81001. Simmons, A. and Hollingsworth, A.. Some aspects of the improvement in skill of numerical weather prediction. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 2001. Call Number: QC/996/S562/2001. 

81002. Simmons, A. and Hollingsworth, A.. Some aspects of the improvement in skill of numerical weather prediction. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 2001. Call Number: QC/996/S562/2001. 

81003. Simmons, A. J.. Dynamics of large-scale atmospheric motion. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1979. Call Number: QC/880.4/A8/S562/1979. 

81004. Simmons, A. J.. Tropical influences on stationary wave motion in middle and high latitudes.. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1981. Call Number: QC/996/F563/1981. 

81005. Simmons, A. J.. Dynamics of large-scale atmospheric motion. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1979. Call Number: QC/880.4/A8/S562/1979. 

81006. Simmons, A. J.. Tropical influences on stationary wave motion in middle and high latitudes.. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1981. Call Number: QC/996/F563/1981. 

81007. Simmons, A. J. and Jiabin, Chen. The calculation of geopotential and the pressure gradient in the ECMWF atmospheric model: Influence on the simulation of the polar atmosphere and on temperature analyses. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1990. Call Number: QC/996/S564/1990. 

81008. Simmons, A. J. and Jiabin, Chen. The calculation of geopotential and the pressure gradient in the ECMWF atmospheric model: Influence on the simulation of the polar atmosphere and on temperature analyses. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1990. Call Number: QC/996/S564/1990. 

81009. Simmons, A. J. and Strufing, R.. An energy and angular momentum conserving finite-difference scheme, hybid coordinates and medium-range weather prediction. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1981. Call Number: QC/996/S563/1981. 

81010. Simmons, A. J. and Strufing, R.. An energy and angular momentum conserving finite-difference scheme, hybid coordinates and medium-range weather prediction. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 1981. Call Number: QC/996/S563/1981. 

81011. Simmons, A. J. and Temperton, C.. Stability of a two-time-level semi-implicit integration scheme for gravity-wave motion. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1996. Call Number: QC/880.4/A8/S56/1996. 

81012. Simmons, A. J. and Temperton, C.. Stability of a two-time-level semi-implicit integration scheme for gravity-wave motion. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1996. Call Number: QC/880.4/A8/S56/1996. 

81013. Simmons, A. J.; Anderson, E. and Fisher, M.. Forecasting system performance in summer 1999, part 2: Impact of changes to the ECMWF system. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 2000. Call Number: QC/996/F67/2000/pt.2. 

81014. Simmons, A. J.; Anderson, E. and Fisher, M.. Forecasting system performance in summer 1999, part 2: Impact of changes to the ECMWF system. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 2000. Call Number: QC/996/F67/2000/pt.2. 

81015. Simmons, A. J.; Dell'Osso, L.; Hoyer, J. M. and Sakellarides, G.. Some results from studies of increased horizontal and vertical resolution. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1987. Call Number: QC/996/S565/1987. 

81016. Simmons, A. J.; Dell'Osso, L.; Hoyer, J. M. and Sakellarides, G.. Some results from studies of increased horizontal and vertical resolution. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1987. Call Number: QC/996/S565/1987. 

81017. Simmons, A. J.; Jones, P. D. and da Costa Bechtold, V.. Comparison of trends and variability in CRU, ERA-40 and NCEP/NCAR analysis of monthly-mean surface air temperatures. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), ECMWF Re-Analysis Project (ERA), 2004. Call Number: QC/994.95/E77/no.18. 

81018. Simmons, A. J.; Jones, P. D. and da Costa Bechtold, V.. Comparison of trends and variability in CRU, ERA-40 and NCEP/NCAR analysis of monthly-mean surface air temperatures. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), ECMWF Re-Analysis Project (ERA), 2004. Call Number: QC/994.95/E77/no.18. 

81019. Simmons, A. J.; Mureau, R. and Petroliagis, T.. Error growth and predictability estimates for the ECMWF forecasting system. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1994. Call Number: QC/996/S56/1994. 

81020. Simmons, A. J.; Mureau, R. and Petroliagis, T.. Error growth and predictability estimates for the ECMWF forecasting system. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1994. Call Number: QC/996/S56/1994. 

81021. Simmons, A. J.; Poli, P. and Dee, D. P.. Estimating low-frequency variability and trends in atmospheric temperature using ERA-Interim, revised. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 2014. Call Number: QC/994.95/E78/no.15, revised. 

81022. Simmons, A. J.; Poli, P. and Dee, D. P.. Estimating low-frequency variability and trends in atmospheric temperature using ERA-Interim, revised. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 2014. Call Number: QC/994.95/E78/no.15, revised. 

81023. Simmons, A. J.; Poli, P. and Dee, D. P.. Estimating low-frequency variability and trends in atmospheric temperature using ERA-Interim. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 2013. Call Number: QC/994.95/E78/no.15. 

81024. Simmons, A. J.; Poli, P. and Dee, D. P.. Estimating low-frequency variability and trends in atmospheric temperature using ERA-Interim. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), 2013. Call Number: QC/994.95/E78/no.15. 

81025. Simmons, A. J.; Untch, A.; Jakob, C.; Kallberg, P. and Unden, P.. Stratospheric water vapour and tropical tropopause temperatures in ECMWF analyses and multi-year simulations. Reading, UK, European Centre for Medium-range Weather Forecasts (ECMWF), Research Department, 1998. Call Number: QC/915/S77/1998.