A5060690531- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Climate change and permafrost
- Hepatitis B Virus Studies
- Hepatitis Viruses Studies and Epidemiology
- Influenza Virus Research Studies
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Oceanographic and Atmospheric Processes
- Viral Infections and Vectors
- Viral gastroenteritis research and epidemiology
- Vector-borne infectious diseases
- Fish Ecology and Management Studies
- Advanced Fiber Optic Sensors
- Liver Diseases and Immunity
- Advanced biosensing and bioanalysis techniques
- Marine and fisheries research
- Underwater Acoustics Research
- Methane Hydrates and Related Phenomena
- Optical Network Technologies
- Bacillus and Francisella bacterial research
- Atmospheric aerosols and clouds
- Viral Infections and Outbreaks Research
- Aquatic life and conservation
- Gut microbiota and health
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2020-2024
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
2020-2024
Polar Research Institute of China
2019-2024
Sun Yat-sen University
2019-2024
Finnish Meteorological Institute
2024
Norwegian Polar Institute
2024
Environment and Climate Change Canada
2024
National University of Singapore
2024
Chongqing University
2024
Chongqing Medical University
2021-2023
Temporal and spatial variation of sea ice type in the Arctic is an indicator regional global change. can be classified into two major categories: multiyear (MYI) first-year ice. In this paper, classification method based on machine learning established applied to produce daily data set during winter (November-April) from 2002 2017 using active microwave QuikSCAT Advanced Scatterometer as well passive Microwave Scanning Radiometer for EOS, Special Sensor Imager/Sounder, 2 radiometer. First,...
Although anaplasmosis cases have been nationally identified in China, no human isolates of A. phagocytophilum obtained, which limits the analysis any molecular and genetic contributions to patients' severe clinical manifestations study bacteria's pathogeneses China. Given this situation, a joint project was conducted 2009–2010. A total 421 febrile unknown etiology were collected blood samples for laboratory diagnoses including serologic diagnosis based on four-fold rise anti- IgG titer by...
In data-sparse regions such as the Arctic, atmospheric reanalysis is one of key tools for understanding rapid climate change at regional and global scales. The utility datasets based on data assimilation affected by their accuracy biases. Therefore, it important to evaluate performance. Here, we conduct inter-comparisons two temperature variables, namely, 2-m air (Ta) surface (Ts), from widely used ERA-I ERA5 provided European Centre Medium-Range Weather Forecasts (ECMWF) against in situ...
The temporal and spatial variability of the Antarctic coastline is a clear indicator change in extent mass balance ice sheets shelves. In this study, Canny edge detector was utilized to automatically extract high-resolution information for 2005, 2010, 2017, based on optical microwave satellite data. order improve accuracy extracted coastlines, we developed algorithm by calculating local low high thresholds via intensity histogram each image derive distinguish sheet from water. A visual...
As a result of global warming, multiyear ice (MYI) is being replaced by first-year (FYI) in the Arctic. Microwave scatterometers Ku-band and C-band can provide daily observations sea type. However, their comparative capabilities mapping type have not been thoroughly evaluated. We present systematic intercomparison backscatter signature VV polarization ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...
A low-numerical aperture (NA) confined-doped long-tapered (LCT) Yb-doped fiber is proposed and fabricated by modified chemical vapor deposition combined with solution doping technique. The LCT owns the core NA of ∼0.05 gain dopant diameter ratio ∼77%, a core/cladding 25/400 µm at both ends 37.5/600 in middle. laser performance demonstrated bidirectional pumping all-fiber amplifier, which 4.18-kW single-mode (M2 factor ∼1.3) output achieved slope efficiency ∼82.8%. Compared conventional...
The presence or absence of sea ice introduces a substantial perturbation to surface&#8210;atmosphere energy exchanges. Comprehending the effect varying cover on interactions is an important consideration for understanding Arctic climate system. recurring North Water Polynya (NOW) serves as natural laboratory isolating cloud responses rapid, near-step in ice. In this study, we employed high-resolution System Reanalysis version 2 (ASRv2) data estimate turbulent heat fluxes over NOW and...
Abstract Background Host genetic factors may play a role in the occurrence and progress of SARS-Cov infection. This study was to investigate relationship between tumor necrosis factor (TNF)- α gene polymorphisms with SARS-CoV infection its prognosis patients lung interstitial fibrosis femoral head osteonecrosis. Methods The association TNF-α susceptibility severe acute respiratory syndromes (SARS) conducted hospital-based case-control including 75 SARS patients, 41 health care workers 92...
