109-118.

Schwartz, C.S., Liu, Z., Chen, Y. and Huang, X.-Y. 2012. Impact of assimilating microwave radiances with a limited-area ensemble data assimilation system on forecasts of typhoon Morakot. Weather and Forecasting, 27, 424-437.

Gustafsson, N., Huang, X.-Y., Yang, X., Mogensen, K.S., Lindskog, M., Vignes, O., Wilhelmsson, T., Thorsteinsson, S. 2012. Four-dimensional variational data assimilation for a limited area model. Tellus A, 64, 14985, DOI: 10.3402/tellusa.v64i0.14985.

Wang, H., Mu, M., Huang, X.-Y. 2011. Application of Conditional Nonlinear Optimal Perturbation to Tropical Cyclone Adaptive Observation using the Weather Research Forecasting (WRF) model. Tellus A, 63, 939-957.

Zhang, M., Zhang, F., Huang, X.-Y. and Zhang, X. 2011. Inter-comparison of an ensemble Kalman filter with three- and four-dimensional variational data assimilation methods in a limited-area model over the month of June 2003. Mon. Wea. Rev., 139, 566-572.

Lynch, P. and X.-Y. Huang. 2010. Initialization. Chapter 9, in Data Assimilation: Making sense of observations, eds. W. Lahoz, B. Khattatov and R. Menard, Springer. ISBN: 978-3-540-74702-4.

Huang, X.-Y., Q. Xiao, D. M. Barker, Xin Zhang, J. Michalakes, W. Huang, T. Henderson, J. Bray, Y. Chen, Z. Ma, J. Dudhia, Y. Guo, Xiaoyan Zhang, D.-J. Won, H.-C. Lin, Y.-H. Kuo, 2009. Four-Dimensional Variational Data Assimilation for WRF: Formulation and Preliminary Results. Mon. Wea. Rev., 137, 299-314.

Fan, S., Guo, Y., Chen, M., Zhong, J. Chu, Y., Wang, W., Huang, X.-Y., Wang, Y, Kuo, Y.-H. 2008. Application of WRF 3D-Var to a high resolution model over Beijing area. Plateau Meteorology, 27, 1181-1188.

Huang, X.-Y., 2008. Book review: "Dynamic Data Assimilation: A Least Square Approach." Bulletin of the American Meteorological Society, 89, 1741.

Xiao, Q., Kuo, Y., Ma, Z., Huang, W., Huang, X., Zhang, X., Barker, D. M., Michalakes, J., 2008. Development of the WRF adjoint modeling system and its application to the investigation of the May 2004 McMurdo Antarctica severe wind event. Mon. Wea. Rev., 136, 3696-3713.

Done, J., X.-Y. Huang and Y.-H. Kuo, 2006. Investigating the relationship between water vapor convergence and severe convection using the Weather Research and Forecasting (WRF) model. Weather and Forecasting, submitted.

Chen, M. and Huang, X.-Y. 2006. Digital Filter Initialization for MM5. Mon. Wea. Rev., 134, 1222-1236.

Du, C.-L., Huang, X.-Y. and Yu X. 2005. Applications of 4-dimentional variational data assimilation to the Lorenz system. Meteorological Monthly, 31, 23-26.

Vedel, H. and Huang, X.-Y. 2004. Impact of ground based GPS data on NWP forecasts. J. Meteorol. Soc. Japan, 82, 459-472.

Vedel, H., Huang, X.-Y., Haase, J., Ge, M. and Calais, E. 2004. Impact of GPS zenith tropospheric delay data on precipitation forecasts in Mediterranean France and Spain. Geophys. Res. Lett., 31, L02102, doi:10.1029/2003GL017715.

Sattler, K. and Huang, X.-Y. 2002. Structure function characteristics for 2 meter temperature and relative humidity in different horizontal resolution. Tellus 54A, 14-33.

Gustafsson, N., Berre, L., Hörnquist, S., Huang, X.-Y., Lindskog, M., Navascues, B., Mogensen, K.S., Thorsteinsson, S. 2001. Three-dimensional variational data assimilation for a limited area model. Part I: General formulation and the background error constraint. Tellus 53A, 425-446.

Lindskog, M., Gustafsson, N., Navascues, B., Mogensen, K.S., Huang, X.-Y., Yang, X., Andrae, U., Berre, L., Thorsteinsson, S., Rantakokko, J. 2001. Three-dimensional variational data assimilation for a limited area model. Part II: Observation handling and assimilation experiments. Tellus 53A, 447-468.

