Abstract Since the development of GNSS techniques, determination a precise quasi-geoid model has become even more actual. In terms this project staff Institute Geodesy and Geoinformatics (GGI) developed new based on DFHRS (Digital Finite-element Height Reference Surface) approach additionally using astrogeodetic measurements – vertical deflections (VD), which can be observed by Digital zenith c...

Abstract The North China mid-summer (July) precipitation (NCJP) contributes the largest proportion of total annual in China, with significant interdecadal and interannual variability. variability NCJP was further investigated on basis a study its found that sea surface temperature (SST) pattern July located northwest Pacific, defined here as Pacific SST tripole (NWPT), can significantly influen...

Abstract This study investigates the influence of interannual variability Indian Ocean tripole (IOT) on summertime cold extremes in Central Siberia. During positive IOT phases, two cross‐equatorial airflows are induced over tropical eastern and western Ocean. These strengthen ascending motion southern Asia (80°–125°E, 15°–25°N), increasing precipitation situ, as evidenced observations simulatio...

In this study, we investigated the effects of Tibetan High near tropopause and North Pacific in troposphere on occurrences hot or cool summers Japan. We first classified Japan into six regions identified summer years these from a 38-year sample (1980–2017) based monthly air temperature. To investigate features circulation fields over Asia during Japan, calculated composite differences (hot minu...

In this study, a pattern detection method is applied on the RCP4.5 and RCP8.5 simulation outputs of seven GCMs—disseminated by Coupled Model Intercomparison Project Phase 5 (CMIP5)—to determine whether atmospheric teleconnection patterns detected in ERA-20C reanalysis from European Centre for Medium-Range Weather Forecasts (ECMWF) will be observable future projections CMIP5 GCMs. The technique—...

A new advanced microwave humidity sounder FY-3D MWHS2 radiance has been assimilated under the clear-sky conditions by implementing its data assimilation interface. The case of tropical storm Ampil in 2018 is selected to address effectiveness new-built module initialization and forecast typhoons. Apart from experiment assimilating both Global Telecommunications System (GTS) data, an with only GT...

Ensemble prediction systems are an invaluable tool for weather forecasting. Practically, ensemble predictions obtained by running several perturbations of the deterministic control forecast. However, is associated with a high computational cost and often involves statistical post-processing steps to improve its quality. Here we propose use deep-learning-based algorithms learn properties system,...

The Northern Hemisphere summer climate isstrongly affected by a circumglobal stationary Rossby wave train, which can be manifested the first EOF mode of geopotential height at 200 hPa. Interannual variation this (NHW) pattern has significant impact on remarkably warm surface temperature anomalies over North Atlantic, Northeast Europe, East Asia to Central-North Pacific, and America, particularl...

This study presents the daily atmospheric circulation patterns at surface and altitude related to South Atlantic Convergence Zone (SACZ) events that occurred between 2007 2017. For this analysis, Principal Pattern Sequence Analysis (PPSA) sea level pressure geopotential height reanalysis were used. Four typical associated with SACZ episodes identified. Three of them are propagation a cold front...