Results 31 to 40 of about 2,567 (220)
International Journal of Climatology, EarlyView.This study, by examining a typical stratospheric intrusion event that occurred in North China from 30 to 31 July 2021, found that the event led to a sharp increase in near‐surface ozone concentrations by 23 ppbv within 36 h, accounting for 40% of the total observed ozone levels, with localised peaks exceeding 30 ppbv.
Yinghan Sun, Zhicong Yin, Yijia Zhang
wiley +1 more source
Forecast Assessment of CMA-GFS on the Meteorological Elements in the Northeast Hemisphere
Gaoyuan qixiang, 2023 Based on the daily forecast data initialized at 20:00 （Beijing time） of the CMA global forecast system （CMA-GFS） during the period from October， 2019 to December， 2020， the forecasting quality of the upper air meteorological elements in the Northeast ...
Chunjuan QI, Liujie PAN
doaj +1 more source
Seasonal Characteristics of Mesoscale Convective Systems Over the Philippines
International Journal of Climatology, EarlyView.This study examines how mesoscale convective systems (MCSs) over the Philippines are most frequent during boreal summer, while those in winter are longer‐lived and more intense due to cold surges and enhanced easterly moisture transport. Intraseasonal oscillations, such as the Madden‐Julian Oscillation (MJO) and the Boreal Summer Intraseasonal ...
Cathrene Lagare +3 more
wiley +1 more source
The Accuracy Verification of Recent Global Geopotential Model based on GNSS/Levelling Data on Ground Control Points in Johor [PDF]
E3S Web of ConferencesThe external gravitational field of the Earth is mathematically represented using spherical harmonic (SH) coefficients in the global geopotential model. Hence, the appropriate global geopotential model for a region needs to determine a reference surface ...
Qi Lee Z. +5 more
doaj +1 more source
IEEE Access, 2020 Based on the general relativity theory, the geopotential difference can be determined by comparing the change in time difference between precise clocks using the precise point positioning (PPP) time transfer technique, referred to as the relativistic PPP
Chenghui Cai +3 more
doaj +1 more source
A Cut-off low at 500 hPa Geopotential Height and Rainfall Events over Iraq: Case Studies
Iraqi Journal of Physics, 2022 A cut-off low is a closed low with a low value of geopotential height at the upper atmospheric levels that has been fully detached (cut-off) from the westerly flow and move independently. A cut-off low causes extreme rainfall events in the mid-latitudes
Mohammed Abdul Raheem Jabbar +1 more
doaj +1 more source
Characteristics of diabatically influenced cyclones with high wind damage potential in Europe
Quarterly Journal of the Royal Meteorological Society, EarlyView.Diabatic processes contribute, on average, 26% to the intensification of European winter storms, with diabatically driven cyclones exhibiting steeper deepening rates, stronger wind gusts, and increased precipitation. These storms are linked to enhanced warm conveyor belt (WCB) activity and develop in a warmer environment with elevated lower ...
Svenja Christ +2 more
wiley +1 more source
Reanalysis of summer pressure systems affecting Iran\'s atmosphere [PDF]
تحقیقات کاربردی علوم جغرافیایی, 2021 This study investigates the subtropical anticyclones and summer monsoons of the north hemisphere in the 500 hPa level, effective on Iran in a 38-year period (1975-2012).
mahdi khazaei
doaj
True Geopotential in Meteorology
, 2021 Geopotential in meteorology is the same as gravity potential in geodesy but with the opposite sign.
openaire +1 more source
Windows of opportunity in subseasonal weather regime forecasting: A statistical–dynamical approach
Quarterly Journal of the Royal Meteorological Society, EarlyView.This study explores how the atmospheric state at initialisation creates windows of opportunity for improving week 3 forecasts of weather regime activity. Greenland blocking activity increases following Madden–Julian Oscillation phases 7, 8, and 1 and weak stratospheric polar vortex states, revealing patterns exploitable by statistical models.
Fabian Mockert +3 more
wiley +1 more source