Vedel, H., Mogensen, K.S. and Huang, X.-Y. 2001. Calculation of zenith delays from meteorological data, comparison of NWP model, radiosonde and GPS delays. Physics and Chemistry of the Earth, 26, 497-502.

Huang, X.-Y. 2000. Variational analysis using spatial filters. Mon. Wea. Rev. 128, 2588-2600.

Amstrup, B. and Huang, X.-Y. 1999. Impact of the additional FASTEX radiosonde observations on the HIRLAM data assimilation and forecasting system. Q. J. R. Meteor. Soc. 125, 3359-3374.

Huang, X.-Y. 1999. A generalization of using an adjoint model in intermittent data assimilation systems. Mon. Wea. Rev. 127,766-787.

Yu, X.-D., Huang, X.-Y., Laursen, L., Rasmussen, E. 1997. Application of the HIRLAM system in China - torrential rain forecast experiments in Yangtze river valley. Quarterly Journal of Applied Meteorology, 8, 498-502.

Yu, X.-D., Huang, X.-Y., Laursen, L., Rasmussen, E. 1997. On the sensitivity of precipitation forecasts to the moist physics and the horizontal resolution of numerical model. Acta Meteorologica Sinica, 11, 432-445.

Huang, X.-Y., Gustafsson, N. and Källen, E. 1997. Using an adjoint model to improve an optimum interpolation based data assimilation system. Tellus 49A, 161-176.

Gustafsson, N. and Huang, X.-Y. 1996. Sensitivity experiments with the spectral HIRLAM and its adjoint. Tellus 48A, 501-517.

Huang, X.-Y. 1996. Initialization of cloud water content in a data assimilation system. Mon. Wea. Rev. 124, 478-486.

Huang, X.-Y., Cederskov, A., and Källen, E. 1994. A comparison between digital filtering initialization and nonlinear normal mode initialization in a data assimilation system. Mon. Wea. Rev. 122, 1001-1015.

Lynch, P. and Huang, X.-Y. 1994. Diabatic initialization using recursive filters. Tellus 46A, 583-597.

Huang, X.-Y. and Sundqvist, H. 1993. Initialization of cloud water content and cloud cover for numerical prediction models. Mon. Wea. Rev. 121, 2719-2726.

Huang, X.-Y. and Lynch, P. 1993. Diabatic digital filter initialization: Application to the HIRLAM model. Mon. Wea. Rev. 121, 589-603.

Lynch. P and Huang, X.-Y. 1992. Initialization of the HIRLAM model using a Digital Filter. Mon. Wea. Rev. 120,1019-1034.

Huang, X.-Y. 1990. The organization of moist convection by internal gravity waves. Tellus 42A, 270-285.

Källen, E. and Huang, X.-Y. 1988. The influence of isolated observations on short range numerical weather forecasts. Tellus 40A, 324-336.

Huang, X.-Y. 1988. On the hysteretic behaviour of moist convection. Tellus 40A, 237- 247.

Källen, E. and Huang, X.-Y. 1987. A simple model for large-scale thermohaline convection. Dyn. Atmos. Oceans, 11, 153-173.

Huang, X.-Y. and Källen, E. 1986. A low-order model for moist convection. Tellus 38A, 381-396.

Huang, X.-Y. and Källen, E. 1986. Comments on ``A note on CISK in polar air masses". Tellus 38A, 378-379.

2012

Huang, X.-Y., Zhang, X., Auligne, T., Liu, Z., Rizvi, S., Guo, Y.-R., Ban, J., Liu, J., Descombes, G., Wang, H., Kavulich, M., Li, R., Lin, H.-C., Schwartz, C., Gao, F., Xu, D., Newman, K., Poterjoy, J., Dong, P. 2012. The 2012 WRFDA Overview. 13th WRF Users' Workshop, Boulder, Colorado, 25-29 June 2012. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2012/Extended Abstracts 2012/1_2_Huang_ExtendedAbstract_12.pdf]

Gao, F., X.-Y. Huang, N. Jacobs 2012. The Assimilation of Wind Speed and Direction Based on WRFDA 3D-Var System. 92nd American Meteorological Society Annual Meeting. New Orleans, LA. 22-26 January 2012. [http://ams.confex.com/ams/92Annual/webprogram/Paper196706.html]

