Wanchun Zhang

National Satellite Meteorological Center

The successive tidal force (TF) at the epicenter of the Jiashi M6.6 earthquake in Xinjiang, China, was calculated for the period from 13 December 2019 to 10 February 2020. With periodic changes in tide-generating forces, the variations in the electron density (Ne) data recorded by the China Seismo-Electromagnetic Satellite (CSES) and outgoing longw...

The present study compares the spatial and temporal characteristics of the Madden-Julian Oscillation (MJO) in Fengyun-3B (FY-3B) polar-orbiting satellite reprocessed outgoing longwave radiation (OLR) data and NOAA OLR data during 2011–2020. The spatial distributions of climatological mean and intraseasonal standard deviation of FY-3B OLR during bor...

Outgoing longwave radiation (OLR) at the top of the atmosphere (TOA) is a key parameter for understanding and interpreting the relationship between clouds, radiation, and climate interactions. It has been one of the operational products of the Fengyun (FY) meteorological satellites. OLR accuracy has gradually improved with advancements in satellite...

The present study evaluates spatial and temporal characteristics of the Fengyun-3B (FY-3B)’s outgoing longwave radiation (OLR) data based on NOAA OLR data and the GPCP (Global Precipitation Climatology Project) precipitation data over the Asian—Australian region during 2011–2019. In terms of climatological distribution patterns and interannual stan...

China will launch the Atmospheric Environment Monitoring Satellite, which is equipped with a CO2-IPDA LIDAR. It is of great significance to explore the feasibility and effectiveness of this novel technique and to identify potential differences among its CO2 concentration products and the passive remote sensing technique. In this work, we developed...

Plain Language Summary The effect of soil moisture (SM) on the evolution of planetary boundary layer (PBL) throughout China remains elusive. This study explores the correlation between PBL height (PBLH) and SM under different PBL regimes, using the 5‐year record of high‐resolution summertime soundings across China. The convective boundary layer (CB...

Strongly influenced by thermodynamic stability, the planetary boundary layer (PBL) is key to the exchange of heat, momentum, and moisture between the ground surface and free troposphere. The PBL with different thermodynamic stability across the whole China, however, is not yet well understood. In this study, the occurrence frequency and spatial dis...

Strongly influenced by thermodynamic stability, the planetary boundary layer (PBL) is key to the exchange of heat, momentum, and moisture between the ground surface and free troposphere. The PBL with different thermodynamic stability across the whole of China, however, is not yet well understood. In this study, the occurrence frequency and spatial...

Meteorological conditions within the planetary boundary layer (PBL) are closely governed by large-scale synoptic patterns and play important roles in air quality by directly and indirectly affecting the emission, transport, formation, and deposition of air pollutants. Partly due to the lack of long-term fine-resolution observations of the PBL, the...

Meteorological conditions within the planetary boundary layer (PBL) are closely governed by large-scale synoptic patterns and play important roles in air quality by directly and indirectly affecting the emission, transport, formation, and deposition of air pollutants. Partly due to the lack of long-term fine-resolution observations of the PBL, the...

The important roles of the planetary boundary layer (PBL) in climate, weather and air quality have long been recognized, but little is known about the PBL climatology in China. Using the fine-resolution sounding observations made across China and reanalysis data, we conducted a comprehensive investigation of the PBL in China from January 2011 to Ju...

Accurate estimation of planetary boundary layer height (PBLH) is key to air quality prediction, weather forecast, and assessment of regional climate change. The PBLH retrieval from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) is expected to complement ground-based measurements due to the broad spatial coverage of satellites. In thi...

The important roles of planetary boundary layer (PBL) in climate, weather and air quality have long been recognized, but little has been known about the PBL climatology in China. Using the fine-resolution sounding observations made across China and a reanalysis data, we conducted a comprehensive investigation of the PBL in China from January 2011 t...

The accurate estimation of boundary layer height is key to air quality prediction, weather forecast and so on. The planetary boundary layer height (PBLH) retrieval from CALIOP is expected to complement the ground-based site measurement due to its large spatial coverage. To such end, we estimated PBLHs from CALIOP, using the combination of Haar wave...

Because of the special geographical location and meteorology conditions, Beijing is a dust-prone city for a long history especially in the spring season. But these years, the most common air pollution in Beijing is haze which is mainly composed of fine particles. The dust is transported from north (Inner Mongolia province and Mongolia country), and...

Information on the vertical distribution of aerosol is important for understanding its transport characteristics as well as aerosol retrieval uncertainty. In this paper, the believable lidar ratio under clear sky condition during December 2014 is determined from ground-based lidar and sun-photometer site in Beijing. Then two methods are adopted to...

The impacts of haze emphasized significance of hazards for human activities and importance of observations of aerosol vertical distribution. This study aimed to analyze the aerosol vertical distribution during a haze case at temporal and spatial aspects, using space-borne and ground-based Lidar observations over Jinhua Basin, Zhejiang province, as...

In order to investigate characteristics of atmospheric boundary layer height (ABLH) during haze pollution, we used ground-based CE370-C micro pulse LiDAR to derive the ABLH during January 2013 over Beijing, based on the gradient method. We find that the ABLH in severe haze days is lower than that in weak haze days and beneath about 500 m, with dail...

This paper researches on the method how to retrieve the water-leaving reflectance from Chinese HJ1 CCD imagery. The instrument characteristics are first analyzed and then the monochromic atmosphere correction equation is described. Using the radiative transfer model, the correction parameters are worked out by varying different conditions such as s...

Remote sensed images provide useful information of the atmosphere. The aim of this study is to introduce the temperature profile of the atmosphere from Moderate-resolution Imaging Spectroradiometer (MODIS), and compare it with the Thermodynamic Initial Guess Retrieval (TIGR) data set, the atmospheric temperature profile from Second Simulation of th...

Field investigation revealed series of undeformed acidic dike swarm developed between the Ertix active fault and the Fuyun-Xibodu fault in the eastern segment of the Ertix tectonic belt, southern Altai orogeny, where Hercynian gneissic granites and the Upper Carboniferous Ertix Formation outcropped. The content of SiO2 in the dike is 70.9% - 75.38%...