Abstract. To improve the initial condition (“analysis”) for numerical weather prediction, we attempt to assimilate observations from Advanced Microwave Sounding Unit-A (AMSU-A) on board low-Earth-orbiting satellites. The data assimilation system, used in this study, consists of Data Assimilation Research Testbed (DART) and Community Earth System Model as global forecast model. Based ensemble Ka...

Measurements made by microwave sounding instruments provide a multidecadal record of atmospheric temperature in several thick atmospheric layers. Satellite measurements began in late 1978 with the launch of the first Microwave Sounding Unit (MSU) and have continued to the present via the use of measurements from the follow-on series of instruments, the Advanced Microwave Sounding Unit (AMSU). T...

Abstract The all-sky assimilation of radiances from microwave instruments is developed in the 4D-EnVar analysis system at Environment and Climate Change Canada (ECCC). Assimilation cloud-affected Advanced Microwave Sounding Unit-A (AMSU-A) temperature sounding channels 4 5 for non-precipitating scenes over ocean surface focus this study. Cloud-affected are discarded ECCC operational data due to...

The temporal consistency of the moisture fields (precipitation, evaporation and total precipitable water) from five global reanalyses is examined over Antarctica and the Southern Ocean during 1989–2009. This concern is important given that (1) global reanalyses are known to be prone to inhomogeneities and artificial trends caused by changes in the observing system, and (2) the period of study h...

A novel algorithm for the detection of precipitation is described and tested. The algorithm is applicable to any modern passive microwave radiometer on board polar orbiting satellites independent of the observation geometry and channel frequency assortment. The algorithm is based on the application of canonical correlation analysis and on the definition of a threshold to be applied to the resul...

A 10-m air temperature (Ta) retrieval using Advanced Microwave Sounding Unit A (AMSU-A) and satellite-derived sea surface temperature (Ts) observations is presented. The multivariable linear regression retrieval uses AMSU-A brightness temperatures from the 52.8and 53.6-GHz channels and satellite-derived daily sea surface temperatures to determine Ta. A regression error of 0.838C using 841 match...

Comparisons of satellite temperature profile products from GPS radio occultation (RO) and hyperspectral infrared (IR)/microwave (MW) sounders are made using a previously developed matchup technique. The profile matchup technique matches GPS RO and IR/MW sounder profiles temporally, within 1 h, and spatially, taking into account the unique RO profile geometry and theoretical spatial resolution b...

In this study, the Fengyun-3D (FY-3D) clear-sky microwave temperature sounder-2 (MWTS-2) radiances were directly assimilated in regional mesoscale Weather Research and Forecasting (WRF) model using Gridpoint Statistical Interpolation (GSI) data assimilation system. The experiments conducted to compare track errors of typhoon Lekima from uses Advanced Microwave Sounding Unit-A (AMSU-A) (EXP_AD) ...