Zhang, Xiaoyan, X.-Y. Huang, T. Auligne, Xin Zhang, F. Gao, N. Jacobs, P. Childs. 2012. Evaluation of TAMDAR Data Impact on Forecast Error with WRFDA-FSO System. 92nd American Meteorological Society Annual Meeting. New Orleans, LA. 22-26 January 2012. [http://ams.confex.com/ams/92Annual/webprogram/Paper199032.html]

2011

Huang, X.-Y., Zhang, X., Liu, Z., Auligne, T., Mizzi, A., Wang, H. 2011. The 2011 WRFDA Overview. 12th WRF Users' Workshop, Boulder, Colorado, 20-24 June 2011. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2011/Extended Abstracts 2011/1_2_Huang_ExtendedAbstract_11.pdf]

Huang, X.-Y., Hu, M., Shao, H., Stark, D. 2011. Community Gridpoint Statistical Interpolation (GSI) System and its role in bridging research and operational data assimilation community. 12th WRF Users' Workshop, Boulder, Colorado, 20-24 June 2011. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2011/Extended Abstracts 2011/7B_4_Huang_ExtendedAbstracts_11.pdf]

Wang, H., Sun, J., Huang, X.-Y., Auligne, T. 2011. Indirect assimilation of radar reflectivity with WRFDA-3DVAR and its impact on the prediction of a squall line. 12th WRF Users' Workshop, Boulder, Colorado, 20-24 June 2011. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2011/Extended Abstracts 2011/P57_WangHongli_ExtendedAbstract_11.pdf]

Gao, F., Zhang, Xiaoyan., Huang, X.-Y., Zhang, Xin., Jacobs, N., Childs, P. 2011. Preliminary Results of Directly Assimilating Wind Speed and Direction Based on WRFDA 3D-Var System. 12th WRF Users' Workshop, Boulder, Colorado, 20-24 June 2011. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2011/Extended Abstracts 2011/P58_Gao_ExtendedAbstracts_11.pdf]

Gao, F., Xiaoyan Zhang, X.-Y. Huang, Xin Zhang, P. Childs, N. Jacobs 2011. TAMDAR Data Assimilation and Its Impact on Mesoscale Numerical Forecast. 91st American Meteorological Society Annual Meeting. Seattle, WA. 23-27 January 2011. [http://ams.confex.com/ams/91Annual/webprogram/Paper184190.html]

Mizzi, A.P., Z. Liu, X.-Y. Huang, 2011. A Hybrid GSI/ETKF Data Assimilation Scheme for WRF/ARW. 91st American Meteorological Society Annual Meeting. Seattle, WA. 23-27 January 2011. [http://ams.confex.com/ams/91Annual/webprogram/Paper178723.html]

Newman, K.M., C. Zhou, H. Shao, X.-Y. Huang, M. Hu, 2011. Testing and Evaluation of the GSI Data Assimilation System. 91st American Meteorological Society Annual Meeting. Seattle, WA. 23-27 January 2011. [http://ams.confex.com/ams/91Annual/webprogram/Paper182999.html]

Schwartz, C.S., Z. Liu, Y. Chen, X.-Y. Huang, 2011. Studying Typhoon Morakot with a Coupled WRFDA-DART System. 91st American Meteorological Society Annual Meeting. Seattle, WA. 23-27 January 2011. [http://ams.confex.com/ams/91Annual/webprogram/Paper184579.html]

Zhang, Xiaoyan, X.-Y. Huang, Xin Zhang 2011. Evaluation of WRFDA 4D-VAR through Month-long Run and Case Study. 91st American Meteorological Society Annual Meeting. Seattle, WA. 23-27 January 2011. [http://ams.confex.com/ams/91Annual/webprogram/Paper182450.html]

Zhang, Xin, X.-Y. Huang, N. Pan, Q. Cheng. 2011. Recently upgrades and improvements of WRF 4D-Var system. 91st American Meteorological Society Annual Meeting. Seattle, WA, 23-27 January 2011. [http://ams.confex.com/ams/91Annual/webprogram/Paper182521.html]

2010

Bao Yansong, Xiang-Yu Huang, Jinzhong Min, Xin Zhang, Dongmei Xu 2010. Application Research of radiance data assimilation in precipitation prediction based on WRFDA. 11th WRF Users' Workshop, Boulder, Colorado, 21-25 June 2010. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2010/abstracts/P-07.pdf]

