Results 41 to 50 of about 4,394 (252)
Evaluating seasonal forecast improvements over the past two decades
Quarterly Journal of the Royal Meteorological Society, EarlyView.We have analysed the performance of operational seasonal forecasting models since their inception. Clear improvements are measured through the different model eras, particularly in the Tropics. For the extratropics, the strongest improvements are evident during the boreal winter season over the North Pacific/North America, linked to improvements in the
Christopher H. O'Reilly +4 more
wiley +1 more source
Comparison of ECMWF analyses with GPS radio occultations from CHAMP [PDF]
Annales Geophysicae, 2008 A climatological validation of the 6-hourly operational ECMWF troposphere and lower stratosphere temperatures as well as geopotential heights between 1000 and 10 hPa is performed using the 2001–2007 (80 months from May 2001 to December 2007) CHAMP ...
T. Schmidt +7 more
doaj +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.Ensemble Kalman filters (EnKFs) with quality control (QC) are commonly used in the data assimilation (DA) of all‐sky satellite‐sensed infrared radiance (IR) observations. However, the statistical assumptions underlying EnKFs and QC are violated in such DA.
Man‐Yau Chan
wiley +1 more source
On the meridional asymmetry of the poleward‐displaced intertropical convergence zone
Quarterly Journal of the Royal Meteorological Society, EarlyView.We analyze the complex, asymmetrical dynamical structure of the intertropical convergence zone (ITCZ) in the East Pacific and Atlantic basins, seen during boreal summer, using a global, coupled storm‐resolving simulation. The equatorial pressure gradients lead to the acceleration of southerlies, which decelerate when the zonal flow becomes westerly ...
Divya Sri Praturi, Bjorn Stevens
wiley +1 more source
Mesoscale dynamics of cyclone Leslie (2018): A diagnostic analysis of a rare Iberian landfall
Quarterly Journal of the Royal Meteorological Society, EarlyView.This study presents a successful numerical simulation of cyclone Leslie (2018), using WRF‐ARW v4.5.1. Several mesoscale dynamics were identified indicative of the occurrence of sting jet and cold conveyor belt, which potentiated the record‐breaking winds in central Portugal.
Miguel M. Lima +5 more
wiley +1 more source
On the connection of the Ecuadorian Vertical Datum to the IHRS
Journal of Geodetic Science, 2023 In this work, the determination of the discrepancy between the Ecuadorian Vertical Datum (EVD) and the International Height Reference System (IHRS) is presented.
Carrión José L. +2 more
doaj +1 more source
An Assessment of Recently Released High-Degree Global Geopotential Models Based on Heterogeneous Geodetic and Ocean Data [PDF]
, 2021 Yihao Wu +3 more
openalex +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.The standalone non‐local thermodynamic equilibrium (NLTE) bias correction schemes, utilizing a look‐up‐table and a linear regression method developed in Part I and new quality control procedures for short‐wave infrared radiances (SWIR), were tested within a data assimilation framework.
Agnes H. N. Lim +3 more
wiley +1 more source
A Synoptic Analysis of Cyclonic Activity During 1961-2003 [PDF]
مخاطرات محیط طبیعی, 2012 Mid-latitude cyclones play an important role in precipitation over Iran. A survey on 6-hourly geopotential height of 1000 hPa level showed that the number of cyclones in the studied area reveals a positive trend.
Seyyed Abolfazl Masoodian
doaj +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.An Iberia‐Central Mediterranean trough sequence (7–10 February 2018) delivers anomalous low‐level temperature tendencies attributable to dynamics across most of northern Africa, with warming over northeastern Africa, especially 10–12 February into the eastern Sahel. An ECMWF product attributes the tendencies (see Figure).
Neil Ward +3 more
wiley +1 more source