Results 21 to 30 of about 1,187,144 (257)

Height connection across sea by using satellite altimetry data sets, ellipsoidal heights, astrogeodetic deflections of the vertical, and an Earth Gravity Model

Geodesy and Geodynamics, 2023
Islands and the mainland are separated by seas, and the distances between them might be so long that the height on the mainland cannot be exactly translated to the islands, resulting in different height systems on the mainland and the islands.
Jianbo Wang, Xinmin Qi, Kai Luo, Zhengyuan Li, Ruikang Zhou, Jinyun Guo   +5 more
doaj   +1 more source

The atmospheric quasi-biweekly oscillation during the Jiangnan Meiyu onset period

Frontiers in Earth Science, 2022
Meiyu is a typical rainy season during the East Asian Summer Monsoon whose early or late onset is closely related to an abnormal amount of rainfall. Based on the ERA-interim daily reanalysis data from 1979 to 2019 and the Meiyu index dataset provided by ...
Tianle Sun, Suxiang Yao, Qian Huang
doaj   +1 more source

Probabilistic wind forecasting up to three months ahead using ensemble predictions for geopotential height

, 2020
We develop a method for forecasting the distribution of the daily surface wind speed at timescales from 15-days to 3-months in France. On such long-term timescales, ensemble predictions of the surface wind speed have poor performance, however, the wind ...
B. Alonzo, P. Tankov, P. Drobinski, R. Plougonven   +3 more
semanticscholar   +1 more source

A preliminary experiment of determining the geopotential difference using two hydrogen atomic clocks and TWSTFT technique

Geodesy and Geodynamics, 2020
General relativity theory (GRT) concludes that a precise clock ticks at different running rates if it is under the influence of different geopotentials.
Kuangchao Wu, Ziyu Shen, Wenbin Shen, Xiao Sun, Chenghui Cai, Yifan Wu   +5 more
doaj   +1 more source

Study of Some Patterns for Severe Rainfalls Over Iraq

Al-Mustansiriyah Journal of Science, 2020
Study of rain received particularly great importance in the areas described as semi-arid, which is on the other hand are not well prepared for the drainage of rain that may turned into flash floods.
Yaser Ali Shaghati
doaj   +1 more source

Can Machines Learn to Predict Weather? Using Deep Learning to Predict Gridded 500‐hPa Geopotential Height From Historical Weather Data

Journal of Advances in Modeling Earth Systems, 2019
We develop elementary weather prediction models using deep convolutional neural networks (CNNs) trained on past weather data to forecast one or two fundamental meteorological fields on a Northern Hemisphere grid with no explicit knowledge about physical ...
Jonathan A. Weyn, D. Durran, R. Caruana
semanticscholar   +1 more source

Evaluation of the geopotential value W0LVD of China

Geodesy and Geodynamics, 2017
Estimation of the zero-height geopotential value W0LVD for the CVD (China Vertical Datum) plays a fundamental role in the connection of traditional height reference systems into a global height system.
Lin He, Yonghai Chu, Nan Yu
doaj   +1 more source

Probabilistic Forecasting of the 500 hPa Geopotential Height over the Northern Hemisphere Using TIGGE Multi-model Ensemble Forecasts

Atmosphere, 2021
Bayesian model averaging (BMA) and ensemble model output statistics (EMOS) were used to improve the prediction skill of the 500 hPa geopotential height field over the northern hemisphere with lead times of 1–7 days based on ensemble forecasts from the ...
Luying Ji, Qixiang Luo, Yan Ji, Xiefei Zhi   +3 more
doaj   +1 more source

Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model

Scientific Reports, 2022
Notable changes in the wintertime Arctic atmospheric circulation have occurred over the last few decades. Despite its importance in understanding the recent changes in the Northern Hemisphere midlatitude climate, it remains unclear whether and how these ...
Heeje Cho, Jong-Seong Kug, Sang-Yoon Jun
doaj   +1 more source

Dominant Patterns of Winter Temperature Variation in Yunnan and Key Circulation Factors Affecting on Them

Gaoyuan qixiang, 2023
To reveal the main characteristics of winter temperature change in Yunnan and the key circulation factors affecting on it， the winter temperature variation is first investigated by using monthly mean temperature data of 124 meteorological observation ...
Hongming YAN, Ling WANG, Yan JIN, Siyuan MA, Wenmao LI, Yunxia WAN   +5 more
doaj   +1 more source