Rizvi, Syed R.H. , Yaodeng Chen, X.-Y. Huang, Jinzhong Min, Xin Zhang. 2010. Multivariate background errors in WRFDA: Impact of additional correlations and its performance in Tropics and Arctic. 11th WRF Users' Workshop, Boulder, Colorado, 21-25 June 2010. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2010/abstracts/P-14.pdf]

Schwartz Craig, Zhiquan Liu, Yongsheng Chen, Xiang-Yu Huang 2010. Studying Typhoon Morakot with a Coupled WRFDA-DART System. 11th WRF Users' Workshop, Boulder, Colorado, 21-25 June 2010. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2010/abstracts/3A-11.pdf]

2009

Huang, X.-Y. 2009. The 2009 WRFDA overview. WMO data assimilation symposium, Melbourne, Australia, 5-9 Oct 2009. [http://www.cawcr.gov.au/staff/pxs/wmoda5/ExtendedAbstracts/Huang.pdf]

Krysta, M., S.R.H. Rizvi, X.-Y. Huang. 2009. A new formulation of WRFDA analysis control variables. 10th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2009. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2009/abstracts/P2A-03.pdf]

Wang, H., X.-Y. Huang, Y. Chen, X. Zhang, D. Stark, P. Childs. 2009. The impact of TAMDAR observations on hurricane Ike (2008) forecast using WRFDA system. 10th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2009. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2009/abstracts/P2A-06.pdf]

Stark, D., X.-Y. Huang, X. Zhang. 2009. Making a single executable version of WRF 4D-Var with ESMF. 10th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2009. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2009/abstracts/P2A-02.pdf]

Shao, H., M. Hu, L. Nance, X.-Y. Huang, J. Derber. 2009. GSI Data Assimilation System: From Operations to the Community. 10th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2009. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2009/abstracts/2A-08.pdf]

Demirtas, M., D. Barkar, Y. Chen, J. Hacker, X.-Y. Huang, X.-Y., C. Shyder, and X. Wang. 2009. A hybrid data assimilation (WRF-Var and Ensemble Transform Kalman Filter) system based retrospective tests. 10th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2009. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2009/abstracts/2A-10.pdf]

Huang, X.-Y. 2009. The 2009 WRFDA updates. 10th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2009. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2009/abstracts/1-03.pdf]

Hui Shao, X. Y. Huang, Z. Liu, T. Auligne, M. Demirtas, S. Rizvi and H. Lin. 2009. Comprehensive test-rig for WRF data assimilation developments at NCAR¿ data assimilation testbed center. 23rd Conference on Weather Analysis and Forecasting/19th Conference on Numerical Weather Prediction, AMS, Omaha, NE. 1-5 June 2009. [http://ams.confex.com/ams/23WAF19NWP/techprogram/paper_153378.htm]

Demirtas, M., D. Barkar, Y. Chen, J. Hacker, X.-Y. Huang, X.-Y., C. Shyder, and X. Wang. 2009. A hybrid data assimilation system (Ensemble transform Kalman filter and WRF-Var) based retrospective tests with real observations. 23rd Conference on Weather Analysis and Forecasting/19th Conference on Numerical Weather Prediction, AMS, Omaha, NE. 1-5 June 2009. [http://ams.confex.com/ams/23WAF19NWP/techprogram/paper_153340.htm]

Childs, P., N. Jacobs, M. Croke, Y. Liu, and X. Y. Huang. 2009. TAMDAR-Related Impacts on the AirDat Operational WRF-ARW as a Function of Data Assimilation Techniques. AMS annual meeting, Phoenix, Arizona. 11-16 Jan 2009. [http://ams.confex.com/ams/89annual/techprogram/paper_147976.htm]

Jacobs, N., P. Childs, M. Croke, Y. Liu, and X. Y. Huang. 2009. The Optimization Between TAMDAR Data Assimilation Methods and Model Configuration in WRF-ARW. AMS annual meeting, Phoenix, Arizona. 11-16 Jan 2009. [http://ams.confex.com/ams/89annual/techprogram/paper_147927.htm]