The Northwest Passage (NWP) in the Arctic is usually covered with hazardous multi-year ice (MYI) and seasonal first-year (FYI) winter, possible thin open-water areas during transition seasons. Ice classification important for both marine navigation climate change studies. Satellite-based Synthetic Aperture Radar (SAR) systems have shown advantages of retrieving this information. Operational mapping relies on visual analysis SAR images along ancillary data. However, these maps estimate types...
As emerging tick born rickettsial diseases caused by A. phagocytophilum and E. chaffeensis , anaplasmosis ehrlichiosis have become a serious threat to human animal health throughout the world. In particular, in China, an unusual transmission of nosocomial cases granulocytic occurred Anhui Province 2006 more recent coinfection case was documented Shandong Province. Although seroprevalence (former ehrlichiosis, HGE) has been several studies, these data existed on local investigations, also...
Fishery resources are threatened by environmental changes and anthropogenic pressures, particularly in coastal ecosystems. It is crucial to understand the of fish communities their responses human disturbances formulate rational fisheries ecosystem-based management. The Pearl River Estuary (PRE) a typical sub-tropic ecosystem located center Guangdong-Hong Kong-Macao Greater Bay Area northern South China Sea. demersal PRE traditionally targeted as commercial fishing severely impacted...
Estuaries are one of the most important ecosystems with high biological productivity. They connect freshwater and marine ecosystems, fish community assemblages face intense environmental changes, so estuarine communities have unique ecological characteristics. With increase human activities discharge pollutants, pressure on ecosystem Pearl River Estuary (PRE) is intensifying, its functions services inevitably affected. To better understand functional structure in PRE response to we analyzed...
The surface energy budget is crucial for Arctic sea ice mass balance calculation and climate systems, among which turbulent heat fluxes significantly affect the air–sea exchanges of moisture in atmospheric boundary layer. Satellite observations (e.g. CERES APP-X) reanalyses (e.g., ERA5) are often used to represent components at regional pan-Arctic scales. However, uncertainties satellite-based largely unknown, cross-comparisons with reanalysis data in-situ limited. In this study, were...
The neutral form drag coefficient is an important parameter when estimating surface turbulent fluxes over Arctic sea ice. caused by features ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C<sub>dn,fr</sub></i> ) dominates the total in winter, but long-term pan-Arctic records of are still lacking for In this study, we first developed improved feature detection algorithm and characterized (including height spacing) ice during late winter...
The neutral form drag coefficient is an important parameter when estimating surface turbulent fluxes over Arctic sea ice. caused by features (𝑪) dominates the total in winter, but long-term pan-Arctic records of 𝑪 are still lacking for In this study, we first developed improved feature detection algorithm and characterized (including height spacing) ice during late winter 2009-2019 using full-scan laser altimeter data obtained Operation IceBridge mission. was then estimated existing...
In recent decades, hypoxic areas have rapidly expanded worldwide in estuaries and coastal zones. The Pearl River Estuary (PRE), one of China's largest estuaries, experiences frequent seasonal hypoxia due to intense human activities eutrophication. However, the ecological effects PRE, particularly on fish communities, remain unclear. To explore these effects, we collected community environmental data July 2021 during summer development period. results revealed that bottom-layer dissolved...
Abstract The North Water Polynya (NOW) is the largest recurrent Arctic coastal polynya. formation of NOW critically dependent on development an ice arch that defines its northern boundary. In this study, high‐resolution ENVISAT Advanced Synthetic Aperture Radar data, Sentinel‐1A and Moderate Resolution Imaging Spectroradiometer data were employed to identify spatio‐temporal characteristics during 2006–2019. pixels identified based thin thickness (TIT), using a threshold TIT <0.2 m, from...
To describe clinical characteristics of severe acute respiratory syndrome (SARS) patients in a hospital Tianjin, China, thereby comparing probable and suspected cases; to study risk factors associated with the death implementation preventive interventions during outbreak.Physical haematological information was obtained from records. White blood cell counts, percentages neutrophilic granulocytes lymphocytes were measured. The service department provided about daily use protective materials....
In China, both inactivated hepatitis A (HA) vaccine and live attenuated HA are available. We conducted a trial to evaluate 5-year immune persistence induced by one dose of or vaccines in children. Subjects with no vaccination history had randomly received at 18–60 months age. Anti-HAV antibody concentrations were measured before the first, second, fifth year after vaccination. Suspected cases monitored during study period. total 332 subjects enrolled 182 provided evaluable serum samples all...
Ytterbium doped fiber lasers (YDFLs) with small volume, good beam quality, heat dissipation performance and high conversion efficiency are widely used in industrial processing, military, medical other fields. In past decades, the development of high-performance double cladding gain devices, output power YDFLs increases rapidly. However, nonlinear effects (NLEs), such as stimulated Brillouin scattering (SBS), Raman (SRS), produced, which limits further enhancement laser. Large mode area...