Masutani, M., R. M. Errico, J. S. Woollen, Y. Xie, T. Zhu, N. Prive, R. Yang, H. Sun, A. Da Silva, C. Hill, Y. Song, S. Greco, S. A. Wood, E. Andersson, T. Jung, L. P. Riishojgaard, F. Weng, O. Reale, T. W. Schlatter, V. Anantharaj, P. J. Fitzpatrick, A. Stoffelen, G. J. Marseille, G. D. Emmitt, S. Lord, Y. Sato, M. Hu, S. S. Weygandt, M. J. McGill, D. Devenyi, T. J. Kleespies, E. Liu, M. Sienkiewicz, D. Groff, D. T. Kleist, K. Fielding, H. Pryor, E. Salmon, M. W. Govett, X. Fan, E. Brin, Z. Pu, L. Cucurull, Z. Toth, T. Miyoshi, T. Enomoto, M. Watanabe, H. Koyama, Y. Rochen, M. Seablom, B. Hauss, R. Burns, G. Higgins, H. Wang, Y. Chen, and X. Y. Huang. 2009. Expanding cplaboration in Joint OSSEs. AMS annual meeting, Phoenix, Arizona. 11-16 Jan 2009. [http://ams.confex.com/ams/89annual/techprogram/paper_149645.htm]

2008

Huang, Xiang-Yu, Hongli Wang, Yongsheng Chen, Xin Zhang, Stephen A. Tjemkes, Rolf Stuhlmann. 2008. Benefit of the MTG candidate Infra-Red Sounding mission to regional forecast. Report TN-4: Final results review. EUMETSAT project.

Sun, Juanzhen, Yongrun Guo, Eunha Lim, Xiang-Yu Huang, Qingnong Xiao and Soichiro Sugimoto. 2008. Assimilation and Forecasting Experiments Using Radar Observations and WRF 4D-Var. THE FIFTH EUROPEAN CONFERENCE ON RADAR IN METEOROLOGY AND HYDROLOGY. Helsinki, Finland. 30 June - 4 July 2008. [http://erad2008.fmi.fi/proceedings/extended/erad2008-0099-extended.pdf]

Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, M. Duda, X.-Y. Huang, W. Wang and J. G. Powers, 2008. A Description of the Advanced Research WRF Version 3. NCAR Technical Note, NCAR/TN-475+STR. [http://www.mmm.ucar.edu/wrf/users/docs/ARW_v3.pdf]

Peckham, Steven, Tanya Smirnova, Stan Benjamin, John Brown, Xiang-Yu Huang, Min Chen, and Michael Duda. 2008. Implementation and testing of WRF DFI. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/1-03.pdf]

Huang, X.-Y., Hui Shao, Meral Demirtas, Zhiquan Liu, Rizvi Syed, Thomas Auligne and Dale Barker. 2008. APPLICATIONS OF WRF DATA ASSIMILATION SYSTEM AT THE NCAR DATA ASSIMILATION TESTBED CENTER (DATC). 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/5-06.pdf]

Liu, Zhiquan, Tom Auligne, Hui-Chuan Lin, Dale Barker, Xiaoyan Zhang, Xin Zhang, Hui Shao and Xiang-Yu Huang and Dongliang Wang. 2008. RADIANCE DATA ASSIMILATION FOR WRF MODEL: OVERVIEW AND RESULTS. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P5-01.pdf]

Rizvi, Syed, Y.-R Guo, H. Shao, M. Demirtas and X.-Y. Huang. 2008. IMPACT OF OUTER LOOP FOR WRF DATA ASSIMILATION SYSTEM (WRFDA). 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P5-03.pdf]

Shao, Hui, Zhiquan Liu, Thomas Auligne, Dale Barker, Jordan Powers and Xiang-Yu Huang. 2008. IMPACT STUDIES OF SATELLITE OBSERVATIONS IN THE ANTARCTIC MESOSCALE PREDICTION SYSTEM: AMSU-A RADIANCE MEASUREMENTS. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P5-04.pdf]

Guo, Y.-R., J. Sun, E. Lim, X.-Y. Huang, and X. Zhang, and S. Sugimoto. 2008. ASSIMILATION OF DOPPLER RADAR DATA WITH WRF 4D-VAR FOR A CONVECTIVE CASE. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P5-06.pdf]

Ratna, K. Naga, Ming Hu, Xiang-Yu Huang, and S.R. Rizvi and S. Pattnayak. 2008. IMPACT OF THE GSI DATA ASSIMILATION ON WRF-NMM FORECAST OF TROPICAL CYCLONES OVER NORTH INDIAN OCEAN. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P5-07.pdf]

Huang, Xiang-Yu, Hongli Wang, Yongsheng Chen, Xin Zhang, Stephen A. Tjemkes, and Rolf Stuhlmann. 2008. AN OBSERVING SYSTEM SIMULATION EXPERIMENT (OSSE) FOR METEOSAT THIRD GENERATION INFRA-RED SOUNDING RETRIEVALS USING BOTH MM5 AND WRF. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P5-12.pdf]

Bromwich, David. H., Dale M. Barker, John E. Walsh, Mark C. Serreze, Ying-Hwa Kuo, and Fei Chen, Keith M. Hines, Le-Sheng Bai, and Sheng-Hung Wang, Andrew G. Slater, William L. Chapman, Hans Huang, and Michael Barlage, Tae-Kwon Wee, Paul R. Berger, and Lin Li. 2008. A MULTI-YEAR ARCTIC SYSTEM REANALYSIS. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P6-07.pdf]

Pattanayak, S., U. C. Mohanty, S. R. Rizvi, and X.-Y. Huang and K. Naga Ratna. 2008. A COMPARATIVE STUDY ON PERFORMANCE OF MM5 AND WRF (ARW & NMM) MODELS IN SIMULATION OF TROPICAL CYCLONE OVER BAY OF BENGAL. 9th WRF Users' Workshop, Boulder, Colorado, 23-27 June 2008. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2008/abstracts/P8-04.pdf]

2007

Huang, X.-Y., Q. Xiao, Xin Zhang, J. Michalakes, W. Huang, D.M. Barker, J. Bray, Z. Ma, T. Henderson, J. Dudhia, Xiaoyan Zhang, D.-J. Won, Y. Chen, Y.-R. Guo, H.C. Lin, Y.-H. Kuo. 2007. 4-Dimensional Variational Data Assimilation for the Weather Research and Forecasting Model. 22nd Conference on Weather Analysis and Forecasting/18th Conference on Numerical Weather Prediction, Park City, Utah, 25-29 June 2007. [http://ams.confex.com/ams/pdfpapers/123878.pdf]

Barker, D.M., J. R. Bray, M. Demirtas, H. Huang, Z. Liu, H. Shao, Q. Xiao, 2007. Overview of recent developments and results from WRF-Var. 8th WRF Users' Workshop, Boulder, Colorado, June 11-15, 2007. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2007/abstracts/1-2_Barker.pdf]

Guo, Y.-R., S.-Y. Fan, W. Wang, M. Chen, X.-Y. Huang, Y.-C. Wang, and Y.-H. Kuo, 2007. Application of WRFVar (3DVar) to a High Resolution (3-km) Model over Beijing Area. 8th WRF Users' Workshop, Boulder, Colorado, June 11-15, 2007. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2007/abstracts/p2-5_Guo.pdf]

Huang, X.-Y., Q. Xiao, Xin Zhang, J. Michalakes, W. Huang, D.M. Barker, J. Bray, Z. Ma, T. Henderson, J. Dudhia, Xiaoyan Zhang, D.-J. Won, Y. Chen, Y.-R. Guo, H.C. Lin, Y.-H. Kuo. 2007. Status of WRF 4D-Var. 8th WRF Users' Workshop, Boulder, Colorado, June 11-15, 2007. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2007/abstracts/4-1_Huang.pdf]

Huang, X.-Y., H. Wang, Y. Chen, X. Zhang, S.A. Tjemkes, R. Stuhlmann, 2007. An observing system simulation experiment using both MM5 and WRF: experiment configuration and preliminary results. 8th WRF Users' Workshop, Boulder, Colorado, June 11-15, 2007. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2007/abstracts/p2-2_Huang.pdf]

Huang, X.-Y., M. Chen, J.-W. Kim, B. Skamarock, and T. Henderson, 2007. Development of Digital Filter Initialization for WRF and its implementation at IUM. 8th WRF Users' Workshop, Boulder, Colorado, June 11-15, 2007. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2007/abstracts/p5-4_Huang.pdf]

2006

Huang, X.-Y., Q. Xiao, W. Huang, D. M Barker, J. Michalakes, J. Bray, Z. Ma, Y.-R. Guo, H.-C. Lin, and Y.-H. Kuo, 2006. Preliminary results of WRF 4D-Var. WRF users' workshop, Boulder, Colorado, 19-22 June 2006. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2006/abstracts/Session04/4_5_Huang.pdf]

Guo, Y.-R., H.-C. Lin, X.X. Ma, X.-Y. Huang, C.T. Terng and Y.-H. Kuo, 2006: Impact of WRF-Var (3DVar) background error statistics on typhoon analysis and forecast. WRF users' workshop, Boulder, Colorado, 19-22 June 2006. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2006/abstracts/PSession04/P4_2_Guo.pdf]

Xiao, Q., J. Sun, W.-C. Lee, E. Lim, S. Sugimoto, J. Gu, X. Zhang, Y.R. Guo, D. M Barker, X.-Y. Huang, and Y.-H. Kuo, 2006: Doppler radar data assimilation with WRF-Var: current status and future plan. WRF users' workshop, Boulder, Colorado, 19-22 June 2006. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2006/abstracts/PSession04/P4_7_Xiao.pdf]

Barker, D.M., J. Bray, Y.-R. Guo, X.-Y. Huang, Z. Liu, S. Rizvi, Q.-N. Xiao, 2006. Status Report on WRF-ARW’s Variational Data Assimilation System (WRF-Var). WRF users' workshop, Boulder, Colorado, 19-22 June 2006. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2006/abstracts/Session04/4_1_Barker.pdf]

2005

Done, J., X.-Y. Huang and Y.-H. Kuo, 2005. Investigating the relationship between water vapor convergence and severe convection using the WRF model at 1km resolution. AMS 11th Conference on Mesoscale Processes, 24-29th Oct 2005, Albuquerque, NM.

Huang, X.-Y., Y.-H. Kuo, J. Done, 2005. Potential of Meteosat Third Generation to Detect Water Vapour Convergence Linked to Severe Convection. [http://www.eumetsat.int/groups/pps/documents/document/pdf_mtg_rep19.pdf]

Huang, X.-Y., Q. Xiao, W. Huang, D. M Barker, Y.-H. Kuo, J. Michalakes, and Z. Ma, 2005. The Weather Research and Forecasting Model Based 4-dimensional Variational Data Assimilation System. WRF/MM5 users' workshop, Boulder, Colorado, 27-29 June 2005. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2005/abstracts/Session10/5-Huang.pdf]

Xiao, Q., Z. Ma, W. Huang, X.-Y. Huang, D. M Barker, Y.-H. Kuo, and J. Michalakes, 2005: Development of the WRF tangent linear and adjoint models: Nonlinear and linear evolution of initial perturbations and adjoint sensitivity analysis at high southern latitudes. WRF/MM5 users' workshop, Boulder, Colorado, 27-29 June 2005. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2005/abstracts/Session10/6-Xiao.pdf]

Barker, D.M., Y.-R. Guo, W. Huang, S. Rizvi, Q.-N. Xiao, Y.-H. Kuo, J. Gu, X.-Y. Huang and M.-S. Lee, 2005. WRF-Var – A Unified Variational Data Assimilation System for WRF. WRF/MM5 users' workshop, Boulder, Colorado, 27-29 June 2005. [http://www.mmm.ucar.edu/wrf/users/workshops/WS2005/abstracts/Session10/1-Barker.pdf]

2003

Huang, X.-Y., H. Vedel, N. Gustafsson, M. Ridal, A. Jupp, D. Offiler, J. Eyre, B. Navascues, J. Garcia-Moya, R. Ferretti, C. Faccani, G. Visconti, S. de Haan, J. de Vries, S. Barlag, H. Jarvinen, R. Eresmaa, O.F. dAndon, O. Lesne, W. Jiang, G. Elgered, J. Johansson, O. Kristansen, H.P. Kierulf, H.-P. Plag, F. Vespe, R. Pacione, A. Rius, E. Brockmann, J. Dousa, V. Filler, H. van der Marel, 2003: TOUGH: Targeting optimal use of GPS humidity measurements in meteorology. International Workshop on GPS Meteorology. Tsukuba, Japan, 14-17 Jan. 2003.

Huang, X.-Y., Gustafsson, N. and Unden, P. 2003. HIRLAM 4D-VAR: where we are and where we go. HIRLAM Newsletter, 44, 32-48.

Huang, X.-Y. and Vedel, H. 2003. An introduction to data assimilation. Proceedings, 2nd EUMETSAT GRAS-SAF user workshop, Helsingør, Denmark, 11-13 June 2003.

Yang, X. and Huang, X.-Y. 2003. A recent study on the initialization procedure in HIRLAM. HIRLAM Newsletter 43, 168-178.

Huang, X.-Y. and Lindskog, M. 2003. Assimilating European wind profiler data with the HIRLAM variational data assimilation system. HIRLAM Technical Report, 61, 29pp.

Huang, X.-Y., et. al. 2003. TOUGH: Targeting optimal use of GPS humidity measurements in meteorology. International Workshop on GPS Meteorology. Tsukuba, Japan, 14-17 Jan. 2003.

Vedel, H. and Huang, X.-Y. 2003 A NWP impact study with ground based GPS data. International Workshop on GPS Meteorology. Tsukuba, Japan, 14-17 Jan. 2003.

2002

Huang, X.-Y., Yang, X., Gustafsson, N., Mogensen, K. and Lindskog, M. 2002. Four-dimensional variational data assimilation for a limited area model. HIRLAM Technical Report, 57, 44pp.

Huang, X.-Y., Mogensen, K. and Yang, X. 2002. First-Guess at the appropriate time: the HIRLAM implementation and experiments. HIRLAM Workshop on Variational Data Assimilation and Remote Sensing, Workshop Report, 28-43.

Huang, X.-Y. and Yang, X. 2002. A new implementation of digital filtering initialization schemes for HIRLAM. HIRLAM Technical Report No. 53, 36 pp.

2001

Huang, X.-Y. and Yang, X. 2001. Recoded initialization interface. HIRLAM Newsletter, 38, 167-173.

2000

Mogensen, K.S., Jørgensen, J.U., Amstrup, B., Yang, X. and Huang, X.-Y. 2000. Towards an operational implementation of HIRLAM 3D-VAR at DMI. Scientific Report 00-16, Danish Meteorological Institute, 42pp.

Amstrup, B., Mogensen, K.S. and Huang, X.-Y. 2000. Use of GPS observations in an optimum interpolation based data assimilation system. Scientific Report 00-14, Danish Meteorological Institute, 20pp.

Amstrup, B. and Huang, X.-Y. 2000. Recent observing system experiments using the OI-based HIRLAM forecasting system. The second CGC-WMO workshop on the impact of observing systems on numerical weather prediction. 6-8 March 2000, Toulouse, France.

Before 2000

Huang, X.-Y., Gustafsson, N. and Robertson, L. 1999. OBJECTIVE ANALYSIS. Numerical exercise instructions.

Mogensen, K. S. and Huang, X.-Y. 1998. Variational parameter estimation with the Lorenz model. HIRLAM Technical Report No. 33, 29 pp.

Huang, X.-Y. 1998. An overview of the HIRLAM simplified 4DVAR. In Preprints, HIRLAM Workshop on variational analysis in limited area models, 23-25 February 1998, Toulouse, France.

Pailleux, J., M. Bader, W. Wergen, X.-Y. Huang, and H. Bottger, 1998: Improving EUCOS in data-sparse areas by conventional means. Report from expert meeting on EUCOS (Paris, Feb 1998), available at: [http://www.eumetnet.eu.org/contexcos.html]

Huang, X.-Y. 1997. Observing system experiments performed with the HIRLAM forecasting system. CGC-WMO workshop on the impact of observing systems on numerical forecasts. 7-9 April 1997, WMO, Geneva, Switzerland.

Huang, X.-Y. 1996. Horizontal diffusion and filtering in a mesoscale numerical weather prediction model. Scientific report 96-5, Danish Meteorological Institute.

Huang, X.-Y. and Yang, X. 1996. Variational data assimilation with the Lorenz model. HIRLAM Technical Report No. 26, 42 pp.

Laursen, L., Huang, X.-Y. and Nielsen, N.W. 1995. On the application of the HIRLAM system in Denmark, Greenland and China. In preprints, WMO symposium on limited area modelling, October 1995, Beijing, China. 311-315.

Gustafsson, N and Huang, X.-Y. 1994. Experiments with re-analysis cycles and analysis "cool starts". HIRLAM Newsletter No. 17, 43-46.

Huang, X.-Y. 1991. Grouping of clouds and internal gravity waves in a non-hydrostatic model of moist convection. University of Stockholm, Department of Meteorology/International Meteorological Institute in Stockholm, Report DM-55, pp 44.

Kristjansson, J. E. and Huang, X.-Y. 1990. Implementation of a consistent scheme for condensation and clouds in HIRLAM. HIRLAM Technical Report No. 7.

Källen, E. and Huang, X.-Y. 1988. Perturbation sensitivity on the cyclone scale in the ECMWF model. Preprint volume for Palmen memorial symposium on extratropical cyclones, 29 Aug.- 2 Sept. 1988, Helsinki, Finland, 314-317.

Huang, X.-Y. 1988. Nonlinear effects in models of convection. Ph.D. thesis, University of Stockholm.